Scott Shawcroft
GitHub
commit
4a4d84ba42
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@ -47,4 +47,9 @@ void mp_keyboard_interrupt(void) {
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#endif
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}
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// Check to see if we've been CTRL-C'ed by autoreload or the user.
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bool mp_hal_is_interrupted(void) {
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return MP_STATE_VM(mp_pending_exception) == MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_kbd_exception));
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}
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#endif
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@ -26,8 +26,11 @@
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#ifndef MICROPY_INCLUDED_LIB_UTILS_INTERRUPT_CHAR_H
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#define MICROPY_INCLUDED_LIB_UTILS_INTERRUPT_CHAR_H
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#include <stdbool.h>
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extern int mp_interrupt_char;
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void mp_hal_set_interrupt_char(int c);
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void mp_keyboard_interrupt(void);
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bool mp_hal_is_interrupted(void);
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#endif // MICROPY_INCLUDED_LIB_UTILS_INTERRUPT_CHAR_H
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@ -308,6 +308,8 @@ SRC_COMMON_HAL = \
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busio/UART.c \
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digitalio/__init__.c \
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digitalio/DigitalInOut.c \
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i2cslave/__init__.c \
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i2cslave/I2CSlave.c \
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microcontroller/__init__.c \
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microcontroller/Pin.c \
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microcontroller/Processor.c \
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@ -62,3 +62,5 @@
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// USB is always used internally so skip the pin objects for it.
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#define IGNORE_PIN_PA24 1
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#define IGNORE_PIN_PA25 1
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#define CIRCUITPY_I2CSLAVE
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@ -47,3 +47,5 @@
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// USB is always used internally so skip the pin objects for it.
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#define IGNORE_PIN_PA24 1
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#define IGNORE_PIN_PA25 1
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#define CIRCUITPY_I2CSLAVE
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@ -63,3 +63,5 @@
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// USB is always used internally so skip the pin objects for it.
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#define IGNORE_PIN_PA24 1
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#define IGNORE_PIN_PA25 1
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#define CIRCUITPY_I2CSLAVE
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@ -48,3 +48,5 @@
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// USB is always used internally so skip the pin objects for it.
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#define IGNORE_PIN_PA24 1
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#define IGNORE_PIN_PA25 1
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#define CIRCUITPY_I2CSLAVE
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@ -39,39 +39,41 @@
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// Number of times to try to send packet if failed.
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#define ATTEMPTS 2
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Sercom *samd_i2c_get_sercom(const mcu_pin_obj_t* scl, const mcu_pin_obj_t* sda,
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uint8_t *sercom_index, uint32_t *sda_pinmux, uint32_t *scl_pinmux) {
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*sda_pinmux = 0;
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*scl_pinmux = 0;
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for (int i = 0; i < NUM_SERCOMS_PER_PIN; i++) {
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*sercom_index = sda->sercom[i].index;
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if (*sercom_index >= SERCOM_INST_NUM) {
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continue;
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}
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Sercom* potential_sercom = sercom_insts[*sercom_index];
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if (potential_sercom->I2CM.CTRLA.bit.ENABLE != 0 ||
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sda->sercom[i].pad != 0) {
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continue;
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}
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*sda_pinmux = PINMUX(sda->number, (i == 0) ? MUX_C : MUX_D);
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for (int j = 0; j < NUM_SERCOMS_PER_PIN; j++) {
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if (*sercom_index == scl->sercom[j].index &&
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scl->sercom[j].pad == 1) {
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*scl_pinmux = PINMUX(scl->number, (j == 0) ? MUX_C : MUX_D);
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return potential_sercom;
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}
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}
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}
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return NULL;
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}
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void common_hal_busio_i2c_construct(busio_i2c_obj_t *self,
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const mcu_pin_obj_t* scl, const mcu_pin_obj_t* sda, uint32_t frequency, uint32_t timeout) {
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#ifdef PIRKEY_M0
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mp_raise_NotImplementedError(translate("Not enough pins available"));
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return;
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#endif
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Sercom* sercom = NULL;
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uint8_t sercom_index;
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uint32_t sda_pinmux = 0;
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uint32_t scl_pinmux = 0;
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for (int i = 0; i < NUM_SERCOMS_PER_PIN; i++) {
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sercom_index = sda->sercom[i].index;
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if (sercom_index >= SERCOM_INST_NUM) {
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continue;
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}
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Sercom* potential_sercom = sercom_insts[sercom_index];
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if (potential_sercom->I2CM.CTRLA.bit.ENABLE != 0 ||
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sda->sercom[i].pad != 0) {
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continue;
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}
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sda_pinmux = PINMUX(sda->number, (i == 0) ? MUX_C : MUX_D);
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for (int j = 0; j < NUM_SERCOMS_PER_PIN; j++) {
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if (sercom_index == scl->sercom[j].index &&
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scl->sercom[j].pad == 1) {
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scl_pinmux = PINMUX(scl->number, (j == 0) ? MUX_C : MUX_D);
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sercom = potential_sercom;
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break;
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}
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}
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if (sercom != NULL) {
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break;
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}
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}
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uint32_t sda_pinmux, scl_pinmux;
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Sercom* sercom = samd_i2c_get_sercom(scl, sda, &sercom_index, &sda_pinmux, &scl_pinmux);
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if (sercom == NULL) {
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mp_raise_ValueError(translate("Invalid pins"));
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}
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@ -41,4 +41,7 @@ typedef struct {
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uint8_t sda_pin;
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} busio_i2c_obj_t;
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extern Sercom *samd_i2c_get_sercom(const mcu_pin_obj_t* scl, const mcu_pin_obj_t* sda,
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uint8_t *sercom_index, uint32_t *sda_pinmux, uint32_t *scl_pinmux);
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#endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_BUSIO_I2C_H
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@ -0,0 +1,252 @@
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Noralf Trønnes
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/i2cslave/I2CSlave.h"
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#include "common-hal/busio/I2C.h"
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#include "lib/utils/interrupt_char.h"
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#include "py/mperrno.h"
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#include "py/mphal.h"
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#include "py/runtime.h"
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#include "hal/include/hal_gpio.h"
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#include "peripherals/samd/sercom.h"
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void common_hal_i2cslave_i2c_slave_construct(i2cslave_i2c_slave_obj_t *self,
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const mcu_pin_obj_t *scl, const mcu_pin_obj_t *sda,
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uint8_t *addresses, unsigned int num_addresses, bool smbus) {
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uint8_t sercom_index;
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uint32_t sda_pinmux, scl_pinmux;
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Sercom *sercom = samd_i2c_get_sercom(scl, sda, &sercom_index, &sda_pinmux, &scl_pinmux);
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if (sercom == NULL) {
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mp_raise_ValueError("Invalid pins");
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}
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self->sercom = sercom;
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gpio_set_pin_function(sda->number, GPIO_PIN_FUNCTION_OFF);
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gpio_set_pin_function(scl->number, GPIO_PIN_FUNCTION_OFF);
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gpio_set_pin_function(sda->number, sda_pinmux);
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gpio_set_pin_function(scl->number, scl_pinmux);
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self->sda_pin = sda->number;
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self->scl_pin = scl->number;
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claim_pin(sda);
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claim_pin(scl);
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samd_peripherals_sercom_clock_init(sercom, sercom_index);
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sercom->I2CS.CTRLA.bit.SWRST = 1;
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while (sercom->I2CS.CTRLA.bit.SWRST || sercom->I2CS.SYNCBUSY.bit.SWRST) {}
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sercom->I2CS.CTRLB.bit.AACKEN = 0; // Automatic acknowledge is disabled.
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if (num_addresses == 1) {
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sercom->I2CS.CTRLB.bit.AMODE = 0x0; // MASK
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sercom->I2CS.ADDR.bit.ADDR = addresses[0];
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sercom->I2CS.ADDR.bit.ADDRMASK = 0x00; // Match exact address
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} else if (num_addresses == 2) {
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sercom->I2CS.CTRLB.bit.AMODE = 0x1; // 2_ADDRS
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sercom->I2CS.ADDR.bit.ADDR = addresses[0];
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sercom->I2CS.ADDR.bit.ADDRMASK = addresses[1];
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} else {
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uint32_t combined = 0; // all addresses OR'ed
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uint32_t differ = 0; // bits that differ between addresses
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for (unsigned int i = 0; i < num_addresses; i++) {
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combined |= addresses[i];
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differ |= addresses[0] ^ addresses[i];
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}
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sercom->I2CS.CTRLB.bit.AMODE = 0x0; // MASK
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sercom->I2CS.ADDR.bit.ADDR = combined;
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sercom->I2CS.ADDR.bit.ADDRMASK = differ;
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}
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self->addresses = addresses;
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self->num_addresses = num_addresses;
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if (smbus) {
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sercom->I2CS.CTRLA.bit.LOWTOUTEN = 1; // Errata 12003
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sercom->I2CS.CTRLA.bit.SEXTTOEN = 1; // Slave SCL Low Extend/Cumulative Time-Out 25ms
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}
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sercom->I2CS.CTRLA.bit.SCLSM = 0; // Clock stretch before ack
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sercom->I2CS.CTRLA.bit.MODE = 0x04; // Slave mode
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sercom->I2CS.CTRLA.bit.ENABLE = 1;
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}
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bool common_hal_i2cslave_i2c_slave_deinited(i2cslave_i2c_slave_obj_t *self) {
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return self->sda_pin == NO_PIN;
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}
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void common_hal_i2cslave_i2c_slave_deinit(i2cslave_i2c_slave_obj_t *self) {
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if (common_hal_i2cslave_i2c_slave_deinited(self)) {
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return;
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}
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self->sercom->I2CS.CTRLA.bit.ENABLE = 0;
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reset_pin(self->sda_pin);
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reset_pin(self->scl_pin);
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self->sda_pin = NO_PIN;
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self->scl_pin = NO_PIN;
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}
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static int i2c_slave_check_error(i2cslave_i2c_slave_obj_t *self, bool raise) {
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if (!self->sercom->I2CS.INTFLAG.bit.ERROR) {
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return 0;
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}
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int err = MP_EIO;
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if (self->sercom->I2CS.STATUS.bit.LOWTOUT || self->sercom->I2CS.STATUS.bit.SEXTTOUT) {
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err = MP_ETIMEDOUT;
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}
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self->sercom->I2CS.INTFLAG.reg = SERCOM_I2CS_INTFLAG_ERROR; // Clear flag
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if (raise) {
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mp_raise_OSError(err);
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}
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return -err;
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}
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int common_hal_i2cslave_i2c_slave_is_addressed(i2cslave_i2c_slave_obj_t *self, uint8_t *address, bool *is_read, bool *is_restart)
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{
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int err = i2c_slave_check_error(self, false);
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if (err) {
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return err;
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}
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if (!self->sercom->I2CS.INTFLAG.bit.AMATCH) {
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return 0;
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}
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self->writing = false;
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*address = self->sercom->I2CS.DATA.reg >> 1;
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*is_read = self->sercom->I2CS.STATUS.bit.DIR;
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*is_restart = self->sercom->I2CS.STATUS.bit.SR;
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for (unsigned int i = 0; i < self->num_addresses; i++) {
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if (*address == self->addresses[i]) {
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common_hal_i2cslave_i2c_slave_ack(self, true);
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return 1;
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}
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}
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// This should clear AMATCH, but it doesn't...
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common_hal_i2cslave_i2c_slave_ack(self, false);
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return 0;
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}
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int common_hal_i2cslave_i2c_slave_read_byte(i2cslave_i2c_slave_obj_t *self, uint8_t *data) {
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for (int t = 0; t < 100 && !self->sercom->I2CS.INTFLAG.reg; t++) {
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mp_hal_delay_us(10);
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}
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i2c_slave_check_error(self, true);
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if (!self->sercom->I2CS.INTFLAG.bit.DRDY ||
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self->sercom->I2CS.INTFLAG.bit.PREC ||
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self->sercom->I2CS.INTFLAG.bit.AMATCH) {
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return 0;
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}
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*data = self->sercom->I2CS.DATA.reg;
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return 1;
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}
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int common_hal_i2cslave_i2c_slave_write_byte(i2cslave_i2c_slave_obj_t *self, uint8_t data) {
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for (int t = 0; !self->sercom->I2CS.INTFLAG.reg && t < 100; t++) {
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mp_hal_delay_us(10);
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}
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i2c_slave_check_error(self, true);
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if (self->sercom->I2CS.INTFLAG.bit.PREC) {
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return 0;
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}
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// RXNACK can carry over from the previous transfer
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if (self->writing && self->sercom->I2CS.STATUS.bit.RXNACK) {
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return 0;
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}
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self->writing = true;
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if (!self->sercom->I2CS.INTFLAG.bit.DRDY) {
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return 0;
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}
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self->sercom->I2CS.DATA.bit.DATA = data; // Send data
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return 1;
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}
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void common_hal_i2cslave_i2c_slave_ack(i2cslave_i2c_slave_obj_t *self, bool ack) {
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self->sercom->I2CS.CTRLB.bit.ACKACT = !ack;
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self->sercom->I2CS.CTRLB.bit.CMD = 0x03;
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}
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void common_hal_i2cslave_i2c_slave_close(i2cslave_i2c_slave_obj_t *self) {
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for (int t = 0; !self->sercom->I2CS.INTFLAG.reg && t < 100; t++) {
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mp_hal_delay_us(10);
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}
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if (self->sercom->I2CS.INTFLAG.bit.AMATCH || !self->sercom->I2CS.STATUS.bit.CLKHOLD) {
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return;
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}
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if (!self->sercom->I2CS.STATUS.bit.DIR) {
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common_hal_i2cslave_i2c_slave_ack(self, false);
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} else {
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int i = 0;
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while (self->sercom->I2CS.INTFLAG.reg == SERCOM_I2CS_INTFLAG_DRDY) {
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if (mp_hal_is_interrupted()) {
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return;
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}
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self->sercom->I2CS.DATA.bit.DATA = 0xff; // Send dummy byte
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// Wait for a result (if any).
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// test_byte_word.py::TestWord::test_write_seq leaves us with no INTFLAGs set in some of the tests
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for (int t = 0; !self->sercom->I2CS.INTFLAG.reg && t < 100; t++) {
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mp_hal_delay_us(10);
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}
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if (++i > 1000) { // Avoid getting stuck "forever"
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mp_raise_OSError(MP_EIO);
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}
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}
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}
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if (self->sercom->I2CS.INTFLAG.bit.AMATCH) {
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return;
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}
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if (self->sercom->I2CS.STATUS.bit.CLKHOLD) {
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// Unable to release the clock.
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// The slave might have to be re-initialized to get unstuck.
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mp_raise_OSError(MP_EIO);
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}
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}
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@ -0,0 +1,45 @@
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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
|
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*
|
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* Copyright (c) 2018 Noralf Trønnes
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*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifndef MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_BUSIO_I2C_SLAVE_H
|
||||
#define MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_BUSIO_I2C_SLAVE_H
|
||||
|
||||
#include "common-hal/microcontroller/Pin.h"
|
||||
#include "py/obj.h"
|
||||
|
||||
typedef struct {
|
||||
mp_obj_base_t base;
|
||||
|
||||
uint8_t *addresses;
|
||||
unsigned int num_addresses;
|
||||
|
||||
Sercom *sercom;
|
||||
uint8_t scl_pin;
|
||||
uint8_t sda_pin;
|
||||
bool writing;
|
||||
} i2cslave_i2c_slave_obj_t;
|
||||
|
||||
#endif // MICROPY_INCLUDED_ATMEL_SAMD_COMMON_HAL_BUSIO_I2C_SLAVE_H
|
||||
|
|
@ -0,0 +1 @@
|
|||
// No i2cslave module functions.
|
||||
|
|
@ -174,6 +174,7 @@ extern const struct _mp_obj_module_t digitalio_module;
|
|||
extern const struct _mp_obj_module_t pulseio_module;
|
||||
extern const struct _mp_obj_module_t busio_module;
|
||||
extern const struct _mp_obj_module_t board_module;
|
||||
extern const struct _mp_obj_module_t i2cslave_module;
|
||||
extern const struct _mp_obj_module_t math_module;
|
||||
extern const struct _mp_obj_module_t os_module;
|
||||
extern const struct _mp_obj_module_t random_module;
|
||||
|
|
@ -225,11 +226,18 @@ extern const struct _mp_obj_module_t usb_hid_module;
|
|||
#define AUDIOIO_MODULE { MP_OBJ_NEW_QSTR(MP_QSTR_audioio), (mp_obj_t)&audioio_module },
|
||||
#endif
|
||||
|
||||
#ifdef CIRCUITPY_I2CSLAVE
|
||||
#define I2CSLAVE_MODULE { MP_OBJ_NEW_QSTR(MP_QSTR_i2cslave), (mp_obj_t)&i2cslave_module },
|
||||
#else
|
||||
#define I2CSLAVE_MODULE
|
||||
#endif
|
||||
|
||||
#ifndef EXTRA_BUILTIN_MODULES
|
||||
#define EXTRA_BUILTIN_MODULES \
|
||||
AUDIOIO_MODULE \
|
||||
AUDIOBUSIO_MODULE \
|
||||
{ MP_OBJ_NEW_QSTR(MP_QSTR_bitbangio), (mp_obj_t)&bitbangio_module }, \
|
||||
I2CSLAVE_MODULE \
|
||||
{ MP_OBJ_NEW_QSTR(MP_QSTR_rotaryio), (mp_obj_t)&rotaryio_module }, \
|
||||
{ MP_OBJ_NEW_QSTR(MP_QSTR_gamepad),(mp_obj_t)&gamepad_module }
|
||||
#endif
|
||||
|
|
|
|||
7
py/obj.h
7
py/obj.h
|
|
@ -295,6 +295,13 @@ typedef struct _mp_rom_obj_t { mp_const_obj_t o; } mp_rom_obj_t;
|
|||
#define MP_DEFINE_CONST_FUN_OBJ_KW(obj_name, n_args_min, fun_name) \
|
||||
const mp_obj_fun_builtin_var_t obj_name = \
|
||||
{{&mp_type_fun_builtin_var}, true, n_args_min, MP_OBJ_FUN_ARGS_MAX, .fun.kw = fun_name}
|
||||
#define MP_DEFINE_CONST_PROP_GET(obj_name, fun_name) \
|
||||
const mp_obj_fun_builtin_fixed_t fun_name##_obj = {{&mp_type_fun_builtin_1}, .fun._1 = fun_name}; \
|
||||
const mp_obj_property_t obj_name = { \
|
||||
.base.type = &mp_type_property, \
|
||||
.proxy = {(mp_obj_t)&fun_name##_obj, \
|
||||
(mp_obj_t)&mp_const_none_obj, \
|
||||
(mp_obj_t)&mp_const_none_obj}, }
|
||||
|
||||
// These macros are used to define constant map/dict objects
|
||||
// You can put "static" in front of the definition to make it local
|
||||
|
|
|
|||
|
|
@ -0,0 +1,450 @@
|
|||
/*
|
||||
* This file is part of the MicroPython project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* Copyright (c) 2018 Noralf Trønnes
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include "shared-bindings/microcontroller/Pin.h"
|
||||
#include "shared-bindings/i2cslave/I2CSlave.h"
|
||||
#include "shared-bindings/time/__init__.h"
|
||||
#include "shared-bindings/util.h"
|
||||
|
||||
#include "lib/utils/buffer_helper.h"
|
||||
#include "lib/utils/context_manager_helpers.h"
|
||||
#include "lib/utils/interrupt_char.h"
|
||||
|
||||
#include "py/mperrno.h"
|
||||
#include "py/mphal.h"
|
||||
#include "py/obj.h"
|
||||
#include "py/objproperty.h"
|
||||
#include "py/runtime.h"
|
||||
|
||||
STATIC mp_obj_t mp_obj_new_i2cslave_i2c_slave_request(i2cslave_i2c_slave_obj_t *slave, uint8_t address, bool is_read, bool is_restart) {
|
||||
i2cslave_i2c_slave_request_obj_t *self = m_new_obj(i2cslave_i2c_slave_request_obj_t);
|
||||
self->base.type = &i2cslave_i2c_slave_request_type;
|
||||
self->slave = slave;
|
||||
self->address = address;
|
||||
self->is_read = is_read;
|
||||
self->is_restart = is_restart;
|
||||
return (mp_obj_t)self;
|
||||
}
|
||||
|
||||
//| .. currentmodule:: i2cslave
|
||||
//|
|
||||
//| :class:`I2CSlave` --- Two wire serial protocol slave
|
||||
//| ----------------------------------------------------
|
||||
//|
|
||||
//| .. class:: I2CSlave(scl, sda, addresses, smbus=False)
|
||||
//|
|
||||
//| I2C is a two-wire protocol for communicating between devices.
|
||||
//| This implements the slave side.
|
||||
//|
|
||||
//| :param ~microcontroller.Pin scl: The clock pin
|
||||
//| :param ~microcontroller.Pin sda: The data pin
|
||||
//| :param tuple addresses: The I2C addresses to respond to (how many is hw dependent).
|
||||
//| :param bool smbus: Use SMBUS timings if the hardware supports it
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *pos_args) {
|
||||
mp_arg_check_num(n_args, n_kw, 0, MP_OBJ_FUN_ARGS_MAX, true);
|
||||
i2cslave_i2c_slave_obj_t *self = m_new_obj(i2cslave_i2c_slave_obj_t);
|
||||
self->base.type = &i2cslave_i2c_slave_type;
|
||||
mp_map_t kw_args;
|
||||
mp_map_init_fixed_table(&kw_args, n_kw, pos_args + n_args);
|
||||
enum { ARG_scl, ARG_sda, ARG_addresses, ARG_smbus };
|
||||
static const mp_arg_t allowed_args[] = {
|
||||
{ MP_QSTR_scl, MP_ARG_REQUIRED | MP_ARG_OBJ },
|
||||
{ MP_QSTR_sda, MP_ARG_REQUIRED | MP_ARG_OBJ },
|
||||
{ MP_QSTR_addresses, MP_ARG_REQUIRED | MP_ARG_OBJ },
|
||||
{ MP_QSTR_smbus, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
|
||||
};
|
||||
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
||||
mp_arg_parse_all(n_args, pos_args, &kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
||||
|
||||
assert_pin(args[ARG_scl].u_obj, false);
|
||||
assert_pin(args[ARG_sda].u_obj, false);
|
||||
const mcu_pin_obj_t* scl = MP_OBJ_TO_PTR(args[ARG_scl].u_obj);
|
||||
assert_pin_free(scl);
|
||||
const mcu_pin_obj_t* sda = MP_OBJ_TO_PTR(args[ARG_sda].u_obj);
|
||||
assert_pin_free(sda);
|
||||
|
||||
mp_obj_iter_buf_t iter_buf;
|
||||
mp_obj_t iterable = mp_getiter(args[ARG_addresses].u_obj, &iter_buf);
|
||||
mp_obj_t item;
|
||||
uint8_t *addresses = NULL;
|
||||
unsigned int i = 0;
|
||||
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
|
||||
mp_int_t value;
|
||||
if (!mp_obj_get_int_maybe(item, &value)) {
|
||||
mp_raise_TypeError("can't convert address to int");
|
||||
}
|
||||
if (value < 0x00 || value > 0x7f) {
|
||||
mp_raise_ValueError("address out of bounds");
|
||||
}
|
||||
addresses = m_renew(uint8_t, addresses, i, i + 1);
|
||||
addresses[i++] = value;
|
||||
}
|
||||
if (i == 0) {
|
||||
mp_raise_ValueError("addresses is empty");
|
||||
}
|
||||
|
||||
common_hal_i2cslave_i2c_slave_construct(self, scl, sda, addresses, i, args[ARG_smbus].u_bool);
|
||||
return (mp_obj_t)self;
|
||||
}
|
||||
|
||||
//| .. method:: deinit()
|
||||
//|
|
||||
//| Releases control of the underlying hardware so other classes can use it.
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_obj_deinit(mp_obj_t self_in) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(self_in, &i2cslave_i2c_slave_type));
|
||||
i2cslave_i2c_slave_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
common_hal_i2cslave_i2c_slave_deinit(self);
|
||||
return mp_const_none;
|
||||
}
|
||||
MP_DEFINE_CONST_FUN_OBJ_1(i2cslave_i2c_slave_deinit_obj, i2cslave_i2c_slave_obj_deinit);
|
||||
|
||||
//| .. method:: __enter__()
|
||||
//|
|
||||
//| No-op used in Context Managers.
|
||||
//|
|
||||
// Provided by context manager helper.
|
||||
|
||||
//| .. method:: __exit__()
|
||||
//|
|
||||
//| Automatically deinitializes the hardware on context exit. See
|
||||
//| :ref:`lifetime-and-contextmanagers` for more info.
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_obj___exit__(size_t n_args, const mp_obj_t *args) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(args[0], &i2cslave_i2c_slave_type));
|
||||
i2cslave_i2c_slave_obj_t *self = MP_OBJ_TO_PTR(args[0]);
|
||||
common_hal_i2cslave_i2c_slave_deinit(self);
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2cslave_i2c_slave___exit___obj, 4, 4, i2cslave_i2c_slave_obj___exit__);
|
||||
|
||||
//| .. method:: request(timeout=-1)
|
||||
//|
|
||||
//| Wait for an I2C request from a master.
|
||||
//|
|
||||
//| :param float timeout: Timeout in seconds. Zero means wait forever, a negative value means check once
|
||||
//| :return: I2C Slave Request or None if timeout=-1 and there's no request
|
||||
//| :rtype: ~i2cslave.I2CSlaveRequest
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(pos_args[0], &i2cslave_i2c_slave_type));
|
||||
i2cslave_i2c_slave_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
|
||||
raise_error_if_deinited(common_hal_i2cslave_i2c_slave_deinited(self));
|
||||
enum { ARG_timeout };
|
||||
static const mp_arg_t allowed_args[] = {
|
||||
{ MP_QSTR_timeout, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} },
|
||||
};
|
||||
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
||||
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
||||
|
||||
#if MICROPY_PY_BUILTINS_FLOAT
|
||||
float f = mp_obj_get_float(args[ARG_timeout].u_obj) * 1000;
|
||||
int timeout_ms = (int)f;
|
||||
#else
|
||||
int timeout_ms = mp_obj_get_int(args[ARG_timeout].u_obj) * 1000;
|
||||
#endif
|
||||
|
||||
bool forever = false;
|
||||
uint64_t timeout_end = 0;
|
||||
if (timeout_ms == 0) {
|
||||
forever = true;
|
||||
} else if (timeout_ms > 0) {
|
||||
timeout_end = common_hal_time_monotonic() + timeout_ms;
|
||||
}
|
||||
|
||||
int last_error = 0;
|
||||
|
||||
do {
|
||||
uint8_t address;
|
||||
bool is_read;
|
||||
bool is_restart;
|
||||
|
||||
MICROPY_VM_HOOK_LOOP
|
||||
if (mp_hal_is_interrupted()) {
|
||||
return mp_const_none;
|
||||
}
|
||||
|
||||
int status = common_hal_i2cslave_i2c_slave_is_addressed(self, &address, &is_read, &is_restart);
|
||||
if (status < 0) {
|
||||
// On error try one more time before bailing out
|
||||
if (last_error) {
|
||||
mp_raise_OSError(last_error);
|
||||
}
|
||||
last_error = -status;
|
||||
mp_hal_delay_ms(10);
|
||||
continue;
|
||||
}
|
||||
|
||||
last_error = 0;
|
||||
|
||||
if (status == 0) {
|
||||
mp_hal_delay_us(10);
|
||||
continue;
|
||||
}
|
||||
|
||||
return mp_obj_new_i2cslave_i2c_slave_request(self, address, is_read, is_restart);
|
||||
} while (forever || common_hal_time_monotonic() < timeout_end);
|
||||
|
||||
if (timeout_ms > 0) {
|
||||
mp_raise_OSError(MP_ETIMEDOUT);
|
||||
}
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(i2cslave_i2c_slave_request_obj, 1, i2cslave_i2c_slave_request);
|
||||
|
||||
STATIC const mp_rom_map_elem_t i2cslave_i2c_slave_locals_dict_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&i2cslave_i2c_slave_deinit_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&i2cslave_i2c_slave___exit___obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_request), MP_ROM_PTR(&i2cslave_i2c_slave_request_obj) },
|
||||
|
||||
};
|
||||
|
||||
STATIC MP_DEFINE_CONST_DICT(i2cslave_i2c_slave_locals_dict, i2cslave_i2c_slave_locals_dict_table);
|
||||
|
||||
const mp_obj_type_t i2cslave_i2c_slave_type = {
|
||||
{ &mp_type_type },
|
||||
.name = MP_QSTR_I2CSlave,
|
||||
.make_new = i2cslave_i2c_slave_make_new,
|
||||
.locals_dict = (mp_obj_dict_t*)&i2cslave_i2c_slave_locals_dict,
|
||||
};
|
||||
|
||||
|
||||
//| :class:`I2CSlaveRequest` --- I2C Slave Request
|
||||
//| ----------------------------------------------
|
||||
//|
|
||||
//| .. class:: I2CSlaveRequest(slave, address, is_read, is_restart)
|
||||
//|
|
||||
//| I2C transfer request from a master.
|
||||
//| This cannot be instantiated directly, but is returned by :py:meth:`I2CSlave.request`.
|
||||
//|
|
||||
//| :param ~i2cslave.I2CSlave slave: The I2C Slave receiving this request
|
||||
//| :param int address: I2C address
|
||||
//| :param bool is_read: I2C Master read request
|
||||
//| :param bool is_restart: Repeated Start Condition
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
||||
mp_arg_check_num(n_args, n_kw, 4, 4, false);
|
||||
return mp_obj_new_i2cslave_i2c_slave_request(args[0], mp_obj_get_int(args[1]), mp_obj_is_true(args[2]), mp_obj_is_true(args[3]));
|
||||
}
|
||||
|
||||
//| .. method:: __enter__()
|
||||
//|
|
||||
//| No-op used in Context Managers.
|
||||
//|
|
||||
// Provided by context manager helper.
|
||||
|
||||
//| .. method:: __exit__()
|
||||
//|
|
||||
//| Close the request.
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_obj___exit__(size_t n_args, const mp_obj_t *args) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(args[0], &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(args[0]);
|
||||
common_hal_i2cslave_i2c_slave_close(self->slave);
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2cslave_i2c_slave_request___exit___obj, 4, 4, i2cslave_i2c_slave_request_obj___exit__);
|
||||
|
||||
//| .. attribute:: address
|
||||
//|
|
||||
//| The I2C address of the request.
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_get_address(mp_obj_t self_in) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(self_in, &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
return mp_obj_new_int(self->address);
|
||||
}
|
||||
MP_DEFINE_CONST_PROP_GET(i2cslave_i2c_slave_request_address_obj, i2cslave_i2c_slave_request_get_address);
|
||||
|
||||
//| .. attribute:: is_read
|
||||
//|
|
||||
//| The I2C master is reading from the device.
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_get_is_read(mp_obj_t self_in) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(self_in, &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
return mp_obj_new_bool(self->is_read);
|
||||
}
|
||||
MP_DEFINE_CONST_PROP_GET(i2cslave_i2c_slave_request_is_read_obj, i2cslave_i2c_slave_request_get_is_read);
|
||||
|
||||
//| .. attribute:: is_restart
|
||||
//|
|
||||
//| Is Repeated Start Condition.
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_get_is_restart(mp_obj_t self_in) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(self_in, &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
return mp_obj_new_bool(self->is_restart);
|
||||
}
|
||||
MP_DEFINE_CONST_PROP_GET(i2cslave_i2c_slave_request_is_restart_obj, i2cslave_i2c_slave_request_get_is_restart);
|
||||
|
||||
//| .. method:: read(n=-1, ack=True)
|
||||
//|
|
||||
//| Read data.
|
||||
//| If ack=False, the caller is responsible for calling :py:meth:`I2CSlaveRequest.ack`.
|
||||
//|
|
||||
//| :param int n: Number of bytes to read (negative means all)
|
||||
//| :param bool ack: Whether or not to send an ACK after the n'th byte
|
||||
//| :return: Bytes read
|
||||
//| :rtype: bytearray
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_read(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(pos_args[0], &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
|
||||
enum { ARG_n, ARG_ack };
|
||||
static const mp_arg_t allowed_args[] = {
|
||||
{ MP_QSTR_n, MP_ARG_INT, {.u_int = -1} },
|
||||
{ MP_QSTR_ack, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
|
||||
};
|
||||
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
||||
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
||||
|
||||
if (self->is_read) {
|
||||
mp_raise_OSError(MP_EACCES);
|
||||
}
|
||||
|
||||
int n = args[ARG_n].u_int;
|
||||
if (n == 0) {
|
||||
return mp_obj_new_bytearray(0, NULL);
|
||||
}
|
||||
bool ack = args[ARG_ack].u_bool;
|
||||
|
||||
int i = 0;
|
||||
uint8_t *buffer = NULL;
|
||||
uint64_t timeout_end = common_hal_time_monotonic() + 10 * 1000;
|
||||
while (common_hal_time_monotonic() < timeout_end) {
|
||||
MICROPY_VM_HOOK_LOOP
|
||||
if (mp_hal_is_interrupted()) {
|
||||
break;
|
||||
}
|
||||
|
||||
uint8_t data;
|
||||
int num = common_hal_i2cslave_i2c_slave_read_byte(self->slave, &data);
|
||||
if (num == 0) {
|
||||
break;
|
||||
}
|
||||
|
||||
buffer = m_renew(uint8_t, buffer, i, i + 1);
|
||||
buffer[i++] = data;
|
||||
if (i == n) {
|
||||
if (ack) {
|
||||
common_hal_i2cslave_i2c_slave_ack(self->slave, true);
|
||||
}
|
||||
break;
|
||||
}
|
||||
common_hal_i2cslave_i2c_slave_ack(self->slave, true);
|
||||
}
|
||||
|
||||
return mp_obj_new_bytearray(i, buffer);
|
||||
}
|
||||
MP_DEFINE_CONST_FUN_OBJ_KW(i2cslave_i2c_slave_request_read_obj, 1, i2cslave_i2c_slave_request_read);
|
||||
|
||||
//| .. method:: write(buffer)
|
||||
//|
|
||||
//| Write the data contained in buffer.
|
||||
//|
|
||||
//| :param bytearray buffer: Write out the data in this buffer
|
||||
//| :return: Number of bytes written
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_write(mp_obj_t self_in, mp_obj_t buf_in) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(self_in, &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
|
||||
if (!self->is_read) {
|
||||
mp_raise_OSError(MP_EACCES);
|
||||
}
|
||||
|
||||
mp_buffer_info_t bufinfo;
|
||||
mp_get_buffer_raise(buf_in, &bufinfo, MP_BUFFER_READ);
|
||||
|
||||
for (size_t i = 0; i < bufinfo.len; i++) {
|
||||
MICROPY_VM_HOOK_LOOP
|
||||
if (mp_hal_is_interrupted()) {
|
||||
break;
|
||||
}
|
||||
|
||||
int num = common_hal_i2cslave_i2c_slave_write_byte(self->slave, ((uint8_t *)(bufinfo.buf))[i]);
|
||||
if (num == 0) {
|
||||
return mp_obj_new_int(i);
|
||||
}
|
||||
}
|
||||
|
||||
return mp_obj_new_int(bufinfo.len);
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_2(i2cslave_i2c_slave_request_write_obj, i2cslave_i2c_slave_request_write);
|
||||
|
||||
//| .. method:: ack(ack=True)
|
||||
//|
|
||||
//| Acknowledge or Not Acknowledge last byte received.
|
||||
//| Use together with :py:meth:`I2CSlaveRequest.read` ack=False.
|
||||
//|
|
||||
//| :param bool ack: Whether to send an ACK or NACK
|
||||
//|
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_ack(uint n_args, const mp_obj_t *args) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(args[0], &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(args[0]);
|
||||
bool ack = (n_args == 1) ? true : mp_obj_is_true(args[1]);
|
||||
|
||||
if (self->is_read) {
|
||||
mp_raise_OSError(MP_EACCES);
|
||||
}
|
||||
|
||||
common_hal_i2cslave_i2c_slave_ack(self->slave, ack);
|
||||
return mp_const_none;
|
||||
}
|
||||
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2cslave_i2c_slave_request_ack_obj, 1, 2, i2cslave_i2c_slave_request_ack);
|
||||
|
||||
STATIC mp_obj_t i2cslave_i2c_slave_request_close(mp_obj_t self_in) {
|
||||
mp_check_self(MP_OBJ_IS_TYPE(self_in, &i2cslave_i2c_slave_request_type));
|
||||
i2cslave_i2c_slave_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
||||
|
||||
common_hal_i2cslave_i2c_slave_close(self->slave);
|
||||
return mp_const_none;
|
||||
}
|
||||
STATIC MP_DEFINE_CONST_FUN_OBJ_1(i2cslave_i2c_slave_request_close_obj, i2cslave_i2c_slave_request_close);
|
||||
|
||||
STATIC const mp_rom_map_elem_t i2cslave_i2c_slave_request_locals_dict_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&i2cslave_i2c_slave_request___exit___obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_address), MP_ROM_PTR(&i2cslave_i2c_slave_request_address_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_is_read), MP_ROM_PTR(&i2cslave_i2c_slave_request_is_read_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_is_restart), MP_ROM_PTR(&i2cslave_i2c_slave_request_is_restart_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&i2cslave_i2c_slave_request_read_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&i2cslave_i2c_slave_request_write_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_ack), MP_ROM_PTR(&i2cslave_i2c_slave_request_ack_obj) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&i2cslave_i2c_slave_request_close_obj) },
|
||||
};
|
||||
|
||||
STATIC MP_DEFINE_CONST_DICT(i2cslave_i2c_slave_request_locals_dict, i2cslave_i2c_slave_request_locals_dict_table);
|
||||
|
||||
const mp_obj_type_t i2cslave_i2c_slave_request_type = {
|
||||
{ &mp_type_type },
|
||||
.name = MP_QSTR_I2CSlaveRequest,
|
||||
.make_new = i2cslave_i2c_slave_request_make_new,
|
||||
.locals_dict = (mp_obj_dict_t*)&i2cslave_i2c_slave_request_locals_dict,
|
||||
};
|
||||
|
|
@ -0,0 +1,60 @@
|
|||
/*
|
||||
* This file is part of the MicroPython project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* Copyright (c) 2018 Noralf Trønnes
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_BUSIO_I2C_SLAVE_H
|
||||
#define MICROPY_INCLUDED_SHARED_BINDINGS_BUSIO_I2C_SLAVE_H
|
||||
|
||||
#include "py/obj.h"
|
||||
|
||||
#include "common-hal/microcontroller/Pin.h"
|
||||
#include "common-hal/i2cslave/I2CSlave.h"
|
||||
|
||||
typedef struct {
|
||||
mp_obj_base_t base;
|
||||
i2cslave_i2c_slave_obj_t *slave;
|
||||
uint16_t address;
|
||||
bool is_read;
|
||||
bool is_restart;
|
||||
} i2cslave_i2c_slave_request_obj_t;
|
||||
|
||||
extern const mp_obj_type_t i2cslave_i2c_slave_request_type;
|
||||
|
||||
extern const mp_obj_type_t i2cslave_i2c_slave_type;
|
||||
|
||||
extern void common_hal_i2cslave_i2c_slave_construct(i2cslave_i2c_slave_obj_t *self,
|
||||
const mcu_pin_obj_t* scl, const mcu_pin_obj_t* sda,
|
||||
uint8_t *addresses, unsigned int num_addresses, bool smbus);
|
||||
extern void common_hal_i2cslave_i2c_slave_deinit(i2cslave_i2c_slave_obj_t *self);
|
||||
extern bool common_hal_i2cslave_i2c_slave_deinited(i2cslave_i2c_slave_obj_t *self);
|
||||
|
||||
extern int common_hal_i2cslave_i2c_slave_is_addressed(i2cslave_i2c_slave_obj_t *self,
|
||||
uint8_t *address, bool *is_read, bool *is_restart);
|
||||
extern int common_hal_i2cslave_i2c_slave_read_byte(i2cslave_i2c_slave_obj_t *self, uint8_t *data);
|
||||
extern int common_hal_i2cslave_i2c_slave_write_byte(i2cslave_i2c_slave_obj_t *self, uint8_t data);
|
||||
extern void common_hal_i2cslave_i2c_slave_ack(i2cslave_i2c_slave_obj_t *self, bool ack);
|
||||
extern void common_hal_i2cslave_i2c_slave_close(i2cslave_i2c_slave_obj_t *self);
|
||||
|
||||
#endif // MICROPY_INCLUDED_SHARED_BINDINGS_BUSIO_I2C_SLAVE_H
|
||||
|
|
@ -0,0 +1,117 @@
|
|||
/*
|
||||
* This file is part of the MicroPython project, http://micropython.org/
|
||||
*
|
||||
* The MIT License (MIT)
|
||||
*
|
||||
* Copyright (c) 2018 Noralf Trønnes
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||||
* of this software and associated documentation files (the "Software"), to deal
|
||||
* in the Software without restriction, including without limitation the rights
|
||||
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||||
* copies of the Software, and to permit persons to whom the Software is
|
||||
* furnished to do so, subject to the following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included in
|
||||
* all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||||
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||||
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||||
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||||
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||||
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||||
* THE SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
#include "py/obj.h"
|
||||
#include "py/runtime.h"
|
||||
|
||||
#include "shared-bindings/microcontroller/Pin.h"
|
||||
//#include "shared-bindings/i2cslave/__init__.h"
|
||||
#include "shared-bindings/i2cslave/I2CSlave.h"
|
||||
|
||||
#include "py/runtime.h"
|
||||
|
||||
//| :mod:`i2cslave` --- Two wire serial protocol slave
|
||||
//| ==================================================
|
||||
//|
|
||||
//| .. module:: i2cslave
|
||||
//| :synopsis: Two wire serial protocol slave
|
||||
//| :platform: SAMD21, SAMD51
|
||||
//|
|
||||
//| The `i2cslave` module contains classes to support a I2C slave.
|
||||
//|
|
||||
//| Classes
|
||||
//|
|
||||
//| .. toctree::
|
||||
//| :maxdepth: 3
|
||||
//|
|
||||
//| I2CSlave
|
||||
//|
|
||||
//| Example emulating 2 devices::
|
||||
//|
|
||||
//| import board
|
||||
//| from i2cslave import I2CSlave
|
||||
//|
|
||||
//| regs = [0] * 16
|
||||
//| index = 0
|
||||
//|
|
||||
//| with I2CSlave(board.SCL, board.SDA, (0x40, 0x41)) as slave:
|
||||
//| while True:
|
||||
//| r = slave.request()
|
||||
//| if not r:
|
||||
//| # Maybe do some housekeeping
|
||||
//| continue
|
||||
//| with r: # Closes the transfer if necessary by sending a NACK or feeding the master dummy bytes
|
||||
//| if r.address == 0x40:
|
||||
//| if not r.is_read: # Master write which is Slave read
|
||||
//| b = r.read(1)
|
||||
//| if not b or b[0] > 15:
|
||||
//| break
|
||||
//| index = b[0]
|
||||
//| b = r.read(1)
|
||||
//| if b:
|
||||
//| regs[index] = b[0]
|
||||
//| elif r.is_restart: # Combined transfer: This is the Master read message
|
||||
//| n = r.write(bytes([regs[index]]))
|
||||
//| #else:
|
||||
//| # A read transfer is not supported in this example
|
||||
//| # If the Master tries, it will get 0xff byte(s) by the ctx manager (r.close())
|
||||
//| elif r.address == 0x41:
|
||||
//| if not r.is_read:
|
||||
//| b = r.read(1)
|
||||
//| if b and b[0] == 0xde:
|
||||
//| # do something
|
||||
//| pass
|
||||
//|
|
||||
//| This example sets up an I2C slave that can be accessed from Linux like this::
|
||||
//|
|
||||
//| $ i2cget -y 1 0x40 0x01
|
||||
//| 0x00
|
||||
//| $ i2cset -y 1 0x40 0x01 0xaa
|
||||
//| $ i2cget -y 1 0x40 0x01
|
||||
//| 0xaa
|
||||
//|
|
||||
//| .. warning::
|
||||
//| I2CSlave makes use of clock stretching in order to slow down the master.
|
||||
//| Make sure the I2C master supports this.
|
||||
//|
|
||||
//| Raspberry Pi in particular does not support this with its I2C hw block.
|
||||
//| This can be worked around by using the ``i2c-gpio`` bit banging driver.
|
||||
//| Since the RPi firmware uses the hw i2c, it's not possible to emulate a HAT eeprom.
|
||||
//|
|
||||
|
||||
STATIC const mp_rom_map_elem_t i2cslave_module_globals_table[] = {
|
||||
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_i2cslave) },
|
||||
{ MP_ROM_QSTR(MP_QSTR_I2CSlave), MP_ROM_PTR(&i2cslave_i2c_slave_type) },
|
||||
};
|
||||
|
||||
STATIC MP_DEFINE_CONST_DICT(i2cslave_module_globals, i2cslave_module_globals_table);
|
||||
|
||||
const mp_obj_module_t i2cslave_module = {
|
||||
.base = { &mp_type_module },
|
||||
.globals = (mp_obj_dict_t*)&i2cslave_module_globals,
|
||||
};
|
||||
|
|
@ -34,6 +34,7 @@ Module Supported Ports
|
|||
`digitalio` **All Supported**
|
||||
`gamepad` **SAMD Express, nRF**
|
||||
`hashlib` **ESP8266**
|
||||
`i2cslave` **SAMD Express**
|
||||
`math` **All Supported**
|
||||
`microcontroller` **All Supported**
|
||||
`multiterminal` **ESP8266**
|
||||
|
|
|
|||
Loading…
Reference in New Issue