a9dc31a881
This adds a script to generate the peripherals files (except clock). It adds support for the 1015, 1020, 1040, and 1050 EVKs. Some work was started on 1176 but it isn't working. So, the board def is in a separate branch. Fixes #3521. Fixes #2477.
269 lines
8.3 KiB
C
269 lines
8.3 KiB
C
/*
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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) 2016 Scott Shawcroft
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* Copyright (c) 2019 Artur Pacholec
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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 <stdio.h>
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/busio/I2C.h"
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#include "py/mperrno.h"
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#include "py/runtime.h"
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#include "periph.h"
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#include "sdk/drivers/lpi2c/fsl_lpi2c.h"
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#include "sdk/drivers/igpio/fsl_gpio.h"
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#if IMXRT11XX
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#define I2C_CLOCK_FREQ (24000000)
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#else
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#define I2C_CLOCK_FREQ (CLOCK_GetFreq(kCLOCK_Usb1PllClk) / 8 / (1 + CLOCK_GetDiv(kCLOCK_Lpi2cDiv)))
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#endif
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#define IOMUXC_SW_MUX_CTL_PAD_MUX_MODE_ALT5 5U
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// arrays use 0 based numbering: I2C1 is stored at index 0
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STATIC bool reserved_i2c[MP_ARRAY_SIZE(mcu_i2c_banks)];
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STATIC bool never_reset_i2c[MP_ARRAY_SIZE(mcu_i2c_banks)];
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void i2c_reset(void) {
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for (uint i = 0; i < MP_ARRAY_SIZE(mcu_i2c_banks); i++) {
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if (!never_reset_i2c[i]) {
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reserved_i2c[i] = false;
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LPI2C_MasterDeinit(mcu_i2c_banks[i]);
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}
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}
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}
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static void config_periph_pin(const mcu_periph_obj_t *periph) {
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IOMUXC_SetPinMux(
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periph->pin->mux_reg, periph->mux_mode,
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periph->input_reg, periph->input_idx,
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0,
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1);
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IOMUXC_SetPinConfig(0, 0, 0, 0,
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periph->pin->cfg_reg,
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IOMUXC_SW_PAD_CTL_PAD_PUS(3)
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#if IMXRT10XX
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| IOMUXC_SW_PAD_CTL_PAD_HYS(0)
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| IOMUXC_SW_PAD_CTL_PAD_PKE(1)
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| IOMUXC_SW_PAD_CTL_PAD_SPEED(2)
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#endif
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| IOMUXC_SW_PAD_CTL_PAD_PUE(0)
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| IOMUXC_SW_PAD_CTL_PAD_ODE(1)
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| IOMUXC_SW_PAD_CTL_PAD_DSE(4)
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| IOMUXC_SW_PAD_CTL_PAD_SRE(0));
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}
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static void i2c_check_pin_config(const mcu_pin_obj_t *pin, uint32_t pull) {
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IOMUXC_SetPinConfig(0, 0, 0, 0, pin->cfg_reg,
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IOMUXC_SW_PAD_CTL_PAD_PUS(0) // Pulldown
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#if IMXRT10XX
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| IOMUXC_SW_PAD_CTL_PAD_HYS(1)
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| IOMUXC_SW_PAD_CTL_PAD_PKE(1)
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| IOMUXC_SW_PAD_CTL_PAD_SPEED(2)
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#endif
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| IOMUXC_SW_PAD_CTL_PAD_PUE(pull) // 0=nopull (keeper), 1=pull
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| IOMUXC_SW_PAD_CTL_PAD_ODE(0)
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| IOMUXC_SW_PAD_CTL_PAD_DSE(1)
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| IOMUXC_SW_PAD_CTL_PAD_SRE(0));
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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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#if CIRCUITPY_REQUIRE_I2C_PULLUPS
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// Test that the pins are in a high state. (Hopefully indicating they are pulled up.)
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IOMUXC_SetPinMux(sda->mux_reg, IOMUXC_SW_MUX_CTL_PAD_MUX_MODE_ALT5, 0, 0, 0, 0);
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IOMUXC_SetPinMux(scl->mux_reg, IOMUXC_SW_MUX_CTL_PAD_MUX_MODE_ALT5, 0, 0, 0, 0);
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i2c_check_pin_config(sda, 1);
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i2c_check_pin_config(scl, 1);
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const gpio_pin_config_t check_config = { kGPIO_DigitalInput, 0, kGPIO_NoIntmode };
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GPIO_PinInit(sda->gpio, sda->number, &check_config);
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GPIO_PinInit(scl->gpio, scl->number, &check_config);
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common_hal_mcu_delay_us(10);
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i2c_check_pin_config(sda, 0);
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i2c_check_pin_config(scl, 0);
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// We must pull up within 3us to achieve 400khz.
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common_hal_mcu_delay_us(3);
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if (!GPIO_PinRead(sda->gpio, sda->number) || !GPIO_PinRead(scl->gpio, scl->number)) {
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common_hal_reset_pin(sda);
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common_hal_reset_pin(scl);
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mp_raise_RuntimeError(translate("No pull up found on SDA or SCL; check your wiring"));
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}
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#endif
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const uint32_t sda_count = MP_ARRAY_SIZE(mcu_i2c_sda_list);
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const uint32_t scl_count = MP_ARRAY_SIZE(mcu_i2c_scl_list);
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for (uint32_t i = 0; i < sda_count; ++i) {
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if (mcu_i2c_sda_list[i].pin != sda) {
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continue;
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}
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for (uint32_t j = 0; j < scl_count; ++j) {
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if (mcu_i2c_scl_list[j].pin != scl) {
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continue;
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}
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if (mcu_i2c_scl_list[j].bank_idx != mcu_i2c_sda_list[i].bank_idx) {
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continue;
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}
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self->sda = &mcu_i2c_sda_list[i];
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self->scl = &mcu_i2c_scl_list[j];
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break;
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}
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}
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if (self->sda == NULL || self->scl == NULL) {
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raise_ValueError_invalid_pins();
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} else {
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self->i2c = mcu_i2c_banks[self->sda->bank_idx - 1];
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}
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config_periph_pin(self->sda);
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config_periph_pin(self->scl);
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lpi2c_master_config_t config = { 0 };
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LPI2C_MasterGetDefaultConfig(&config);
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config.baudRate_Hz = frequency;
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LPI2C_MasterInit(self->i2c, &config, I2C_CLOCK_FREQ);
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claim_pin(self->sda->pin);
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claim_pin(self->scl->pin);
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}
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void common_hal_busio_i2c_never_reset(busio_i2c_obj_t *self) {
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never_reset_i2c[self->sda->bank_idx - 1] = true;
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common_hal_never_reset_pin(self->sda->pin);
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common_hal_never_reset_pin(self->scl->pin);
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}
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bool common_hal_busio_i2c_deinited(busio_i2c_obj_t *self) {
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return self->sda == NULL;
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}
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void common_hal_busio_i2c_deinit(busio_i2c_obj_t *self) {
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if (common_hal_busio_i2c_deinited(self)) {
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return;
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}
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reserved_i2c[self->sda->bank_idx - 1] = false;
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never_reset_i2c[self->sda->bank_idx - 1] = false;
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LPI2C_MasterDeinit(self->i2c);
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common_hal_reset_pin(self->sda->pin);
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common_hal_reset_pin(self->scl->pin);
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self->sda = NULL;
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self->scl = NULL;
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}
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bool common_hal_busio_i2c_probe(busio_i2c_obj_t *self, uint8_t addr) {
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lpi2c_master_transfer_t xfer = { 0 };
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xfer.slaveAddress = addr;
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return LPI2C_MasterTransferBlocking(self->i2c, &xfer) == kStatus_Success;
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}
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bool common_hal_busio_i2c_try_lock(busio_i2c_obj_t *self) {
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bool grabbed_lock = false;
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// CRITICAL_SECTION_ENTER()
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if (!self->has_lock) {
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grabbed_lock = true;
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self->has_lock = true;
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}
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// CRITICAL_SECTION_LEAVE();
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return grabbed_lock;
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}
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bool common_hal_busio_i2c_has_lock(busio_i2c_obj_t *self) {
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return self->has_lock;
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}
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void common_hal_busio_i2c_unlock(busio_i2c_obj_t *self) {
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self->has_lock = false;
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}
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STATIC uint8_t _common_hal_busio_i2c_write(busio_i2c_obj_t *self, uint16_t addr,
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const uint8_t *data, size_t len, bool transmit_stop_bit) {
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lpi2c_master_transfer_t xfer = { 0 };
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xfer.flags = transmit_stop_bit ? kLPI2C_TransferDefaultFlag : kLPI2C_TransferNoStopFlag;
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xfer.slaveAddress = addr;
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xfer.data = (uint8_t *)data;
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xfer.dataSize = len;
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const status_t status = LPI2C_MasterTransferBlocking(self->i2c, &xfer);
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if (status == kStatus_Success) {
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return 0;
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}
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return MP_EIO;
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}
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uint8_t common_hal_busio_i2c_write(busio_i2c_obj_t *self, uint16_t addr,
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const uint8_t *data, size_t len) {
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return _common_hal_busio_i2c_write(self, addr, data, len, true);
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}
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uint8_t common_hal_busio_i2c_read(busio_i2c_obj_t *self, uint16_t addr,
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uint8_t *data, size_t len) {
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lpi2c_master_transfer_t xfer = { 0 };
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xfer.direction = kLPI2C_Read;
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xfer.slaveAddress = addr;
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xfer.data = data;
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xfer.dataSize = len;
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const status_t status = LPI2C_MasterTransferBlocking(self->i2c, &xfer);
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if (status == kStatus_Success) {
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return 0;
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}
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return MP_EIO;
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}
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uint8_t common_hal_busio_i2c_write_read(busio_i2c_obj_t *self, uint16_t addr,
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uint8_t *out_data, size_t out_len, uint8_t *in_data, size_t in_len) {
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uint8_t result = _common_hal_busio_i2c_write(self, addr, out_data, out_len, false);
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if (result != 0) {
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return result;
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}
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return common_hal_busio_i2c_read(self, addr, in_data, in_len);
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}
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