109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
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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) 2021 Scott Shawcroft for Adafruit Industries
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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 "py/mperrno.h"
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#include "py/mphal.h"
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#include "shared-bindings/busio/I2C.h"
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#include "py/runtime.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#define NO_PIN 0xff
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// One second
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#define BUS_TIMEOUT_US 1000000
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STATIC bool never_reset_i2c[2];
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// STATIC i2c_inst_t *i2c[2] = {i2c0, i2c1};
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void reset_i2c(void) {
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for (size_t i = 0; i < 2; i++) {
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if (never_reset_i2c[i]) {
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continue;
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}
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}
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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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}
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bool common_hal_busio_i2c_deinited(busio_i2c_obj_t *self) {
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return self->sda_pin == NO_PIN;
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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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// never_reset_i2c[i2c_hw_index(self->peripheral)] = false;
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reset_pin_number(self->sda_pin);
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reset_pin_number(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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bool common_hal_busio_i2c_probe(busio_i2c_obj_t *self, uint8_t addr) {
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return common_hal_busio_i2c_write(self, addr, NULL, 0, true) == 0;
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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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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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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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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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return MP_ENODEV;
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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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return MP_ENODEV;
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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[i2c_hw_index(self->peripheral)] = true;
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never_reset_pin_number(self->scl_pin);
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never_reset_pin_number(self->sda_pin);
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}
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