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circuitpython/ports/mimxrt10xx/common-hal/digitalio/DigitalInOut.c

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5.8 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
* Copyright (c) 2019 Artur Pacholec
*
* 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 <string.h>
#include <stdio.h>
#include "py/runtime.h"
#include "py/mphal.h"
#include "fsl_gpio.h"
#include "common-hal/microcontroller/Pin.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "supervisor/shared/translate.h"
#define IOMUXC_SW_MUX_CTL_PAD_MUX_MODE_ALT5 5U
void pin_config(const mcu_pin_obj_t *pin, bool open_drain, digitalio_pull_t pull)
{
IOMUXC_SetPinConfig(0, 0, 0, 0, pin->cfg_reg,
IOMUXC_SW_PAD_CTL_PAD_HYS(1)
| IOMUXC_SW_PAD_CTL_PAD_PUS((pull == PULL_UP) ? 2 : 0)
| IOMUXC_SW_PAD_CTL_PAD_PUE(pull != PULL_NONE)
| IOMUXC_SW_PAD_CTL_PAD_PKE(1)
| IOMUXC_SW_PAD_CTL_PAD_ODE(open_drain)
| IOMUXC_SW_PAD_CTL_PAD_SPEED(2)
| IOMUXC_SW_PAD_CTL_PAD_DSE(1)
| IOMUXC_SW_PAD_CTL_PAD_SRE(0));
}
digitalinout_result_t common_hal_digitalio_digitalinout_construct(
digitalio_digitalinout_obj_t* self, const mcu_pin_obj_t* pin) {
claim_pin(pin);
self->pin = pin;
self->output = false;
self->open_drain = false;
self->pull = PULL_NONE;
// GPIO is always IOMUXC_SW_MUX_CTL_PAD_MUX_MODE_ALT5 until proven otherwise
IOMUXC_SetPinMux(pin->mux_reg, IOMUXC_SW_MUX_CTL_PAD_MUX_MODE_ALT5, 0, 0, 0, 0);
pin_config(pin, self->open_drain, self->pull);
const gpio_pin_config_t config = { kGPIO_DigitalInput, 0, kGPIO_NoIntmode };
GPIO_PinInit(self->pin->gpio, self->pin->number, &config);
return DIGITALINOUT_OK;
}
void common_hal_digitalio_digitalinout_never_reset(
digitalio_digitalinout_obj_t *self) {
never_reset_pin_number(self->pin->number);
}
bool common_hal_digitalio_digitalinout_deinited(digitalio_digitalinout_obj_t* self) {
return self->pin == NULL;
}
void common_hal_digitalio_digitalinout_deinit(digitalio_digitalinout_obj_t* self) {
if (common_hal_digitalio_digitalinout_deinited(self)) {
return;
}
reset_pin_number(self->pin->number);
self->pin = NULL;
}
void common_hal_digitalio_digitalinout_switch_to_input(
digitalio_digitalinout_obj_t* self, digitalio_pull_t pull) {
self->output = false;
// This also sets direction to input.
common_hal_digitalio_digitalinout_set_pull(self, pull);
}
void common_hal_digitalio_digitalinout_switch_to_output(
digitalio_digitalinout_obj_t* self, bool value,
digitalio_drive_mode_t drive_mode) {
self->output = true;
self->open_drain = drive_mode == DRIVE_MODE_OPEN_DRAIN;
self->pull = PULL_NONE;
pin_config(self->pin, self->open_drain, self->pull);
const gpio_pin_config_t config = { kGPIO_DigitalOutput, value, kGPIO_NoIntmode };
GPIO_PinInit(self->pin->gpio, self->pin->number, &config);
}
digitalio_direction_t common_hal_digitalio_digitalinout_get_direction(
digitalio_digitalinout_obj_t* self) {
return self->output ? DIRECTION_OUTPUT : DIRECTION_INPUT;
}
void common_hal_digitalio_digitalinout_set_value(
digitalio_digitalinout_obj_t* self, bool value) {
GPIO_PinWrite(self->pin->gpio, self->pin->number, value);
}
bool common_hal_digitalio_digitalinout_get_value(
digitalio_digitalinout_obj_t* self) {
return GPIO_PinRead(self->pin->gpio, self->pin->number);
}
void common_hal_digitalio_digitalinout_set_drive_mode(
digitalio_digitalinout_obj_t* self,
digitalio_drive_mode_t drive_mode) {
bool value = common_hal_digitalio_digitalinout_get_value(self);
self->open_drain = drive_mode == DRIVE_MODE_OPEN_DRAIN;
pin_config(self->pin, self->open_drain, self->pull);
// True is implemented differently between modes so reset the value to make
// sure it's correct for the new mode.
if (value) {
common_hal_digitalio_digitalinout_set_value(self, value);
}
}
digitalio_drive_mode_t common_hal_digitalio_digitalinout_get_drive_mode(
digitalio_digitalinout_obj_t* self) {
if (self->open_drain) {
return DRIVE_MODE_OPEN_DRAIN;
} else {
return DRIVE_MODE_PUSH_PULL;
}
}
void common_hal_digitalio_digitalinout_set_pull(
digitalio_digitalinout_obj_t* self, digitalio_pull_t pull) {
self->pull = pull;
pin_config(self->pin, self->open_drain, self->pull);
const gpio_pin_config_t config = { kGPIO_DigitalInput, 0, kGPIO_NoIntmode };
GPIO_PinInit(self->pin->gpio, self->pin->number, &config);
}
digitalio_pull_t common_hal_digitalio_digitalinout_get_pull(
digitalio_digitalinout_obj_t* self) {
if (self->output) {
mp_raise_AttributeError(translate("Cannot get pull while in output mode"));
return PULL_NONE;
} else {
return self->pull;
}
}