You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
circuitpython/ports/nrf/common-hal/digitalio/DigitalInOut.c

158 lines
5.4 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
*
* 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/digitalio/DigitalInOut.h"
#include "py/runtime.h"
#include "supervisor/shared/translate.h"
#include "nrf_gpio.h"
void common_hal_digitalio_digitalinout_never_reset(
digitalio_digitalinout_obj_t *self) {
never_reset_pin_number(self->pin->number);
}
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;
nrf_gpio_cfg_input(pin->number, NRF_GPIO_PIN_NOPULL);
return DIGITALINOUT_OK;
}
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;
}
nrf_gpio_cfg_default(self->pin->number);
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) {
nrf_gpio_cfg_input(self->pin->number, NRF_GPIO_PIN_NOPULL);
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) {
common_hal_digitalio_digitalinout_set_drive_mode(self, drive_mode);
common_hal_digitalio_digitalinout_set_value(self, value);
}
digitalio_direction_t common_hal_digitalio_digitalinout_get_direction(
digitalio_digitalinout_obj_t *self) {
return (nrf_gpio_pin_dir_get(self->pin->number) == NRF_GPIO_PIN_DIR_INPUT)
? DIRECTION_INPUT : DIRECTION_OUTPUT;
}
void common_hal_digitalio_digitalinout_set_value(
digitalio_digitalinout_obj_t *self, bool value) {
nrf_gpio_pin_write(self->pin->number, value);
}
bool common_hal_digitalio_digitalinout_get_value(
digitalio_digitalinout_obj_t *self) {
return (nrf_gpio_pin_dir_get(self->pin->number) == NRF_GPIO_PIN_DIR_INPUT)
? nrf_gpio_pin_read(self->pin->number)
: nrf_gpio_pin_out_read(self->pin->number);
}
void common_hal_digitalio_digitalinout_set_drive_mode(
digitalio_digitalinout_obj_t *self,
digitalio_drive_mode_t drive_mode) {
nrf_gpio_cfg(self->pin->number,
NRF_GPIO_PIN_DIR_OUTPUT,
NRF_GPIO_PIN_INPUT_DISCONNECT,
NRF_GPIO_PIN_NOPULL,
drive_mode == DRIVE_MODE_OPEN_DRAIN ? NRF_GPIO_PIN_H0D1 : NRF_GPIO_PIN_H0H1,
NRF_GPIO_PIN_NOSENSE);
}
digitalio_drive_mode_t common_hal_digitalio_digitalinout_get_drive_mode(
digitalio_digitalinout_obj_t *self) {
uint32_t pin = self->pin->number;
// Changes pin to be a relative pin number in port.
NRF_GPIO_Type *reg = nrf_gpio_pin_port_decode(&pin);
switch ((reg->PIN_CNF[pin] & GPIO_PIN_CNF_DRIVE_Msk) >> GPIO_PIN_CNF_DRIVE_Pos) {
case NRF_GPIO_PIN_S0D1:
case NRF_GPIO_PIN_H0D1:
return DRIVE_MODE_OPEN_DRAIN;
default:
return DRIVE_MODE_PUSH_PULL;
}
}
void common_hal_digitalio_digitalinout_set_pull(
digitalio_digitalinout_obj_t *self, digitalio_pull_t pull) {
nrf_gpio_pin_pull_t hal_pull = NRF_GPIO_PIN_NOPULL;
switch (pull) {
case PULL_UP:
hal_pull = NRF_GPIO_PIN_PULLUP;
break;
case PULL_DOWN:
hal_pull = NRF_GPIO_PIN_PULLDOWN;
break;
case PULL_NONE:
default:
break;
}
nrf_gpio_cfg_input(self->pin->number, hal_pull);
}
digitalio_pull_t common_hal_digitalio_digitalinout_get_pull(
digitalio_digitalinout_obj_t *self) {
uint32_t pin = self->pin->number;
// Changes pin to be a relative pin number in port.
NRF_GPIO_Type *reg = nrf_gpio_pin_port_decode(&pin);
if (nrf_gpio_pin_dir_get(self->pin->number) == NRF_GPIO_PIN_DIR_OUTPUT) {
mp_raise_AttributeError(translate("Cannot get pull while in output mode"));
}
switch ((reg->PIN_CNF[pin] & GPIO_PIN_CNF_PULL_Msk) >> GPIO_PIN_CNF_PULL_Pos) {
case NRF_GPIO_PIN_PULLUP:
return PULL_UP;
case NRF_GPIO_PIN_PULLDOWN:
return PULL_DOWN;
default:
return PULL_NONE;
}
}