circuitpython/ports/stm/common-hal/microcontroller/Pin.c

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2020-03-11 18:13:06 -04:00
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
* Copyright (c) 2019 Lucian Copeland 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/microcontroller/Pin.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "supervisor/shared/rgb_led_status.h"
#include "py/mphal.h"
#include "stm32f4/pins.h"
#include "stm32f4xx_hal.h"
#ifdef MICROPY_HW_NEOPIXEL
bool neopixel_in_use;
#endif
#if MCU_PACKAGE == 144
#define GPIO_PORT_COUNT 7
GPIO_TypeDef * ports[GPIO_PORT_COUNT] = {GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG};
#elif MCU_PACKAGE == 100
#define GPIO_PORT_COUNT 5
GPIO_TypeDef * ports[GPIO_PORT_COUNT] = {GPIOA, GPIOB, GPIOC, GPIOD, GPIOE};
#elif MCU_PACKAGE == 64
#define GPIO_PORT_COUNT 3
GPIO_TypeDef * ports[GPIO_PORT_COUNT] = {GPIOA, GPIOB, GPIOC};
#elif MCU_PACKAGE == 48
#define GPIO_PORT_COUNT 3
GPIO_TypeDef * ports[GPIO_PORT_COUNT] = {GPIOA, GPIOB, GPIOC};
#endif
STATIC uint16_t claimed_pins[GPIO_PORT_COUNT];
STATIC uint16_t never_reset_pins[GPIO_PORT_COUNT];
void reset_all_pins(void) {
// Reset claimed pins
for (uint8_t i = 0; i < GPIO_PORT_COUNT; i++) {
claimed_pins[i] = never_reset_pins[i];
}
for (uint8_t i = 0; i < GPIO_PORT_COUNT; i++) {
HAL_GPIO_DeInit(ports[i], ~never_reset_pins[i]);
}
#ifdef MICROPY_HW_NEOPIXEL
neopixel_in_use = false;
#endif
}
// Mark pin as free and return it to a quiescent state.
void reset_pin_number(uint8_t pin_port, uint8_t pin_number) {
if (pin_port == 0x0F) {
return;
}
// Clear claimed bit & reset
claimed_pins[pin_port] &= ~(1<<pin_number);
never_reset_pins[pin_port] &= ~(1<<pin_number);
HAL_GPIO_DeInit(ports[pin_port], 1<<pin_number);
#ifdef MICROPY_HW_NEOPIXEL
if (pin_port == MICROPY_HW_NEOPIXEL->port && pin_number == MICROPY_HW_NEOPIXEL->number) {
neopixel_in_use = false;
rgb_led_status_init();
return;
}
#endif
}
void never_reset_pin_number(uint8_t pin_port, uint8_t pin_number) {
never_reset_pins[pin_port] |= 1<<pin_number;
}
void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
never_reset_pin_number(pin->port, pin->number);
}
void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
reset_pin_number(pin->port, pin->number);
}
void claim_pin(const mcu_pin_obj_t* pin) {
// Set bit in claimed_pins bitmask.
claimed_pins[pin->port] |= 1<<pin->number;
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
neopixel_in_use = true;
}
#endif
}
bool pin_number_is_free(uint8_t pin_port, uint8_t pin_number) {
return !(claimed_pins[pin_port] & 1<<pin_number);
}
bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
#ifdef MICROPY_HW_NEOPIXEL
if (pin == MICROPY_HW_NEOPIXEL) {
return !neopixel_in_use;
}
#endif
return pin_number_is_free(pin->port, pin->number);
}
GPIO_TypeDef * pin_port(uint8_t pin_port) {
return ports[pin_port];
}
uint16_t pin_mask(uint8_t pin_number) {
return 1<<pin_number;
}