126 lines
3.7 KiB
C
126 lines
3.7 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 for Adafruit Industries
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* Copyright (c) 2019 Lucian Copeland 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 "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "supervisor/shared/rgb_led_status.h"
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#include "py/mphal.h"
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#include "components/driver/include/driver/gpio.h"
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#include "components/hal/include/hal/gpio_hal.h"
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#ifdef MICROPY_HW_NEOPIXEL
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bool neopixel_in_use;
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#endif
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STATIC uint32_t never_reset_pins[2];
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STATIC uint32_t in_use[2];
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bool apa102_mosi_in_use;
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bool apa102_sck_in_use;
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void never_reset_pin_number(gpio_num_t pin_number) {
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if (pin_number == -1 ) {
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return;
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}
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never_reset_pins[pin_number / 32] |= 1 << pin_number % 32;
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}
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void common_hal_never_reset_pin(const mcu_pin_obj_t* pin) {
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never_reset_pin_number(pin->number);
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}
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// Mark pin as free and return it to a quiescent state.
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void reset_pin_number(gpio_num_t pin_number) {
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if (pin_number == -1 ) {
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return;
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}
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never_reset_pins[pin_number / 32] &= ~(1 << pin_number % 32);
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in_use[pin_number / 32] &= ~(1 << pin_number % 32);
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin_number == MICROPY_HW_NEOPIXEL->number) {
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neopixel_in_use = false;
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rgb_led_status_init();
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return;
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}
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#endif
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}
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void common_hal_reset_pin(const mcu_pin_obj_t* pin) {
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reset_pin_number(pin->number);
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}
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void reset_all_pins(void) {
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for (uint8_t i = 0; i < GPIO_PIN_COUNT; i++) {
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uint32_t iomux_address = GPIO_PIN_MUX_REG[i];
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if (iomux_address == 0 ||
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(never_reset_pins[i / 32] & (1 << i % 32)) != 0) {
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continue;
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}
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gpio_set_direction(i, GPIO_MODE_DEF_INPUT);
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gpio_pullup_dis(i);
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gpio_pulldown_dis(i);
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}
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in_use[0] = 0;
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in_use[1] = 0;
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#ifdef MICROPY_HW_NEOPIXEL
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neopixel_in_use = false;
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#endif
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}
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void claim_pin(const mcu_pin_obj_t* pin) {
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in_use[pin->number / 32] |= (1 << pin->number % 32);
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin == MICROPY_HW_NEOPIXEL) {
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neopixel_in_use = true;
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}
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#endif
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}
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void common_hal_mcu_pin_claim(const mcu_pin_obj_t* pin) {
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claim_pin(pin);
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}
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bool pin_number_is_free(gpio_num_t pin_number) {
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin_number == MICROPY_HW_NEOPIXEL->number) {
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return !neopixel_in_use;
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}
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#endif
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uint8_t offset = pin_number / 32;
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uint8_t mask = 1 << pin_number % 32;
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return (never_reset_pins[offset] & mask) == 0 && (in_use[offset] & mask) == 0;
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}
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bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t *pin) {
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return pin_number_is_free(pin->number);
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}
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