108 lines
3.3 KiB
C
108 lines
3.3 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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*
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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 "rgb_led_status.h"
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#include "samd21_pins.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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#ifdef MICROPY_HW_APA102_MOSI
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bool apa102_sck_in_use;
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bool apa102_mosi_in_use;
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#endif
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void reset_pin(uint8_t pin) {
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if (pin >= PORT_BITS) {
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return;
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}
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#ifdef MICROPY_HW_NEOPIXEL
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if (pin == MICROPY_HW_NEOPIXEL->pin) {
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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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#ifdef MICROPY_HW_APA102_MOSI
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if (pin == MICROPY_HW_APA102_MOSI->pin ||
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pin == MICROPY_HW_APA102_SCK->pin) {
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apa102_mosi_in_use = apa102_mosi_in_use && pin != MICROPY_HW_APA102_MOSI->pin;
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apa102_sck_in_use = apa102_sck_in_use && pin != MICROPY_HW_APA102_SCK->pin;
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if (!apa102_sck_in_use && !apa102_mosi_in_use) {
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rgb_led_status_init();
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}
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return;
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}
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#endif
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struct system_pinmux_config config;
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system_pinmux_get_config_defaults(&config);
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config.powersave = true;
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system_pinmux_pin_set_config(pin, &config);
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}
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void claim_pin(const mcu_pin_obj_t* pin) {
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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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#ifdef MICROPY_HW_APA102_MOSI
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if (pin == MICROPY_HW_APA102_MOSI) {
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apa102_mosi_in_use = true;
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}
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if (pin == MICROPY_HW_APA102_SCK) {
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apa102_sck_in_use = true;
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}
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#endif
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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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#ifdef MICROPY_HW_NEOPIXEL
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if (pin == MICROPY_HW_NEOPIXEL) {
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return !neopixel_in_use;
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}
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#endif
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#ifdef MICROPY_HW_APA102_MOSI
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if (pin == MICROPY_HW_APA102_MOSI) {
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return !apa102_mosi_in_use;
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}
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if (pin == MICROPY_HW_APA102_SCK) {
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return !apa102_sck_in_use;
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}
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#endif
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PortGroup *const port = system_pinmux_get_group_from_gpio_pin(pin->pin);
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uint32_t pin_index = (pin->pin);
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PORT_PINCFG_Type state = port->PINCFG[pin_index];
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return state.bit.PMUXEN == 0 && state.bit.INEN == 0 &&
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state.bit.PULLEN == 0 && (port->DIR.reg & (1 << pin_index)) == 0;
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}
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