63 lines
2.3 KiB
C
63 lines
2.3 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 "common-hal/microcontroller/__init__.h"
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#include "common-hal/microcontroller/Pin.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "py/mphal.h"
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#include "eagle_soc.h"
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extern volatile bool adc_in_use;
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bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
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if (pin == &pin_TOUT) {
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return !adc_in_use;
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}
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if (pin->gpio_number == NO_GPIO || pin->gpio_number == SPECIAL_CASE) {
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return false;
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}
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return (READ_PERI_REG(pin->peripheral) &
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(PERIPHS_IO_MUX_FUNC<<PERIPHS_IO_MUX_FUNC_S)) == 0 &&
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(GPIO_REG_READ(GPIO_ENABLE_ADDRESS) & (1 << pin->gpio_number)) == 0 &&
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(READ_PERI_REG(pin->peripheral) & PERIPHS_IO_MUX_PULLUP) == 0;
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}
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void reset_pins(void) {
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for (int i = 0; i < 17; i++) {
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// 5 is RXD, 6 is TXD
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if ((i > 4 && i < 13) || i == 12) {
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continue;
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}
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uint32_t peripheral = PERIPHS_IO_MUX + i * 4;
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PIN_FUNC_SELECT(peripheral, 0);
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PIN_PULLUP_DIS(peripheral);
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// Disable the pin.
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gpio_output_set(0x0, 0x0, 0x0, 1 << i);
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}
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}
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