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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 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 "common-hal/microcontroller/__init__.h"
#include "common-hal/microcontroller/Pin.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "py/mphal.h"
#include "eagle_soc.h"
extern volatile bool adc_in_use;
bool common_hal_mcu_pin_is_free(const mcu_pin_obj_t* pin) {
if (pin == &pin_TOUT) {
return !adc_in_use;
}
if (pin->gpio_number == NO_GPIO || pin->gpio_number == SPECIAL_CASE) {
return false;
}
return (READ_PERI_REG(pin->peripheral) &
(PERIPHS_IO_MUX_FUNC<<PERIPHS_IO_MUX_FUNC_S)) == 0 &&
(GPIO_REG_READ(GPIO_ENABLE_ADDRESS) & (1 << pin->gpio_number)) == 0 &&
(READ_PERI_REG(pin->peripheral) & PERIPHS_IO_MUX_PULLUP) == 0;
}
void reset_pins(void) {
for (int i = 0; i < 17; i++) {
// 5 is RXD, 6 is TXD
if ((i > 4 && i < 13) || i == 12) {
continue;
}
uint32_t peripheral = PERIPHS_IO_MUX + i * 4;
PIN_FUNC_SELECT(peripheral, 0);
PIN_PULLUP_DIS(peripheral);
// Disable the pin.
gpio_output_set(0x0, 0x0, 0x0, 1 << i);
}
}
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