145 lines
3.7 KiB
C++
145 lines
3.7 KiB
C++
/******************************************************************************
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* The MIT License
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*
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* Copyright (c) 2010 Perry Hung.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* 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
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*****************************************************************************/
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/*
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* Arduino-compatible digital I/O implementation.
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*/
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#include "wirish.h"
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void pinMode(uint8 pin, WiringPinMode mode) {
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gpio_pin_mode outputMode;
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boolean pwm = false;
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if (pin >= BOARD_NR_GPIO_PINS) {
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return;
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}
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switch(mode) {
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case OUTPUT:
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outputMode = GPIO_OUTPUT_PP;
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break;
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case OUTPUT_OPEN_DRAIN:
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outputMode = GPIO_OUTPUT_OD;
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break;
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case INPUT:
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case INPUT_FLOATING:
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outputMode = GPIO_INPUT_FLOATING;
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break;
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case INPUT_ANALOG:
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outputMode = GPIO_INPUT_ANALOG;
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break;
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case INPUT_PULLUP:
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outputMode = GPIO_INPUT_PU;
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break;
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case INPUT_PULLDOWN:
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outputMode = GPIO_INPUT_PD;
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break;
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case PWM:
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outputMode = GPIO_AF_OUTPUT_PP;
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pwm = true;
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break;
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case PWM_OPEN_DRAIN:
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outputMode = GPIO_AF_OUTPUT_OD;
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pwm = true;
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break;
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default:
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ASSERT(0);
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return;
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}
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gpio_set_mode(pin, outputMode);
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if (PIN_MAP[pin].timer_device != NULL) {
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/* Enable/disable timer channels if we're switching into or
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* out of PWM. */
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timer_set_mode(PIN_MAP[pin].timer_device,
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PIN_MAP[pin].timer_channel,
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pwm ? TIMER_PWM : TIMER_DISABLED);
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}
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}
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uint32 digitalRead(uint8 pin)
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{
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if (pin >= BOARD_NR_GPIO_PINS) {
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return 0;
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}
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return gpio_read_pin(pin) ?
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HIGH : LOW;
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}
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void digitalWrite(uint8 pin, uint8 val)
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{
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if (pin >= BOARD_NR_GPIO_PINS) {
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return;
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}
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gpio_write_pin(pin, val);
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}
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void togglePin(uint8 pin)
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{
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if (pin >= BOARD_NR_GPIO_PINS) {
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return;
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}
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gpio_toggle_pin(pin);
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}
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#define BUTTON_DEBOUNCE_DELAY 1
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uint8 isButtonPressed(uint8_t button) {
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if (digitalRead(button)) {
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delay(BUTTON_DEBOUNCE_DELAY);
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while (digitalRead(button))
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;
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return true;
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}
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return false;
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}
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uint8 waitForButtonPress(uint8_t button, uint32 timeout) {
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uint32 start = millis();
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uint32 time;
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if (timeout == 0) {
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while (!isButtonPressed(button))
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;
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return true;
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}
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do {
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time = millis();
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/* properly handle wrap-around */
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if ((start > time && time + (0xffffffffU - start) > timeout) ||
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time - start > timeout) {
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return false;
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}
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} while (!isButtonPressed(button));
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return true;
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}
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