Marcelo Aquino
2e0f6b6229
RPi and Linux refactor. Add GPIO Sysfs for GPIO operations. Update configure script. Fix some cppcheck warnings. Add serial emulation that prints to stdout. Fix some file headers.
128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/*
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* The MySensors Arduino library handles the wireless radio link and protocol
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* between your home built sensors/actuators and HA controller of choice.
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* The sensors forms a self healing radio network with optional repeaters. Each
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* repeater and gateway builds a routing tables in EEPROM which keeps track of the
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* network topology allowing messages to be routed to nodes.
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*
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* Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
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* Copyright (C) 2013-2017 Sensnology AB
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* Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
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*
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* Documentation: http://www.mysensors.org
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* Support Forum: http://forum.mysensors.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*/
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#include "RPi.h"
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#include <stdlib.h>
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#include "log.h"
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const static int pin_to_gpio_rev1[41] = {-1, -1, -1, 0, -1, 1, -1, 4, 14, -1, 15, 17, 18, 21, -1, 22, 23, -1, 24, 10, -1, 9, 25, 11, 8, -1, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };
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const static int pin_to_gpio_rev2[41] = {-1, -1, -1, 2, -1, 3, -1, 4, 14, -1, 15, 17, 18, 27, -1, 22, 23, -1, 24, 10, -1, 9, 25, 11, 8, -1, 7, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 };
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const static int pin_to_gpio_rev3[41] = {-1, -1, -1, 2, -1, 3, -1, 4, 14, -1, 15, 17, 18, 27, -1, 22, 23, -1, 24, 10, -1, 9, 25, 11, 8, -1, 7, -1, -1, 5, -1, 6, 12, 13, -1, 19, 16, 26, 20, -1, 21 };
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// Declare a single default instance
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RPi rpi = RPi();
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const int* RPi::pin_to_gpio = NULL;
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rpi_info RPi::rpiinfo;
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RPi::RPi()
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{
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if (!bcm2835_init()) {
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logError("Failed to initialized bcm2835.\n");
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exit(1);
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}
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}
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RPi::~RPi()
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{
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bcm2835_close();
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}
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void RPi::pinMode(uint8_t physPin, uint8_t mode)
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{
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uint8_t gpioPin;
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if (physToGPIO(physPin, &gpioPin)) {
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logError("pinMode: invalid pin: %d\n", physPin);
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return;
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}
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bcm2835_gpio_fsel(gpioPin, mode);
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}
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void RPi::digitalWrite(uint8_t physPin, uint8_t value)
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{
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uint8_t gpioPin;
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if (physToGPIO(physPin, &gpioPin)) {
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logError("digitalWrite: invalid pin: %d\n", physPin);
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return;
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}
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bcm2835_gpio_write(gpioPin, value);
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// Delay to allow any change in state to be reflected in the LEVn, register bit.
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delayMicroseconds(1);
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}
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uint8_t RPi::digitalRead(uint8_t physPin)
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{
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uint8_t gpioPin;
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if (physToGPIO(physPin, &gpioPin)) {
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logError("digitalRead: invalid pin: %d\n", physPin);
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return 0;
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}
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return bcm2835_gpio_lev(gpioPin);
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}
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uint8_t RPi::digitalPinToInterrupt(uint8_t physPin)
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{
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uint8_t gpioPin;
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if (physToGPIO(physPin, &gpioPin)) {
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logError("digitalPinToInterrupt: invalid pin: %d\n", physPin);
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return 0;
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}
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return gpioPin;
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}
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int RPi::physToGPIO(uint8_t physPin, uint8_t *gpio)
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{
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if (pin_to_gpio == NULL) {
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// detect board revision and set up accordingly
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if (get_rpi_info(&rpiinfo)) {
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logError("This module can only be run on a Raspberry Pi!\n");
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exit(1);
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}
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if (rpiinfo.p1_revision == 1) {
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pin_to_gpio = &pin_to_gpio_rev1[0];
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} else if (rpiinfo.p1_revision == 2) {
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pin_to_gpio = &pin_to_gpio_rev2[0];
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} else { // assume model B+ or A+ or 2B
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pin_to_gpio = &pin_to_gpio_rev3[0];
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}
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}
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if ((rpiinfo.p1_revision != 3 && physPin > 26)
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|| (rpiinfo.p1_revision == 3 && physPin > 40)) {
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return -1;
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}
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if (*(pin_to_gpio+physPin) == -1) {
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return -1;
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} else {
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*gpio = *(pin_to_gpio+physPin);
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}
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return 0;
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}
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