107 lines
2.6 KiB
C++
107 lines
2.6 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 Marcelo Aquino <marceloaqno@gmail.org>
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* Copyright (C) 2016 Marcelo Aquino
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* Full contributor list: https://github.com/mysensors/MySensors/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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* Based on TMRh20 RF24 library, Copyright (c) 2015 Charles-Henri Hallard <tmrh20@gmail.com>
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*/
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#include "SPI.h"
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#include <pthread.h>
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#include <stdlib.h>
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#include "log.h"
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static pthread_mutex_t spiMutex = PTHREAD_MUTEX_INITIALIZER;
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// Declare a single default instance
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SPIClass SPI = SPIClass();
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uint8_t SPIClass::initialized = 0;
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SPIClass::SPIClass() {
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if (!bcm2835_init()) {
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mys_log(LOG_ERR, "Failed to initialized bcm2835.\n");
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exit(1);
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}
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}
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SPIClass::~SPIClass() {}
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uint8_t SPIClass::isInitialized() {
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return initialized;
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}
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void SPIClass::begin() {
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if (!initialized) {
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if (!bcm2835_spi_begin()) {
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mys_log(LOG_ERR, "You need to be root to use SPI.\n");
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exit(1);
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}
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}
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initialized++; // reference count
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}
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void SPIClass::end() {
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if (initialized) {
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initialized--;
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}
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if (!initialized) {
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// End the SPI
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bcm2835_spi_end();
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}
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}
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void SPIClass::setBitOrder(uint8_t bit_order) {
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bcm2835_spi_setBitOrder(bit_order);
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}
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void SPIClass::setDataMode(uint8_t data_mode) {
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bcm2835_spi_setDataMode(data_mode);
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}
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void SPIClass::setClockDivider(uint16_t divider) {
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bcm2835_spi_setClockDivider(divider);
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}
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void SPIClass::chipSelect(int csn_pin) {
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if (csn_pin == RPI_GPIO_P1_26) csn_pin = BCM2835_SPI_CS1;
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else if (csn_pin == RPI_GPIO_P1_24) csn_pin = BCM2835_SPI_CS0;
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else csn_pin = BCM2835_SPI_CS0;
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bcm2835_spi_chipSelect(csn_pin);
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delayMicroseconds(5);
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}
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void SPIClass::beginTransaction(SPISettings settings) {
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pthread_mutex_lock(&spiMutex);
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setBitOrder(settings.border);
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setDataMode(settings.dmode);
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setClockDivider(settings.cdiv);
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}
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void SPIClass::endTransaction() {
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pthread_mutex_unlock(&spiMutex);
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}
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void SPIClass::usingInterrupt(uint8_t interruptNumber) {
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(void)interruptNumber;
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}
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void SPIClass::notUsingInterrupt(uint8_t interruptNumber) {
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(void)interruptNumber;
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}
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