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.
108 lines
2.4 KiB
C++
108 lines
2.4 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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* 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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void SPIClass::begin()
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{
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if (!initialized) {
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if (!bcm2835_spi_begin()) {
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logError("You need root privilege 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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{
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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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{
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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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{
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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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{
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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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{
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if (csn_pin == RPI_GPIO_P1_26) {
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csn_pin = BCM2835_SPI_CS1;
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} else if (csn_pin == RPI_GPIO_P1_24) {
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csn_pin = BCM2835_SPI_CS0;
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} else {
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csn_pin = BCM2835_SPI_CS0;
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}
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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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{
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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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{
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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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{
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(void)interruptNumber;
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}
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void SPIClass::notUsingInterrupt(uint8_t interruptNumber)
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{
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(void)interruptNumber;
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}
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