mirror of https://github.com/arendst/Tasmota.git
55 lines
990 B
C++
55 lines
990 B
C++
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#include "spi.h"
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#include <pthread.h>
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#include <unistd.h>
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static pthread_mutex_t spiMutex = PTHREAD_MUTEX_INITIALIZER;
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bool bcmIsInitialized = false;
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SPI::SPI() {
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}
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void SPI::begin( int busNo ) {
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if(!bcmIsInitialized){
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if (!bcm2835_init()){
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return;
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}
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}
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bcmIsInitialized = true;
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bcm2835_spi_begin();
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}
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void SPI::beginTransaction(SPISettings settings){
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if (geteuid() != 0){
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throw -1;
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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.clck);
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}
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void SPI::endTransaction() {
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pthread_mutex_unlock (&spiMutex);
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}
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void SPI::setBitOrder(uint8_t bit_order) {
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bcm2835_spi_setBitOrder(bit_order);
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}
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void SPI::setDataMode(uint8_t data_mode) {
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bcm2835_spi_setDataMode(data_mode);
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}
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void SPI::setClockDivider(uint16_t spi_speed) {
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bcm2835_spi_setClockDivider(spi_speed);
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}
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void SPI::chipSelect(int csn_pin){
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bcm2835_spi_chipSelect(csn_pin);
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delayMicroseconds(5);
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}
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SPI::~SPI() {
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}
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