Johannes Stratmann / BurstSPI

Fast SPI write, added LPC812 Target

Dependents:   wsDrive

Fork of BurstSPI by Erik -

BurstSPI_STM32F4.cpp

Committer:
JojoS
Date:
2016-12-10
Revision:
15:8241b7d84ad2
Parent:
13:bc069279eb37

File content as of revision 15:8241b7d84ad2:

#if defined(TARGET_STM32F4)
#include "BurstSPI.h"

#if DEVICE_SPI_ASYNCH
    #define SPI_INST(obj)    ((SPI_TypeDef *)((obj)->spi.spi))
#else
    #define SPI_INST(obj)    ((SPI_TypeDef *)((obj)->spi))
#endif 

void BurstSPI::fastWrite(int data) {
    SPI_TypeDef *spi = SPI_INST(&_spi);     
    // Check if data is transmitted
    while ((spi->SR & SPI_SR_TXE) == 0);
    spi->DR = data;
}
    
void BurstSPI::clearRX( void ) {
    //Check if the RX buffer is busy
    SPI_TypeDef *spi = SPI_INST(&_spi);     
    //While busy, keep checking
    while (spi->SR & SPI_SR_BSY){   
        // Check RX buffer readable
        while ((spi->SR & SPI_SR_RXNE) == 0);
        int dummy = spi->DR;
    }
}
#endif