mirror of https://github.com/commaai/panda.git
24 lines
620 B
C
24 lines
620 B
C
|
void spi_init() {
|
||
|
|
puts("SPI init\n");
|
||
|
|
SPI1->CR1 = SPI_CR1_SPE;
|
||
|
|
//SPI1->CR2 = SPI_CR2_RXNEIE | SPI_CR2_ERRIE | SPI_CR2_TXEIE;
|
||
|
|
}
|
||
|
|
|
||
|
|
void spi_tx_dma(void *addr, int len) {
|
||
|
|
// disable DMA
|
||
|
|
SPI1->CR2 &= ~SPI_CR2_TXDMAEN;
|
||
|
|
DMA2_Stream3->CR &= ~DMA_SxCR_EN;
|
||
|
|
|
||
|
|
// DMA2, stream 3, channel 3
|
||
|
|
DMA2_Stream3->M0AR = addr;
|
||
|
|
DMA2_Stream3->NDTR = len;
|
||
|
|
DMA2_Stream3->PAR = &(SPI1->DR);
|
||
|
|
|
||
|
|
// channel3, increment memory, memory -> periph, enable
|
||
|
|
DMA2_Stream3->CR = DMA_SxCR_CHSEL_1 | DMA_SxCR_CHSEL_0 | DMA_SxCR_MINC | DMA_SxCR_DIR_0 | DMA_SxCR_EN;
|
||
|
|
DMA2_Stream3->CR |= DMA_SxCR_TCIE;
|
||
|
|
|
||
|
|
SPI1->CR2 |= SPI_CR2_TXDMAEN;
|
||
|
|
}
|
||
|
|
|