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rp2040: spi - enable fifo

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Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
This commit is contained in:
Timofey Titovets 2025-05-23 02:52:46 +02:00 committed by KevinOConnor
parent de182b1d14
commit f4130aa948
1 changed files with 8 additions and 4 deletions
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12
src/rp2040/spi.c
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@ -132,11 +132,15 @@ void
spi_transfer(struct spi_config config, uint8_t receive_data,
uint8_t len, uint8_t *data)
{
uint8_t* wptr = data;
uint8_t* end = data + len;
spi_hw_t *spi = config.spi;
while (len--) {
spi->dr = *data;
while (!(spi->sr & SPI_SSPSR_RNE_BITS))
;
while (data < end) {
uint32_t sr = spi->sr & (SPI_SSPSR_TNF_BITS | SPI_SSPSR_RNE_BITS);
if ((sr == SPI_SSPSR_TNF_BITS) && wptr < end)
spi->dr = *wptr++;
if (!(sr & SPI_SSPSR_RNE_BITS))
continue;
uint8_t rdata = spi->dr;
if(receive_data)
*data = rdata;