RE: SPI - Manual control of CS line and sending and receiving 1 byte at a time.

Throw_Throw_Burrito — Thu, 09 Feb 2023 11:02:57 GMT

Thanks. Making that change to RX made no difference.

But I did manage to find my error though, pointer issues..........

void w5500_test_write_reg(uint8_t *tx_data)
{
NRF_LOG_INFO("Write = %d", tx_data);

//**** TX & RX transmition parameters
uint8_t tx_len = 1; // TX number of bytes

spi_xfer_done = false; //**** Set the transfer flag to false
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, &tx_data, tx_len, NULL, 0));
while(spi_xfer_done == false){};
}

RE: SPI - Manual control of CS line and sending and receiving 1 byte at a time.

Kenneth — Wed, 08 Feb 2023 15:36:02 GMT

Conseptually I don't see any reason why this should not work, but can you just create a rx_data buffer[1] and rx_len=0?

If no luck, please build with DEBUG so you can find exactly where the fatal error occurs from the log output from app_error_fault_handler().

Kenneth