SPI configuration for nrf52832

[Marc]

I've configured the SPI with DMA module as in the code below.

I've loaded the tx buffer with sample data and start the transaction; however, I'm not reading anything either on the MOSI pin or the MISO pin. The SCK pin also stays low. The tx and rx end events do go from 0 to 1 correctly.

Any ideas what I'm doing wrong?

Thanksspi code.rtf

[hmolesworth]

Ok last change, this makes your code work on my SPI; SPI has to be enabled before you write the Tx and Rx buffers info:

  NRF_SPIM0->ENABLE = 7;  //enabled

  NRF_SPIM0->TXD.PTR = (uint32_t)((uint8_t *)spiTXBuf);
  NRF_SPIM0->TXD.MAXCNT = mRxTxBufLength; //2;
  NRF_SPIM0->RXD.PTR = (uint32_t)((uint8_t *)spiRXBuf);
  NRF_SPIM0->RXD.MAXCNT = mRxTxBufLength; //2;

[Marc]

The placement of the ENABLE command doesn't seem to have any effect for me. I see the clock on my scope but nothing on the MOSI pin. It should look like the square wave of the clock signal since the data is 0b10101010