Single Byte SPI transfer with SDK15.2

[W9]

I'm trying to implement the workaround for PAN58 on an nRF52832 device using SDK15.2

I've copied in the code from a previous post but I keep getting an error when I declare 'NRF_SPIM_Type * p_spim = TCspi.p_registers;' in the set up. The error I get says 'nrf_drv_spi_t {aka const struct <anonymous>}' has no member named 'p_registers'.

Init code is included. What am I doing wrong?

void Init_TC_SPI(void) {
  ret_code_t ret;
  // Configure SPIM-0 for TFT operation
  nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
  spi_config.ss_pin = SPIM_CS;
  spi_config.miso_pin = SPIM_MISO;
  spi_config.mosi_pin = SPIM_MOSI;
  spi_config.sck_pin = SPIM_CLK;
  spi_config.mode = NRF_DRV_SPI_MODE_1;
  spi_config.frequency = NRF_DRV_SPI_FREQ_4M;
  //    APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, spi_event_handler, NULL));
  ret = nrf_drv_spi_init(&TCspi, &spi_config, spi_event_handler, NULL);
  //ret = nrf_drv_spi_init(&TCspi, &spi_config, NULL, NULL);
  //if(ret!=NRFX_SUCCESS) { SET_ERR(w9_SPI_init_failed);}

  // ### Workaround Section Start ###

  uint32_t err_code;
  NRF_SPIM_Type * p_spim = TCspi.p_registers;
  //NRF_SPIM_Type * p_spim = TCspi.p_reg;
  //Initialize GPIOTE and PPI drivers for the workaround
  err_code = nrf_drv_gpiote_init();
  APP_ERROR_CHECK(err_code);

  // Initializes the GPIOTE channel so that SCK toggles generates events
  nrf_drv_gpiote_in_config_t config = GPIOTE_CONFIG_IN_SENSE_TOGGLE(true);
  err_code = nrf_drv_gpiote_in_init(SPIM_CLK, &config, in_pin_handler);
  APP_ERROR_CHECK(err_code);

  err_code = nrf_drv_ppi_init();
  APP_ERROR_CHECK(err_code);

  // Allocate first unused PPI channel
  err_code = nrf_drv_ppi_channel_alloc(&ppi_channel);
  APP_ERROR_CHECK(err_code);

  // Assign the PPI channel to the SCK pin
  err_code = nrf_drv_ppi_channel_assign(ppi_channel,
      nrf_drv_gpiote_in_event_addr_get(SPIM_CLK),
      (uint32_t)&p_spim->TASKS_STOP);
 

  APP_ERROR_CHECK(err_code);
  // ### Workaround Section End   ###
}

[Einar Thorsrud]

Hi,

The error makes sense, as there is no p_registers or p_member members of the nrf_drv_spi_t, as indicated by the error. Therefor, the code does not really make sense. Which post did you base this on?

The simplest way to handle this is by calling the driver differently depending on weather you want to transfer 1 or more bytes, as suggested here.

Br,

Einar

[W9]

I think the original post was Case ID: 116400 from 3 yrs ago. I saw the len check solution after I posted this request. I will try that solution.

You can convert this to a public case. I did not intend for it to be private.

Thanks,

Wayne