ADS1118:
How can I recieve the first 16 bits getting transmitted by the slave ? Will MOSI clock out p_txBuf while storing bits to arr_rxBuf if I set TX buffer len to 0, like this:
nrf_drv_spi_transfer(&spi, p_txBuf, NULL, arr_rxBuf, 2);
ADS1118:
How can I recieve the first 16 bits getting transmitted by the slave ? Will MOSI clock out p_txBuf while storing bits to arr_rxBuf if I set TX buffer len to 0, like this:
nrf_drv_spi_transfer(&spi, p_txBuf, NULL, arr_rxBuf, 2);
Never mind, I feel silly - I had misunderstood how the driver works. It works as expected now.
For reference, all data transmitted though MISO is stored in arr_rxBuf, for this case I just had to set
nrf_drv_spi_transfer(&spi, p_txBuf, 2, arr_rxBuf, 2);
in order to read DATA MSB and DATA LSB.
For the other case:
I just had to call
nrf_drv_spi_transfer(&spi, p_txBuf, 2, arr_rxBuf, 4);
and DATA MSB, DATA LSB, CONFIG MSB, and CONFIG LSB is recieved in arr_rxBuf[0..3]
Never mind, I feel silly - I had misunderstood how the driver works. It works as expected now.
For reference, all data transmitted though MISO is stored in arr_rxBuf, for this case I just had to set
nrf_drv_spi_transfer(&spi, p_txBuf, 2, arr_rxBuf, 2);
in order to read DATA MSB and DATA LSB.
For the other case:
I just had to call
nrf_drv_spi_transfer(&spi, p_txBuf, 2, arr_rxBuf, 4);
and DATA MSB, DATA LSB, CONFIG MSB, and CONFIG LSB is recieved in arr_rxBuf[0..3]