SPI using PCA10001 issues

[HPC]

Hi

I used the example from nrf51822_v4.4.1.31827\Board\nrf6310\spi_master_example for my PCA10001 board, as I know the pins configured in this example are for nrf6310 board I modified the section as follows for the PCA10001 board in spi_master_config.h for SPI0

#define SPI_PSELSCK0 42 /< Pin P0.22 for clock */
#define SPI_PSELMOSI0 43 /< Pin P0.23 for MOSI / #define SPI_PSELMISO0 44 /< Pin P0.24 for MISO */ #define SPI_PSELSS0 45 /< Pin P0.25 for Slave select/

(the values for pin assignment are selected as per nRF51822 PS v 1.3 ,pg no:9)

and I shorted the MOSI and MISO together for loop back

But When I monitored using CRO no clock was seen on the pins P0.22 What might be the reason?

Regards HPC

[Stefan Birnir Sverrisson]

Hi

I think you are misunderstanding table 1 in nRF51822 PS v1.3. Pin 42 in the table refers to the physical mapping of the pins in figure 2. When you want to configure pin P0.22 to be the SPI clock, then you should simply write:

#define SPI_PSELSCK0 22 /**< Pin P0.22 for clock */

Do the same for the other SPI pins and it should work