nrf51822 SPI Slave example doesn't work

[James]

Hi,

I'm trying to get the SPI Slave example working on my nRF51822 PCA100001 development kit.

1. SPI1_TWI1_IRQHandler never gets called even though the ACQUIRED and END enabled bits are set in the SPIS1 INTENSET register.

I try to trigger the interrupt manually by setting the NRF_SPIS1->TASKS_ACQUIRE to 1 and the ACQUIRED Event never gets set.

2. I have verified that the SPI data I'm sending to the nRF51822 has the 7.1 usec delay between CSN going low and the start of my data being clocked out.

3. When I enable the SPI Slave on the nRF51822 the incoming SCK signal is getting divided down even though I have verified that I have not enabled a Pull up or down on this pin in the nRF51822.

Thanks for the help!

[Stefan Birnir Sverrisson]

Hi

Make sure the two boards have the same ground. Also make sure that your PCA10001 board has revision 2 or revision 3 of the nRF51822 chip. The first revision did not have SPI slave, only SPI master. The nRF51 compatibility matrix maps nRF51 chip markings with nRF51 chip revision.