BLE and TWI

[jc]

Hello, I've been trying to get my TWI device working in conjunction with the BLE stack (i.e. s110 softdevice is enabled) on a nRF51822.

I found another thread with an attached sd_twi_hw_master.c to demonstrate proper use of the PPI channels while the softdevice is enabled. However, I can't get twi_master_write() working. It always returns because:

while(NRF_TWI1->EVENTS_TXDSENT == 0 && (--timeout))

always results in a timeout.

Do I need to setup PPI channels to receive tx events? Cheers, -jc

[Håkon Alseth]

Hi,

That indicates that you are getting a NACK on the TWI-bus.

1. Are you sure you have the correct address to your slave?
2. Do you ever get the TXDSENT event?

I would recommend scoping the TWI-lines to see if there's something wrong with the sequence.

BR, -H

[Brook Gebremedhin]

@hkn

i don't find any where a working makefile that has twi and soft device enabled. can you direct me to a working makefile that has twi and softdvice together ? thanks