nRF53/nrfx: How to do Inter Processor Communication?

[Andre]

I wish to develop a bare metal application (without Zephyr) on the nRF5340.

For this purpose I am unable to find the documentation how to perform Inter Processor Communication.

So far I am trying

#include "nrf.h"
#include "nrfx.h"
#include "nrfx_ipc.h"
#include "nrf_reset.h"

void app_ipc_handler(uint32_t event_mask, void * p_context){
}


int main(void) {
	nrf_reset_network_force_off(NRF_RESET, false);
    nrfx_ipc_init(6, app_ipc_handler, NULL);
    NVIC_EnableIRQ(IPC_IRQn);
    for (int i = 0 ; i < IPC_CH_NUM; i++) {
        nrfx_ipc_receive_event_channel_assign(i,i);
        nrfx_ipc_receive_event_enable(i);
    }
    int i = 0;
    while(1) {
        if (i) // I'll put a breakpoint here and set i to trigger sending a signal 
            nrfx_ipc_signal(i);
        i=0;
    }
}

void net_ipc_handler(uint32_t event_mask, void * p_context){
}

int main(void) {
    nrfx_ipc_init(6, net_ipc_handler, NULL);
    NVIC_EnableIRQ(IPC_IRQn);
    for (int i = 0 ; i < IPC_CH_NUM; i++) {
        nrfx_ipc_receive_event_channel_assign(i,i);
        nrfx_ipc_receive_event_enable(i);
    }

    while(1);
}

However, net_ipc_handler() gets never called. 

What is the proper way do Inter Processor Communication?

[haakonsh]

What's your SDK? Or are you just using an MDK + NRFX drivers? If so what versions? 

[Andre]

I am using nrfx v2.3.0.