Device Tree overlay ipc icmsg sample

[dario.sortino]

Hello everyone.

I was trying to integrate the ipc_service sample in my application. It was working all fine and I was able to set up and link the endpoint in my code. I then tried to run a clean build, and I don't know why everything broke: when I try to execute ipc_service_register_endpoint, this happens, the board resets and keeps doing it forever.

 

Thinking that is a matter of memory position, I found out that my compiled devicetree output for the application core has a reserved-memory node like this

reserved-memory {
        #address-cells = <1>;
        #size-cells = <1>;
        ranges;
        sram0_image: image@20000000 {
                reg = <0x20000000 DT_SIZE_K(448)>;
        };

        sram0_s: image_s@20000000 {
                reg = <0x20000000 0x40000>;
        };

        sram0_ns: image_ns@20040000 {
                reg = <0x20040000 0x30000>;
        };

        sram_rx: memory@20078000 {
                reg = <0x20078000 0x8000>;
        };

};

Instead of 

reserved-memory {
        sram_tx: memory@20070000 {
                reg = <0x20070000 0x8000>;
        };

        sram_rx: memory@20078000 {
                reg = <0x20078000 0x8000>;
        };

};

Network core side instead, the devicetree seems ok, but I still encounter the error at endpoint registration time.

I am quite lost and I don't really know how to proceed, since this problem appeared point-blank when I tried to build from zero once again.

[dario.sortino]

Hello, I've created overlays as in the sample.

I think that you are right in saying that the pristine build broke suddenly my application. If I remove the overlay (by not setting it in the CMake) that defines the ipc0, the initialization works fine, and the BUS FAULS won't appear.

So, where do I see how the ipc0 device is defined? I'm working with an nRF5340 DK. I don't get why the ipc_sample works perfectly on the DK, and my application that is replicating that structure fails: even if everything is initialized and works fine, in the end I cannot send messages from the network core to the application (ipc_service_send return code -2003).

My application consists in listening to incoming ESB messages in the network core, then I'd like to send the payload to the application core.