T-TWR Plus fails to complete the boot sequence when SA868 uses NiceRF firmware about openrtx

[silseva]

Hi!
We currently do not support the original SA868 firmware, this is why it fails to detect it. In the future we'll show an error message on the screen to inform the user about this.

[lyusupov]

@silseva

We currently do not support the original SA868 firmware

It's Ok.
I mean that wrong or missing RF module should not block the boot sequence, right ?

Looks like we will stay in the loop all the time when there is no 'OK' response or baud rate of the poll is different from the baud rate of a module.
https://github.com/OpenRTX/OpenRTX/blob/master/platform/drivers/baseband/SA8x8.c#L98-L112

static inline void waitUntilReady()
{
    char buf[SA8X8_MSG_SIZE] = { 0 };

    while(true)
    {
        uartPrint("AT\r\n");
        int ret = k_msgq_get(&uart_msgq, buf, K_MSEC(250));
        if(ret != 0)
            printk("SA8x8: baseband is not ready!\n");

        if(strncmp(buf, "OK\r", SA8X8_MSG_SIZE) == 0)
            break;
    }
}

Shouldn't it be a timed loop instead ?

[silseva]

Sure, it has to be changed to a timed loop. I did it yesterday but then the radio seems to hang somewhere else, I have to investigate more.

[lewisxhe]

@lyusupov The version you have also supports SA868 firmware written to openRTX, but it cannot be restored to the original firmware.

[lyusupov]

@lewisxhe
Sure! But I am not ready to erase genuine SA868 firmware right now.
For the purpose of SoftRF project compatibility - I still need it until OpenRTX one will support the same functions that genuine firmware has.