RE: HCI Controller Only Build DFU

esisk — Tue, 12 Apr 2022 13:13:07 GMT

Exactly what I'm looking for, thanks Sigurd. I'll work on implementing it this morning and let you know if I encounter any problems

Edit: Haven't gotten it to work completely quite yet, but your answer solved the problem that I was asking about so I'll mark this as resolved

RE: HCI Controller Only Build DFU

Sigurd Hellesvik — Tue, 12 Apr 2022 12:59:52 GMT

This has been done for v1.4.0 in this unofficial fork of our github repo. Here the firmware on the 52840 will be updated in the following manner: cloud-->LTE-->nrf9160-->UART-->52840.

In order to repurpose the UART instance from HCI UART to DFU UART all you need to do is to change the callback handler. Simply call the following functions:

static struct device *uart_dev;
static struct device *uart_dev2; 
..
..
..
/*
    Setting initial callback handler
*/
uart_dev = device_get_binding("UART_x");
uart_irq_callback_set(uart_dev, uart_cb);
uart_irq_rx_enable(uart_dev);
..
..
..
/*
    Changing callback handler
*/
//uart_irq_rx_disable(uart_dev); // I tested without callig this, and it still worked
uart_dev2 = device_get_binding("UART_x");
uart_irq_callback_set(uart_dev2, uart_cb2);
uart_irq_rx_enable(uart_dev2);

Does this help you do what you want?

Regards,
Sigurd Hellesvik