bootloader_app_start() doesn't run newly flashed app

RE: bootloader_app_start() doesn't run newly flashed app

Konstantin — Mon, 18 Jul 2016 12:00:22 GMT

The problem is solved. The source of bug was spi init\deinit procedure. The NRF_SPIM1 module is used by either bootloade and app, so spi deinit is necessary for bootloader, but calling nrf_drv_spi_uninit() it seems was not enough. Subsequent call of spi_init() in app hangs CPU. Adding manual spi event reset solves the problem.

	FlashSpiReadStop();
	nrf_drv_spi_uninit(&AuxSpi);
	NRF_SPIM1->EVENTS_END = 0;
	NRF_SPIM1->EVENTS_ENDRX = 0;
	NRF_SPIM1->EVENTS_ENDTX = 0;
	NRF_SPIM1->EVENTS_STARTED = 0;
	NRF_SPIM1->EVENTS_STOPPED = 0;

May be the same behavior should be added in nrf_drv_spi.c

RE: bootloader_app_start() doesn't run newly flashed app

Hung Bui — Mon, 18 Jul 2016 11:13:18 GMT

@Konstantin: I just want to make sure you haven't modified the bootloader_app_start() function. You can test to debug your application and see what happens when you step through the application code when it inits.

Do you use any extra timer/peripheral in the bootloader that can trigger an interrupt in the period when the bootloader is closing and branching to the application that would not be handled ?

RE: bootloader_app_start() doesn't run newly flashed app

Konstantin — Mon, 18 Jul 2016 09:45:27 GMT

Hi, Hung Bui I use bootloader_app_start() directly (see the end of code in my post). This function will not return as it does the things you mentioned and jump to an app entry point. I have seen SPI bootloader example, but my project have different structure since it is SPI master. The problem still exists, so i'm trying to debug my application code from the bootloader project.

RE: bootloader_app_start() doesn't run newly flashed app

Hung Bui — Mon, 18 Jul 2016 08:58:14 GMT

@Konstantin: Have you made sure you have disabled the softdevice, and forwarded the interrupt vector table to the application as we do in the bootloader_app_start() function. Make sure the return error code is checked.

You can have a look at our example of SPI bootloader here.