SPI doesn't work with bootloader

RE: SPI doesn't work with bootloader

Hung Bui — Wed, 31 Aug 2016 14:32:33 GMT

Hi Stef,

I assume you use the GPIOTE_IRQ handler in the bootloader. If you do, you would need to have branching, it's the same with the handlers in my bootloader example(SWI0_IRQHandler_Bootloader, RTC1_IRQHandler_Bootloader, UART0_IRQHandler_Bootloader, GPIOTE_IRQHandler_Bootloader).

I think if you don't want to modify the driver's IRQ handler, what you can do is to modify the IRQ handler names in arm_startup_nrf51.s and then match the names accordingly in the interrupt_handler.c . This way you avoid declaring weak interrupt handler declare to for example GPIOTE_IRQHandler, and then use that in the driver files so you can keep file intact.

RE: SPI doesn't work with bootloader

Stef — Tue, 30 Aug 2016 15:49:50 GMT

Thanks, Hung Bui. That works! One followup question: Is there a way to blindly forward the vector table from 0x00000000 to the application without modifying the interrupt handler code in bootloader? I'm using the standard nRF libraries and drivers which already define interrupt handler (e.g., GPIOTE_IRQHandler code in app_gpiote.c). If I just redefine the GPIOTE_IRQHandler function in interrupt.c file, the compiler will complain about multiply defined GPIOTE_IRQHandler (which is true since I have two of them). To resolve this, I need to modify the GPIOTE_IRQHandler inside app_gpiote.c (rename it to GPIOTE_IRQHandler_Bootloader).

It will be good if I can leave the library/driver files as it is.

Thanks, -- Steven

RE: SPI doesn't work with bootloader

Hung Bui — Mon, 29 Aug 2016 14:25:37 GMT

Hi Steven,

I can see you move the MSP and the PC to the application, but I haven't seen you forward the vector table. Note that on Cortex M0 the vector table is fixed at 0x00000000. So you need to forward it manually.

You can test simply blinking a LED in your application to see if it's forwarded correctly or not.

You can find my code of forwarding the vector table in the case you quoted in your question (in interrupt_handler.c file)