Change DFU start address and application start address

RE: Change DFU start address and application start address

Kadi Chang — Wed, 26 Nov 2014 01:50:56 GMT

The cortex_m0's Interrupt Vector Table is always fix in the 0x0000,cortex_m3 can change the vector table offset. I will try to modify the boot interrupt function to handle the app interrupt function call.

RE: Change DFU start address and application start address

Kadi Chang — Wed, 26 Nov 2014 00:21:06 GMT

I used the nRF51422(not use the RF part) for the small device,the device need to update the application by the customer. So,I try to divide the 51422 for two part: 1.bootlader,address 0x0000,base on DFU; 2.Application,address 0x8000,for normal work,like Led and LCM display; Our other device use the STM32,STM32 is work very good. I try to do the same in the 51422,but it not work good as STM32. I am know well in the IAR,but i switch the project to IAR,the application still not work. The application may has associate with the start address,if I change the application from 0x8000 to 0x0000,the RTC0 IRQ is work. Could you try to modify the RTC_example from 0x8000?

RE: Change DFU start address and application start address

Stefan Birnir Sverrisson — Tue, 25 Nov 2014 15:04:07 GMT

I am still quite puzzled about what you are trying to achieve. If you want to make an RTC IRQ work, then there is an example for that in the rtc_example in the nRF51 SDK and e.g. here.

RE: Change DFU start address and application start address

Kadi Chang — Tue, 25 Nov 2014 00:20:05 GMT

Hi I had modify the dfu_types.h and keil,it still not correct. I check the RTC0 's register, it has correct interrupt event, but the main loop did not jump to RTC0 IRQ. I also check the map file from keil,the RTC0 IRQ is local in the correct address(after the 0x8000)

Map file info startup_arm_nrf51.o(RESET) refers to nrf51_it.o(i.RTC0_IRQHandler) for RTC0_IRQHandler

i.RTC0_IRQHandler 0x00008184 Section 0 nrf51_it.o(i.RTC0_IRQHandler)

RTC0_IRQHandler 0x00008185 Thumb Code 34 nrf51_it.o(i.RTC0_IRQHandler)

0x00008184 0x0000002c Code RO 254 i.RTC0_IRQHandler nrf51_it.o

RE: Change DFU start address and application start address

Stefan Birnir Sverrisson — Mon, 24 Nov 2014 14:23:40 GMT

I am not exactly sure what you are trying to do but you can change the start address for the bootloader by modifying the BOOTLOADER_REGION_START constant in dfu_types.h file in the bootloader project in the nRF51 SDK. You should also modify the IROM Start and Size addresses accordingly in KEIL ->Options for Target -> Target