MCU BootloaderのトピックHardware Fault Interrupt when starting Application with Bootloader

Hardware Fault Interrupt when starting Application with Bootloader

sennivo — Tue, 21 Nov 2017 14:26:55 GMT

Hello I'm using fragments of the kboot for my own Bootloader. I'm using the jump_to_application(applicationAddress, stackPointer) function in the same way as you do. I get some strange behaviour now. If I start my application from the Bootloader the application is started correctly. If I just increase the size of a global Array of chars by one the application is not started anymore and it is stopped in an Hardware fault.

works with:

uint8_t wert[5];

does not work with:

uint8_t wert[4];

The problem seems to be in the zero initialize. The crash happens before reaching the main routine, in the Reset_Handler of the application. The System_init is called and executed correctly. The difference in the *.map file from the working version on the right of the picture and the non working on the left:

If I put the section to noInit in the target dialog it also works with the array of 4 Bytes. Might there be a problem with the aligning and how can I manage that?

Re: Hardware Fault Interrupt when starting Application with Bootloader

Hui_Ma — Thu, 23 Nov 2017 07:43:51 GMT

Hi,

Could you provide more detailed info about the hardware fault?

Please provide the ARM Cortex-M core SCB related registers info, when the hardware fault happened.

SCB_BFAR

SCB_CFSR

SCB_HFSR

SCB_DFSR

SCB_AFSR

SCB_SHCSR

best regards,

Mike

Re: Hardware Fault Interrupt when starting Application with Bootloader

jay_heng — Tue, 26 Dec 2017 02:25:56 GMT

This issue has nothing to do with bootloader, becase the app has been successfully jumpped to.

Please debug this issue and reach the position where hardfault happens, and share the realted assembly code with me, then we can analyze this issue further.