All Questions
Tagged with cortex-m bootloader
29
questions
1
vote
2
answers
94
views
VTOR not found in STM32F030
when attempting to jump to the bootloader App code address on an STM32F030 microcontroller . I cannot find the vector table offset register. Can anyone provide guidance on how to successfully perform ...
- 11
0
votes
0
answers
164
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Why VTOR in stm32 is set `SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET` instead `SCB->VTOR = FLASH_BASE + VECT_TAB_OFFSET`
Why do we use OR instead ADD in this code?
#ifdef VECT_TAB_SRAM
SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
SCB->VTOR = FLASH_BASE | ...
- 174
0
votes
1
answer
125
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Can you skip the bootloader with GCC/Cortex-M0+?
I'm writing fairly simple production test application for a small ARM Cortex-M0+ controller ATSAMD20J16. I'm using Microchip (Atmel) Studio 7 for this purpose. This will have a bootloader in ...
- 165
0
votes
0
answers
441
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Bootloader for ARM Cortex-M4F (SOLVED)
I'm trying to add a bootloader to an ATMEL ATSAME54N19A microcontroller (Cortex-M4F with 512 KB of flash). I'm using MPLAB IPE (Microchip's programming environment) and xc32 (Microchip's compiler ...
- 13
0
votes
1
answer
592
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Bootloader Jump Function. How to Jump to the right Address?
I am trying to create a bootloader that jumps to my application code on a MKE02Z32VFM4 (KEO2 Series from Freescale). I am working with the Keil IDE 5 and the Armv6 Compiler v6.16.
After Issuing the ...
- 31
5
votes
2
answers
1k
views
setting stack pointer before jumping to app from bootloader
I am coding a bootloader for Nucleo-F429ZI. I have two different STM32 projects, one for the bootloader itself and an application to jump from the bootloader.
Linker script for bootloader
MEMORY
{
...
3
votes
2
answers
527
views
Cortex-M0+ dual application/image linking
For most products, we implement a bootloader+application approach which uses an external SPI flash for storing different application versions. Upon startup, the bootloader checks if a new image is ...
- 984
0
votes
1
answer
160
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SAMD21 ecrypted firmware
I'am working on SAMD21, but now I'd like to implement the possibility to ecrupted firmware. Is it possible on the SAMD21? I find this pdf this is exactly what I want to do page 36 but this for SAM3/4 ...
- 1,214
2
votes
1
answer
529
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Cortex M7: Branch just after start
I'm using the ATSAMV71Q21B MCU which uses a cortex-M7 processor. In order to add redundancy, I would like to have multiple boot loader and enter to one of those boot loader just after starting the ...
- 93
1
vote
0
answers
38
views
Flashed bootloader successfully but device doesn't show up in device manager
I've successfully compiled and flashed the arduino samd bootloader onto a custom atsamd21 board. I am using an external crystal oscillator (32khz) so I am not using the -DCRYSTALLESS option.
Now that ...
- 356
2
votes
2
answers
403
views
Bootloader Strategy for Corrupt Applications
I've implemented a bootloader for a Kinetis ARM Cortex-M4 microcontroller.
The main application (starting at 0x10000) is re-programmed via the bootloader over a custom RS232 interface. I've ...
- 721
1
vote
1
answer
333
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Mysterious memory write protection
I'm implementing a serial bootloader on an ATSAME51N20A (Cortex-M4). I'm reading in packets over UART, and writing them to internal flash. For some memory addresses the flash writes work fine, and for ...
- 395
0
votes
1
answer
595
views
Bootloader and main application to share common code/functionalities
I'm struggling with a question in which I would like to get some help...
I have a Bootloader which can upload another application into my chip. In my case the Bootloader and the main application ...
1
vote
1
answer
1k
views
How can I debug a bootloader and application in the same GDB session on Cortex-M devices?
Classic setup: There is a bootloader, and application, compiled separately. If everything is right, the bootloader jumps on the application.
I attach a probe, run the gdbserver, start gdb with the ...
- 2,412
2
votes
2
answers
1k
views
Cortex M3 jump from application back to bootloader and back to application
I have a bootloader and a firmware where the initial jump from bootloader to firmware works like a charme but when I have the scenario jumping back from application, make some stuff and jump back to ...
- 23