![]() OpenELEC-RPi.arm-4.95.1.img: x86 boot sector partition 1: ID=0xc, active, starthead 32, startsector 2048, 262145 sectors partition 2: ID=0x83, starthead 146, startsector 266240, 65537 sectors The solution is to mount the right partition from the image.Ĭheck that the image is indeed partitioned: $ file -k OpenELEC-RPi.arm-4.95.1.img These media are partitioned a similar way as a hard drive. The address could be unsuitable, the linker could be confused by demands put on it, but it should be apparent through inspection and basic validation.The obvious solution is to mount the image directly in Linux and make the changes but there is a small problem. If you set the vector table to a symbol it will no longer be dependent on editing a second file with a #define, it will simply get in the normal flow of the linker. What's not working about the symbol method? The linker should be establishing the addresses based on the linker script, and conveyed in the. You're loading new addresses, and jumping / branching to them. If you have firmware images located at multiple addresses you're going to have to navigate the MCU to those through some means of control transfer. When you change the table it will pull destination addresses for the assorted interrupts and handlers from this new table, look at what's in the table, and what the MCU is going to do with those.Īddresses in the table are ABSOLUTE, the Linker will have fixed them up, look at the output object files, dump them, disassemble them, and follow the anticipate route of code execution. When it starts it pulls values from the table, you can inspect them. The MCU is always going to use the vector table, the vector table needs to be on a correctly aligned address. ![]() Determine what it is doing at each step, and why, and if it's not what you expect, reflect on that a litte. Start from the BEGINNING, and focus less on where it ended up when it "failed". What DOES HAPPEN? These things don't operate via magic or random, the MCU operates in a very logical and sequenced way. The generated binary file kept its static reference, so It would not work on the second application slot at 0x8040000. elf files using the Arm GNU Toolchain arm-none-eabi-objcopy. I also tried generating a binary file from the. ![]() I also set the memory section to include both application slots :įLASH (rx) : ORIGIN = 0x8010000, LENGTH = 448KĮven if my binary file is loaded properly at address 0x8040000 as seen from STM32CubeProgrammer, the bootloader always jump to the application at location 0x8010000 or back to the bootloader at 0x8000000. ![]() For this, I commented the definition of USER_VECT_TAB_ADDRESS. I also tried setting SCB->VTOR in the application at SysInit. So far I tried setting the Vector Table Offset Register SCB->VTOR in the bootloader before modifying the reset handler that jumps to my application. bin files that sets dynamically the vector table offset so I don't have to create a binary file for every application slot by changing the USER_VECT_TAB_OFFSET and memory sections. After that, I can manually write the flash memory pages with the bin file values and then my bootloader jumps to this program.Īll this is working, allowing me to control which program my bootloader loads. So, I have to determine these two settings followed by building the application project to generate the bin file. Then I have to set the vector table offset in the application according to the flash location (system_stm32l4xx.c): Whereas the section from my linker script of my application is :įLASH (rx) : ORIGIN = 0x8010000, LENGTH = 192K or FLASH (rx) : ORIGIN = 0x8040000, LENGTH = 256K My memory sections are as follow (copied from the bootloader project) : Python Script - Feeds the generated binary file of my application to the bootloader.Applications - Application program for my project.Bootloader - Base program that jumps to one of my applications.My project consists of multiple components : I am creating a project with STM32CubeIDE for a STM32L4 microcontroller.
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