Posted on July 03, 2015 at 10:08Hello everyone,
I made a custom bootloader for my stm32L1 but my problem resides in jumping at the beginning of the flash when my new binary file is loaded.
I made some research on this subject.. the PC and the MSP register need to be changed with the new address.
Here is the function I made to jump in memory but it doesn't work and I don't understand why..
t_error Jump_to_app(pFunction Jump_To_Application, uint32_t JumpAddress) {
if (((*(__IO uint32_t*) WRITE_START_ADDR) & 0x2FFE0000) == 0x20000000) {
JumpAddress = *(__IO uint32_t*) 0x08000004;
Jump_To_Application = (pFunction) JumpAddress;
__set_MSP_BOOT(*(__IO uint32_t*) 0x08000000);
Jump_To_Application();
} else {
return (NOK);
}
return (OK);
This function doesn't work but when I press the RESET button, the jump works and my binary is executed.. but I can't figure why this function doesn't do the magic..
I checked on the Eclipse debugger the value of the MSP register seems to be good : 00400120
Maybe the PC register is not modified.. I really have no ideas
If someone knows a way to made simples jump in memory using C, it would be very helpfull !!!
#stm32 #bootloader #c #jump
