Posted on June 14, 2016 at 14:38Hello!
I am working in a project that I want to use a custom bootloader for firmware update of stm32f407, I had developed for stm32f107 and all works fine, but for STM32F407 I getting some problems.
Below I posted the source code of the bootloader, debugging this code when execute this line ''if (((*(__IO uint32_t*)ApplicationAddress) & 0x2FFE0000 ) == 0x20000000) '' always return 0, I don't know why this occur because in application firmware I defined ''&sharpdefine VECT_TAB_OFFSET 0x8000'' all looks correct but never enter if condition and execute Jump_To_Application.
On Flash address (0x80E0000) is located the firmware for update the firmware on address (0x8008000).
Bootloader.c
&sharpdefine ApplicationAddress (0x8008000)
&sharpdefine ApplicationAddress_Firmware (0x80E0000)
typedef void (*pFunction)(void);
uint32_t JumpAddress;
pFunction Jump_To_Application;
/*----------------------------------------------------------------------------
Main Thread 'main': Run Network
*---------------------------------------------------------------------------*/
int main (void) {
uint8_t* App_ptr;
SystemClock_Config();//initialize clocks
BKP_Init();
if (HAL_RTCEx_BKUPRead(&hrtc, RTC_BKP_DR6) == 0xA5A5){
if (((*(__IO uint32_t*)ApplicationAddress_Firmware) & 0x2FFE0000 ) == 0x20000000)
{
/* Jump to user application */
JumpAddress = *(__IO uint32_t*) (ApplicationAddress_Firmware + 4);
Jump_To_Application = (pFunction) JumpAddress;
App_ptr = (uint8_t*)Jump_To_Application;
if( (*App_ptr != 0xFF) && (App_ptr) )
{
/* Initialise user application's Stack Pointer */
__set_MSP(*(__IO uint32_t*) ApplicationAddress_Firmware);
Jump_To_Application();
}
}
}else{
if (((*(__IO uint32_t*)ApplicationAddress) & 0x2FFE0000 ) == 0x20000000)
{
/* Jump to user application */
JumpAddress = *(__IO uint32_t*) (ApplicationAddress + 4);
Jump_To_Application = (pFunction) JumpAddress;
App_ptr = (uint8_t*)Jump_To_Application;
if( (*App_ptr != 0xFF) && (App_ptr) )
{
/* Initialise user application's Stack Pointer */
__set_MSP(*(__IO uint32_t*) ApplicationAddress);
Jump_To_Application();
}
}
}
}
Another think is the Scatter file looks good.
Bootloader Scatter File
; *************************************************************
; *** Scatter-Loading Description File generated by uVision ***
; *************************************************************
LR_IROM1 0x08000000 0x00007FFF { ; load region size_region
ER_IROM1 0x08000000 0x00007FFF { ; load address = execution address
*.o (RESET, +First)
*(InRoot$$Sections)
.ANY (+RO)
}
RW_IRAM1 0x20000000 0x00020000 { ; RW data
.ANY (+RW +ZI)
}
RW_IRAM2 0x10000000 UNINIT 0x00010000 {
.ANY (+RW +ZI)
}
}
Application Scatter File
; *************************************************************
; *** Scatter-Loading Description File ***
; *************************************************************
LR_IROM1 0x08008000 0x000D7FFF { ; load region size_region
ER_IROM1 0x08008000 0x000D7FFF { ; load address = execution address
*.o (RESET, +First)
*(InRoot$$Sections)
.ANY (+RO)
}
RW_IRAM1 0x20000000 0x00020000 { ; RW data
.ANY (+RW +ZI)
}
RW_IRAM2 0x10000000 UNINIT 0x00010000 {
.ANY (+RW +ZI)
}
}
Thanks,
Giovani
#stm32-stm32f4-bootloader
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