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Code Issues Wiki Activity

Fixed possibility of getting stuck in F7 bootloader mode (#5370)

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This commit is contained in:
Andrey Mironov 2018-03-04 12:45:40 +03:00 • committed by Michael Keller
parent 2f8e59f8fc
commit a24daa78d0
1 changed files with 3 additions and 0 deletions
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3
src/main/drivers/system_stm32f7xx.c
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@ -197,6 +197,9 @@ void checkForBootLoaderRequest(void)
bt = (*(__IO uint32_t *) (BKPSRAM_BASE + 4)) ; bt = (*(__IO uint32_t *) (BKPSRAM_BASE + 4)) ;
if ( bt == 0xDEADBEEF ) { if ( bt == 0xDEADBEEF ) {
(*(__IO uint32_t *) (BKPSRAM_BASE + 4)) = 0xCAFEFEED; // Reset our trigger (*(__IO uint32_t *) (BKPSRAM_BASE + 4)) = 0xCAFEFEED; // Reset our trigger
// Backup SRAM is write-back by default, ensure value actually reaches memory
// Another solution would be marking BKPSRAM as write-through in Memory Protection Unit settings
SCB_CleanDCache_by_Addr((uint32_t *) (BKPSRAM_BASE + 4), sizeof(uint32_t));
void (*SysMemBootJump)(void); void (*SysMemBootJump)(void);
__SYSCFG_CLK_ENABLE(); __SYSCFG_CLK_ENABLE();