diff options
Diffstat (limited to 'os/hal')
-rw-r--r-- | os/hal/platforms/STM32F4xx/hal_lld.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/os/hal/platforms/STM32F4xx/hal_lld.c b/os/hal/platforms/STM32F4xx/hal_lld.c index e3cf144e1..521a1723a 100644 --- a/os/hal/platforms/STM32F4xx/hal_lld.c +++ b/os/hal/platforms/STM32F4xx/hal_lld.c @@ -208,9 +208,14 @@ void stm32_clock_init(void) { RCC->CFGR |= STM32_MCO2PRE | STM32_MCO2SEL | STM32_MCO1PRE | STM32_MCO1SEL |
STM32_RTCPRE | STM32_PPRE2 | STM32_PPRE1 | STM32_HPRE;
- /* Flash setup.*/
- FLASH->ACR = FLASH_ACR_PRFTEN | FLASH_ACR_ICEN | FLASH_ACR_DCEN |
- STM32_FLASHBITS;
+ /* Flash setup.
+ Some old revisions of F4x MCUs randomly crashes with compiler
+ optimizations enabled AND flash caches enabled. */
+ if ((DBGMCU->IDCODE == 0x20006411) && (SCB->CPUID == 0x410FC241))
+ FLASH->ACR = FLASH_ACR_PRFTEN | STM32_FLASHBITS;
+ else
+ FLASH->ACR = FLASH_ACR_PRFTEN | FLASH_ACR_ICEN |
+ FLASH_ACR_DCEN | STM32_FLASHBITS;
/* Switching to the configured clock source if it is different from MSI.*/
#if (STM32_SW != STM32_SW_HSI)
|