f405: ensure CCMRAM is enabled
@@ -259,6 +259,7 @@ void SystemInit() {
SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
+ __HAL_RCC_CCMDATARAMEN_CLK_ENABLE();
__HAL_FLASH_PREFETCH_BUFFER_ENABLE();
__HAL_FLASH_INSTRUCTION_CACHE_ENABLE();
__HAL_FLASH_DATA_CACHE_ENABLE();
