diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c')
| -rw-r--r-- | nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c b/nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c index 45980f288..c6c0b2382 100644 --- a/nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c +++ b/nuttx/arch/arm/src/stm32/stm32f40xxx_rcc.c @@ -633,7 +633,11 @@ static void stm32_stdclockconfig(void) /* Enable FLASH prefetch, instruction cache, data cache, and 5 wait states */ +#ifdef STM32_FLASH_PREFETCH + regval = (FLASH_ACR_LATENCY_5 | FLASH_ACR_ICEN | FLASH_ACR_DCEN | FLASH_ACR_PRFTEN); +#else regval = (FLASH_ACR_LATENCY_5 | FLASH_ACR_ICEN | FLASH_ACR_DCEN); +#endif putreg32(regval, STM32_FLASH_ACR); /* Select the main PLL as system clock source */ |