diff options
Diffstat (limited to 'chip/stm32/crc_hw.h')
| -rw-r--r-- | chip/stm32/crc_hw.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/chip/stm32/crc_hw.h b/chip/stm32/crc_hw.h index c1a97da842..edaf3b5d32 100644 --- a/chip/stm32/crc_hw.h +++ b/chip/stm32/crc_hw.h @@ -7,12 +7,15 @@ #define _CRC_HW_H /* CRC-32 hardware implementation with USB constants */ +#include "clock.h" #include "registers.h" static inline void crc32_init(void) { /* switch on CRC controller */ STM32_RCC_AHBENR |= 1 << 6; /* switch on CRC controller */ + /* Delay 1 AHB clock cycle after the clock is enabled */ + clock_wait_bus_cycles(BUS_AHB, 1); /* reset CRC state */ STM32_CRC_CR = STM32_CRC_CR_RESET | STM32_CRC_CR_REV_OUT | STM32_CRC_CR_REV_IN_WORD; |