diff options
Diffstat (limited to 'chip/stm32/clock-stm32f.c')
| -rw-r--r-- | chip/stm32/clock-stm32f.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/chip/stm32/clock-stm32f.c b/chip/stm32/clock-stm32f.c index 76278c9c01..029c34bd09 100644 --- a/chip/stm32/clock-stm32f.c +++ b/chip/stm32/clock-stm32f.c @@ -265,6 +265,19 @@ int clock_get_freq(void) return CPU_CLOCK; } +void clock_wait_bus_cycles(enum bus_type bus, uint32_t cycles) +{ + volatile uint32_t dummy __attribute__((unused)); + + if (bus == BUS_AHB) { + while (cycles--) + dummy = STM32_DMA1_REGS->isr; + } else { /* APB */ + while (cycles--) + dummy = STM32_USART_BRR(STM32_USART1_BASE); + } +} + void clock_init(void) { /* |