diff options
Diffstat (limited to 'chip/stm32/uart.c')
| -rw-r--r-- | chip/stm32/uart.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/chip/stm32/uart.c b/chip/stm32/uart.c index 69dc7d26d2..2804b3153a 100644 --- a/chip/stm32/uart.c +++ b/chip/stm32/uart.c @@ -236,7 +236,12 @@ static void uart_freq_change(void) /* UART clocked from the main clock */ freq = clock_get_freq(); #endif + +#if (UARTN == 9) /* LPUART */ + div = DIV_ROUND_NEAREST(freq, CONFIG_UART_BAUD_RATE) * 256; +#else div = DIV_ROUND_NEAREST(freq, CONFIG_UART_BAUD_RATE); +#endif #if defined(CHIP_FAMILY_STM32L) || defined(CHIP_FAMILY_STM32F0) || \ defined(CHIP_FAMILY_STM32F3) || defined(CHIP_FAMILY_STM32L4) @@ -274,11 +279,14 @@ void uart_init(void) #endif /* UARTN */ #elif defined(CHIP_FAMILY_STM32L4) STM32_RCC_CCIPR |= (0x2 << STM32_RCC_CCIPR_USART1SEL_SHIFT); + STM32_RCC_CCIPR |= (0x2 << STM32_RCC_CCIPR_LPUART1SEL_SHIFT); #endif /* CHIP_FAMILY_STM32F0 || CHIP_FAMILY_STM32F3 */ /* Enable USART clock */ #if (UARTN == 1) STM32_RCC_APB2ENR |= STM32_RCC_PB2_USART1; +#elif (UARTN == 9) + STM32_RCC_APB1ENR2 |= STM32_RCC_APB1ENR2_LPUART1EN; #else STM32_RCC_APB1ENR |= CONCAT2(STM32_RCC_PB1_USART, UARTN); #endif |