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modify the sampling rate to increase the actual baud rate(drv_usart.c/drv_usart_v2.c)

This commit is contained in:
Eziotao 2023-04-03 13:12:48 +08:00 committed by Man, Jianting (Meco)
parent d6c1b75e42
commit ce346d798b
2 changed files with 8 additions and 1 deletions
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4
bsp/stm32/libraries/HAL_Drivers/drv_usart.c
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@ -108,7 +108,11 @@ static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_c
uart->handle.Instance = uart->config->Instance; uart->handle.Instance = uart->config->Instance;
uart->handle.Init.BaudRate = cfg->baud_rate; uart->handle.Init.BaudRate = cfg->baud_rate;
uart->handle.Init.Mode = UART_MODE_TX_RX; uart->handle.Init.Mode = UART_MODE_TX_RX;
#ifdef USART_CR1_OVER8
uart->handle.Init.OverSampling = cfg->baud_rate > 5000000 ? UART_OVERSAMPLING_8 : UART_OVERSAMPLING_16;
#else
uart->handle.Init.OverSampling = UART_OVERSAMPLING_16; uart->handle.Init.OverSampling = UART_OVERSAMPLING_16;
#endif /* USART_CR1_OVER8 */
switch (cfg->flowcontrol) switch (cfg->flowcontrol)
{ {

5
bsp/stm32/libraries/HAL_Drivers/drv_usart_v2.c
View File

@ -116,11 +116,14 @@ static rt_err_t stm32_configure(struct rt_serial_device *serial, struct serial_c
RT_ASSERT(cfg != RT_NULL); RT_ASSERT(cfg != RT_NULL);
uart = rt_container_of(serial, struct stm32_uart, serial); uart = rt_container_of(serial, struct stm32_uart, serial);
uart->handle.Instance = uart->config->Instance; uart->handle.Instance = uart->config->Instance;
uart->handle.Init.BaudRate = cfg->baud_rate; uart->handle.Init.BaudRate = cfg->baud_rate;
uart->handle.Init.Mode = UART_MODE_TX_RX; uart->handle.Init.Mode = UART_MODE_TX_RX;
#ifdef USART_CR1_OVER8
uart->handle.Init.OverSampling = cfg->baud_rate > 5000000 ? UART_OVERSAMPLING_8 : UART_OVERSAMPLING_16;
#else
uart->handle.Init.OverSampling = UART_OVERSAMPLING_16; uart->handle.Init.OverSampling = UART_OVERSAMPLING_16;
#endif /* USART_CR1_OVER8 */
switch (cfg->data_bits) switch (cfg->data_bits)
{ {