RT-Thread Version
master
Hardware Type/Architectures
H730 with internal flash
Develop Toolchain
MDK Keil
Describe the bug
在主频550M，打开优化时，使用rt_kprintf只能打出首字符。
调查发现在stm32的serial_v1驱动中，会使用一个较为硬编码（由库中define）的值检查是否发送超时。在主频较高且波特率较低时可能会触发。
|
static int stm32_putc(struct rt_serial_device *serial, char c) |
|
{ |
|
struct stm32_uart *uart; |
|
RT_ASSERT(serial != RT_NULL); |
|
|
|
uart = rt_container_of(serial, struct stm32_uart, serial); |
|
rt_uint32_t block_timeout = uart->tx_block_timeout; |
|
UART_INSTANCE_CLEAR_FUNCTION(&(uart->handle), UART_FLAG_TC); |
|
#if defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32WL) || defined(SOC_SERIES_STM32F7) || defined(SOC_SERIES_STM32F0) \ |
|
|| defined(SOC_SERIES_STM32L0) || defined(SOC_SERIES_STM32G0) || defined(SOC_SERIES_STM32H7) || defined(SOC_SERIES_STM32L5) \ |
|
|| defined(SOC_SERIES_STM32G4) || defined(SOC_SERIES_STM32MP1) || defined(SOC_SERIES_STM32WB) || defined(SOC_SERIES_STM32F3) \ |
|
|| defined(SOC_SERIES_STM32U5) || defined(SOC_SERIES_STM32H5) || defined(SOC_SERIES_STM32H7RS) |
|
uart->handle.Instance->TDR = c; |
|
#else |
|
uart->handle.Instance->DR = c; |
|
#endif |
|
while (__HAL_UART_GET_FLAG(&(uart->handle), UART_FLAG_TC) == RESET && --block_timeout); |
|
return (block_timeout != 0) ? 1 : -1; |
而
rt_kpinrtf调用
_kputs发送时未处理
rt_device_write的返回值，没有重发。
|
static void _kputs(const char *str, long len) |
|
{ |
|
#ifdef RT_USING_DEVICE |
|
rt_device_t console_device = rt_console_get_device(); |
|
#endif /* RT_USING_DEVICE */ |
|
|
|
CONSOLE_TAKE; |
|
|
|
#ifdef RT_USING_DEVICE |
|
if (console_device == RT_NULL) |
|
{ |
|
rt_hw_console_output(str); |
|
} |
|
else |
|
{ |
|
rt_device_write(console_device, 0, str, len); |
|
} |
|
#else |
|
RT_UNUSED(len); |
|
rt_hw_console_output(str); |
|
#endif /* RT_USING_DEVICE */ |
|
|
|
CONSOLE_RELEASE; |
|
} |
相关PR：#9543
这个PR把代码改正确了，但是导致了这个问题 改回去会导致没发完就接着发中间缺字符🤦♂️
Other additional context
No response
