Posted on December 19, 2016 at 16:05Hello;
I am trying to implement FreeRTOS 9.0.0 and lwip2.0.0 with HAL library and GCC
For easiness I generated FreeRTOS code with STM32CubeMX and replaced FreeRTOS to 9.0.0 and then added LWIP.
I can ping my device without using debug options enabled.
to use debug output I wrote that write function:
/*Low layer write(output) function*/
__attribute__ ((used))
int _write(int file, char *ptr, int len)
{
HAL_UART_Transmit(&huart5, ptr, len, 0xff);
}
But I had problem with HAL_Delay function and couldn't figure out to get rid of it. (I read tried some solutions but didn't work)
Then I decided if I use write function without HAL_delay may solve my problem so I used :
int _write(int file, char *ptr, int len)
{
int i=0;
/* Transmit Data */
for (i = 0; i < len; i++) {
UART5->DR = (*ptr++ & (uint16_t)0x01FF);
while(UART5->SR & USART_SR_TC_Msk == RESET);
}
But it didn't work. (Didn't stuck either.)
How should I use printf function ?
#stm32f107 #printf #freertos #lwip #debug #usart
