Remove UART DMA and use only semaphore and blocking transmit

Core/Src/main.c

@@ -87,22 +87,17 @@ int _write(int file, char *ptr, int len)
   return len;
 }
 
-#ifndef DEBUG_ITM
+#ifndef DEBUG_ITW
 #include <stdio.h>
 #include <stdarg.h>
 
 extern osSemaphoreId_t xUARTDMASemaphore;
-extern osMutexId_t debugPrintMutex;
 
 void uart_debug_print(const char *fmt, ...)
 {
   if (huart1.gState == HAL_UART_STATE_RESET) return;
 
-  if (osKernelGetState() == osKernelRunning)
-  {
-    osMutexAcquire(debugPrintMutex, osWaitForever);
-    osSemaphoreAcquire(xUARTDMASemaphore, osWaitForever);
-  }
+  if (osKernelGetState() == osKernelRunning) osSemaphoreAcquire(xUARTDMASemaphore, osWaitForever);
 
   char buf[128];
   va_list args;
@@ -113,11 +108,7 @@ void uart_debug_print(const char *fmt, ...)
 
   if (len > 0) HAL_UART_Transmit(&huart1, (uint8_t*)buf, len, 100);
 
-  if (osKernelGetState() == osKernelRunning)
-  {
-    osSemaphoreRelease(xUARTDMASemaphore);
-    osMutexRelease(debugPrintMutex);
-  }
+  if (osKernelGetState() == osKernelRunning) osSemaphoreRelease(xUARTDMASemaphore);
 }
 #endif
 /* USER CODE END PF */