implement uart connection for logger

cube/User/Src/logger.c

@@ -1,6 +1,8 @@
 #ifndef TEST
 #include <main.h>
 #include <usart.h>
+#include <led.h>
+#include <PontCoopScheduler.h>
 #endif
 
 #include <stdint.h>
@@ -33,15 +35,17 @@ void logFree() {
     ringbufferFree(&logBuffer);
 }
 
-int logExecute() {
+int logExec() {
     int c = -1;
 #ifndef TEST
-    if (false) { // is the TX channel free
+    if (__HAL_UART_GET_FLAG(&debugUart, UART_FLAG_TXE)) { // is the TX channel free
 #endif // TEST
         c = ringbufferGetOne(&logBuffer);
         if (c > 0) {
 #ifndef TEST
             // transfer to TX channel
+            uint8_t cc = (uint8_t) c;
+            HAL_UART_Transmit(&debugUart, &cc, 1, HAL_MAX_DELAY);
 #endif // TEST
         }
 #ifndef TEST        
@@ -50,14 +54,22 @@ int logExecute() {
     return c;
 }
 
+#ifndef TEST
+static void flashGreenLed(void *handle) {
+    led(GREEN, TOGGLE);
+}
+#endif // TEST
+
 int logMsg(char *msg) {
     int res = -1;
 
-    if (-1 == (res = ringbufferPut(&logBuffer, msg, strlen(msg)))) {
+    if (-1 == (res = ringbufferPut(&logBuffer, (uint8_t*) msg, strlen(msg)))) {
 #ifndef TEST
-        // blink the red light or so
+        // blink the green light or so
+        flashGreenLed(NULL);
+        schAdd(flashGreenLed, NULL, 100, 0);
 #else
-        printf("\n*** red blink ***\n");
+        printf("\n*** green blink ***\n");
 #endif // TEST                
     }