debug works in interrupt mode now, needs some refactoring, MBUSYield stops the whole system

cube/User/Inc/logger.h

@@ -3,8 +3,6 @@
 
 #include <main.h>
 
-// won't work so far
-// #define LOGGER_INTERRUPT
 
 typedef enum {
     LOG_HIGH,
@@ -29,14 +27,7 @@ int errMsg(const char *format, ...);
 
 int coloredMsg(const t_logColor color, const char *format, ...);
 
-// reads the ringbuffer and transfers data to output channel
-// call this from the idle-loop
-// return value can be ignored, it is only used in test
-int logExec();
-
-#ifdef LOGGER_INTERRUPT
-void mbusCommTxCpltCallback(UART_HandleTypeDef *huart);
-#endif
+void debugTxCpltCallback(UART_HandleTypeDef *huart);
 
 
 #endif // _LOGGER_H_

cube/User/Src/logger.c

@@ -25,6 +25,8 @@
 #endif // TEST
 
 
+uint8_t singleOctetTXBuffer;
+
 static ringbuffer_t logBuffer;
 
 void logInit() {
@@ -35,35 +37,15 @@ void logFree() {
     ringbufferFree(&logBuffer);
 }
 
-#ifdef LOGGER_INTERRUPT
-void mbusCommTxCpltCallback(UART_HandleTypeDef *huart) {
-    logExec();
-}
-#endif
-
-int logExec() {
-    int c = -1;
-#ifndef TEST
-    if (__HAL_UART_GET_FLAG(&debugUart, UART_FLAG_TXE)) { // is the TX channel free
-#endif // TEST
-        c = ringbufferGetOne(&logBuffer);
+void debugTxCpltCallback(UART_HandleTypeDef *huart) {
+    int c = ringbufferGetOne(&logBuffer);
     if (c > 0) {
-#ifndef TEST
-            // transfer to TX channel
-            uint8_t cc = (uint8_t) c;
-#ifndef LOGGER_INTERRUPT            
-            HAL_UART_Transmit(&debugUart, &cc, 1, HAL_MAX_DELAY);
-#else
-            HAL_UART_Transmit_IT(&debugUart, &cc, 1);
-#endif // LOGGER_INTERRUPT
-#endif // TEST
+        singleOctetTXBuffer = (uint8_t) c;
+        HAL_UART_Transmit_IT(&debugUart, &singleOctetTXBuffer, 1);
     }
-#ifndef TEST        
-    }
-#endif // TEST
-    return c;
 }
 
+
 #ifndef TEST
 static void flashGreenLed(void *handle) {
     show(LED_GREEN, TOGGLE);
@@ -87,7 +69,12 @@ static int innerLogMsg(const char *pre, const char *post, const char *format, va
             strcat(msgBuffer, post);
         }
 
-        if (-1 == (res = ringbufferPut(&logBuffer, (uint8_t*) msgBuffer, strlen(msgBuffer)))) {
+
+        HAL_NVIC_DisableIRQ(UART4_IRQn);
+        res = ringbufferPut(&logBuffer, (uint8_t*) msgBuffer, strlen(msgBuffer));
+        HAL_NVIC_EnableIRQ(UART4_IRQn);
+
+        if (-1 == res) {
 #ifndef TEST
             // blink the green light or so
             flashGreenLed(NULL);
@@ -96,6 +83,7 @@ static int innerLogMsg(const char *pre, const char *post, const char *format, va
             printf("\n*** green blink ***\n");
 #endif // TEST                
         }
+        debugTxCpltCallback(NULL);
     }
     return res;
 }

cube/User/Src/main2.c

@@ -206,7 +206,6 @@ void my_loop() {
     show(DEBUG_1, TOGGLE);
 
     schExec();
-    logExec();
 }
 
 void SYSTICK_Callback() {
@@ -214,7 +213,7 @@ void SYSTICK_Callback() {
     schUpdate();
 
     // MQTT Interface
-    MilliTimer_Handler();
+    // MilliTimer_Handler();
 }
 
 void HAL_GPIO_EXTI_Callback(uint16_t pin) {
@@ -232,12 +231,9 @@ void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) {
 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
     if (huart == &mbusUart) {
         mbusCommTxCpltCallback(huart);
-    } 
-#ifdef LOGGER_INTERRUPT    
-    else if (huart == &debugUart) {
+    } else if (huart == &debugUart) {
         debugTxCpltCallback(huart);
     }
-#endif    
 }
 
 void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) {

cube/User/Src/mqttComm.c

@@ -2,6 +2,7 @@
 #include <logger.h>
 #include <PontCoopScheduler.h>
 #include <wizHelper.h>
+#include <show.h>
 
 #include <stdint.h>
 #include <string.h>
@@ -61,7 +62,10 @@ static void messageArrived(MessageData* md)
 }
 
 static void mqttHandler(void *handle) {
-//    MQTTYield(&mqttClient, data.keepAliveInterval);
+    show(DEBUG_2, ON);
+    MQTTYield(&mqttClient, data.keepAliveInterval);
+    show(DEBUG_2, OFF);
+
 }
 
 void mqttCommInit(void *handle) {