# HG changeset patch
# User Ideenmodellierer
# Date 1730644855 -3600
# Node ID f72613a152dd4851f2413a631b09b433fd80b73f
# Parent  0d6c4b40fae420e14875958774ad8dd90d36a531
Switch external interface tx communication to DMA:
In the previous version the transmitting of data was done in polling mode. With the introduction of new sensors the length of commands send to the sensor may increase and have a impact to the runtim behavior of the SW. To avoid this the DMA transfers for TX has been activated.

diff -r 0d6c4b40fae4 -r f72613a152dd Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_uart.c
--- a/Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_uart.c	Sun Nov 03 15:37:00 2024 +0100
+++ b/Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_uart.c	Sun Nov 03 15:40:55 2024 +0100
@@ -182,8 +182,6 @@
 static void UART_EndRxTransfer(UART_HandleTypeDef *huart);
 static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
 static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
-static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
-static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
 static void UART_DMAError(DMA_HandleTypeDef *hdma); 
 static void UART_DMAAbortOnError(DMA_HandleTypeDef *hdma);
 static void UART_DMATxAbortCallback(DMA_HandleTypeDef *hdma);
@@ -896,7 +894,7 @@
     huart->hdmatx->XferCpltCallback = UART_DMATransmitCplt;
 
     /* Set the UART DMA Half transfer complete callback */
-    huart->hdmatx->XferHalfCpltCallback = UART_DMATxHalfCplt;
+    huart->hdmatx->XferHalfCpltCallback = NULL;
 
     /* Set the DMA error callback */
     huart->hdmatx->XferErrorCallback = UART_DMAError;
@@ -960,7 +958,7 @@
     huart->hdmarx->XferCpltCallback = UART_DMAReceiveCplt;
     
     /* Set the UART DMA Half transfer complete callback */
-    huart->hdmarx->XferHalfCpltCallback = UART_DMARxHalfCplt;
+    huart->hdmarx->XferHalfCpltCallback = NULL;
     
     /* Set the DMA error callback */
     huart->hdmarx->XferErrorCallback = UART_DMAError;
@@ -2012,6 +2010,7 @@
   }
 }
 
+#ifdef HALF_COMPLETE_NEEDED
 /**
   * @brief DMA UART transmit process half complete callback 
   * @param  hdma pointer to a DMA_HandleTypeDef structure that contains
@@ -2024,7 +2023,7 @@
 
   HAL_UART_TxHalfCpltCallback(huart);
 }
-
+#endif
 /**
   * @brief  DMA UART receive process complete callback. 
   * @param  hdma DMA handle
@@ -2058,12 +2057,14 @@
   *                the configuration information for the specified DMA module.
   * @retval None
   */
+#if 0
 static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
 {
   UART_HandleTypeDef* huart = (UART_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
 
   HAL_UART_RxHalfCpltCallback(huart); 
 }
+#endif
 
 /**
   * @brief  DMA UART communication error callback.
diff -r 0d6c4b40fae4 -r f72613a152dd Small_CPU/Inc/externalInterface.h
--- a/Small_CPU/Inc/externalInterface.h	Sun Nov 03 15:37:00 2024 +0100
+++ b/Small_CPU/Inc/externalInterface.h	Sun Nov 03 15:40:55 2024 +0100
@@ -49,7 +49,8 @@
 	EXT_INTERFACE_UART_OFF	= 0,
 	EXT_INTERFACE_UART_CO2,
 	EXT_INTERFACE_UART_SENTINEL,
-	EXT_INTERFACE_UART_O2
+	EXT_INTERFACE_UART_O2,
+	EXT_INTERFACE_UART_GNSS
 };
 
 
@@ -71,6 +72,12 @@
 	DETECTION_CO2_2,
 	DETECTION_CO2_3,
 #endif
+#ifdef ENABLE_GNSS_SUPPORT
+	DETECTION_GNSS_0,			/* check UART channel for connected gnss sensor */
+	DETECTION_GNSS_1,
+	DETECTION_GNSS_2,
+	DETECTION_GNSS_3,
+#endif
 #ifdef ENABLE_SENTINEL_MODE
 	DETECTION_SENTINEL,		/* check UART channel for connected Sentinel */
 	DETECTION_SENTINEL2,
diff -r 0d6c4b40fae4 -r f72613a152dd Small_CPU/Inc/uart.h
--- a/Small_CPU/Inc/uart.h	Sun Nov 03 15:37:00 2024 +0100
+++ b/Small_CPU/Inc/uart.h	Sun Nov 03 15:40:55 2024 +0100
@@ -25,7 +25,7 @@
 #include "stm32f4xx_hal.h"
 
 
-#define BUFFER_NODATA_LOW	('~')		/* The read function needs a signiture which indicates that no data for processing is available.*/
+#define BUFFER_NODATA_LOW	(0x15)		/* The read function needs a signiture which indicates that no data for processing is available.*/
 #define BUFFER_NODATA_HIGH  (0xA5)
 
 
@@ -53,6 +53,7 @@
 #ifdef ENABLE_SENTINEL_MODE
 void UART_HandleSentinelData(void);
 #endif
+void UART_clearRxBuffer(void);
 uint8_t UART_isCO2Connected();
 uint8_t UART_isSentinelConnected();
 void UART_setTargetChannel(uint8_t channel);
diff -r 0d6c4b40fae4 -r f72613a152dd Small_CPU/Src/externalInterface.c
--- a/Small_CPU/Src/externalInterface.c	Sun Nov 03 15:37:00 2024 +0100
+++ b/Small_CPU/Src/externalInterface.c	Sun Nov 03 15:40:55 2024 +0100
@@ -105,7 +105,6 @@
 	uint16_t coeff;
 	activeChannel = 0;
 	timeoutCnt = 0;
-	externalInterfacePresent = 0;
 	delayAdcConversion = 0;
 	if(externalInterface_StartConversion(activeChannel) == HAL_OK)
 	{
@@ -132,8 +131,6 @@
 {
 	uint8_t index = 0;
 	/* init data values */
-	externalV33_On = 0;
-	externalADC_On = 0;
 	externalUART_Protocol = 0;
 	externalCO2Value = 0;
 	externalCO2SignalStrength = 0;
@@ -216,7 +213,6 @@
 				}
 				timeoutCnt = 0;
 			}
-
 		}
 		if(timeoutCnt++ >= ADC_TIMEOUT)
 		{
@@ -382,6 +378,7 @@
 		case EXT_INTERFACE_UART_CO2:
 		case EXT_INTERFACE_UART_O2:
 		case EXT_INTERFACE_UART_SENTINEL:
+		case EXT_INTERFACE_UART_GNSS:
 				if((externalAutoDetect <= DETECTION_START)
 					|| ((protocol == EXT_INTERFACE_UART_O2) && (externalAutoDetect >= DETECTION_UARTMUX) && (externalAutoDetect <= DETECTION_DIGO2_3))
 
@@ -576,14 +573,14 @@
 
 	for(index2 = 0; index2 < MAX_ADC_CHANNEL; index2++)					/* Unmap old mirror instances */
 	{
-		if((pMap[index2] == SENSOR_DIGO2M) || (pMap[index2] == SENSOR_CO2M))
+		if((pMap[index2] == SENSOR_DIGO2M) || (pMap[index2] == SENSOR_CO2M) || (pMap[index2] == SENSOR_GNSSM))
 		{
 			pMap[index2] = SENSOR_NONE;
 		}
 	}
 
 	/* Map Mux O2 sensors to ADC Slot if ADC slot is not in use */
-	for(index = 0; index < EXT_INTERFACE_SENSOR_CNT-1; index++)
+	for(index = EXT_INTERFACE_MUX_OFFSET; index < EXT_INTERFACE_SENSOR_CNT-1; index++)
 	{
 		if(pMap[index] == SENSOR_DIGO2)
 		{
@@ -598,7 +595,7 @@
 			}
 		}
 	}
-	for(index = 0; index < EXT_INTERFACE_SENSOR_CNT-1; index++)
+	for(index = EXT_INTERFACE_MUX_OFFSET; index < EXT_INTERFACE_SENSOR_CNT-1; index++)
 	{
 		if(pMap[index] == SENSOR_CO2)
 		{
@@ -613,7 +610,7 @@
 			}
 		}
 	}
-	for(index = 0; index < EXT_INTERFACE_SENSOR_CNT-1; index++)
+	for(index = EXT_INTERFACE_MUX_OFFSET; index < EXT_INTERFACE_SENSOR_CNT-1; index++)
 	{
 		if(pMap[index] == SENSOR_GNSS)
 		{
@@ -659,10 +656,11 @@
 {
 	static uint8_t sensorIndex = 0;
 	static uint8_t uartMuxChannel = 0;
+#ifdef ENABLE_GNSS_SUPPORT
+static	uint8_t detectionDelayCnt = 0;
+#endif
 	uint8_t index = 0;
-#ifdef ENABLE_GNSS_SUPPORT
-	uint8_t detectionDelayCnt = 0;
-#endif
+
 	uint8_t cntSensor = 0;
 	uint8_t cntUARTSensor = 0;
 #ifdef ENABLE_CO2_SUPPORT
@@ -841,6 +839,7 @@
 #if defined ENABLE_SENTINEL_MODE || defined ENABLE_GNSS_SUPPORT
 #ifdef ENABLE_GNSS_SUPPORT
 										externalAutoDetect = DETECTION_GNSS_0;
+										externalInterface_SwitchUART(EXT_INTERFACE_UART_GNSS);
 #else
 #ifdef ENABLE_SENTINEL_MODE
 										externalAutoDetect = DETECTION_SENTINEL;
@@ -867,9 +866,8 @@
 										tmpSensorMap[EXT_INTERFACE_MUX_OFFSET] = SENSOR_GNSS;
 										externalInterface_SensorState[EXT_INTERFACE_MUX_OFFSET] = UART_COMMON_INIT;
 										externalInterface_CheckBaudrate(SENSOR_GNSS);
-										externalInterfaceMuxReqIntervall = 200;	/* iterations needed for module config */
-										detectionDelayCnt = 3;
-		//								uartGnss_SendCmd(GNSSCMD_MODE_POLL, cmdString, &cmdLength);
+										externalInterfaceMuxReqIntervall = 500;	/* iterations needed for module config */
+										detectionDelayCnt = 6;
 									}
 							break;
 			case DETECTION_GNSS_0:
@@ -1058,7 +1056,9 @@
 		{
 			index = 0;
 		}
-		if(((pmap[index + EXT_INTERFACE_MUX_OFFSET] == SENSOR_DIGO2) || (pmap[index + EXT_INTERFACE_MUX_OFFSET] == SENSOR_CO2) || (pmap[index + EXT_INTERFACE_MUX_OFFSET] == SENSOR_GNSS))
+		if(((pmap[index + EXT_INTERFACE_MUX_OFFSET] == SENSOR_DIGO2)
+				|| (pmap[index + EXT_INTERFACE_MUX_OFFSET] == SENSOR_CO2)
+				|| (pmap[index + EXT_INTERFACE_MUX_OFFSET] == SENSOR_GNSS))
 				&& (index != activeUartChannel))
 		{
 			newChannel = index;
@@ -1159,9 +1159,11 @@
 
 			if((externalInterface_SensorState[activeSensorId] == UART_O2_REQ_O2)		/* timeout */
 					|| (externalInterface_SensorState[activeSensorId] == UART_O2_REQ_RAW)
-					|| (externalInterface_SensorState[activeSensorId] == UART_CO2_OPERATING))
+					|| (externalInterface_SensorState[activeSensorId] == UART_CO2_OPERATING)
+					|| (externalInterface_SensorState[activeSensorId] == UART_GNSS_GET_PVT))
 			{
 				forceMuxChannel = 1;
+				externalInterface_SensorState[activeSensorId] = UART_O2_IDLE;
 				switch(pmap[activeSensorId])
 				{
 					case SENSOR_DIGO2: setExternalInterfaceChannel(activeSensorId,0.0);
diff -r 0d6c4b40fae4 -r f72613a152dd Small_CPU/Src/stm32f4xx_hal_msp_v3.c
--- a/Small_CPU/Src/stm32f4xx_hal_msp_v3.c	Sun Nov 03 15:37:00 2024 +0100
+++ b/Small_CPU/Src/stm32f4xx_hal_msp_v3.c	Sun Nov 03 15:40:55 2024 +0100
@@ -242,6 +242,9 @@
 
     GPIO_InitStruct.Pin = GPIO_PIN_10;
     HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+    HAL_NVIC_SetPriority(USART1_IRQn, 1, 3);
+    HAL_NVIC_EnableIRQ(USART1_IRQn);
   }
 }
 
diff -r 0d6c4b40fae4 -r f72613a152dd Small_CPU/Src/uart.c
--- a/Small_CPU/Src/uart.c	Sun Nov 03 15:37:00 2024 +0100
+++ b/Small_CPU/Src/uart.c	Sun Nov 03 15:40:55 2024 +0100
@@ -23,6 +23,7 @@
 #include "uartProtocol_O2.h"
 #include "uartProtocol_Co2.h"
 #include "uartProtocol_Sentinel.h"
+#include "uartProtocol_GNSS.h"
 #include "externalInterface.h"
 #include "data_exchange.h"
 #include <string.h>	/* memset */
@@ -31,9 +32,9 @@
 /* Private variables ---------------------------------------------------------*/
 
 
-
+#define TX_BUF_SIZE				(40u)		/* max length for commands */
 #define CHUNK_SIZE				(25u)		/* the DMA will handle chunk size transfers */
-#define CHUNKS_PER_BUFFER		(5u)
+#define CHUNKS_PER_BUFFER		(6u)
 
 
 
@@ -41,7 +42,7 @@
 
 uint8_t rxBuffer[CHUNK_SIZE * CHUNKS_PER_BUFFER];		/* The complete buffer has a X * chunk size to allow variations in buffer read time */
 uint8_t txBuffer[CHUNK_SIZE];							/* tx uses less bytes */
-uint8_t txBufferQue[CHUNK_SIZE];						/* In MUX mode command may be send shortly after each other => allow q 1 entry que */
+uint8_t txBufferQue[TX_BUF_SIZE];						/* In MUX mode command may be send shortly after each other => allow q 1 entry que */
 uint8_t txBufferQueLen;
 
 uint8_t rxBufferUart6[CHUNK_SIZE * CHUNKS_PER_BUFFER];		/* The complete buffer has a X * chunk size to allow variations in buffer read time */
@@ -54,11 +55,11 @@
 static uint8_t dmaTxActive;								/* Indicator if DMA reception needs to be started */
 
 
-
+static uint8_t isEndIndication(uint8_t index);
 
 /* Exported functions --------------------------------------------------------*/
 
-void clearRxBuffer(void)
+void UART_clearRxBuffer(void)
 {
 	uint16_t index = 0;
 	do
@@ -66,6 +67,9 @@
 		rxBuffer[index++] = BUFFER_NODATA_LOW;
 		rxBuffer[index++] = BUFFER_NODATA_HIGH;
 	} while (index < sizeof(rxBuffer));
+
+	rxReadIndex = 0;
+	rxWriteIndex = 0;
 }
 
 void MX_USART1_UART_Init(void)
@@ -84,10 +88,7 @@
 
   MX_USART1_DMA_Init();
 
-  HAL_NVIC_SetPriority(USART1_IRQn, 1, 3);
-  HAL_NVIC_EnableIRQ(USART1_IRQn);
-
-  clearRxBuffer();
+  UART_clearRxBuffer();
   rxReadIndex = 0;
   lastCmdIndex = 0;
   rxWriteIndex = 0;
@@ -286,7 +287,7 @@
 
 	if(dmaTxActive == 0)
 	{
-		if(cmdLength < CHUNK_SIZE)		/* A longer string is an indication for a missing 0 termination */
+		if(cmdLength < TX_BUF_SIZE)		/* A longer string is an indication for a missing 0 termination */
 		{
 			if(dmaRxActive == 0)
 			{
@@ -308,14 +309,17 @@
 
 void UART_SendCmdUbx(uint8_t *cmd, uint8_t len)
 {
-	if(len < CHUNK_SIZE)		/* A longer string is an indication for a missing 0 termination */
+	if(len < TX_BUF_SIZE)		/* A longer string is an indication for a missing 0 termination */
 	{
 		if(dmaRxActive == 0)
 		{
 			UART_StartDMA_Receiption();
 		}
 		memcpy(txBuffer, cmd, len);
-		HAL_UART_Transmit_DMA(&huart1,txBuffer,len);
+		if(HAL_OK == HAL_UART_Transmit_DMA(&huart1,txBuffer,len))
+		{
+			dmaTxActive = 1;
+		}
 	}
 }
 
@@ -350,38 +354,30 @@
 {
 	if(dmaRxActive == 0)
 	{
-		if(HAL_OK == HAL_UART_Receive_DMA (&huart1, &rxBuffer[rxWriteIndex], CHUNK_SIZE))
-		{
-			dmaRxActive = 1;
-		}
+    	if(((rxWriteIndex / CHUNK_SIZE) != (rxReadIndex / CHUNK_SIZE)) || ((isEndIndication(rxWriteIndex)) && (isEndIndication(rxWriteIndex + 1))))	/* start next transfer if we did not catch up with read index */
+    	{
+			if(HAL_OK == HAL_UART_Receive_DMA (&huart1, &rxBuffer[rxWriteIndex], CHUNK_SIZE))
+			{
+				dmaRxActive = 1;
+			}
+    	}
 	}
 }
 
 void UART_ChangeBaudrate(uint32_t newBaudrate)
 {
-	uint8_t dmaWasActive = dmaRxActive;
-//	HAL_DMA_Abort(&hdma_usart1_rx);
-		MX_USART1_UART_DeInit();
-		//HAL_UART_Abort(&huart1);
-		//HAL_DMA_DeInit(&hdma_usart1_rx);
-
-
-//	huart1.Instance->BRR = UART_BRR_SAMPLING8(HAL_RCC_GetPCLK2Freq()/2, newBaudrate);
+	MX_USART1_UART_DeInit();
 	huart1.Init.BaudRate = newBaudrate;
 	HAL_UART_Init(&huart1);
 	MX_USART1_DMA_Init();
 	HAL_NVIC_SetPriority(USART1_IRQn, 1, 3);
 	HAL_NVIC_EnableIRQ(USART1_IRQn);
 
-	if(dmaWasActive)
-	{
-		clearRxBuffer();
-		rxReadIndex = 0;
-		rxWriteIndex = 0;
-		dmaRxActive = 0;
-		txBufferQueLen = 0;
-		UART_StartDMA_Receiption();
-	}
+	UART_clearRxBuffer();
+	rxReadIndex = 0;
+	rxWriteIndex = 0;
+	dmaRxActive = 0;
+	txBufferQueLen = 0;
 }
 
 void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
@@ -394,10 +390,7 @@
     	{
     		rxWriteIndex = 0;
     	}
-    	if((rxWriteIndex / CHUNK_SIZE) != (rxReadIndex / CHUNK_SIZE) || (rxWriteIndex == rxReadIndex))	/* start next transfer if we did not catch up with read index */
-    	{
-			UART_StartDMA_Receiption();
-    	}
+		UART_StartDMA_Receiption();
     }
 }
 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
@@ -508,6 +501,11 @@
 		huart1.gState = HAL_UART_STATE_READY;
 		dmaTxActive = 0;
 	}
+	if(huart1.hdmarx->State == HAL_DMA_STATE_READY)
+	{
+		huart1.RxState = HAL_UART_STATE_READY;
+		dmaRxActive = 0;
+	}
 }
 
 void UART_FlushRxBuffer(void)