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view Small_CPU/Src/uart.c @ 922:7c996354b8ac Evo_2_23

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Moved UART6 into a separate unit: UART6 connects internal devices. As a first step the existing code sections have been moved into a new unit. As well the code of the external GNSS sensor has been copied into this unit as starting point for the further development. Later the internal part can be integrated into the common uart (code cleanup).
author Ideenmodellierer
date Sun, 03 Nov 2024 20:53:05 +0100
parents eb4109d7d1e9
children effadaa3a1f7
line wrap: on
line source

/**
  ******************************************************************************
  * @file    uart.c 
  * @author  heinrichs weikamp gmbh
  * @version V0.0.1
  * @date    27-March-2014
  * @brief   button control
  *           
  @verbatim                 
  ============================================================================== 
                        ##### How to use #####
  ============================================================================== 
  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */ 
/* Includes ------------------------------------------------------------------*/
#include "uart.h"
#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 */

#ifdef ENABLE_GPIO_V2
extern UART_HandleTypeDef huart6;
extern void UART6_RxCpltCallback(UART_HandleTypeDef *huart);
extern void UART6_TxCpltCallback(UART_HandleTypeDef *huart);
#endif

/* 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		(6u)



DMA_HandleTypeDef  hdma_usart1_rx, hdma_usart1_tx;

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[TX_BUF_SIZE];						/* In MUX mode command may be send shortly after each other => allow q 1 entry que */
uint8_t txBufferQueLen;

static uint8_t rxWriteIndex;							/* Index of the data item which is analysed */
static uint8_t rxReadIndex;								/* Index at which new data is stared */
static uint8_t lastCmdIndex;							/* Index of last command which has not been completely received */
static uint8_t dmaRxActive;								/* Indicator if DMA reception needs to be started */
static uint8_t dmaTxActive;								/* Indicator if DMA reception needs to be started */

static uint32_t LastCmdRequestTick = 0;					/* Used by ADC handler to avoid interferance with UART communication */

static uint8_t isEndIndication(uint8_t index);

/* Exported functions --------------------------------------------------------*/

void UART_clearRxBuffer(void)
{
	uint16_t index = 0;
	do
	{
		rxBuffer[index++] = BUFFER_NODATA_LOW;
		rxBuffer[index++] = BUFFER_NODATA_HIGH;
	} while (index < sizeof(rxBuffer));

	rxReadIndex = 0;
	rxWriteIndex = 0;
}

void MX_USART1_UART_Init(void)
{
/* regular init */	
  huart1.Instance = USART1;
  huart1.Init.BaudRate = 19200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;

  HAL_UART_Init(&huart1);

  MX_USART1_DMA_Init();

  UART_clearRxBuffer();
  rxReadIndex = 0;
  lastCmdIndex = 0;
  rxWriteIndex = 0;
  dmaRxActive = 0;
  dmaTxActive = 0;
  txBufferQueLen = 0;
}



void MX_USART1_UART_DeInit(void)
{
	HAL_DMA_Abort(&hdma_usart1_rx);
	HAL_DMA_DeInit(&hdma_usart1_rx);
	HAL_DMA_Abort(&hdma_usart1_tx);
	HAL_DMA_DeInit(&hdma_usart1_tx);
	HAL_UART_DeInit(&huart1);
	dmaRxActive = 0;
	dmaTxActive = 0;
	txBufferQueLen = 0;
}

void  MX_USART1_DMA_Init()
{
  /* DMA controller clock enable */
  __DMA2_CLK_ENABLE();

  /* Peripheral DMA init*/
  hdma_usart1_rx.Instance = DMA2_Stream5;
  hdma_usart1_rx.Init.Channel = DMA_CHANNEL_4;
  hdma_usart1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY; //DMA_MEMORY_TO_PERIPH;
  hdma_usart1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_usart1_rx.Init.MemInc = DMA_MINC_ENABLE;
  hdma_usart1_rx.Init.PeriphDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_usart1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_usart1_rx.Init.Mode = DMA_NORMAL;
  hdma_usart1_rx.Init.Priority = DMA_PRIORITY_LOW;
  hdma_usart1_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  HAL_DMA_Init(&hdma_usart1_rx);

  __HAL_LINKDMA(&huart1,hdmarx,hdma_usart1_rx);

  hdma_usart1_tx.Instance = DMA2_Stream7;
  hdma_usart1_tx.Init.Channel = DMA_CHANNEL_4;
  hdma_usart1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
  hdma_usart1_tx.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_usart1_tx.Init.MemInc = DMA_MINC_ENABLE;
  hdma_usart1_tx.Init.PeriphDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_usart1_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
  hdma_usart1_tx.Init.Mode = DMA_NORMAL;
  hdma_usart1_tx.Init.Priority = DMA_PRIORITY_LOW;
  hdma_usart1_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
  HAL_DMA_Init(&hdma_usart1_tx);

  __HAL_LINKDMA(&huart1,hdmatx,hdma_usart1_tx);


  /* DMA interrupt init */
  HAL_NVIC_SetPriority(DMA2_Stream5_IRQn, 2, 2);
  HAL_NVIC_EnableIRQ(DMA2_Stream5_IRQn);
  HAL_NVIC_SetPriority(DMA2_Stream7_IRQn, 2, 1);
  HAL_NVIC_EnableIRQ(DMA2_Stream7_IRQn);
}

void  UART_MUX_SelectAddress(uint8_t muxAddress)
{
	uint8_t indexstr[4];

	if(muxAddress <= MAX_MUX_CHANNEL)
	{
		indexstr[0] = '~';
		indexstr[1] = muxAddress;
		indexstr[2] = 0x0D;
		indexstr[3] = 0x0A;
		if(!dmaTxActive)
		{
			memcpy(txBuffer, indexstr, 4);
			dmaTxActive = 0;
			if(HAL_OK == HAL_UART_Transmit_DMA(&huart1,txBuffer,4))
			{
				dmaTxActive = 1;
				while(dmaTxActive)
				{
					HAL_Delay(1);
				}
			}
		}
		else
		{
			memcpy(txBufferQue, indexstr, 4);
			txBufferQueLen = 4;
		}
	}
}


void UART_SendCmdString(uint8_t *cmdString)
{
	uint8_t cmdLength = strlen((char*)cmdString);

	if(dmaTxActive == 0)
	{
		if(cmdLength < TX_BUF_SIZE)		/* A longer string is an indication for a missing 0 termination */
		{
			if(dmaRxActive == 0)
			{
				UART_StartDMA_Receiption();
			}
			memcpy(txBuffer, cmdString, cmdLength);
			if(HAL_OK == HAL_UART_Transmit_DMA(&huart1,txBuffer,cmdLength))
			{
				dmaTxActive = 1;
				LastCmdRequestTick = HAL_GetTick();
			}
		}
	}
	else
	{
		memcpy(txBufferQue, cmdString, cmdLength);
		txBufferQueLen = cmdLength;
	}
}

void UART_SendCmdUbx(const uint8_t *cmd, uint8_t len)
{
	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);
		if(HAL_OK == HAL_UART_Transmit_DMA(&huart1,txBuffer,len))
		{
			dmaTxActive = 1;
			LastCmdRequestTick = HAL_GetTick();
		}
	}
}


void StringToInt(char *pstr, uint32_t *puInt32)
{
	uint8_t index = 0;
	uint32_t result = 0;
	while((pstr[index] >= '0') && (pstr[index] <= '9'))
	{
		result *=10;
		result += pstr[index] - '0';
		index++;
	}
	*puInt32 = result;
}

void StringToUInt64(char *pstr, uint64_t *puint64)
{
	uint8_t index = 0;
	uint64_t result = 0;
	while((pstr[index] >= '0') && (pstr[index] <= '9'))
	{
		result *=10;
		result += pstr[index] - '0';
		index++;
	}
	*puint64 = result;
}

void UART_StartDMA_Receiption()
{
	if(dmaRxActive == 0)
	{
    	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)
{
	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);

	UART_clearRxBuffer();
	rxReadIndex = 0;
	rxWriteIndex = 0;
	dmaRxActive = 0;
	txBufferQueLen = 0;
}

void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
    if(huart == &huart1)
    {
    	dmaRxActive = 0;
    	rxWriteIndex+=CHUNK_SIZE;
    	if(rxWriteIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
    	{
    		rxWriteIndex = 0;
    	}
		UART_StartDMA_Receiption();
    }
#ifdef ENABLE_GPIO_V2
    if(huart == &huart6)
    {
    	UART6_RxCpltCallback(huart);
    }
#endif
}
void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
{
	if(huart == &huart1)
	{
		dmaTxActive = 0;
		UART_WriteData();
		if(txBufferQueLen)
		{
			memcpy(txBuffer, txBufferQue, txBufferQueLen);
			HAL_UART_Transmit_DMA(&huart1,txBuffer,txBufferQueLen);
			dmaTxActive = 1;
			txBufferQueLen = 0;
		}
	}
#ifdef ENABLE_GPIO_V2
	if(huart == &huart6)
	{
		UART6_TxCpltCallback(huart);
	}
#endif
}

uint8_t isEndIndication(uint8_t index)
{
	uint8_t ret = 0;
	if(index % 2)
	{
		if(rxBuffer[index] == BUFFER_NODATA_HIGH)
		{
			ret = 1;
		}
	}
	else
	{
		if(rxBuffer[index] == BUFFER_NODATA_LOW)
		{
			ret = 1;
		}
	}

	return ret;
}
void UART_ReadData(uint8_t sensorType)
{
	uint8_t localRX = rxReadIndex;
	uint8_t futureIndex = rxReadIndex + 1;
	uint8_t moreData = 0;

	if(futureIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
	{
		futureIndex = 0;
	}

	if((!isEndIndication(localRX)) || (!isEndIndication(futureIndex)))	do
	{
		while((!isEndIndication(localRX)) || (moreData))
		{
			moreData = 0;
			switch (sensorType)
			{
				case SENSOR_MUX:
				case SENSOR_DIGO2:	uartO2_ProcessData(rxBuffer[localRX]);
					break;
	#ifdef ENABLE_CO2_SUPPORT
				case SENSOR_CO2:	uartCo2_ProcessData(rxBuffer[localRX]);
					break;
	#endif
	#ifdef ENABLE_GNSS_SUPPORT
					case SENSOR_GNSS:	uartGnss_ProcessData(rxBuffer[localRX]);
							break;
	#endif
	#ifdef ENABLE_SENTINEL_MODE
				case SENSOR_SENTINEL:	uartSentinel_ProcessData(rxBuffer[localRX]);
					break;
	#endif
				default:
					break;
			}
			if(localRX % 2)
			{
				rxBuffer[localRX] = BUFFER_NODATA_HIGH;
			}
			else
			{
				rxBuffer[localRX] = BUFFER_NODATA_LOW;
			}

			localRX++;
			rxReadIndex++;
			if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
			{
				localRX = 0;
				rxReadIndex = 0;
			}
			futureIndex++;
			if(futureIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
			{
				futureIndex = 0;
			}
		}
		if(!isEndIndication(futureIndex))
		{
			moreData = 1;
		}
	} while(moreData);
}

void UART_WriteData(void)
{
	if(huart1.hdmatx->State == HAL_DMA_STATE_READY)
	{
		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)
{
	uint8_t futureIndex = rxReadIndex + 1;

	if(futureIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
	{
		futureIndex = 0;
	}
	while((rxBuffer[rxReadIndex] != BUFFER_NODATA_LOW) && (rxBuffer[futureIndex] != BUFFER_NODATA_HIGH))
	{
		if(rxReadIndex % 2)
		{
			rxBuffer[rxReadIndex++] = BUFFER_NODATA_HIGH;
		}
		else
		{
			rxBuffer[rxReadIndex++] = BUFFER_NODATA_LOW;
		}
		if(rxReadIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
		{
			rxReadIndex = 0;
		}
		futureIndex++;
		if(futureIndex >= CHUNK_SIZE * CHUNKS_PER_BUFFER)
		{
			futureIndex = 0;
		}
	}
}

uint8_t UART_isComActive(uint8_t sensorId)
{
	uint8_t active = 1;

	if(time_elapsed_ms(LastCmdRequestTick, HAL_GetTick()) > 300) /* UART activity should be inactive 300ms after last command */
	{
		active = 0;
	}
	return active;
}


/************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/