view Small_CPU/Src/uartProtocol_Co2.c @ 804:391b3d420a39

Cleanup initialisation code: Some variables were not initialised during awake transition and the mapping of to the legacy adc slots were done at several location. This has been cleaned up not. Do not run UART during ADC sensor detection: A operation UART sensor caused the false detection of a not connected ADC sensor. To avoid this the UART is now deactivated during ADC detection phase.
author Ideenmodellierer
date Thu, 10 Aug 2023 21:35:34 +0200
parents e9eba334b942
children 9602a7338f28
line wrap: on
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/**
  ******************************************************************************
  * @file    uartProtocol_Co2.c
  * @author  heinrichs weikamp gmbh
  * @version V0.0.1
  * @date    31-Jul-2023
  * @brief   Interface functionality to external, UART based CO2 sensors
  *
  @verbatim


  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2023 heinrichs weikamp</center></h2>
  *
  ******************************************************************************
  */
/* Includes ------------------------------------------------------------------*/

#include <string.h>
#include <uartProtocol_Co2.h>
#include "uart.h"
#include "externalInterface.h"


#ifdef ENABLE_CO2_SUPPORT
static uint8_t CO2Connected = 0;						/* Binary indicator if a sensor is connected or not */
static receiveState_t rxState = RX_Ready;



float LED_Level = 0.0;							/* Normalized LED value which may be used as indication for the health status of the sensor */
float LED_ZeroOffset = 0.0;
float pCO2 = 0.0;



void uartCo2_SendCmd(uint8_t CO2Cmd, uint8_t *cmdString, uint8_t *cmdLength)
{
	switch (CO2Cmd)
	{
		case CO2CMD_MODE_POLL:		*cmdLength = snprintf((char*)cmdString, 10, "K 2\r\n");
				break;
		case CO2CMD_MODE_STREAM:	*cmdLength = snprintf((char*)cmdString, 10, "K 1\r\n");
				break;
		case CO2CMD_CALIBRATE:		*cmdLength = snprintf((char*)cmdString, 10, "G\r\n");
				break;
		case CO2CMD_GETDATA:		*cmdLength = snprintf((char*)cmdString, 10, "Q\r\n");
				break;
		case CO2CMD_GETSCALE:		*cmdLength = snprintf((char*)cmdString, 10, ".\r\n");
				break;
		default: *cmdLength = 0;
			break;
	}
	if(cmdLength != 0)
	{
		UART_SendCmdString(cmdString);
	}
}


void uartCo2_Control(void)
{
	static uint8_t cmdString[10];
	static uint8_t cmdLength = 0;
	static uint8_t lastComState = 0;

	uint8_t activeSensor = externalInterface_GetActiveUartSensor();
	uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);

	uint8_t *pmap = externalInterface_GetSensorMapPointer(0);


	if(localComState == UART_CO2_ERROR)
	{
		localComState = lastComState;
	}

	if(localComState == UART_CO2_INIT)
	{
		externalInterface_SetCO2Scale(0.0);
		UART_StartDMA_Receiption();
		localComState = UART_CO2_SETUP;
	}
	if(localComState == UART_CO2_SETUP)
	{
		if(externalInterface_GetCO2Scale() == 0.0)
		{
			uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
		}
		else
		{
			localComState = UART_CO2_IDLE;
		}
	}
	else
	{
		if(localComState == UART_CO2_CALIBRATE)
		{
			uartCo2_SendCmd(CO2CMD_CALIBRATE, cmdString, &cmdLength);
		}
		else if(pmap[EXT_INTERFACE_SENSOR_CNT-1] == SENSOR_MUX)		/* sensor is working in polling mode if mux is connected to avoid interference with other sensors */
		{
			//if(cmdLength == 0)							/* poll data */
			if(localComState == UART_CO2_IDLE)
			{
				uartCo2_SendCmd(CO2CMD_GETDATA, cmdString, &cmdLength);
				localComState = UART_CO2_OPERATING;
			}
			else											/* resend last command */
			{
				UART_SendCmdString(cmdString);
				cmdLength = 0;
			}
		}
		else
		{
			localComState = UART_CO2_OPERATING;					/* sensor in streaming mode if not connected to mux => operating */
		}
	}
	lastComState = localComState;
	externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
}


void uartCo2_ProcessData(uint8_t data)
{
	static uint8_t dataType = 0;
	static uint32_t dataValue = 0;
	uint8_t activeSensor = externalInterface_GetActiveUartSensor();
	uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);

	if(rxState == RX_Ready)		/* identify data content */
	{
		switch(data)
		{
			case 'G':
			case 'l':
			case 'D':
			case 'Z':
			case '.':			dataType = data;
								rxState = RX_Data0;
								dataValue = 0;
				break;
			case '?':			localComState = UART_CO2_ERROR;
				break;
			default:			/* unknown or corrupted => ignore */
					break;
		}
	}
	else if((data >= '0') && (data <= '9'))
	{
		if((rxState >= RX_Data0) && (rxState <= RX_Data4))
		{
			dataValue = dataValue * 10 + (data - '0');
			rxState++;
			if(rxState == RX_Data5)
			{
				rxState = RX_DataComplete;
				CO2Connected = 1;
			}
		}
		else	/* protocol error data has max 5 digits */
		{
			rxState = RX_Ready;
		}
	}
	if((data == ' ') || (data == '\n'))	/* Abort data detection */
	{
		if(rxState == RX_DataComplete)
		{
			localComState = UART_CO2_IDLE;
			if(externalInterface_GetCO2State() == 0)
			{
				externalInterface_SetCO2State(EXT_INTERFACE_33V_ON);
			}
			switch(dataType)
			{
				case 'D':			externalInterface_SetCO2SignalStrength(dataValue);
					break;
				case 'l':			LED_ZeroOffset = dataValue;
					break;
				case 'Z':			externalInterface_SetCO2Value(dataValue);
					break;
				case '.':			externalInterface_SetCO2Scale(dataValue);
					break;
				default:			rxState = RX_Ready;
					break;
			}
		}
		if(rxState != RX_Data0)	/* reset state machine because message in wrong format */
		{
			rxState = RX_Ready;
		}
	}
	externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
}

uint8_t uartCo2_isSensorConnected()
{
	return CO2Connected;
}

#endif