view Small_CPU/Src/uartProtocol_Co2.c @ 840:7e714662b93f Evo_2_23

Development bugfix CO2 LLC: In the previous version the CO2 LLC (lowerleftcorner) was displayed even if no CO2 sensor was present or active. In the new version it will only be displayed if an sensor is active.
author Ideenmodellierer
date Sun, 07 Jan 2024 21:21:58 +0100
parents 9602a7338f28
children c3dd461ca3f9
line wrap: on
line source

/**
  ******************************************************************************
  * @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)
{
	*cmdLength = 0;

	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)
	{
		CO2Connected = 0;
		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);
			localComState = UART_CO2_IDLE;
		}
		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 */
			UART_StartDMA_Receiption();
		}
	}
	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;
			}
		}
		else	/* protocol error data has max 5 digits */
		{
			if(rxState != RX_DataComplete)	/* commands will not answer with number values */
			{
				rxState = RX_Ready;
			}
		}
	}
	if((data == ' ') || (data == '\n'))	/* Abort data detection */
	{
		if(rxState == RX_DataComplete)
		{
			CO2Connected = 1;
			if(localComState == UART_CO2_SETUP)
			{
				if(dataType == '.')
				{
					localComState = UART_CO2_IDLE;
				}
			}
			else
			{
				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