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annotate Small_CPU/Src/uartProtocol_Co2.c @ 1066:eceb5cb2a8e3 Icon_Integration

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Added missing compile switch
author Ideenmodellierer
date Mon, 16 Feb 2026 21:33:04 +0100
parents 1f2067cad41b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /**
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2 ******************************************************************************
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3 * @file uartProtocol_Co2.c
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4 * @author heinrichs weikamp gmbh
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5 * @version V0.0.1
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6 * @date 31-Jul-2023
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7 * @brief Interface functionality to external, UART based CO2 sensors
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8 *
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9 @verbatim
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10
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11
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12 @endverbatim
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13 ******************************************************************************
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14 * @attention
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15 *
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16 * <h2><center>&copy; COPYRIGHT(c) 2023 heinrichs weikamp</center></h2>
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17 *
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18 ******************************************************************************
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19 */
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20 /* Includes ------------------------------------------------------------------*/
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21
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22 #include <string.h>
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23 #include <uartProtocol_Co2.h>
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24 #include "uart.h"
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25 #include "externalInterface.h"
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26
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27 #ifdef ENABLE_CO2_SUPPORT
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28 static uint8_t CO2Connected = 0; /* Binary indicator if a sensor is connected or not */
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29 static receiveStateCO2_t rxState = CO2RX_Ready;
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30
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31
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32
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33 float LED_Level = 0.0; /* Normalized LED value which may be used as indication for the health status of the sensor */
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34 float LED_ZeroOffset = 0.0;
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35 float pCO2 = 0.0;
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36
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37
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38
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39 void uartCo2_SendCmd(uint8_t CO2Cmd, uint8_t *cmdString, uint8_t *cmdLength)
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40 {
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41 *cmdLength = 0;
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42
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43 switch (CO2Cmd)
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44 {
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45 case CO2CMD_MODE_POLL: *cmdLength = snprintf((char*)cmdString, 10, "K 2\r\n");
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46 break;
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47 case CO2CMD_MODE_STREAM: *cmdLength = snprintf((char*)cmdString, 10, "K 1\r\n");
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48 break;
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49 case CO2CMD_CALIBRATE: *cmdLength = snprintf((char*)cmdString, 10, "G\r\n");
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50 break;
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51 case CO2CMD_GETDATA: *cmdLength = snprintf((char*)cmdString, 10, "Q\r\n");
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52 break;
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53 case CO2CMD_GETSCALE: *cmdLength = snprintf((char*)cmdString, 10, ".\r\n");
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54 break;
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55 default: *cmdLength = 0;
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56 break;
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57 }
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58 if(cmdLength != 0)
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59 {
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60 UART_SendCmdString(cmdString);
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61 }
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62 }
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63
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64
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65 void uartCo2_Control(void)
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66 {
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67 static uint8_t cmdString[10];
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68 static uint8_t cmdLength = 0;
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69 static uint8_t lastComState = UART_CO2_INIT;
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70
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71 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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72 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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73
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74 if(localComState == UART_CO2_ERROR)
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75 {
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76 localComState = lastComState;
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77 }
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78
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79 switch(localComState)
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80 {
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81 case UART_CO2_INIT: CO2Connected = 0;
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82 externalInterface_SetCO2Scale(0.0);
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83 UART_ReadData(SENSOR_CO2, 1); /* flush buffer */
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84 UART_StartDMA_Receiption(&Uart1Ctrl);
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85 localComState = UART_CO2_SETUP;
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86 uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
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87 break;
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88 case UART_CO2_SETUP: if(externalInterface_GetCO2Scale() == 0.0)
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89 {
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90 uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
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91 }
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92 else
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93 {
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94 uartCo2_SendCmd(CO2CMD_MODE_POLL, cmdString, &cmdLength);
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95 localComState = UART_CO2_MODE;
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96 }
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97 break;
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98 case UART_CO2_MODE: uartCo2_SendCmd(CO2CMD_MODE_POLL, cmdString, &cmdLength);
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99 break;
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100 case UART_CO2_CALIBRATE: uartCo2_SendCmd(CO2CMD_CALIBRATE, cmdString, &cmdLength);
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101 localComState = UART_CO2_IDLE;
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102 break;
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103 case UART_CO2_IDLE: if(externalInterface_GetCO2Scale() == 0.0) /* artifact from streaming mode => not needed for polling */
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104 {
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105 uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
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106 localComState = UART_CO2_SETUP;
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107 }
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108 else
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109 {
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110 uartCo2_SendCmd(CO2CMD_GETDATA, cmdString, &cmdLength);
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111 localComState = UART_CO2_OPERATING;
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112 }
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113 break;
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114 default: if(cmdLength != 0)
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115 {
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116 UART_SendCmdString(cmdString); /* resend last command */
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117 cmdLength = 0;
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118 }
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119 break;
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120 }
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121 lastComState = localComState;
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122 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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123 }
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124
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125 void uartCo2_ProcessData(uint8_t data)
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126 {
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127 static uint8_t dataType = 0;
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128 static uint32_t dataValue = 0;
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129 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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130 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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131
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132 if(rxState == CO2RX_Ready) /* identify data content */
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133 {
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134 switch(data)
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135 {
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136 case 'G':
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137 case 'K':
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138 case 'l':
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139 case 'D':
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140 case 'Z':
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141 case '.': dataType = data;
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142 rxState = CO2RX_Data0;
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143 dataValue = 0;
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144 break;
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145 case '?': localComState = UART_CO2_ERROR;
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146 rxState = CO2RX_Ready;
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147 break;
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148 default: /* unknown or corrupted => ignore */
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149 break;
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150 }
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151 }
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152 else if((data >= '0') && (data <= '9'))
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153 {
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154 if((rxState >= CO2RX_Data0) && (rxState <= CO2RX_Data4))
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155 {
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156 dataValue = dataValue * 10 + (data - '0');
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157
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158 if((rxState == CO2RX_Data4))
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159 {
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160 rxState = CO2RX_DataComplete;
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161 }
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162 else
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163 {
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164 rxState++;
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165 }
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166 }
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167 else /* protocol error data has max 5 digits */
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168 {
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169 if(rxState != CO2RX_DataComplete) /* commands will not answer with number values */
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170 {
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171 rxState = CO2RX_Ready;
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172 }
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173 }
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174 }
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175 else if((data == ' ') || (data == '\n')) /* Abort data detection */
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176 {
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177 if(rxState == CO2RX_DataComplete)
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178 {
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179 CO2Connected = 1;
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180 switch(localComState)
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181 {
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182 case UART_CO2_SETUP: if(dataType == '.')
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183 {
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184 localComState = UART_CO2_MODE;
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185 }
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186 break;
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187 case UART_CO2_MODE: if((dataType == 'K') && (dataValue == 2))
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188 {
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189 localComState = UART_CO2_IDLE;
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190 }
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191 break;
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192 default: localComState = UART_CO2_IDLE;
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193 break;
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194 }
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195
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196 switch(dataType)
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197 {
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198 case 'D': externalInterface_SetCO2SignalStrength(dataValue);
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199 break;
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200 case 'l': LED_ZeroOffset = dataValue;
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201 break;
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202 case 'Z': externalInterface_SetCO2Value(dataValue);
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203 break;
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204 case '.': externalInterface_SetCO2Scale(dataValue);
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205 break;
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206 default: rxState = CO2RX_Ready;
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207 break;
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208 }
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209 rxState = CO2RX_Ready;
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210 }
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211 if(rxState != CO2RX_Data0) /* reset state machine because message in wrong format */
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212 {
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213 rxState = CO2RX_Ready;
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214 }
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215 }
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216 else
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217 {
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218 if((rxState >= CO2RX_Data0) && (rxState <= CO2RX_Data4))
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219 {
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220 rxState = CO2RX_Ready; /* numerical data expected => abort */
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221 }
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222 }
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223 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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224 }
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225
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226 uint8_t uartCo2_isSensorConnected()
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227 {
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228 return CO2Connected;
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229 }
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230
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231 #endif
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232