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annotate Small_CPU/Src/uartProtocol_Co2.c @ 809:9602a7338f28

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DevBugfix CO2 sensor in streaming mode: In standalone mode (no multiplexer) the CO2 sensor is working in streaming mode => it could happen that the OSTC received data before the scaling factor was requested. As result the CO2 values were calculated with a zero value. This problem has been fixed. In addition some code cleanup has been done. Unifying usage of changeBaudrate function instead of old baud selection based on protocol request of Discovery firmware.
author Ideenmodellierer
date Sun, 27 Aug 2023 20:51:13 +0200
parents e9eba334b942
children c3dd461ca3f9
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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
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28 #ifdef ENABLE_CO2_SUPPORT
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29 static uint8_t CO2Connected = 0; /* Binary indicator if a sensor is connected or not */
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30 static receiveState_t rxState = RX_Ready;
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31
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32
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33
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34 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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35 float LED_ZeroOffset = 0.0;
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36 float pCO2 = 0.0;
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37
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38
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39
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40 void uartCo2_SendCmd(uint8_t CO2Cmd, uint8_t *cmdString, uint8_t *cmdLength)
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41 {
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42 *cmdLength = 0;
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43
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44 switch (CO2Cmd)
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45 {
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46 case CO2CMD_MODE_POLL: *cmdLength = snprintf((char*)cmdString, 10, "K 2\r\n");
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47 break;
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48 case CO2CMD_MODE_STREAM: *cmdLength = snprintf((char*)cmdString, 10, "K 1\r\n");
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49 break;
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50 case CO2CMD_CALIBRATE: *cmdLength = snprintf((char*)cmdString, 10, "G\r\n");
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51 break;
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52 case CO2CMD_GETDATA: *cmdLength = snprintf((char*)cmdString, 10, "Q\r\n");
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53 break;
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54 case CO2CMD_GETSCALE: *cmdLength = snprintf((char*)cmdString, 10, ".\r\n");
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55 break;
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56 default: *cmdLength = 0;
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57 break;
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58 }
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59 if(cmdLength != 0)
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60 {
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61 UART_SendCmdString(cmdString);
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62 }
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63 }
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64
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65
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66 void uartCo2_Control(void)
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67 {
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68 static uint8_t cmdString[10];
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69 static uint8_t cmdLength = 0;
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70 static uint8_t lastComState = 0;
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71
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72 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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73 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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74
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75 uint8_t *pmap = externalInterface_GetSensorMapPointer(0);
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76
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77
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78 if(localComState == UART_CO2_ERROR)
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79 {
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80 localComState = lastComState;
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81 }
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82
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83 if(localComState == UART_CO2_INIT)
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84 {
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85 CO2Connected = 0;
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86 externalInterface_SetCO2Scale(0.0);
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87 UART_StartDMA_Receiption();
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88 localComState = UART_CO2_SETUP;
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89 }
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90 if(localComState == UART_CO2_SETUP)
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91 {
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92 if(externalInterface_GetCO2Scale() == 0.0)
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93 {
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94 uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
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95 }
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96 else
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97 {
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98 localComState = UART_CO2_IDLE;
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99 }
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100 }
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101 else
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102 {
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103 if(localComState == UART_CO2_CALIBRATE)
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104 {
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105 uartCo2_SendCmd(CO2CMD_CALIBRATE, cmdString, &cmdLength);
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106 localComState = UART_CO2_IDLE;
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107 }
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108 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 */
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109 {
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110 //if(cmdLength == 0) /* poll data */
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111 if(localComState == UART_CO2_IDLE)
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112 {
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113 uartCo2_SendCmd(CO2CMD_GETDATA, cmdString, &cmdLength);
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114 localComState = UART_CO2_OPERATING;
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115 }
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116 else /* resend last command */
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117 {
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118 UART_SendCmdString(cmdString);
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119 cmdLength = 0;
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120 }
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121 }
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122 else
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123 {
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124 localComState = UART_CO2_OPERATING; /* sensor in streaming mode if not connected to mux => operating */
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125 UART_StartDMA_Receiption();
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126 }
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127 }
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128 lastComState = localComState;
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129 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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130 }
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131
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132
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133 void uartCo2_ProcessData(uint8_t data)
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134 {
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135 static uint8_t dataType = 0;
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136 static uint32_t dataValue = 0;
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137 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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138 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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139
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140 if(rxState == RX_Ready) /* identify data content */
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141 {
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142 switch(data)
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143 {
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144 case 'G':
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145 case 'l':
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146 case 'D':
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147 case 'Z':
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148 case '.': dataType = data;
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149 rxState = RX_Data0;
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150 dataValue = 0;
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151 break;
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152 case '?': localComState = UART_CO2_ERROR;
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153 break;
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154 default: /* unknown or corrupted => ignore */
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155 break;
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156 }
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157 }
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158 else if((data >= '0') && (data <= '9'))
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159 {
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160 if((rxState >= RX_Data0) && (rxState <= RX_Data4))
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161 {
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162 dataValue = dataValue * 10 + (data - '0');
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163 rxState++;
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164 if(rxState == RX_Data5)
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165 {
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166 rxState = RX_DataComplete;
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167 }
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168 }
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169 else /* protocol error data has max 5 digits */
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170 {
809
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171 if(rxState != RX_DataComplete) /* commands will not answer with number values */
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172 {
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173 rxState = RX_Ready;
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174 }
798
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175 }
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176 }
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177 if((data == ' ') || (data == '\n')) /* Abort data detection */
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178 {
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179 if(rxState == RX_DataComplete)
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180 {
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181 CO2Connected = 1;
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182 if(localComState == UART_CO2_SETUP)
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183 {
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184 if(dataType == '.')
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185 {
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186 localComState = UART_CO2_IDLE;
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187 }
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188 }
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189 else
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190 {
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191 localComState = UART_CO2_IDLE;
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192 }
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193 if(externalInterface_GetCO2State() == 0)
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194 {
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195 externalInterface_SetCO2State(EXT_INTERFACE_33V_ON);
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196 }
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197 switch(dataType)
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198 {
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199 case 'D': externalInterface_SetCO2SignalStrength(dataValue);
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200 break;
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201 case 'l': LED_ZeroOffset = dataValue;
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202 break;
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203 case 'Z': externalInterface_SetCO2Value(dataValue);
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204 break;
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205 case '.': externalInterface_SetCO2Scale(dataValue);
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206 break;
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207 default: rxState = RX_Ready;
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208 break;
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209 }
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210 }
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211 if(rxState != RX_Data0) /* reset state machine because message in wrong format */
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212 {
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213 rxState = RX_Ready;
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214 }
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215 }
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216 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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217 }
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218
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219 uint8_t uartCo2_isSensorConnected()
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220 {
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221 return CO2Connected;
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222 }
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223
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224 #endif
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225