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annotate Small_CPU/Src/uartProtocol_Sentinel.c @ 1065:1f2067cad41b Icon_Integration

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Mixed sensor operation improvment: A peak detector has been added to the adc measurement to avoid interferance while UART sensor are taking measurement while adc is active. The previous approach to shift adc into time windows where no UART were active had to be replaced because for the CO2 sensor is continously taking samples without providing a sync signal. In addition the UART MUX switching behavior has been improved (potential rx data received from previous sensor is discarded during channel switch etc.)
author Ideenmodellierer
date Mon, 16 Feb 2026 21:27:26 +0100
parents 785772303f9c
children
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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 15-Jan-2024
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7 * @brief Interface functionality to read data from Sentinel rebreather
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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) 2024 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_Sentinel.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_SENTINEL_MODE
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29 static uint8_t SentinelConnected = 0; /* Binary indicator if a sensor (and what type of subsensor) is connected or not */
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30 static receiveStateSentinel_t rxState = SENTRX_Ready;
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31
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32 extern sUartComCtrl Uart1Ctrl;
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33
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34 void ConvertByteToHexString(uint8_t byte, char* str)
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35 {
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36 uint8_t worker = 0;
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37 uint8_t digit = 0;
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38 uint8_t digitCnt = 1;
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39
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40 worker = byte;
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41 while((worker!=0) && (digitCnt != 255))
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42 {
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43 digit = worker % 16;
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44 if( digit < 10)
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45 {
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46 digit += '0';
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47 }
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48 else
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49 {
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50 digit += 'A' - 10;
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51 }
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52 str[digitCnt--]= digit;
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53 worker = worker / 16;
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54 }
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55 }
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56
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57 void uartSentinel_Control(void)
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58 {
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59 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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60 uartSentinelStatus_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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61
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62 if(localComState == UART_SENTINEL_INIT)
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63 {
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64 SentinelConnected = 0;
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65 UART_StartDMA_Receiption(&Uart1Ctrl);
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66 localComState = UART_SENTINEL_IDLE;
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67 }
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68 if(localComState == UART_SENTINEL_IDLE)
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69 {
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70 localComState = UART_SENTINEL_OPERATING; /* state is only used for timeout detection */
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71 }
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72 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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73 }
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74
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75 void uartSentinel_ProcessData(uint8_t data)
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76 {
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77 static uint8_t dataType = 0;
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78 static uint32_t dataValue[3];
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79 static uint8_t dataValueIdx = 0;
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80
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81 static uint8_t checksum = 0;
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82 static char checksum_str[]="00";
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83
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84 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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85 uartSentinelStatus_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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86
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87 switch(rxState)
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88 {
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89 case SENTRX_Ready: if((data >= 'a') && (data <= 'z')) /* Alive byte */
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90 {
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91 rxState = SENTRX_DetectStart;
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92 checksum = 0;
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93 }
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94 break;
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95
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96 case SENTRX_DetectStart: checksum += data; /* data available */
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97 if(data == '1')
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98 {
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99 rxState = SENTRX_SelectData;
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100 dataType = 0xFF;
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101
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102 }
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103 else
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104 {
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105 rxState = SENTRX_Ready;
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106 }
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107 break;
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108
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109 case SENTRX_SelectData: checksum += data; /* data type */
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110 switch(data)
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111 {
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112 case UART_SENTINEL_PRESSURE_O2: /* no '0' spacing for pressure sensors */
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113 case UART_SENTINEL_PRESSURE_D: dataType = data;
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114 rxState = SENTRX_Data0;
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115 dataValueIdx = 0;
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116 dataValue[0] = 0;
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117 break;
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118 case UART_SENTINEL_O2_P:
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119 case UART_SENTINEL_O2_S:
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120 case UART_SENTINEL_TEMPSTICK: dataType = data;
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121 break;
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122
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123 case '0': if(dataType != 0xff)
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124 {
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125 rxState = SENTRX_Data0;
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126 dataValueIdx = 0;
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127 dataValue[0] = 0;
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128
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129 }
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130 else
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131 {
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132 rxState = SENTRX_Ready;
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133 }
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134 break;
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135 default: rxState = SENTRX_Ready;
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136 }
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137 break;
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138
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139 case SENTRX_Data0:
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140 case SENTRX_Data1:
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141 case SENTRX_Data2:
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142 case SENTRX_Data4:
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143 case SENTRX_Data5:
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144 case SENTRX_Data6:
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145 case SENTRX_Data8:
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146 case SENTRX_Data9:
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147 case SENTRX_Data10: checksum += data;
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148 if((data >= '0') && (data <= '9'))
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149 {
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150 dataValue[dataValueIdx] = dataValue[dataValueIdx] * 10 + (data - '0');
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151 if((rxState == SENTRX_Data2) && ((dataType == UART_SENTINEL_PRESSURE_O2) || (dataType == UART_SENTINEL_PRESSURE_D)))
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152 {
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153 rxState = SENTRX_CheckSum;
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154 }
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155 else
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156 {
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157 rxState++;
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158 }
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159 }
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160 else
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161 {
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162 rxState = SENTRX_Ready;
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163 }
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164 break;
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165
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166 case SENTRX_Data3:
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167 case SENTRX_Data7: checksum += data;
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168 if(data == '0')
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169 {
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170 dataValueIdx++;
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171 dataValue[dataValueIdx] = 0;
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172 rxState++;
842
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173 }
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174 else
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175 {
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176 rxState = SENTRX_Ready;
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177 }
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178 break;
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179 case SENTRX_CheckSum: ConvertByteToHexString(checksum,checksum_str);
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180 if(data == checksum_str[0])
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181 {
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182 rxState = SENTRX_DataComplete;
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183 }
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184 else
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185 {
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186 rxState = SENTRX_Ready;
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187 }
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188
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189 break;
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190
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191 case SENTRX_DataComplete: if(data == checksum_str[1])
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192 {
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193 switch(dataType)
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194 {
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195 case UART_SENTINEL_O2_P: setExternalInterfaceChannel(0,(float)(dataValue[0] / 10.0));
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196 setExternalInterfaceChannel(1,(float)(dataValue[1] / 10.0));
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197 setExternalInterfaceChannel(2,(float)(dataValue[2] / 10.0));
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198 SentinelConnected |= SENTINEL_O2;
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199 break;
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200 case UART_SENTINEL_PRESSURE_O2: externalInterface_SetBottlePressure(0,dataValue[0]);
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201 SentinelConnected |= SENTINEL_PRESSURE;
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202 break;
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203 case UART_SENTINEL_PRESSURE_D: externalInterface_SetBottlePressure(1,dataValue[0]);
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204 SentinelConnected |= SENTINEL_PRESSURE;
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205 break;
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206 case UART_SENTINEL_TEMPSTICK: SentinelConnected |= SENTINEL_TEMPSTICK;
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207 }
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208 localComState = UART_SENTINEL_IDLE;
842
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209 }
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210 rxState = SENTRX_Ready;
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211 break;
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212
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213
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214 default: rxState = SENTRX_Ready;
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215 break;
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216
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217 }
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218 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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219 }
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220
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221 uint8_t uartSentinel_isSensorConnected()
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222 {
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223 return SentinelConnected;
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224 }
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225
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226 #endif
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227