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annotate Small_CPU/Src/externalInterface.c @ 725:621265ec3d23

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Update CO2 sensor implementation: Some updates were needed to get the CO2 sensor code up and running again (menu handling and UART DMA transfer).
author Ideenmodellierer
date Sat, 07 Jan 2023 18:11:52 +0100
parents 045ff7800501
children d646a0f724a7
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1 /**
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2 ******************************************************************************
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3 * @file externalInterface.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 07-Nov-2020
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7 * @brief Interface functionality to proceed external analog signal via i2c connection
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8 *
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9 @verbatim
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10 ==============================================================================
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11 ##### stm32f4xx_hal_i2c.c modification #####
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12 ==============================================================================
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13 The LTC2942 requires an repeated start condition without stop condition
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14 for data reception.
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15
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16 @endverbatim
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17 ******************************************************************************
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18 * @attention
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19 *
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20 * <h2><center>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>
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21 *
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22 ******************************************************************************
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23 */
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24 /* Includes ------------------------------------------------------------------*/
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25
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26 #include <math.h>
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27 #include <string.h>
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28 #include "i2c.h"
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29 #include "externalInterface.h"
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30 #include "scheduler.h"
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31 #include "uart.h"
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32 #include "data_exchange.h"
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33
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34 extern SGlobal global;
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35 extern UART_HandleTypeDef huart1;
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36
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37 #define ADC_ANSWER_LENGTH (5u) /* 3424 will provide addr + 4 data bytes */
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38 #define ADC_TIMEOUT (10u) /* conversion stuck for unknown reason => restart */
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39 #define ADC_REF_VOLTAGE_MV (2048.0f) /* reference voltage of MPC3424*/
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40
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41 #define ADC_START_CONVERSION (0x80)
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42 #define ADC_GAIN_4 (0x02)
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43 #define ADC_GAIN_4_VALUE (4.0f)
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44 #define ADC_GAIN_8 (0x03)
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45 #define ADC_GAIN_8_VALUE (8.0f)
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46 #define ADC_RESOLUTION_16BIT (0x08)
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47 #define ADC_RESOLUTION_16BIT_VALUE (16u)
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48 #define ADC_RESOLUTION_18BIT (0x0C)
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49 #define ADC_RESOLUTION_18BIT_VALUE (18u)
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50
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51 #define ANSWER_CONFBYTE_INDEX (4u)
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52
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53 static uint8_t activeChannel = 0; /* channel which is in request */
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54 static uint8_t recBuf[ADC_ANSWER_LENGTH];
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55 static uint8_t timeoutCnt = 0;
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56 static uint8_t externalInterfacePresent = 0;
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57
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58 float externalChannel_mV[MAX_ADC_CHANNEL];
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59 static uint8_t externalV33_On = 0;
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60 static uint8_t externalADC_On = 0;
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61 static uint8_t externalUART_Protocol = 0;
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62 static uint16_t externalCO2Value;
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63 static uint16_t externalCO2SignalStrength;
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64 static uint16_t externalCO2Status = 0;
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65
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66 static uint8_t sensorDataId = 0;
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67 static SSensorDataDiveO2 sensorDataDiveO2;
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68
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69
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70 void externalInterface_Init(void)
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71 {
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72 activeChannel = 0;
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73 timeoutCnt = 0;
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74 externalInterfacePresent = 0;
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75 if(externalInterface_StartConversion(activeChannel) == HAL_OK)
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76 {
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77 externalInterfacePresent = 1;
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78 global.deviceDataSendToMaster.hw_Info.extADC = 1;
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79 }
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80 global.deviceDataSendToMaster.hw_Info.checkADC = 1;
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81
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82 /* init data values */
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83 externalV33_On = 0;
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84 externalCO2Value = 0;
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85 externalCO2SignalStrength = 0;
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86 externalCO2Status = 0;
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87 }
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88
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89
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90 uint8_t externalInterface_StartConversion(uint8_t channel)
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91 {
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92 uint8_t retval = 0;
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93 uint8_t confByte = 0;
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94
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95 if(channel < MAX_ADC_CHANNEL)
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96 {
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97 confByte = ADC_START_CONVERSION | ADC_RESOLUTION_16BIT | ADC_GAIN_8;
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98 confByte |= channel << 5;
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99 retval = I2C_Master_Transmit(DEVICE_EXTERNAL_ADC, &confByte, 1);
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100 }
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101 return retval;
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102 }
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103
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104 /* Check if conversion is done and trigger measurement of next channel */
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105 uint8_t externalInterface_ReadAndSwitch()
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106 {
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107 uint8_t retval = EXTERNAL_ADC_NO_DATA;
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108
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109 if(externalInterfacePresent)
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110 {
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111 if(I2C_Master_Receive(DEVICE_EXTERNAL_ADC, recBuf, ADC_ANSWER_LENGTH) == HAL_OK)
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112 {
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113 if((recBuf[ANSWER_CONFBYTE_INDEX] & ADC_START_CONVERSION) == 0) /* !ready set => received data contains new value */
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114 {
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115 retval = activeChannel; /* return channel number providing new data */
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116 activeChannel++;
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117 if(activeChannel == MAX_ADC_CHANNEL)
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118 {
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119 if(externalUART_Protocol == (EXT_INTERFACE_UART_O2 >> 8)) /* mixed mode digital and analog o2 sensors => channel 0 is reserved for digital sensor */
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120 {
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121 activeChannel = 1;
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122 }
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123 else
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124 {
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125 activeChannel = 0;
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126 }
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127 }
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128 externalInterface_StartConversion(activeChannel);
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129 timeoutCnt = 0;
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130 }
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131 else
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132 {
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133 if(timeoutCnt++ >= ADC_TIMEOUT)
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134 {
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135 externalInterface_StartConversion(activeChannel);
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136 timeoutCnt = 0;
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137 }
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138 }
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139 }
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140 else /* take also i2c bus disturb into account */
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141 {
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142 if(timeoutCnt++ >= ADC_TIMEOUT)
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143 {
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144 externalInterface_StartConversion(activeChannel);
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145 timeoutCnt = 0;
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146 }
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147 }
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148 }
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149 return retval;
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150 }
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151 float externalInterface_CalculateADCValue(uint8_t channel)
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152 {
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153 int32_t rawvalue = 0;
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154 float retValue = 0.0;
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155 if(channel < MAX_ADC_CHANNEL)
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156 {
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157
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158 rawvalue = ((recBuf[0] << 16) | (recBuf[1] << 8) | (recBuf[2]));
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159
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160 switch(recBuf[3] & 0x0C) /* confbyte => Resolution bits*/
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161 {
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162 case ADC_RESOLUTION_16BIT: rawvalue = rawvalue >> 8; /* only 2 databytes received shift out confbyte*/
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163 if(rawvalue & (0x1 << (ADC_RESOLUTION_16BIT_VALUE-1))) /* MSB set => negative number */
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164 {
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165 rawvalue |= 0xFFFF0000; /* set MSB for int32 */
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166 }
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167 else
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168 {
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169 rawvalue &= 0x0000FFFF;
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170 }
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171 externalChannel_mV[channel] = ADC_REF_VOLTAGE_MV * 2.0 / (float) pow(2,ADC_RESOLUTION_16BIT_VALUE); /* calculate bit resolution */
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172 break;
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173 case ADC_RESOLUTION_18BIT: if(rawvalue & (0x1 << (ADC_RESOLUTION_18BIT_VALUE-1))) /* MSB set => negative number */
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174 {
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175 rawvalue |= 0xFFFE0000; /* set MSB for int32 */
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176 }
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177 externalChannel_mV[channel] = ADC_REF_VOLTAGE_MV * 2.0 / (float) pow(2,ADC_RESOLUTION_18BIT_VALUE); /* calculate bit resolution */
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178 break;
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179 default: rawvalue = 0;
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180 break;
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181 }
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182 externalChannel_mV[channel] = externalChannel_mV[channel] * rawvalue / ADC_GAIN_8_VALUE;
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183 retValue = externalChannel_mV[channel];
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184 }
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185 return retValue;
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186 }
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187 float getExternalInterfaceChannel(uint8_t channel)
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188 {
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189 float retval = 0;
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190
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191 if(channel < MAX_ADC_CHANNEL)
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192 {
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193 retval = externalChannel_mV[channel];
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194 }
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195 return retval;
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196 }
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197
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198 uint8_t setExternalInterfaceChannel(uint8_t channel, float value)
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199 {
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200 uint8_t retval = 0;
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201
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202 if(channel < MAX_ADC_CHANNEL)
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203 {
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204 externalChannel_mV[channel] = value;
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205 retval = 1;
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206 }
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207 return retval;
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208 }
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209
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210 void externalInterface_InitPower33(void)
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211 {
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212 GPIO_InitTypeDef GPIO_InitStructure;
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213
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214 GPIO_InitStructure.Pin = GPIO_PIN_7;
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215 GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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216 GPIO_InitStructure.Pull = GPIO_PULLUP;
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217 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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218 HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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219 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET);
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220 }
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221
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222
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223 uint8_t externalInterface_isEnabledPower33()
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224 {
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225 return externalV33_On;
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226 }
691
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227
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228 uint8_t externalInterface_isEnabledADC()
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229 {
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230 return externalADC_On;
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231 }
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232
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233 uint8_t externalInterface_GetUARTProtocol()
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234 {
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235 return externalUART_Protocol;
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236 }
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237
662
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238 void externalInterface_SwitchPower33(uint8_t state)
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239 {
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240 if(state != externalV33_On)
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241 {
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242 if(state)
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243 {
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244 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_RESET);
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245 externalV33_On = 1;
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246 }
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247 else
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248 {
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249 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET);
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250 externalV33_On = 0;
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251 externalInterface_SetCO2Value(0);
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252 externalInterface_SetCO2SignalStrength(0);
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253 }
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254 }
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255 }
691
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256 void externalInterface_SwitchADC(uint8_t state)
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257 {
714
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258 uint8_t loop = 0;
691
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259 if((state) && (externalInterfacePresent))
52d68cf9994c Improvment external interface usage:
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260 {
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261 externalInterface_StartConversion(activeChannel);
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262 externalADC_On = 1;
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263 }
52d68cf9994c Improvment external interface usage:
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264 else
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265 {
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266 externalADC_On = 0;
714
045ff7800501 Added customizable data area for specific sensor data:
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267 for(loop = 0; loop < MAX_ADC_CHANNEL; loop++)
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268 {
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269 externalChannel_mV[loop] = 0;
045ff7800501 Added customizable data area for specific sensor data:
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270 }
691
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271 }
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272 }
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273
704
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274 void externalInterface_SwitchUART(uint8_t protocol)
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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275 {
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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276 if(protocol < 0x08)
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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277 {
714
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278 sensorDataId = 0;
704
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279 externalUART_Protocol = protocol;
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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280 MX_USART1_UART_DeInit();
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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281 if( protocol != 0)
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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282 {
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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283 MX_USART1_UART_Init();
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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284 }
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285 }
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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286 }
f1b40364b0af Added protocol functions for UART DiveO2 sensor:
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287
662
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288 void externalInterface_SetCO2Value(uint16_t CO2_ppm)
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289 {
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290 externalCO2Value = CO2_ppm;
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291 }
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292
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293 void externalInterface_SetCO2SignalStrength(uint16_t LED_qa)
1b995079c045 PSCR Mode
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294 {
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295 externalCO2SignalStrength = LED_qa;
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296 }
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297
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298 uint16_t externalInterface_GetCO2Value(void)
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299 {
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300 return externalCO2Value;
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301 }
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302
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303 uint16_t externalInterface_GetCO2SignalStrength(void)
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304 {
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305 return externalCO2SignalStrength;
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306 }
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307
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308
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309 void externalInterface_SetCO2State(uint16_t state)
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310 {
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311 externalCO2Status = state;
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312 }
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313
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314 uint16_t externalInterface_GetCO2State(void)
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315 {
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316 return externalCO2Status;
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317 }
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318
714
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Ideenmodellierer
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319
045ff7800501 Added customizable data area for specific sensor data:
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320 uint8_t externalInterface_GetSensorData(uint8_t* pDataStruct)
045ff7800501 Added customizable data area for specific sensor data:
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321 {
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
322
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
323 if((pDataStruct != NULL) && sensorDataId != 0)
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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324 {
045ff7800501 Added customizable data area for specific sensor data:
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325 memcpy(pDataStruct, &sensorDataDiveO2, sizeof(sensorDataDiveO2));
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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326 }
045ff7800501 Added customizable data area for specific sensor data:
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327 return sensorDataId;
045ff7800501 Added customizable data area for specific sensor data:
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328 }
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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329
045ff7800501 Added customizable data area for specific sensor data:
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330 void externalInterface_SetSensorData(uint8_t dataId, uint8_t* pDataStruct)
045ff7800501 Added customizable data area for specific sensor data:
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331 {
045ff7800501 Added customizable data area for specific sensor data:
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332 if(pDataStruct != NULL)
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
333 {
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
334 if(dataId != 0)
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
335 {
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
336 memcpy(&sensorDataDiveO2, pDataStruct, sizeof(sensorDataDiveO2));
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
337 }
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
338 else
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
339 {
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
340 memset(&sensorDataDiveO2,0,sizeof(sensorDataDiveO2));
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
341 }
045ff7800501 Added customizable data area for specific sensor data:
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diff changeset
342 sensorDataId = dataId;
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
343 }
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
344 }
045ff7800501 Added customizable data area for specific sensor data:
Ideenmodellierer
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diff changeset
345
662
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346 void externalInterface_ExecuteCmd(uint16_t Cmd)
1b995079c045 PSCR Mode
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diff changeset
347 {
1b995079c045 PSCR Mode
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diff changeset
348 char cmdString[10];
1b995079c045 PSCR Mode
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diff changeset
349 uint8_t cmdLength = 0;
1b995079c045 PSCR Mode
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diff changeset
350
1b995079c045 PSCR Mode
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351 switch(Cmd & 0x00FF) /* lower byte is reserved for commands */
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352 {
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353 case EXT_INTERFACE_CO2_CALIB: cmdLength = snprintf(cmdString, 10, "G\r\n");
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354 break;
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355 default:
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356 break;
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357 }
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358 if(cmdLength != 0)
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359 {
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360 HAL_UART_Transmit(&huart1,(uint8_t*)cmdString,cmdLength,10);
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361 }
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362 return;
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363 }
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364