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annotate Small_CPU/Src/uartProtocol_Co2.c @ 921:eb4109d7d1e9 Evo_2_23

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Improved mix mode ADC conversion: Activity of UART sensors may have an impact to ADC measurement. To avoid the ADC trigger was moved into a time window ~300ms after last UART command request => After UART sensor performed measurement but before next measurement is requested. In addition the general ADC measurement cycle has been changed to one second to avoid jitter in the value updates on the display.
author Ideenmodellierer
date Sun, 03 Nov 2024 18:19:51 +0100
parents c0553dd70608
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 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 receiveStateCO2_t rxState = CO2RX_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_clearRxBuffer();
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88 UART_StartDMA_Receiption();
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89 localComState = UART_CO2_SETUP;
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90 }
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91 if(localComState == UART_CO2_SETUP)
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92 {
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93 if(externalInterface_GetCO2Scale() == 0.0)
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94 {
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95 uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
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96 }
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97 else
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98 {
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99 localComState = UART_CO2_IDLE;
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100 }
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101 }
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102 else
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103 {
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104 if(localComState == UART_CO2_CALIBRATE)
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105 {
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106 uartCo2_SendCmd(CO2CMD_CALIBRATE, cmdString, &cmdLength);
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107 localComState = UART_CO2_IDLE;
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108 }
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109 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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110 {
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111 //if(cmdLength == 0) /* poll data */
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112 if(localComState == UART_CO2_IDLE)
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113 {
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114 uartCo2_SendCmd(CO2CMD_GETDATA, cmdString, &cmdLength);
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115 localComState = UART_CO2_OPERATING;
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116 }
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117 else /* resend last command */
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118 {
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119 UART_SendCmdString(cmdString);
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120 cmdLength = 0;
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121 }
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122 }
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123 else
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124 {
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125 localComState = UART_CO2_OPERATING; /* sensor in streaming mode if not connected to mux => operating */
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126 UART_StartDMA_Receiption();
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127 }
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128 }
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129 lastComState = localComState;
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130 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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131 }
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132
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133
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134 void uartCo2_ProcessData(uint8_t data)
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135 {
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136 static uint8_t dataType = 0;
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137 static uint32_t dataValue = 0;
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138 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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139 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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140
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141 if(rxState == CO2RX_Ready) /* identify data content */
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142 {
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143 switch(data)
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144 {
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145 case 'G':
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146 case 'l':
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147 case 'D':
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148 case 'Z':
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149 case '.': dataType = data;
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150 rxState = CO2RX_Data0;
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151 dataValue = 0;
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152 break;
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153 case '?': localComState = UART_CO2_ERROR;
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154 break;
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155 default: /* unknown or corrupted => ignore */
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156 break;
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157 }
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158 }
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159 else if((data >= '0') && (data <= '9'))
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160 {
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161 if((rxState >= CO2RX_Data0) && (rxState <= CO2RX_Data4))
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162 {
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163 dataValue = dataValue * 10 + (data - '0');
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164 rxState++;
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165 if(rxState == CO2RX_Data5)
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166 {
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167 rxState = CO2RX_DataComplete;
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168 }
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169 }
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170 else /* protocol error data has max 5 digits */
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171 {
842
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172 if(rxState != CO2RX_DataComplete) /* commands will not answer with number values */
809
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173 {
842
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174 rxState = CO2RX_Ready;
809
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175 }
798
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176 }
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177 }
916
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178 else if((data == ' ') || (data == '\n')) /* Abort data detection */
798
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179 {
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180 if(rxState == CO2RX_DataComplete)
798
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181 {
809
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182 CO2Connected = 1;
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183 if(localComState == UART_CO2_SETUP)
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184 {
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185 if(dataType == '.')
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186 {
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187 localComState = UART_CO2_IDLE;
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188 }
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189 }
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190 else
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191 {
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192 localComState = UART_CO2_IDLE;
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193 }
798
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194 if(externalInterface_GetCO2State() == 0)
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195 {
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196 externalInterface_SetCO2State(EXT_INTERFACE_33V_ON);
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197 }
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198 switch(dataType)
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199 {
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200 case 'D': externalInterface_SetCO2SignalStrength(dataValue);
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201 break;
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202 case 'l': LED_ZeroOffset = dataValue;
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203 break;
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204 case 'Z': externalInterface_SetCO2Value(dataValue);
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205 break;
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206 case '.': externalInterface_SetCO2Scale(dataValue);
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207 break;
842
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208 default: rxState = CO2RX_Ready;
798
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209 break;
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210 }
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211 }
842
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212 if(rxState != CO2RX_Data0) /* reset state machine because message in wrong format */
798
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213 {
842
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214 rxState = CO2RX_Ready;
798
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215 }
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216 }
916
4832981f9af8 External sensor UART: Switch to DMA TX transfers:
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217 else
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218 {
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219 if((rxState >= CO2RX_Data0) && (rxState <= CO2RX_Data4))
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220 {
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221 rxState = CO2RX_Ready; /* numerical data expected => abort */
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222 }
4832981f9af8 External sensor UART: Switch to DMA TX transfers:
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223 }
798
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224 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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225 }
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226
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227 uint8_t uartCo2_isSensorConnected()
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228 {
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229 return CO2Connected;
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230 }
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231
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232 #endif
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233