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annotate Small_CPU/Src/uartProtocol_Co2.c @ 803:96ffad0a4e57

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Cleanup initialisation / deinitialization: The UART1 is now deactivated during sleep and will be reactivated with the default baudrate 19200. This avoid unpredicted behavior in case of sleep => awake transitions (always start from scratch)
author Ideenmodellierer
date Thu, 10 Aug 2023 21:30:24 +0200
parents e9eba334b942
children 9602a7338f28
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rev   line source
798
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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 switch (CO2Cmd)
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43 {
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44 case CO2CMD_MODE_POLL: *cmdLength = snprintf((char*)cmdString, 10, "K 2\r\n");
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45 break;
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46 case CO2CMD_MODE_STREAM: *cmdLength = snprintf((char*)cmdString, 10, "K 1\r\n");
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47 break;
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48 case CO2CMD_CALIBRATE: *cmdLength = snprintf((char*)cmdString, 10, "G\r\n");
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49 break;
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50 case CO2CMD_GETDATA: *cmdLength = snprintf((char*)cmdString, 10, "Q\r\n");
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51 break;
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52 case CO2CMD_GETSCALE: *cmdLength = snprintf((char*)cmdString, 10, ".\r\n");
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53 break;
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54 default: *cmdLength = 0;
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55 break;
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56 }
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57 if(cmdLength != 0)
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58 {
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59 UART_SendCmdString(cmdString);
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60 }
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61 }
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62
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63
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64 void uartCo2_Control(void)
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65 {
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66 static uint8_t cmdString[10];
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67 static uint8_t cmdLength = 0;
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68 static uint8_t lastComState = 0;
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69
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70 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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71 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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72
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73 uint8_t *pmap = externalInterface_GetSensorMapPointer(0);
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74
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75
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76 if(localComState == UART_CO2_ERROR)
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77 {
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78 localComState = lastComState;
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79 }
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80
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81 if(localComState == UART_CO2_INIT)
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82 {
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83 externalInterface_SetCO2Scale(0.0);
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84 UART_StartDMA_Receiption();
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85 localComState = UART_CO2_SETUP;
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86 }
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87 if(localComState == UART_CO2_SETUP)
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88 {
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89 if(externalInterface_GetCO2Scale() == 0.0)
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90 {
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91 uartCo2_SendCmd(CO2CMD_GETSCALE, cmdString, &cmdLength);
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92 }
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93 else
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94 {
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95 localComState = UART_CO2_IDLE;
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96 }
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97 }
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98 else
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99 {
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100 if(localComState == UART_CO2_CALIBRATE)
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101 {
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102 uartCo2_SendCmd(CO2CMD_CALIBRATE, cmdString, &cmdLength);
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103 }
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104 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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105 {
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106 //if(cmdLength == 0) /* poll data */
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107 if(localComState == UART_CO2_IDLE)
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108 {
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109 uartCo2_SendCmd(CO2CMD_GETDATA, cmdString, &cmdLength);
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110 localComState = UART_CO2_OPERATING;
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111 }
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112 else /* resend last command */
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113 {
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114 UART_SendCmdString(cmdString);
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115 cmdLength = 0;
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116 }
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117 }
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118 else
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119 {
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120 localComState = UART_CO2_OPERATING; /* sensor in streaming mode if not connected to mux => operating */
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121 }
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122 }
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123 lastComState = localComState;
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124 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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125 }
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126
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127
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128 void uartCo2_ProcessData(uint8_t data)
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129 {
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130 static uint8_t dataType = 0;
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131 static uint32_t dataValue = 0;
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132 uint8_t activeSensor = externalInterface_GetActiveUartSensor();
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133 uartCO2Status_t localComState = externalInterface_GetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET);
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134
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135 if(rxState == RX_Ready) /* identify data content */
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136 {
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137 switch(data)
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138 {
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139 case 'G':
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140 case 'l':
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141 case 'D':
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142 case 'Z':
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143 case '.': dataType = data;
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144 rxState = RX_Data0;
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145 dataValue = 0;
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146 break;
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147 case '?': localComState = UART_CO2_ERROR;
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148 break;
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149 default: /* unknown or corrupted => ignore */
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150 break;
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151 }
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152 }
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153 else if((data >= '0') && (data <= '9'))
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154 {
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155 if((rxState >= RX_Data0) && (rxState <= RX_Data4))
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156 {
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157 dataValue = dataValue * 10 + (data - '0');
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158 rxState++;
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159 if(rxState == RX_Data5)
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160 {
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161 rxState = RX_DataComplete;
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162 CO2Connected = 1;
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163 }
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164 }
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165 else /* protocol error data has max 5 digits */
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166 {
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167 rxState = RX_Ready;
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168 }
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169 }
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170 if((data == ' ') || (data == '\n')) /* Abort data detection */
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171 {
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172 if(rxState == RX_DataComplete)
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173 {
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174 localComState = UART_CO2_IDLE;
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175 if(externalInterface_GetCO2State() == 0)
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176 {
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177 externalInterface_SetCO2State(EXT_INTERFACE_33V_ON);
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178 }
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179 switch(dataType)
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180 {
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181 case 'D': externalInterface_SetCO2SignalStrength(dataValue);
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182 break;
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183 case 'l': LED_ZeroOffset = dataValue;
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184 break;
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185 case 'Z': externalInterface_SetCO2Value(dataValue);
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186 break;
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187 case '.': externalInterface_SetCO2Scale(dataValue);
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188 break;
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189 default: rxState = RX_Ready;
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190 break;
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191 }
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192 }
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193 if(rxState != RX_Data0) /* reset state machine because message in wrong format */
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194 {
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195 rxState = RX_Ready;
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196 }
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197 }
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198 externalInterface_SetSensorState(activeSensor + EXT_INTERFACE_MUX_OFFSET,localComState);
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199 }
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200
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201 uint8_t uartCo2_isSensorConnected()
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202 {
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203 return CO2Connected;
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204 }
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205
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206 #endif
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207