Mercurial > public > ostc4
annotate Small_CPU/Src/externalInterface.c @ 725:621265ec3d23
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 |
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date | Sat, 07 Jan 2023 18:11:52 +0100 |
parents | 045ff7800501 |
children | d646a0f724a7 |
rev | line source |
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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>© 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" |
662 | 31 #include "uart.h" |
32 #include "data_exchange.h" | |
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33 |
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34 extern SGlobal global; |
662 | 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]; |
662 | 59 static uint8_t externalV33_On = 0; |
691 | 60 static uint8_t externalADC_On = 0; |
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61 static uint8_t externalUART_Protocol = 0; |
662 | 62 static uint16_t externalCO2Value; |
63 static uint16_t externalCO2SignalStrength; | |
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 } |
559 | 80 global.deviceDataSendToMaster.hw_Info.checkADC = 1; |
662 | 81 |
82 /* init data values */ | |
83 externalV33_On = 0; | |
84 externalCO2Value = 0; | |
85 externalCO2SignalStrength = 0; | |
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 } |
662 | 197 |
691 | 198 uint8_t setExternalInterfaceChannel(uint8_t channel, float value) |
199 { | |
200 uint8_t retval = 0; | |
201 | |
202 if(channel < MAX_ADC_CHANNEL) | |
203 { | |
204 externalChannel_mV[channel] = value; | |
205 retval = 1; | |
206 } | |
207 return retval; | |
208 } | |
209 | |
662 | 210 void externalInterface_InitPower33(void) |
211 { | |
212 GPIO_InitTypeDef GPIO_InitStructure; | |
213 | |
214 GPIO_InitStructure.Pin = GPIO_PIN_7; | |
215 GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP; | |
216 GPIO_InitStructure.Pull = GPIO_PULLUP; | |
217 GPIO_InitStructure.Speed = GPIO_SPEED_LOW; | |
218 HAL_GPIO_Init(GPIOC, &GPIO_InitStructure); | |
219 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET); | |
220 } | |
221 | |
222 | |
223 uint8_t externalInterface_isEnabledPower33() | |
224 { | |
225 return externalV33_On; | |
226 } | |
691 | 227 |
228 uint8_t externalInterface_isEnabledADC() | |
229 { | |
230 return externalADC_On; | |
231 } | |
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 | 238 void externalInterface_SwitchPower33(uint8_t state) |
239 { | |
240 if(state != externalV33_On) | |
241 { | |
242 if(state) | |
243 { | |
244 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_RESET); | |
245 externalV33_On = 1; | |
246 } | |
247 else | |
248 { | |
249 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET); | |
250 externalV33_On = 0; | |
251 externalInterface_SetCO2Value(0); | |
252 externalInterface_SetCO2SignalStrength(0); | |
253 } | |
254 } | |
255 } | |
691 | 256 void externalInterface_SwitchADC(uint8_t state) |
257 { | |
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258 uint8_t loop = 0; |
691 | 259 if((state) && (externalInterfacePresent)) |
260 { | |
261 externalInterface_StartConversion(activeChannel); | |
262 externalADC_On = 1; | |
263 } | |
264 else | |
265 { | |
266 externalADC_On = 0; | |
714
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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; |
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270 } |
691 | 271 } |
272 } | |
662 | 273 |
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274 void externalInterface_SwitchUART(uint8_t protocol) |
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275 { |
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276 if(protocol < 0x08) |
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277 { |
714
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278 sensorDataId = 0; |
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279 externalUART_Protocol = protocol; |
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280 MX_USART1_UART_DeInit(); |
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281 if( protocol != 0) |
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282 { |
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283 MX_USART1_UART_Init(); |
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284 } |
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285 } |
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286 } |
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287 |
662 | 288 void externalInterface_SetCO2Value(uint16_t CO2_ppm) |
289 { | |
290 externalCO2Value = CO2_ppm; | |
291 } | |
292 | |
293 void externalInterface_SetCO2SignalStrength(uint16_t LED_qa) | |
294 { | |
295 externalCO2SignalStrength = LED_qa; | |
296 } | |
297 | |
298 uint16_t externalInterface_GetCO2Value(void) | |
299 { | |
300 return externalCO2Value; | |
301 } | |
302 | |
303 uint16_t externalInterface_GetCO2SignalStrength(void) | |
304 { | |
305 return externalCO2SignalStrength; | |
306 } | |
307 | |
308 | |
309 void externalInterface_SetCO2State(uint16_t state) | |
310 { | |
311 externalCO2Status = state; | |
312 } | |
313 | |
314 uint16_t externalInterface_GetCO2State(void) | |
315 { | |
316 return externalCO2Status; | |
317 } | |
318 | |
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319 |
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320 uint8_t externalInterface_GetSensorData(uint8_t* pDataStruct) |
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321 { |
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322 |
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323 if((pDataStruct != NULL) && sensorDataId != 0) |
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324 { |
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325 memcpy(pDataStruct, &sensorDataDiveO2, sizeof(sensorDataDiveO2)); |
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326 } |
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327 return sensorDataId; |
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328 } |
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329 |
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330 void externalInterface_SetSensorData(uint8_t dataId, uint8_t* pDataStruct) |
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331 { |
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332 if(pDataStruct != NULL) |
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333 { |
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334 if(dataId != 0) |
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335 { |
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336 memcpy(&sensorDataDiveO2, pDataStruct, sizeof(sensorDataDiveO2)); |
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337 } |
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338 else |
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339 { |
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340 memset(&sensorDataDiveO2,0,sizeof(sensorDataDiveO2)); |
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341 } |
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342 sensorDataId = dataId; |
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343 } |
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344 } |
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345 |
662 | 346 void externalInterface_ExecuteCmd(uint16_t Cmd) |
347 { | |
348 char cmdString[10]; | |
349 uint8_t cmdLength = 0; | |
350 | |
351 switch(Cmd & 0x00FF) /* lower byte is reserved for commands */ | |
352 { | |
353 case EXT_INTERFACE_CO2_CALIB: cmdLength = snprintf(cmdString, 10, "G\r\n"); | |
354 break; | |
355 default: | |
356 break; | |
357 } | |
358 if(cmdLength != 0) | |
359 { | |
360 HAL_UART_Transmit(&huart1,(uint8_t*)cmdString,cmdLength,10); | |
361 } | |
362 return; | |
363 } | |
364 |