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annotate Small_CPU/Src/externalInterface.c @ 707:e81afd727993

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Menu cleanup rebreather specific settings: In the previous version the selection for Fix setpoint or sensor was in the deco menu and the Fallback option in the hardware menu. As they have a dependency and are only relevant for rebreather operation, they have been moved into the extra menu which is containing rebreather related data and which is only visible in rebreather mode.
author Ideenmodellierer
date Thu, 03 Nov 2022 20:44:21 +0100
parents f1b40364b0af
children 045ff7800501
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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 "i2c.h"
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28 #include "externalInterface.h"
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29 #include "scheduler.h"
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30 #include "uart.h"
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31 #include "data_exchange.h"
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32
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33 extern SGlobal global;
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34 extern UART_HandleTypeDef huart1;
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35
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36 #define ADC_ANSWER_LENGTH (5u) /* 3424 will provide addr + 4 data bytes */
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37 #define ADC_TIMEOUT (10u) /* conversion stuck for unknown reason => restart */
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38 #define ADC_REF_VOLTAGE_MV (2048.0f) /* reference voltage of MPC3424*/
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39
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40 #define ADC_START_CONVERSION (0x80)
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41 #define ADC_GAIN_4 (0x02)
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42 #define ADC_GAIN_4_VALUE (4.0f)
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43 #define ADC_GAIN_8 (0x03)
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44 #define ADC_GAIN_8_VALUE (8.0f)
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45 #define ADC_RESOLUTION_16BIT (0x08)
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46 #define ADC_RESOLUTION_16BIT_VALUE (16u)
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47 #define ADC_RESOLUTION_18BIT (0x0C)
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48 #define ADC_RESOLUTION_18BIT_VALUE (18u)
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49
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50 #define ANSWER_CONFBYTE_INDEX (4u)
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51
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52 static uint8_t activeChannel = 0; /* channel which is in request */
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53 static uint8_t recBuf[ADC_ANSWER_LENGTH];
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54 static uint8_t timeoutCnt = 0;
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55 static uint8_t externalInterfacePresent = 0;
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56
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57 float externalChannel_mV[MAX_ADC_CHANNEL];
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58 static uint8_t externalV33_On = 0;
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59 static uint8_t externalADC_On = 0;
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60 static uint8_t externalUART_Protocol = 0;
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61 static uint16_t externalCO2Value;
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62 static uint16_t externalCO2SignalStrength;
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63 static uint16_t externalCO2Status = 0;
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64
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65
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66 void externalInterface_Init(void)
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67 {
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68 activeChannel = 0;
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69 timeoutCnt = 0;
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70 externalInterfacePresent = 0;
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71 if(externalInterface_StartConversion(activeChannel) == HAL_OK)
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72 {
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73 externalInterfacePresent = 1;
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74 global.deviceDataSendToMaster.hw_Info.extADC = 1;
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75 }
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76 global.deviceDataSendToMaster.hw_Info.checkADC = 1;
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77
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78 /* init data values */
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79 externalV33_On = 0;
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80 externalCO2Value = 0;
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81 externalCO2SignalStrength = 0;
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82 externalCO2Status = 0;
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83 }
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84
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85
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86 uint8_t externalInterface_StartConversion(uint8_t channel)
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87 {
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88 uint8_t retval = 0;
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89 uint8_t confByte = 0;
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90
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91 if(channel < MAX_ADC_CHANNEL)
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92 {
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93 confByte = ADC_START_CONVERSION | ADC_RESOLUTION_16BIT | ADC_GAIN_8;
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94 confByte |= channel << 5;
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95 retval = I2C_Master_Transmit(DEVICE_EXTERNAL_ADC, &confByte, 1);
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96 }
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97 return retval;
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98 }
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99
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100 /* Check if conversion is done and trigger measurement of next channel */
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101 uint8_t externalInterface_ReadAndSwitch()
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102 {
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103 uint8_t retval = EXTERNAL_ADC_NO_DATA;
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104
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105 if(externalInterfacePresent)
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106 {
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107 if(I2C_Master_Receive(DEVICE_EXTERNAL_ADC, recBuf, ADC_ANSWER_LENGTH) == HAL_OK)
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108 {
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109 if((recBuf[ANSWER_CONFBYTE_INDEX] & ADC_START_CONVERSION) == 0) /* !ready set => received data contains new value */
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110 {
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111 retval = activeChannel; /* return channel number providing new data */
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112 activeChannel++;
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113 if(activeChannel == MAX_ADC_CHANNEL)
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114 {
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115 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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116 {
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117 activeChannel = 1;
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118 }
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119 else
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120 {
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121 activeChannel = 0;
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122 }
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123 }
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124 externalInterface_StartConversion(activeChannel);
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125 timeoutCnt = 0;
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126 }
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127 else
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128 {
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129 if(timeoutCnt++ >= ADC_TIMEOUT)
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130 {
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131 externalInterface_StartConversion(activeChannel);
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132 timeoutCnt = 0;
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133 }
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134 }
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135 }
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136 else /* take also i2c bus disturb into account */
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137 {
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138 if(timeoutCnt++ >= ADC_TIMEOUT)
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139 {
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140 externalInterface_StartConversion(activeChannel);
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141 timeoutCnt = 0;
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142 }
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143 }
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144 }
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145 return retval;
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146 }
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147 float externalInterface_CalculateADCValue(uint8_t channel)
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148 {
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149 int32_t rawvalue = 0;
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150 float retValue = 0.0;
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151 if(channel < MAX_ADC_CHANNEL)
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152 {
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153
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154 rawvalue = ((recBuf[0] << 16) | (recBuf[1] << 8) | (recBuf[2]));
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155
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156 switch(recBuf[3] & 0x0C) /* confbyte => Resolution bits*/
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157 {
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158 case ADC_RESOLUTION_16BIT: rawvalue = rawvalue >> 8; /* only 2 databytes received shift out confbyte*/
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159 if(rawvalue & (0x1 << (ADC_RESOLUTION_16BIT_VALUE-1))) /* MSB set => negative number */
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160 {
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161 rawvalue |= 0xFFFF0000; /* set MSB for int32 */
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162 }
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163 else
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164 {
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165 rawvalue &= 0x0000FFFF;
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166 }
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167 externalChannel_mV[channel] = ADC_REF_VOLTAGE_MV * 2.0 / (float) pow(2,ADC_RESOLUTION_16BIT_VALUE); /* calculate bit resolution */
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168 break;
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169 case ADC_RESOLUTION_18BIT: if(rawvalue & (0x1 << (ADC_RESOLUTION_18BIT_VALUE-1))) /* MSB set => negative number */
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170 {
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171 rawvalue |= 0xFFFE0000; /* set MSB for int32 */
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172 }
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173 externalChannel_mV[channel] = ADC_REF_VOLTAGE_MV * 2.0 / (float) pow(2,ADC_RESOLUTION_18BIT_VALUE); /* calculate bit resolution */
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174 break;
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175 default: rawvalue = 0;
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176 break;
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177 }
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178 externalChannel_mV[channel] = externalChannel_mV[channel] * rawvalue / ADC_GAIN_8_VALUE;
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179 retValue = externalChannel_mV[channel];
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180 }
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181 return retValue;
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182 }
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183 float getExternalInterfaceChannel(uint8_t channel)
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184 {
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185 float retval = 0;
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186
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187 if(channel < MAX_ADC_CHANNEL)
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188 {
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189 retval = externalChannel_mV[channel];
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190 }
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191 return retval;
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192 }
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193
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194 uint8_t setExternalInterfaceChannel(uint8_t channel, float value)
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195 {
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196 uint8_t retval = 0;
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197
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198 if(channel < MAX_ADC_CHANNEL)
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199 {
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200 externalChannel_mV[channel] = value;
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201 retval = 1;
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202 }
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203 return retval;
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204 }
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205
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206 void externalInterface_InitPower33(void)
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207 {
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208 GPIO_InitTypeDef GPIO_InitStructure;
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209
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210 GPIO_InitStructure.Pin = GPIO_PIN_7;
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211 GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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212 GPIO_InitStructure.Pull = GPIO_PULLUP;
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213 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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214 HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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215 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET);
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216 }
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217
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218
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219 uint8_t externalInterface_isEnabledPower33()
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220 {
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221 return externalV33_On;
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222 }
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223
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224 uint8_t externalInterface_isEnabledADC()
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225 {
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226 return externalADC_On;
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227 }
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228
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229 uint8_t externalInterface_GetUARTProtocol()
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230 {
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231 return externalUART_Protocol;
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232 }
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233
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234 void externalInterface_SwitchPower33(uint8_t state)
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235 {
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236 if(state != externalV33_On)
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237 {
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238 if(state)
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239 {
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240 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_RESET);
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241 externalV33_On = 1;
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242 }
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243 else
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244 {
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245 HAL_GPIO_WritePin(GPIOC,GPIO_PIN_7,GPIO_PIN_SET);
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246 externalV33_On = 0;
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247 externalInterface_SetCO2Value(0);
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248 externalInterface_SetCO2SignalStrength(0);
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249 }
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250 }
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251 }
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252 void externalInterface_SwitchADC(uint8_t state)
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253 {
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254 if((state) && (externalInterfacePresent))
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255 {
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256 externalInterface_StartConversion(activeChannel);
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257 externalADC_On = 1;
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258 }
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259 else
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260 {
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261 externalADC_On = 0;
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262 }
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263 }
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264
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265 void externalInterface_SwitchUART(uint8_t protocol)
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266 {
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267 if(protocol < 0x08)
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268 {
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269 externalUART_Protocol = protocol;
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270 MX_USART1_UART_DeInit();
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271 if( protocol != 0)
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272 {
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273 MX_USART1_UART_Init();
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274 }
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275 }
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276 }
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277
662
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278 void externalInterface_SetCO2Value(uint16_t CO2_ppm)
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279 {
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280 externalCO2Value = CO2_ppm;
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281 }
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282
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283 void externalInterface_SetCO2SignalStrength(uint16_t LED_qa)
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284 {
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285 externalCO2SignalStrength = LED_qa;
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286 }
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287
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288 uint16_t externalInterface_GetCO2Value(void)
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289 {
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290 return externalCO2Value;
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291 }
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292
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293 uint16_t externalInterface_GetCO2SignalStrength(void)
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294 {
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295 return externalCO2SignalStrength;
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296 }
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297
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298
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299 void externalInterface_SetCO2State(uint16_t state)
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300 {
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301 externalCO2Status = state;
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302 }
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303
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304 uint16_t externalInterface_GetCO2State(void)
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305 {
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306 return externalCO2Status;
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307 }
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308
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309 void externalInterface_ExecuteCmd(uint16_t Cmd)
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310 {
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311 char cmdString[10];
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312 uint8_t cmdLength = 0;
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313
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314 switch(Cmd & 0x00FF) /* lower byte is reserved for commands */
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315 {
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316 case EXT_INTERFACE_CO2_CALIB: cmdLength = snprintf(cmdString, 10, "G\r\n");
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317 break;
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318 default:
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319 break;
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320 }
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321 if(cmdLength != 0)
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322 {
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323 HAL_UART_Transmit(&huart1,(uint8_t*)cmdString,cmdLength,10);
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324 }
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325 return;
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326 }
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327