38
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1 /**
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2 ******************************************************************************
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3 * @file batteryCharger.c
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4 * @author heinrichs weikamp gmbh
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5 * @date 09-Dec-2014
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6 * @version V0.0.1
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7 * @since 09-Dec-2014
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8 * @brief LTC4054 Battery Charger
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9 *
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10 @verbatim
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11 ==============================================================================
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12 ##### How to use #####
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13 ==============================================================================
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14
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15 The bq5105x provides one status output, CHG. This output is an open-drain NMOS device that is rated to 20 V.
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16 The open-drain FET connected to the CHG pin will be turned on whenever the output (BAT) of the charger is
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17 enabled. As a note, the output of the charger supply will not be enabled if the VRECT-REG does not converge to the
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18 no-load target voltage.
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19
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644
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20 CHG F4 7 O Open-drain output � active when BAT is enabled. Float if not used.
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21
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22 @endverbatim
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23 ******************************************************************************
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24 * @attention
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25 *
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26 * <h2><center>© COPYRIGHT(c) 2015 heinrichs weikamp</center></h2>
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27 *
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28 ******************************************************************************
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29 */
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30 /* Includes ------------------------------------------------------------------*/
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31 #include "batteryCharger.h"
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32 #include "batteryGasGauge.h"
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33 #include "stm32f4xx_hal.h"
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34 #include "scheduler.h"
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35
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36
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643
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37 /* Use This compile switch to select the new charger status control implementation */
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644
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38 #define ENABLE_CHARGER_STATUS_V2
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643
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39
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662
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40 #define CHARGER_DEBOUNCE_SECONDS (6u) /* 6 seconds used to avoid problems with charger interrupts / disconnections */
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38
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41
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668
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42 static uint8_t battery_i_charge_status = 0;
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43 static uint16_t battery_charger_counter = 0;
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643
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44
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45 #ifdef ENABLE_CHARGER_STATUS_V2
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46 static chargerState_t batteryChargerState = Charger_NotConnected;
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47 #endif
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38
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48
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49 /* can be 0, 1 or 255
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50 * 0 is disconnected
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51 * 1 is charging
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52 * 255 is full
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53 */
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54 uint8_t get_charge_status(void)
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55 {
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56 return battery_i_charge_status;
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57 }
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58
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662
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59 void set_charge_state(uint8_t newState)
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60 {
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61 #ifdef ENABLE_CHARGER_STATUS_V2
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62 if(newState < Charger_END)
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63 {
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64 batteryChargerState = newState;
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65 }
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66 #endif
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67 }
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68
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69 uint8_t get_charge_state(void)
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70 {
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71 return batteryChargerState;
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72 }
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73
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38
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74 void init_battery_charger_status(void)
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75 {
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76 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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77 return;
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78 #endif
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79
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80 CHARGE_IN_GPIO_ENABLE();
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81 CHARGE_OUT_GPIO_ENABLE();
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82
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83 ReInit_battery_charger_status_pins();
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84 }
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85
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86 void ReInit_battery_charger_status_pins(void)
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87 {
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88 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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89 return;
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90 #endif
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91
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92 GPIO_InitTypeDef GPIO_InitStructure;
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93
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94 GPIO_InitStructure.Pin = CHARGE_IN_PIN;
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95 GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
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96 GPIO_InitStructure.Pull = GPIO_NOPULL;
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97 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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98 HAL_GPIO_Init(CHARGE_IN_GPIO_PORT, &GPIO_InitStructure);
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99
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100 GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
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101 GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
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102 GPIO_InitStructure.Pull = GPIO_NOPULL;
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103 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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104 HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
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105 }
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106
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107
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108 void DeInit_battery_charger_status_pins(void)
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109 {
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110 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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111 return;
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112 #endif
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113 GPIO_InitTypeDef GPIO_InitStructure;
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114
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115
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116 GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
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117 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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118 GPIO_InitStructure.Pull = GPIO_NOPULL;
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119
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120 GPIO_InitStructure.Pin = CHARGE_IN_PIN;
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121 HAL_GPIO_Init(CHARGE_IN_GPIO_PORT, &GPIO_InitStructure);
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122
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123 GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
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124 HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
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125 }
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126
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127 /* static counter is used to avoid multiple counts of charge startings
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128 and after that it is used, starting at 127 to count for the charge full signal
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129
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130 there a short disconnections with the QI charger
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131 therefore the battery_charger_counter has a countdown instead of = 0.
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132
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133 battery_gas_gauge_set_charge_full and scheduleUpdateDeviceDataChargerFull are
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134 set after disconnection as the charging process continues as long as not disconnected
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135 to prevent the short disconnections the battery_charger_counter is used too including
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136 upcounting again while battery_i_charge_status == 255 and the connection is established
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137
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138 */
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139
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140 void battery_charger_get_status_and_contral_battery_gas_gauge(uint8_t cycleTimeBase)
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141 {
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142 #ifdef ENABLE_CHARGER_STATUS_V2
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143 static uint8_t notifyChargeComplete = 0;
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144 #endif
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145
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146 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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147 return;
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148 #endif
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149
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643
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150 #ifdef ENABLE_CHARGER_STATUS_V2
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662
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151
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152 if(batteryChargerState == Charger_ColdStart) /* wait for the first valid voltage meassurement */
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643
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153 {
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686
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154 if((global.lifeData.battery_voltage != BATTERY_DEFAULT_VOLTAGE) && (global.lifeData.battery_voltage < BATTERY_CHARGER_CONNECTED_VOLTAGE))
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155 {
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156 if(global.lifeData.battery_voltage > BATTERY_ENDOF_CHARGE_VOLTAGE) /* Voltage close to full state => maybe new battery inserted */
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157 {
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158 battery_gas_gauge_set_charge_full();
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159 }
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160 batteryChargerState = Charger_NotConnected;
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161 }
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162 }
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163 else
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164 { /* on disconnection or while disconnected */
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165 if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN))
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166 {
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662
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167 switch(batteryChargerState)
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168 {
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686
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169 case Charger_WarmUp:
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170 case Charger_Active: global.dataSendToMaster.chargeStatus = CHARGER_lostConnection;
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171 global.deviceDataSendToMaster.chargeStatus = CHARGER_lostConnection;
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172 batteryChargerState = Charger_LostConnection;
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173 if(cycleTimeBase > CHARGER_DEBOUNCE_SECONDS) /* adapt connection lost detection to sleep mode */
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174 {
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175 battery_charger_counter = cycleTimeBase + 1;
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176 }
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177 else
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178 {
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179 battery_charger_counter = CHARGER_DEBOUNCE_SECONDS;
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180 }
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181 break;
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686
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182 case Charger_Finished: battery_charger_counter = 0;
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183 batteryChargerState = Charger_LostConnection;
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184 /* no break */
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185 case Charger_LostConnection: /* the charger stops charging when charge current is 1/10 */
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186 /* Basically it is OK to rate a charging as complete if a defined voltage is reached */
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187 if(((battery_gas_gauge_isChargeValueValid() == 0) || (global.lifeData.battery_charge < 90)) && (get_voltage() >= BATTERY_ENDOF_CHARGE_VOLTAGE) && (get_voltage() < BATTERY_CHARGER_CONNECTED_VOLTAGE))
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188 {
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189 notifyChargeComplete = 1;
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190 }
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191 else
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192 {
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193 notifyChargeComplete = 0;
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194 }
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195 if(battery_charger_counter >= cycleTimeBase)
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662
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196 {
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197 battery_charger_counter -= cycleTimeBase;
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198 }
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199 else
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200 {
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201 battery_charger_counter = 0;
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202 battery_i_charge_status = 0;
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203 global.dataSendToMaster.chargeStatus = CHARGER_off;
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204 global.deviceDataSendToMaster.chargeStatus = CHARGER_off;
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205
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662
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206 if(notifyChargeComplete)
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207 {
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208 battery_gas_gauge_set_charge_full();
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209 scheduleUpdateDeviceDataChargerFull();
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210 notifyChargeComplete = 0;
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211 }
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212 batteryChargerState = Charger_NotConnected;
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213 }
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214 break;
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215 default: break;
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216 }
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217 }
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218 else
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219 {
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220 /* connected */
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221 /* wait for disconnection to write and reset */
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222 switch(batteryChargerState)
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223 {
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224 case Charger_NotConnected: battery_i_charge_status = 1;
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225 battery_charger_counter = 0;
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226 batteryChargerState = Charger_WarmUp;
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227 break;
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228 case Charger_LostConnection: batteryChargerState = Charger_Active;
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229 break;
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230 case Charger_WarmUp: battery_charger_counter += cycleTimeBase;
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231 if(battery_charger_counter >= CHARGER_DEBOUNCE_SECONDS )
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232 {
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233 battery_i_charge_status = 2;
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234 scheduleUpdateDeviceDataChargerCharging();
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235 batteryChargerState = Charger_Active;
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236 }
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237 /* no break */
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238 case Charger_Finished:
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239 case Charger_Active: global.dataSendToMaster.chargeStatus = CHARGER_running;
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240 global.deviceDataSendToMaster.chargeStatus = CHARGER_running;
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241
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662
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242 /* drive the output pin high to determine the state of the charger */
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243 GPIO_InitTypeDef GPIO_InitStructure;
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244 GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
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245 GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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246 GPIO_InitStructure.Pull = GPIO_NOPULL;
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247 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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248 HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
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249 HAL_GPIO_WritePin(CHARGE_OUT_GPIO_PORT, CHARGE_OUT_PIN,GPIO_PIN_SET);
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250 HAL_Delay(1);
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251
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252 if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN)) /* high => charger stopped charging */
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253 {
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254 batteryChargerState = Charger_Finished;
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255 global.dataSendToMaster.chargeStatus = CHARGER_complete;
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256 global.deviceDataSendToMaster.chargeStatus = CHARGER_complete;
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257 battery_charger_counter = 30;
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258 notifyChargeComplete = 1;
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259 }
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260 else
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643
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261 {
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262 if(global.lifeData.battery_charge > 100.0) /* still charging but indicator is set to full => decrease to 99% to keep count increasing */
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263 {
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264 battery_gas_gauge_set(99.0);
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265 }
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662
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266 if(batteryChargerState == Charger_Finished) /* voltage dropped below the hysteresis again => charging restarted */
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267 {
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268 batteryChargerState = Charger_Active;
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269 notifyChargeComplete = 0;
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270 }
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643
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271 }
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272
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662
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273 /* restore high impedance to be able to detect disconnection */
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274 GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
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275 GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
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276 GPIO_InitStructure.Pull = GPIO_NOPULL;
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277 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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278 HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
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279 HAL_Delay(1);
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280 break;
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281
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662
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282 default: /* wait for disconnection */
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283 break;
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284 }
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643
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285 }
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286 }
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287 #else
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288 /* on disconnection or while disconnected */
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289 if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN))
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290 {
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291 if(battery_charger_counter)
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292 {
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293 battery_charger_counter--;
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294 global.dataSendToMaster.chargeStatus = CHARGER_lostConnection;
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295 global.deviceDataSendToMaster.chargeStatus = CHARGER_lostConnection;
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296 }
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297 /* max count down to 127+5 or 127+20 */
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298 if((battery_i_charge_status == 255) && battery_charger_counter < 127)
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299 {
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300 // battery_gas_gauge_set_charge_full();
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301 // scheduleUpdateDeviceDataChargerFull();
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302 battery_charger_counter = 0;
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303 }
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304
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305 if(battery_charger_counter == 0)
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306 {
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307 battery_i_charge_status = 0;
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308 global.dataSendToMaster.chargeStatus = CHARGER_off;
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309 global.deviceDataSendToMaster.chargeStatus = CHARGER_off;
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310
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311 }
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312 return;
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313 }
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314
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315 /* connected */
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316
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317 /* wait for disconnection to write and reset */
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318 if(battery_i_charge_status == 255)
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319 {
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320 global.dataSendToMaster.chargeStatus = CHARGER_complete;
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321 global.deviceDataSendToMaster.chargeStatus = CHARGER_complete;
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322
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323 if(((cycleTimeBase > 1) && (battery_charger_counter < 127+5)) || (battery_charger_counter < 127+20))
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324 battery_charger_counter++;
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325 return;
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326 }
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327
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328 if(battery_charger_counter == 0)
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329 battery_i_charge_status = 1;
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330
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331 /* charger is connected and didn't signal full yet */
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332 global.dataSendToMaster.chargeStatus = CHARGER_running;
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333 global.deviceDataSendToMaster.chargeStatus = CHARGER_running;
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334
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335 GPIO_InitTypeDef GPIO_InitStructure;
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336 GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
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337 GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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338 GPIO_InitStructure.Pull = GPIO_NOPULL;
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339 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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340 HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
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341 HAL_GPIO_WritePin(CHARGE_OUT_GPIO_PORT, CHARGE_OUT_PIN,GPIO_PIN_SET);
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342 HAL_Delay(1);
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343
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344
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345 if(battery_charger_counter < 120)
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346 {
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347 if(cycleTimeBase == 1)
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348 battery_charger_counter++;
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349 else
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350 {
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351 battery_charger_counter += 30;
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352 if(battery_charger_counter >= 127)
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353 battery_charger_counter = 126;
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354 }
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355 }
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356 else
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357 if(battery_charger_counter < 127)
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358 {
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359 battery_charger_counter = 127;
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360 if(battery_i_charge_status < 2)
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361 {
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362 battery_i_charge_status = 2;
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363 scheduleUpdateDeviceDataChargerCharging();
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364 }
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365 }
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366
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367 if(battery_charger_counter >= 127)
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368 {
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369 if(HAL_GPIO_ReadPin(CHARGE_IN_GPIO_PORT,CHARGE_IN_PIN) || (get_voltage() >= 4.1f))
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370 {
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371 battery_charger_counter++;
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643
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372 if(((cycleTimeBase > 1) && (battery_charger_counter > 127+5)) || (battery_charger_counter > 127+20))
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373 {
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374 battery_charger_counter = 127;
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375 if(get_voltage() >= 4.1f)
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376 {
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377 battery_i_charge_status = 255;
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378 battery_gas_gauge_set_charge_full();
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379 scheduleUpdateDeviceDataChargerFull();
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380 }
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381 }
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382 }
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383 else
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384 battery_charger_counter = 127;
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385 }
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386
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387 GPIO_InitStructure.Pin = CHARGE_OUT_PIN;
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388 GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
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389 GPIO_InitStructure.Pull = GPIO_NOPULL;
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390 GPIO_InitStructure.Speed = GPIO_SPEED_LOW;
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391 HAL_GPIO_Init(CHARGE_OUT_GPIO_PORT, &GPIO_InitStructure);
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643
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392 #endif
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38
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393 }
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394
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395 /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/
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