Mercurial > public > ostc4
annotate Small_CPU/Src/batteryGasGauge.c @ 331:b4c578caaafb I2C_Improvment
Added plausibility check for pressure values
In case of I2C communication problems at startup the dc jumped into dive mode with depth up to 300m. As no CRC is applied a bit flip may also occure during normal operation without detection => added a plausibility check if last measured value fits to the last measurements
| author | ideenmodellierer |
|---|---|
| date | Wed, 17 Jul 2019 22:43:51 +0200 |
| parents | 2defc8cd93ce |
| children | 2fc08a0d1ec3 |
| rev | line source |
|---|---|
| 38 | 1 /** |
| 2 ****************************************************************************** | |
| 3 * @file batteryGasGauge.c | |
| 4 * @author heinrichs weikamp gmbh | |
| 5 * @version V0.0.1 | |
| 6 * @date 09-Dec-2014 | |
| 7 * @brief LTC2942 Battery Gas Gauge | |
| 8 * | |
| 9 @verbatim | |
| 10 ============================================================================== | |
| 11 ##### stm32f4xx_hal_i2c.c modification ##### | |
| 12 ============================================================================== | |
| 13 The LTC2942 requires an repeated start condition without stop condition | |
| 14 for data reception. | |
| 15 | |
| 16 @endverbatim | |
| 17 ****************************************************************************** | |
| 18 * @attention | |
| 19 * | |
| 20 * <h2><center>© COPYRIGHT(c) 2014 heinrichs weikamp</center></h2> | |
| 21 * | |
| 22 ****************************************************************************** | |
| 23 */ | |
| 24 /* Includes ------------------------------------------------------------------*/ | |
| 330 | 25 #include <string.h> /* memset */ |
| 38 | 26 #include "batteryGasGauge.h" |
| 27 #include "baseCPU2.h" | |
| 28 #include "stm32f4xx_hal.h" | |
| 29 #include "i2c.h" | |
| 30 | |
|
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31 static float battery_f_voltage = 0; |
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32 static float battery_f_charge_percent = 0; |
| 38 | 33 |
| 34 #define BGG_BATTERY_OFFSET (26123) //; 65536-(3,35Ah/0,085mAh) | |
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35 #define BGG_BATTERY_DIVIDER (394) //; 3,35Ah/0,085mAh/100 [%] |
| 38 | 36 |
| 37 float get_voltage(void) | |
| 38 { | |
| 39 #ifdef OSTC_ON_DISCOVERY_HARDWARE | |
| 40 return 3.0f; | |
| 41 #endif | |
| 42 | |
| 43 return battery_f_voltage; | |
| 44 } | |
| 45 | |
| 46 | |
| 47 float get_charge(void) | |
| 48 { | |
| 49 #ifdef OSTC_ON_DISCOVERY_HARDWARE | |
| 50 return 100.0f; | |
| 51 #endif | |
| 52 | |
| 53 return battery_f_charge_percent; | |
| 54 } | |
| 55 | |
| 56 | |
| 57 void init_battery_gas_gauge(void) | |
| 58 { | |
| 59 #ifdef OSTC_ON_DISCOVERY_HARDWARE | |
| 60 return; | |
| 61 #endif | |
| 62 | |
| 63 uint8_t buffer[2]; | |
| 64 buffer[0] = 0x01; | |
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65 |
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66 // F8 = 11111000: |
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67 // Vbat 3.0V (11) |
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68 // Prescale M = 128 (111) |
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69 // AL/CC pin disable (0) |
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70 // Shutdown (0) |
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71 buffer[1] = 0xF8; |
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72 I2C_Master_Transmit(DEVICE_BATTERYGAUGE, buffer, 2); |
| 38 | 73 } |
| 74 | |
| 330 | 75 uint8_t battery_gas_gauge_CheckConfigOK(void) |
| 76 { | |
| 77 #ifdef OSTC_ON_DISCOVERY_HARDWARE | |
| 78 return; | |
| 79 #endif | |
| 80 | |
| 81 uint8_t retval = 0; | |
| 82 uint8_t bufferReceive[10]; | |
| 83 | |
| 84 memset(bufferReceive,0,sizeof(bufferReceive)); | |
| 85 | |
| 86 I2C_Master_Receive(DEVICE_BATTERYGAUGE, bufferReceive, 10); | |
| 87 if(bufferReceive[1] == 0xf8) | |
| 88 { | |
| 89 retval = 1; | |
| 90 } | |
| 91 return retval; | |
| 92 } | |
| 93 | |
|
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94 static void disable_adc(void) |
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95 { |
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96 uint8_t buffer[2]; |
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97 buffer[0] = 0x01; |
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98 |
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99 // according to the datasheet of the LTC2942, the adc shall |
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100 // be disabled when writing to the gauge registers |
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101 |
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102 // 0xF9 = 11111001: |
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103 // see init_battery_gas_gauge() |
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104 // Shutdown (1) |
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105 buffer[1] = 0xF9; |
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106 I2C_Master_Transmit(DEVICE_BATTERYGAUGE, buffer, 2); |
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107 } |
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108 |
| 38 | 109 |
| 110 void battery_gas_gauge_get_data(void) | |
| 111 { | |
| 112 #ifdef OSTC_ON_DISCOVERY_HARDWARE | |
| 113 return; | |
| 114 #endif | |
| 115 | |
| 116 float battery_f_voltage_local; | |
| 117 float battery_f_charge_percent_local; | |
| 118 | |
| 119 uint8_t bufferReceive[10]; | |
| 120 I2C_Master_Receive( DEVICE_BATTERYGAUGE, bufferReceive, 10); | |
| 121 | |
| 122 battery_f_voltage_local = (float)(bufferReceive[8] * 256); | |
| 123 battery_f_voltage_local += (float)(bufferReceive[9]); | |
| 124 battery_f_voltage_local *= (float)6 / (float)0xFFFF; | |
| 125 | |
| 126 // max/full: 0.085 mAh * 1 * 65535 = 5570 mAh | |
| 127 battery_f_charge_percent_local = (float)(bufferReceive[2] * 256); | |
| 128 battery_f_charge_percent_local += (float)(bufferReceive[3]); | |
| 129 battery_f_charge_percent_local -= BGG_BATTERY_OFFSET; | |
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f9ba924d188e
Bugfix: set battery percentage correctly after RTE update
Jan Mulder <jlmulder@xs4all.nl>
parents:
38
diff
changeset
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130 battery_f_charge_percent_local /= BGG_BATTERY_DIVIDER; |
| 38 | 131 |
| 132 if(battery_f_charge_percent_local < 0) | |
| 133 battery_f_charge_percent_local = 0; | |
| 134 | |
| 135 battery_f_voltage = battery_f_voltage_local; | |
| 136 battery_f_charge_percent = battery_f_charge_percent_local; | |
| 137 } | |
| 138 | |
| 139 | |
| 140 void battery_gas_gauge_set_charge_full(void) | |
| 141 { | |
|
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142 disable_adc(); |
| 38 | 143 #ifdef OSTC_ON_DISCOVERY_HARDWARE |
| 144 return; | |
| 145 #endif | |
| 146 | |
| 147 uint8_t bufferSend[3]; | |
| 148 bufferSend[0] = 0x02; | |
| 149 bufferSend[1] = 0xFF; | |
| 150 bufferSend[2] = 0xFF; | |
| 151 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3); | |
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152 init_battery_gas_gauge(); |
| 38 | 153 } |
| 154 | |
| 155 | |
| 156 void battery_gas_gauge_set(float percentage) | |
| 157 { | |
|
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158 |
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159 disable_adc(); |
| 38 | 160 #ifdef OSTC_ON_DISCOVERY_HARDWARE |
| 161 return; | |
| 162 #endif | |
| 163 | |
| 164 uint16_t mAhSend; | |
| 165 | |
| 166 if(percentage >= 100) | |
| 167 mAhSend = 0xFFFF; | |
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168 else { |
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f9ba924d188e
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parents:
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169 mAhSend = (percentage * BGG_BATTERY_DIVIDER) + BGG_BATTERY_OFFSET; |
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parents:
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170 } |
| 38 | 171 |
| 172 uint8_t bufferSend[3]; | |
| 173 bufferSend[0] = 0x02; | |
| 174 bufferSend[1] = (uint8_t)(mAhSend / 256); | |
| 175 bufferSend[2] = (uint8_t)(mAhSend & 0xFF); | |
| 176 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3); | |
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177 init_battery_gas_gauge(); |
| 38 | 178 } |
| 179 | |
| 180 | |
| 181 /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/ |