Mercurial > public > ostc4
annotate Small_CPU/Src/batteryGasGauge.c @ 481:89f6857276f8 Improve_Button_Sleep
Bugfix calculation of string center position:
Strings shown on the right side at surface mode use special characters ('\016' and '\017') to switch font size. Headline strings like "Desaturation" could also be set to the target font directly, because they do not contain mixed font sizes, but nethertheless they are using the special characters.
The function calculating the offset needed to display the strinter with center alignment did not consider the small font size => misalignment during string display. To avoid this an evaluation of the special characters has been added to the helper function.
| author | ideenmodellierer |
|---|---|
| date | Mon, 18 May 2020 21:51:08 +0200 |
| parents | aa286a4926c2 |
| children | 1b995079c045 |
| 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 = 6.0; /* max assumed voltage */ |
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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: |
| 433 | 67 // ADC auto mode (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]; | |
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120 |
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121 if(I2C_Master_Receive(DEVICE_BATTERYGAUGE, bufferReceive, 10) == HAL_OK) |
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122 { |
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123 battery_f_voltage_local = (float)(bufferReceive[8] * 256); |
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124 battery_f_voltage_local += (float)(bufferReceive[9]); |
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125 battery_f_voltage_local *= (float)6 / (float)0xFFFF; |
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126 |
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127 // max/full: 0.085 mAh * 1 * 65535 = 5570 mAh |
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128 battery_f_charge_percent_local = (float)(bufferReceive[2] * 256); |
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129 battery_f_charge_percent_local += (float)(bufferReceive[3]); |
| 433 | 130 battery_f_charge_percent_local -= BGG_BATTERY_OFFSET; /* Because of the prescalar 128 the counter assumes a max value of 5570mAh => normalize to 3350mAh*/ |
| 131 battery_f_charge_percent_local /= BGG_BATTERY_DIVIDER; /* transform to percentage */ | |
| 38 | 132 |
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133 if(battery_f_charge_percent_local < 0) |
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134 battery_f_charge_percent_local = 0; |
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135 |
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136 battery_f_voltage = battery_f_voltage_local; |
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137 battery_f_charge_percent = battery_f_charge_percent_local; |
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138 } |
| 38 | 139 } |
| 140 | |
| 141 | |
| 142 void battery_gas_gauge_set_charge_full(void) | |
| 143 { | |
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144 disable_adc(); |
| 38 | 145 #ifdef OSTC_ON_DISCOVERY_HARDWARE |
| 146 return; | |
| 147 #endif | |
| 148 | |
| 149 uint8_t bufferSend[3]; | |
| 150 bufferSend[0] = 0x02; | |
| 151 bufferSend[1] = 0xFF; | |
| 152 bufferSend[2] = 0xFF; | |
| 153 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3); | |
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154 init_battery_gas_gauge(); |
| 38 | 155 } |
| 156 | |
| 157 | |
| 158 void battery_gas_gauge_set(float percentage) | |
| 159 { | |
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160 |
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161 disable_adc(); |
| 38 | 162 #ifdef OSTC_ON_DISCOVERY_HARDWARE |
| 163 return; | |
| 164 #endif | |
| 165 | |
| 166 uint16_t mAhSend; | |
| 167 | |
| 168 if(percentage >= 100) | |
| 169 mAhSend = 0xFFFF; | |
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170 else { |
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171 mAhSend = (percentage * BGG_BATTERY_DIVIDER) + BGG_BATTERY_OFFSET; |
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172 } |
| 38 | 173 |
| 174 uint8_t bufferSend[3]; | |
| 175 bufferSend[0] = 0x02; | |
| 176 bufferSend[1] = (uint8_t)(mAhSend / 256); | |
| 177 bufferSend[2] = (uint8_t)(mAhSend & 0xFF); | |
| 178 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3); | |
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179 init_battery_gas_gauge(); |
| 38 | 180 } |
| 181 | |
| 182 | |
| 183 /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/ |