annotate Small_CPU/Src/batteryGasGauge.c @ 180:9ecc2e60418d Cleanup_Compass_Wireless

Removed not used compass code Code was prepared for usage of LSM303DLHCTR but at the end the OSTC4 was never equipped with this chip
author ideenmodellierer
date Wed, 13 Mar 2019 21:49:25 +0100
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children f9ba924d188e
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38
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1 /**
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2 ******************************************************************************
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3 * @file batteryGasGauge.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 09-Dec-2014
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7 * @brief LTC2942 Battery Gas Gauge
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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 #include "batteryGasGauge.h"
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26 #include "baseCPU2.h"
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27 #include "stm32f4xx_hal.h"
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28 #include "i2c.h"
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29
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30 float battery_f_voltage = 0;
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31 float battery_f_charge_percent = 0;
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32
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33 #define BGG_BATTERY_OFFSET (26123) //; 65536-(3,35Ah/0,085mAh)
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34 #define BGG_BATTERY_DEVIDER (394) //; 3,35Ah/0,085mAh/100 [%]
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35
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36 float get_voltage(void)
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37 {
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38 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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39 return 3.0f;
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40 #endif
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41
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42 return battery_f_voltage;
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43 }
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44
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45
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46 float get_charge(void)
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47 {
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48 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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49 return 100.0f;
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50 #endif
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51
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52 return battery_f_charge_percent;
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53 }
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54
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55
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56 void init_battery_gas_gauge(void)
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57 {
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58 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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59 return;
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60 #endif
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61
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62 uint8_t buffer[2];
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63 buffer[0] = 0x01;
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64 buffer[1] = 0xF8;// true: F8 = 11111000, wrong/old comment: 11101000
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65 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, buffer, 2);
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66 }
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67
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68
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69 void battery_gas_gauge_get_data(void)
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70 {
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71 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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72 return;
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73 #endif
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74
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75 float battery_f_voltage_local;
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76 float battery_f_charge_percent_local;
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77
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78 uint8_t bufferReceive[10];
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79 I2C_Master_Receive( DEVICE_BATTERYGAUGE, bufferReceive, 10);
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80
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81 battery_f_voltage_local = (float)(bufferReceive[8] * 256);
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82 battery_f_voltage_local += (float)(bufferReceive[9]);
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83 battery_f_voltage_local *= (float)6 / (float)0xFFFF;
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84
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85 // max/full: 0.085 mAh * 1 * 65535 = 5570 mAh
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86 battery_f_charge_percent_local = (float)(bufferReceive[2] * 256);
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87 battery_f_charge_percent_local += (float)(bufferReceive[3]);
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88 battery_f_charge_percent_local -= BGG_BATTERY_OFFSET;
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89 battery_f_charge_percent_local /= BGG_BATTERY_DEVIDER;
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90
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91 if(battery_f_charge_percent_local < 0)
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92 battery_f_charge_percent_local = 0;
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93
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94 battery_f_voltage = battery_f_voltage_local;
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95 battery_f_charge_percent = battery_f_charge_percent_local;
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96 }
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97
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98
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99 void battery_gas_gauge_set_charge_full(void)
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100 {
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101 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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102 return;
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103 #endif
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104
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105 uint8_t bufferSend[3];
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106 bufferSend[0] = 0x02;
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107 bufferSend[1] = 0xFF;
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108 bufferSend[2] = 0xFF;
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109 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3);
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110 }
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111
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112
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113 void battery_gas_gauge_set(float percentage)
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114 {
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115 #ifdef OSTC_ON_DISCOVERY_HARDWARE
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116 return;
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117 #endif
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118
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119 uint16_t mAhSend;
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120
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121 if(percentage >= 100)
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122 mAhSend = 0xFFFF;
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123 else
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124 mAhSend = (uint16_t)(percentage * 655.35f);
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125
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126 uint8_t bufferSend[3];
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127 bufferSend[0] = 0x02;
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128 bufferSend[1] = (uint8_t)(mAhSend / 256);
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129 bufferSend[2] = (uint8_t)(mAhSend & 0xFF);
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130 I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3);
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131 }
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132
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133
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134 /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/