annotate Small_CPU/Src/batteryGasGauge.c @ 222:9b4b3decd9ba div-fixes-3

Bugfix: correct presentation error in tissues custom view The green vertical line in the N2/He bars show the inspired partial pressures of the respective gasses. Obviously, the tissue partial pressure is always lower on an initial descent, than the inspired partial pressure of the respective gas. Further, when for a given depth, the inspired partial pressure is equal to the tissue partial pressure, the tissue gets fully saturated, so the bars stop at the green line. For N2, a simple presentation error was present. As the body is always saturated with about 75% of N2 (according to the Buelmann algorithm), the tissue N2 was shifted left for that amount, but the inspired N2 line was not. So, the N2 green vertical line was too far to the right. Corrected this. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Fri, 29 Mar 2019 14:00:43 +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****/