Mercurial > public > ostc4
view Small_CPU/Src/batteryGasGauge.c @ 246:ff0d23625cd5 bm-1
feature: replace Relative GF by saturation, computational only
Replace Relative GF by saturation. The saturation code is derived from
the hwOS repo. This commit only contains the Buhlmann computational part. In
the simulator, the numbers does look sane. The initial ascent from the
bottom phase stops at the deepest deco stop a little over GFlow, which is
correct in my view, as we still have some time to spend on this deepest
stop, and that stop ends very close to GFlow (obviously, a deepest stop
is typically short, as in 1 or 2 minutes). The deco finally ends at the
surface with a saturation value of GFhigh.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author | Jan Mulder <jlmulder@xs4all.nl> |
---|---|
date | Tue, 09 Apr 2019 15:38:31 +0200 |
parents | b23de15e2861 |
children | 2defc8cd93ce |
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/** ****************************************************************************** * @file batteryGasGauge.c * @author heinrichs weikamp gmbh * @version V0.0.1 * @date 09-Dec-2014 * @brief LTC2942 Battery Gas Gauge * @verbatim ============================================================================== ##### stm32f4xx_hal_i2c.c modification ##### ============================================================================== The LTC2942 requires an repeated start condition without stop condition for data reception. @endverbatim ****************************************************************************** * @attention * * <h2><center>© COPYRIGHT(c) 2014 heinrichs weikamp</center></h2> * ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "batteryGasGauge.h" #include "baseCPU2.h" #include "stm32f4xx_hal.h" #include "i2c.h" static float battery_f_voltage = 0; static float battery_f_charge_percent = 0; #define BGG_BATTERY_OFFSET (26123) //; 65536-(3,35Ah/0,085mAh) #define BGG_BATTERY_DIVIDER (394) //; 3,35Ah/0,085mAh/100 [%] float get_voltage(void) { #ifdef OSTC_ON_DISCOVERY_HARDWARE return 3.0f; #endif return battery_f_voltage; } float get_charge(void) { #ifdef OSTC_ON_DISCOVERY_HARDWARE return 100.0f; #endif return battery_f_charge_percent; } void init_battery_gas_gauge(void) { #ifdef OSTC_ON_DISCOVERY_HARDWARE return; #endif uint8_t buffer[2]; buffer[0] = 0x01; // F8 = 11111000: // Vbat 3.0V (11) // Prescale M = 128 (111) // AL/CC pin disable (0) // Shutdown (0) buffer[1] = 0xF8; I2C_Master_Transmit(DEVICE_BATTERYGAUGE, buffer, 2); } static void disable_adc(void) { uint8_t buffer[2]; buffer[0] = 0x01; // according to the datasheet of the LTC2942, the adc shall // be disabled when writing to the gauge registers // 0xF9 = 11111001: // see init_battery_gas_gauge() // Shutdown (1) buffer[1] = 0xF9; I2C_Master_Transmit(DEVICE_BATTERYGAUGE, buffer, 2); } void battery_gas_gauge_get_data(void) { #ifdef OSTC_ON_DISCOVERY_HARDWARE return; #endif float battery_f_voltage_local; float battery_f_charge_percent_local; uint8_t bufferReceive[10]; I2C_Master_Receive( DEVICE_BATTERYGAUGE, bufferReceive, 10); battery_f_voltage_local = (float)(bufferReceive[8] * 256); battery_f_voltage_local += (float)(bufferReceive[9]); battery_f_voltage_local *= (float)6 / (float)0xFFFF; // max/full: 0.085 mAh * 1 * 65535 = 5570 mAh battery_f_charge_percent_local = (float)(bufferReceive[2] * 256); battery_f_charge_percent_local += (float)(bufferReceive[3]); battery_f_charge_percent_local -= BGG_BATTERY_OFFSET; battery_f_charge_percent_local /= BGG_BATTERY_DIVIDER; if(battery_f_charge_percent_local < 0) battery_f_charge_percent_local = 0; battery_f_voltage = battery_f_voltage_local; battery_f_charge_percent = battery_f_charge_percent_local; } void battery_gas_gauge_set_charge_full(void) { disable_adc(); #ifdef OSTC_ON_DISCOVERY_HARDWARE return; #endif uint8_t bufferSend[3]; bufferSend[0] = 0x02; bufferSend[1] = 0xFF; bufferSend[2] = 0xFF; I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3); init_battery_gas_gauge(); } void battery_gas_gauge_set(float percentage) { disable_adc(); #ifdef OSTC_ON_DISCOVERY_HARDWARE return; #endif uint16_t mAhSend; if(percentage >= 100) mAhSend = 0xFFFF; else { mAhSend = (percentage * BGG_BATTERY_DIVIDER) + BGG_BATTERY_OFFSET; } uint8_t bufferSend[3]; bufferSend[0] = 0x02; bufferSend[1] = (uint8_t)(mAhSend / 256); bufferSend[2] = (uint8_t)(mAhSend & 0xFF); I2C_Master_Transmit( DEVICE_BATTERYGAUGE, bufferSend, 3); init_battery_gas_gauge(); } /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/