/**+
−
  ******************************************************************************+
−
  * @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>&copy; COPYRIGHT(c) 2014 heinrichs weikamp</center></h2>+
−
  *+
−
  ******************************************************************************+
−
  */ +
−
/* Includes ------------------------------------------------------------------*/+
−
#include "batteryGasGauge.h"+
−
#include "baseCPU2.h"+
−
#include "stm32f4xx_hal.h"+
−
#include "i2c.h"+
−
+
−
float battery_f_voltage = 0;+
−
float battery_f_charge_percent = 0;+
−
+
−
#define BGG_BATTERY_OFFSET          (26123)  //; 65536-(3,35Ah/0,085mAh)+
−
#define BGG_BATTERY_DEVIDER         (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;+
−
	buffer[1] = 0xF8;// true: F8 = 11111000, wrong/old comment: 11101000+
−
	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_DEVIDER;+
−
	+
−
	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)+
−
{+
−
	#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);+
−
}+
−
+
−
+
−
void battery_gas_gauge_set(float percentage)+
−
{+
−
	#ifdef OSTC_ON_DISCOVERY_HARDWARE+
−
		return;+
−
	#endif+
−
+
−
	uint16_t mAhSend;+
−
	+
−
	if(percentage >= 100)+
−
		mAhSend = 0xFFFF;+
−
	else	+
−
		mAhSend = (uint16_t)(percentage * 655.35f);+
−
	+
−
	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);+
−
}+
−
+
−
+
−
/************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/+
−