Mercurial > public > ostc4
view Small_CPU/Src/batteryGasGauge.c @ 988:d9290c76b840 GasConsumption
OSTC4/5 joined code:
In the previous version code differences between OSTC4/5 were identified using the ENABLE_GPIO_V2 compiler switch. In the new version this is done using the display version as indicator which OSTC model is in used. Since this is detected by Firmware the information is forwarded from there to the RTE. This causes a little delay in the GPIO initialization but this applies only to the cold start of the RTE which should not happen very often.
author | ideenmodellierer |
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date | Sun, 06 Apr 2025 21:02:17 +0200 (5 weeks ago) |
parents | 079bb5b22c06 |
children |
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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 <string.h> /* memset */ #include "batteryGasGauge.h" #include "baseCPU2.h" #include "stm32f4xx_hal.h" #include "i2c.h" static float battery_f_voltage = BATTERY_DEFAULT_VOLTAGE; /* max assumed voltage */ static float battery_f_charge_percent = 0; static uint8_t chargeValueKnown = 0; /* indicator if the charge of the battery is known (for example after a full charge cycle) */ #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: // ADC auto mode (11) // Prescale M = 128 (111) // AL/CC pin disable (00) // Shutdown (0) buffer[1] = 0xF8; I2C_Master_Transmit(DEVICE_BATTERYGAUGE, buffer, 2); } uint8_t battery_gas_gauge_CheckConfigOK(void) { #ifdef OSTC_ON_DISCOVERY_HARDWARE return; #endif uint8_t retval = 0; uint8_t bufferReceive[10]; memset(bufferReceive,0,sizeof(bufferReceive)); I2C_Master_Receive(DEVICE_BATTERYGAUGE, bufferReceive, 10); if(bufferReceive[1] == 0xf8) { retval = 1; } return retval; } 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]; if(I2C_Master_Receive(DEVICE_BATTERYGAUGE, bufferReceive, 10) == HAL_OK) { 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; /* Because of the prescalar 128 the counter assumes a max value of 5570mAh => normalize to 3350mAh*/ battery_f_charge_percent_local /= BGG_BATTERY_DIVIDER; /* transform to percentage */ 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(); chargeValueKnown = 1; } 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(); chargeValueKnown = 1; } uint8_t battery_gas_gauge_isChargeValueValid(void) { return chargeValueKnown; } void battery_gas_gauge_setChargeValueValid(void) { chargeValueKnown = 1; } /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/