Mercurial > public > ostc4
view Small_CPU/Src/batteryGasGauge.c @ 240:625d20070261 div-fixes-5
Improvement SPI stability/recoverability
The core part of this commit comes from careful code reading. The core is the
swap of Scheduler_Request_sync_with_SPI(SPI_SYNC_METHOD_SOFT) and
SPI_Start_single_TxRx_with_Master(). This code is sitting in an if-clause
that is triggered on SPI comms failure. Instead of blindly trying to
communicate again (which will very likely fail again), first try to reset
the comms link, and then try to communicate again. That simply makes
more sense in this case.
This is heavily tested, on 2 simple dives, and 5 very long deco schedules
from the simulator (10+ hour deco's), and a lot of small simulated dives
(upto 2h runtime). Of all these tests, only one long session failed after
9 out of 11h runtime. Analyzing that one failure, suggests that the
RTE is looping in some error handler, which (obviously) results in
a SPI comms failure as a result. I consider this not part of this change.
Additionally, some more cleanup is done in this code.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author | Jan Mulder <jlmulder@xs4all.nl> |
---|---|
date | Mon, 08 Apr 2019 11:49:13 +0200 |
parents | f9ba924d188e |
children | b23de15e2861 |
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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); } 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) { #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 = (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); } /************************ (C) COPYRIGHT heinrichs weikamp *****END OF FILE****/