+++ /dev/null
-/* This file has been prepared for Doxygen automatic documentation generation.*/\r
-/*! \file *********************************************************************\r
- *\r
- * \brief\r
- * Charge state function for NiMH batteries\r
- *\r
- * Contains the charge state function, in which the NiMH charging\r
- * algorithm is, plus the associated functions.\r
- *\r
- * \par Application note:\r
- * AVR463: Charging NiMH Batteries with BC100 \n\r
- *\r
- * \par Documentation\r
- * For comprehensive code documentation, supported compilers, compiler \r
- * settings and supported devices see readme.html\r
- *\r
- * \author\r
- * Atmel Corporation: http://www.atmel.com \n\r
- * Support email: avr@atmel.com\r
- *\r
- * \r
- * $Name$\r
- * $Revision: 2255 $\r
- * $RCSfile$\r
- * $URL: http://svn.norway.atmel.com/AppsAVR8/avr463_Charging_NiMH_Batteries_with_BC100/trunk/code/IAR/NIMHcharge.c $\r
- * $Date: 2007-08-09 14:47:58 +0200 (to, 09 aug 2007) $\n\r
- ******************************************************************************/\r
-\r
-#include <avr/io.h>\r
-\r
-#include "enums.h"\r
-#include "structs.h"\r
-\r
-#include "battery.h"\r
-#include "charge.h"\r
-#include "chargefunc.h"\r
-#include "main.h"\r
-#include "menu.h"\r
-#include "NIMHspecs.h"\r
-#include "PWM.h"\r
-#include "time.h"\r
-\r
-#ifndef NIMH\r
-#error NIMH not defined in main.h!\r
-#endif // NIMH\r
-\r
-\r
-//******************************************************************************\r
-// Functions\r
-//******************************************************************************\r
-/*! \brief Controls the charging.\r
- *\r
- * This function contains the charging algorithm itself, divided into stages.\n\r
- * For each stage the PWM may be started/stopped, and the timer, \r
- * halt-requirements and charge parameters may be set.\n\r
- * The charging functions return whatever state is next, and as long as no\r
- * errors occur this is the next charging stage.\r
- *\r
- * \note If more stages are needed simply define more states in menu.h, include\r
- * them in \ref menu_state[] in menu.c, then add the cases to this function.\r
- *\r
- * \note This algorithm is for NiMH batteries.\r
- */\r
-unsigned char Charge(unsigned char inp)\r
-{\r
- unsigned char NextState;\r
-\r
- switch (CurrentState) {\r
- // First stage is a prequalification. Attempt to charge battery to 1 V,\r
- // using a 0.1 C current, within 2 minutes.\r
- // If this fails, the battery is likely damaged.\r
- // If it succeeds, start a fast charge.\r
- case ST_PREQUAL:\r
- \r
- // Set up charge current and next state.\r
- ChargeParameters.Current = BattData.Capacity / 10;\r
- ChargeParameters.NextState = ST_FASTCHARGE;\r
- \r
- // Halt charge on voltage limit or timeout.\r
- // Timeout means battery exhaustion.\r
- HaltParameters.HaltFlags = (HALT_VOLTAGE_MAX | HALT_TIME |\r
- HALT_FLAG_EXHAUSTION);\r
- \r
- // Set up voltage limit and temperature limits.\r
- HaltParameters.VoltageMax = BAT_VOLTAGE_PREQUAL;\r
- HaltParameters.TemperatureMin = BAT_TEMPERATURE_MIN;\r
- HaltParameters.TemperatureMax = 35;\r
- \r
- // Reset temperature measurement for HaltNow().\r
- HaltParameters.LastNTC = 0;\r
- \r
- // Start PWM and charge timer before calling the charge function.\r
- PWM_Start();\r
- Time_Set(TIMER_CHG, BAT_TIME_PREQUAL, 0, 0);\r
- \r
- // Call charge function, get next state.\r
- NextState = ConstantCurrent();\r
- break;\r
-\r
-\r
- // Second stage is a fast charge. Charge at 1.0 C for at most 1.5 hours,\r
- // until either rate of temperature increase or voltage reaches limit, or\r
- // the voltage drops sufficiently.\r
- // Timeout doesn't mean battery exhaustion now.\r
- case ST_FASTCHARGE:\r
-\r
- // Set up charge current and next state.\r
- ChargeParameters.Current = BattData.Capacity;\r
- ChargeParameters.NextState = ST_LOWRATECHARGE;\r
- \r
- // Halt charge on voltage limit, timeout, voltage drop or rate of \r
- // temperature increase.\r
- HaltParameters.HaltFlags = (HALT_VOLTAGE_MAX | HALT_TIME |\r
- HALT_VOLTAGE_DROP | HALT_TEMPERATURE_RISE);\r
- \r
- // Set up limits for voltage, voltage drop, temperature and rate of \r
- // temperature increase (1 degree C per minute).\r
- HaltParameters.VoltageMax = BAT_VOLTAGE_MAX;\r
- HaltParameters.VoltageDrop = BAT_VOLTAGE_DROP;\r
- HaltParameters.TemperatureMax = BAT_TEMPERATURE_MAX;\r
- HaltParameters.TemperatureRise = 1;\r
- \r
- // Reset maximum voltage measurement for HaltNow().\r
- HaltParameters.VBATMax = 0;\r
-\r
- // Start timer, PWM should still be running.\r
- Time_Set(TIMER_CHG, BattData.MaxTime, 0, 0);\r
-\r
- // Call charge function, get next state.\r
- NextState = ConstantCurrent();\r
- break;\r
-\r
-\r
- // Last stage is a trickle charge. Charge at 0.1 C for at most 30 minutes,\r
- // until either rate of temperature increase or voltage reaches limit.\r
- case ST_LOWRATECHARGE:\r
- \r
- // Set up charge current and next state.\r
- ChargeParameters.Current = BattData.Capacity / 10;\r
- ChargeParameters.NextState = ST_ENDCHARGE;\r
- \r
- // Halt charge on voltage limit, timeout or temperature rise.\r
- // Use the same requirements as during the last stage (ST_FASTCHARGE).\r
- HaltParameters.HaltFlags = (HALT_VOLTAGE_MAX | HALT_TIME |\r
- HALT_TEMPERATURE_RISE);\r
-\r
- // Start timer, 30 minutes.\r
- Time_Set(TIMER_CHG, 30, 0, 0);\r
- \r
- // Call charge function, get next state.\r
- NextState = ConstantCurrent();\r
- break;\r
-\r
-\r
- // Charging is done!\r
- case ST_ENDCHARGE:\r
-\r
- // Stop the PWM output and flag battery as charged.\r
- PWM_Stop();\r
- BattData.Charged = TRUE;\r
- \r
- // If the other battery is enabled go to ST_BATCON, otherwise\r
- // go to ST_SLEEP.\r
- if (eeprom_read_byte(&BattControl[(BattActive+1)%2]) & BIT_BATTERY_ENABLED) {\r
- NextState = ST_BATCON;\r
- } else {\r
- NextState = ST_SLEEP;\r
- } \r
- break;\r
-\r
-\r
- default: // Shouldn't end up here. Reinitialize for safety.\r
- NextState = ST_INIT;\r
- break;\r
- }\r
-\r
- // Return the next state to main().\r
- return(NextState);\r
-}\r
projects / avr_bc100.git / blobdiff