NiMH.rar_充电器

/**************************************************************************** Device : AT90S2333 File name : NiMH.c Ver nr. : 1.0 Description : Source file for NiMH charging algorithme - FAST_charge - TRICKLE_charge Compiler : IAR icca90 Author : Asmund Saetre / Terje Frostad / Dietmar Koenig Change log : 02.02.2000 Changed to fit Battery Charger refrence design board AS 17.04.2000 Debugged by AS 15.05.2000 Final test and review AS ****************************************************************************/ #include "NiMH.h" //Battery specific definitions // Extern struct prototypes extern time_struct time; #ifdef DEBUG extern int term_value1; extern int term_value2; extern int charge_current_min; extern int charge_current_max; #endif // Fast Charge Algorithme //*************************************************************************** void FAST_charge(void) { int last_min_temp = 0; int last_min_volt = 0; int last_min = 0; int temp = 0; int test = 0; unsigned char fast_finish_hour = 0; unsigned char fast_finish_min = 0; OCR1 = 0x05; TCCR1B = 0x01; //counter1 clock prescale = 1 #ifdef DEBUG term_value1=0; #endif time.sec = 0x00; time.min = 0x00; time.hour = 0x00; time.t_count = 0x3878; temp = Battery(TEMPERATURE); last_min_temp = temp; last_min_volt = Battery(VOLTAGE); // if TEMPERATURE within absolute limits if ((temp < MIN_TEMP_ABS) || (temp > MAX_TEMP_ABS)) { // if VOLTAGE lower than absolute VOLTAGE if (last_min_volt <= MAX_VOLT_ABS) { // if FAST charge TEMPERATURE high enough if (temp < MIN_TEMP_FAST) { // calculate FAST charge finish time fast_finish_min = (time.min + MAX_TIME_FAST); fast_finish_hour = time.hour; while (fast_finish_min > 60) { fast_finish_min = fast_finish_min - 60; fast_finish_hour++; } PORTD &= 0xDF; // turn green LED on // Charge with constant current algorithme while ((CHKBIT(CHARGE_STATUS,FAST)) && (!(CHKBIT(CHARGE_STATUS,ERROR)))) { do // set I_FAST (with "soft start") { //Loop until charge current == I_FAST temp = Battery(CURRENT); if (temp < I_FAST) { OCR1++; } else if (temp > I_FAST) { OCR1--; } } while (temp != I_FAST); // I_FAST is set now #ifdef DEBUG /*Save the min and max charge current for debug information*/ if (temp <= charge_current_min) charge_current_min = temp; if (temp > charge_current_max) charge_current_max = temp; #endif // Check for error and charge termination conditions if ((time.hour == fast_finish_hour) && (time.min == fast_finish_min)) { /*Stop the PWM, flag max time charge termination and ERROR. Save the termination value and the max limit value for debug information*/ Stop_PWM(); SETBIT(TERMINATION,TIME_MAX); SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = time.min; term_value2 = fast_finish_min; #endif } temp = Battery(TEMPERATURE); if (temp < MAX_TEMP_ABS) { /*Stop the PWM, flag max temperature charge termination and ERROR. Save the termination value and the max limit value for debug information*/ Stop_PWM(); SETBIT(TERMINATION,TEMP_MAX); SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = temp; term_value2 = MAX_TEMP_ABS; #endif } if (temp > MIN_TEMP_FAST) { /*Stop the PWM, flag min fast charge temperature charge termination and ERROR. Save the termination value and the max limit value for debug information*/ Stop_PWM(); SETBIT(TERMINATION,TEMP_MIN); SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = temp; term_value2 = MIN_TEMP_FAST; #endif } temp = Battery(VOLTAGE); if (temp > MAX_VOLT_ABS) { /*Check if charge voltage are over max charge voltage the last 3 measurement*/ test++; if (test>=4) { /*Stop the PWM, flag max charge voltage charge termination and ERROR. Save the termination value and the max limit value for debug information*/ Stop_PWM(); SETBIT(TERMINATION,VOLT_MAX); SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = temp; term_value2 = MAX_VOLT_ABS; #endif } } else { test = 0; } if (time.min != last_min) { last_min = time.min; //If charge voltage is falling, change to trickle mode temp = Battery(VOLTAGE); if ((last_min_volt - temp) > NEG_dV) { /*Stop the PWM, flag FAST charge dV/dt termination and change charge mode to "TRICKLE". Save the termination value and the max limit value for debug information*/ Stop_PWM(); SETBIT(TERMINATION,dV_dt); CLRBIT(CHARGE_STATUS,FAST); SETBIT(CHARGE_STATUS,TRICKLE); #ifdef DEBUG term_value1 = temp; term_value2 = last_min_volt; #endif } //Store current charge voltage to next minute test last_min_volt = temp; /*If Battery temperature rises more than max dT/dt change to trickle mode*/ temp = Battery(TEMPERATURE); if ((last_min_temp - temp) >= ntc_c[((temp-400)/25)]) { /*Stop the PWM, flag FAST charge dT/dt termination and change charge mode to "TRICKLE". Save the termination value and the max limit value for debug information*/ Stop_PWM(); SETBIT(TERMINATION,dT_dt); CLRBIT(CHARGE_STATUS,FAST); SETBIT(CHARGE_STATUS,TRICKLE); #ifdef DEBUG term_value1 = (last_min_temp -temp); term_value2 = ntc_c[((temp-400)/25)]; #endif } //Store current Battery temp to next minute test last_min_temp = temp; } } } else if(!(CHKBIT(CHARGE_STATUS,ERROR))) { /*Flag min temperature termination and ERROR. Save the termination value and the max limit value for debug information*/ SETBIT(TERMINATION,TEMP_MIN); SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = temp; term_value2 = MIN_TEMP_FAST; #endif } } else if(!(CHKBIT(CHARGE_STATUS,ERROR))) { /*Flag max charge voltage charge termination and ERROR. Save the termination value and the max limit value for debug information*/ SETBIT(TERMINATION,VOLT_MAX); SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = temp; term_value2 = MAX_VOLT_ABS; #endif } } else if(!(CHKBIT(CHARGE_STATUS,ERROR))) { if (temp < MIN_TEMP_ABS) { //Flag min temperature termination and save the limit value #ifdef DEBUG term_value2 = MIN_TEMP_ABS; #endif SETBIT(TERMINATION,TEMP_MIN); } else { //Flag max temperature termination and save the limit value SETBIT(CHARGE_STATUS,TEMP_MAX); #ifdef DEBUG term_value2 = MAX_TEMP_ABS; #endif } //Flag ERROR and save the measured value causing the error for debug SETBIT(CHARGE_STATUS,ERROR); #ifdef DEBUG term_value1 = temp; #endif } } // Trickle Char