?? lion.lst
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.equ R8_9 = 2200 ; Scaling resistor R8 and R9 value(ohm)
.equ R16_17 = 10000 ; Scaling resistor R17 and R18 value(ohm)
.equ R18 = 4 ; Current sense resistor value 1/4 ohm(0.25)
.equ min_I = 50 ; Terminate charge when current drops below min_I, 50mA/cell
.equ max_time_fast = 30 ; Maximum Fast Charge Time = 30 min
.equ max_time_trickle = 30 ; Maximum trickle Charge Time = 90 min at 1C current
;*************************[ Charge Conditions ]***************************
; Fast Charge Current Limit
.equ I_fast = 871 ; See formula above for calculations
; Fast Charge Voltage Limit
.equ max_V_fast = 957 ; See formula above for calculations
; Trickle Charge Current Limit
.equ I_trickle = 22 ; See formula above for calculations
; Trickle Charge Voltage Limit
.equ max_V_trickle = 957 ; max_V_trickle = max_V_fast
;*************************[ Charge Termination Conditions ]***************
; Minimum Fast Charge Current
.equ min_I_fast = 58
.equ V_tolerance = 11
;*************************[ Interrupt Vector Table ]**********************
; Execution always starts here
.org 0x00
000000 e005 ldi temp, 0x05
000001 bf03 out TCCR0, temp ; TCNT0 CK/1024
000002 e401 ldi temp, 0x41 ; TCNT1 8-bit PWM @ 100 kHz
000003 bf00 out TCCR1, temp ; output DISCONNECTED
000004 c056 rjmp fast_charge
.org OVF0addr
;*****************[ Timer 0 Overflow Interrupt Handler ]******************
Timer0_OVF_Int:
000005 b61f in SREG_Storage, SREG ; Store SREG Contents
000006 952a dec tick_cnt ; Decrement tick Counter
000007 f431 brne t0ovf_exit
; This code is executed once a second
000008 e026 ldi tick_cnt, sec_duration ; Reset Tick Counter
; *** Insert user code here (approx 1 second)
000009 9533 inc t_sec ; Increment second counter
00000a 333d cpi t_sec, min_duration
00000b f411 brne t0ovf_exit ; Test second overflow
; This code is executed once a minute
00000c 2733 clr t_sec ; Clear Second Counter
; *** Insert user code here (approx 1 minute)
00000d 9543 inc t_min ; Increment Minutes Counter
t0ovf_exit:
00000e be1f out SREG, SREG_Storage ; Restore SREG
00000f 9518 reti
;*************************[ PWM Control ]*********************************
; Functions to start and stop PWM output
start_PWM:
000010 e601 ldi temp, 0x61
000011 bf00 out TCCR1, temp ; TCNT1 8-bit PWM @ 100 kHz
000012 9508 ret
stop_PWM:
000013 98c1 cbi PORTB, PWM_PIN ; Lock current to zero
000014 9ab9 sbi DDRB, PWM_PIN
000015 e401 ldi temp, 0x41
000016 bf00 out TCCR1, temp ; Disconnect PWM output
000017 9508 ret
;*******************[function F_measure: Measure all Parameters ]***************
; Measure Charge Parameters
f_measure:
000018 e401 ldi temp,ADC_T_channel ; Select Temperature Channel
000019 d00e rcall convert_average ; Measure Battery Temperature
00001a 2da5 mov Tl, av_l
00001b 2db6 mov Th, av_h ; Record value
00001c e407 ldi temp,ADC_gain_channel ; Select Current Channel
00001d d00a rcall convert_average ; Measure Battery Current
00001e 2d85 mov Il, av_l
00001f 2d96 mov Ih, av_h ; Record value
000020 fd51 sbrc control,NO_PWM ; Check control
000021 dff1 rcall stop_PWM ; Stop PWM to measure battery voltage,
000022 e403 ldi temp,ADC_V_channel ; Select Voltage Channel
000023 d004 rcall convert_average ; Measure Battery Charge Voltage
000024 2d65 mov Vl, av_l
000025 2d76 mov Vh, av_h ; Record value
000026 dfe9 rcall start_PWM
; ldi temp,ADC_g_offset_channel ; Select Current Channel
; rcall convert_average
000027 9508 ret
;*************************[ ADC Handler ]*********************************
; This function measures the channel selected by [temp], and returns the
; converted value in [av_h:av_l]
convert_average:
000028 b907 out ADMUX, temp ; Set ADC Channel
000029 2455 clr av_l
00002a 2466 clr av_h ; Clear Average Registers
00002b e110 ldi temp2,(1<<avg_loop_cnt) ; Set loop counter
00002c ed04 ldi temp,0xD4
00002d b906 out ADCSR,temp
00002e 9a36 sbi ADCSR, ADSC ; Start A/D Conversions
convert_wait:
00002f 9b34 sbis ADCSR, ADIF
000030 cffe rjmp convert_wait ; Wait for Conversion to finish
000031 b104 in temp, ADCL
000032 0e50 add av_l, temp
000033 b105 in temp, ADCH
000034 1e60 adc av_h, temp ; Add measured value to average
000035 951a dec temp2
000036 f7b9 brne convert_start ; Repeat (1<<avg_loop_cnt) times
000037 e014 ldi temp2, avg_loop_cnt ; Set shift counter
convert_avg:
000038 9466 lsr av_h
000039 9457 ror av_l ; av_h:av_l = av_h:av_l/2
00003a 951a dec temp2
00003b f7e1 brne convert_avg ; Repeat (avg_loop_cnt) times
00003c 9837 cbi ADCSR,ADEN
00003d 9508 ret ; return to measure
f_terminate_error:
00003e dfd4 rcall stop_PWM
error_loop:
00003f cfff rjmp error_loop
;*******************[ Adjust Charge Current ]****************
; Adjust Charge Current
adj_charge:
000040 170c cp temp, chargel
000041 071d cpc temp2,chargeh
000042 f040 brlo f_dec
000043 17c0 cp chargel,temp ;if( I < I_fast )
000044 07d1 cpc chargeh,temp2
000045 f448 brsh f_end ; increase charge current
f_inc:
000046 b50e in temp, OCR1A ; increment charge current
000047 5f0f subi temp, 0xFF ; if( OCR1A < 0xFF )
000048 f430 brcc f_end
000049 bd0e out OCR1A, temp
00004a c004 rjmp f_end
f_dec:
00004b b50e in temp, OCR1A ; decrement charge current
00004c 5001 subi temp, 0x01 ; if( OCR1A > 0x00 )
00004d f008 brcs f_end
00004e bd0e out OCR1A, temp
00004f 9508 f_end:ret
;*******************[Check Temperature ]********************
; checking temperature and time, terminate if outside range
check_temperature:
000050 e001 ldi temp, high(max_T_abs)
000051 37a5 cpi Tl, low(max_T_abs) ; Temperature too high? (T_max)
000052 07b0 cpc Th, temp
000053 f350 brlo f_terminate_error ; Yes, terminate and flag error
000054 e002 ldi temp, high(min_T_abs)
000055 3ca7 cpi Tl, low(min_T_abs) ; Temperature too low? (T_min)
000056 07b0 cpc Th, temp
000057 f730 brsh f_terminate_error ; Yes, terminate and flag error
000058 314e cpi t_min, max_time_fast
000059 f720 brsh f_terminate_error ; timeout (test minutes only)
00005a 9508 ret
;*******************[ Fast Charge: Reset ]********************************
; Start Fast Charge Cycle
; Reset Charge Parameters
fast_charge:
00005b e605 ldi temp, 0x65
00005c bf0d out 0x3D, temp ; Initialize Stack (emulator only)
00005d ef0f ldi temp,0xFF
00005e bd0d out OCR1B,temp
00005f e002 ldi temp, 0x02
000060 bf09 out TIMSK, temp ; Enable TCNT0 overflow interrupt
000061 98c1 cbi PORTB, PWM_PIN ; Set Port B levels
000062 9ab9 sbi DDRB, PWM_PIN ; Set Port B directions
000063 e050 ldi control, 0x00 ; No events active
000064 e026 ldi tick_cnt, sec_duration ; Tick counter = 0
000065 24ee clr last_t_min
000066 9478 sei ; global interrupt enable
000067 e051 ldi control, NO_PWM ; Set charge control to measure battery voltage
000068 e040 ldi t_min, 0x00
000069 e030 ldi t_sec, 0x00 ; Reset Fast Charge Timer
00006a e000 ldi temp, 0x00
00006b bd0e out OCR1A, temp ; Minimum Duty Cycle
00006c dfa3 rcall start_PWM
;*******************[ Fast Charge: Check battery]********************
charge_loop:
00006d dfaa rcall f_measure
00006e dfe1 rcall check_temperature
;*******************[ Fast Charge: Adjust Charge Current ]****************
; Adjust Charge Voltage and Current
00006f e607 ldi temp,low(I_fast)
000070 e013 ldi temp2, high(I_fast)
000071 2fc8 mov chargel,Il
000072 2fd9 mov chargeh,Ih
000073 dfcc rcall adj_charge
;*******************[ Fast Charge: Terminate Test ]***********************
f_terminate_test:
000074 e003 ldi temp, high(max_V_fast)
000075 3b6d cpi Vl, low(max_V_fast)
000076 0770 cpc Vh, temp ; if( V > V_fast )
000077 f3a8 brlo charge_loop ; terminate fast charge
;*******************[ Fast Charge: Constant voltage loop ]***********************
000078 e050 ldi control, 0x00 ; Clear Charge Control Register
fV_voltage_loop:
000079 df9e rcall f_measure
00007a e405 ldi temp,ADC_g_offset_channel ; Select Current offset Channel
00007b dfac rcall convert_average ; Measure offset value
00007c 1985 sub Il, av_l ; Subtract offset from measured value
00007d 0996 sbc Ih, av_h
00007e f412 brpl pos
00007f 2788 clr Il ; Reset if negative value
000080 2799 clr Ih
pos:
000081 eb0d ldi temp,low(max_V_fast)
000082 e013 ldi temp2,high(max_V_fast) ; Load constant V value
000083 2fc6 mov chargel,Vl
000084 2fd7 mov chargeh,Vh
000085 dfba rcall adj_charge ; Adjust charge voltage
;*******************[ Fast Charge: Terminate test, constant voltage loop ]***********************
000086 dfc9 rcall check_temperature
000087 e000 ldi temp,high(min_I_fast) ; if( I < I_min )
000088 338a cpi Il,low(min_I_fast)
000089 0790 cpc Ih,temp
00008a f770 brsh fV_voltage_loop
;*******************[ Fast Charge: Terminate ]****************************
; Terminate Fast Charge Cycle
00008b df87 rcall stop_PWM ; Disable PWM Output
; Continue with Trickle Charge
;*******************[ Trickle Charge ]************************************
; Reset Charge Parameters
00008c e051 ldi control, NO_PWM ; Set charge control to measure battery voltage
00008d e040 ldi t_min, 0x00
00008e bd4e out OCR1A, t_min ; Minimum Duty Cycle
00008f df80 rcall start_PWM ; Start PWM
;*******************[ Trickle Charge: Check Temperature ]*****************
t_charge_loop:
000090 df87 rcall f_measure
000091 dfbe rcall check_temperature
;*******************[ Trickle Charge: Adjust Charge Current ]*************
; Adjust charge Current
000092 e106 ldi temp, low(I_trickle)
000093 e010 ldi temp2, high(I_trickle) ; Load trickle charge current
000095 2fd9 mov chargeh,Ih
000096 dfa9 rcall adj_charge ; Adjust charge current
;*******************[ trickle Charge: Terminate Test ]***********************
t_terminate_test:
000097 e003 ldi temp, high(max_V_trickle)
000098 3b6d cpi Vl, low(max_V_trickle)
000099 0770 cpc Vh, temp ; if( V > V_trickle )
00009a f3a8 brlo t_charge_loop ; terminate trickle charge
;*******************[ trickle Charge: Constant voltage loop ]***********************
00009b e050 ldi control, 0x00 ; Clear Charge Control Register
tV_voltage_loop:
00009c df7b rcall f_measure
00009d eb0d ldi temp,low(max_V_trickle)
00009e e013 ldi temp2,high(max_V_trickle)
00009f 2fc6 mov chargel,Vl
0000a0 2fd7 mov chargeh,Vh
0000a1 df9e rcall adj_charge
;*******************[ Trickle Charge: Terminate test, constant voltage loop ]***********************
tV_terminate_test:
0000a2 e000 ldi temp,high(min_I_fast) ; if( I < I_fast )
0000a3 338a cpi Il,low(min_I_fast)
0000a4 0790 cpc Ih,temp
0000a5 f7b0 brsh tV_voltage_loop
t_terminate:
0000a6 df6c rcall stop_PWM
0000a7 cfff done: rjmp done
Assembly complete with no errors.
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