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Main.asm
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Main.asm
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;**********************************************************************
; Filename: Battery Charge Control *
; Uses PIC16F876A *
; Date: 1.5 2016 *
; Author: Jose Jesus *
; *
; Uses:
; A/D voltage monitor
; PWM to control battery charger *
; USART data manager
; LCD2X16 display interface
; *
; 4 MHz Osc *
; *
; *
; *
; * *
;
; Tosc = (1/4 MHz) = 0.00000025s = 250ns *
; 1 instruction = TOsc * 4 = 1us *
;
; PWM period = 20KHz
; = [PR2+1]*4*Tosc*(TMR2 prescaler)
; Duty cicle = (CCPR1L<5:4>)*Tosc*(TMR2 prescaler)
; Average voltage = U0 * Duty cicle ????
; RMs= Vp* RootSquare(T1/T)
;
; *
; *
;**********************************************************************
; *
;**********************************************************************
; * *
; Pin assignments: * *
; 2 - RA0-1-AN0 = Painel voltage * *
; 3 - RA1-1-AN1 = U_out
; 4 - RA2-1-AN2 = I_out * *
; 5 - RA3-1-AN3 = NTC temperature *
; 6 - RA4-0 = RS display *
; 7 - RA5-0-AN4 *
; 21 - RB0-0 = D4 display *
; 22 - RB1-0 = D5 display *
; 23 - RB2-0 = D6 display *
; 24 - RB3-0 = D7 display | PGM *
; 25 - RB4-0 = E display * *
; 26 - RB5-1 = button Ok *
; 27 - RB6-1 = button Down | PGC *
; 28 - RB7-1 = button Up | PGD *
; 11 - RC0-0 = alarm sirene !!
; 12 - RC1-0 = DTR *
; 13 - RC2-0-PWM1 = PWM output
; 14 - RC3-0 = DSR
; 15 - RC4-1 = RTS
; 16 - RC5-O = CTS *
; 17 - RC6-0-TX = USART Tx *
; 18 - RC7-1-RX = USART Rx *
;
; *
; *
;**********************************************************************
; *
; ******* Baterias de chumbo/ácido ****** *
; *
; Descarregada ! < 1.75 V_off -> 10,5v *
; Flutuação (normal) 2.15/2.20 V_float -> 12.9v/13.2v *
; Equalização (recarga) 2.36/2.40 V_oct -> 14.16/14.4v *
; Sobretensão (sobrecarga > 2.70 -> 16.2v *
; *
; Equalização (recarga) 10% da capacidade I_blk *
; Flutuaçao 1% " " I_tric *
; Retenção I_blk/5 I_oct *
; *
; *
; *
; *** Compensação da variação da temperatura *** *
; *
; Ref 25ºC: *
; -0.33V por cada +10ºC *
; +0.33V por cada -10ºC *
; *
;**********************************************************************
; Conversão A/D
; U = 6.7353 * (5*AD/1023)
; I = (5 / 1024) * AD / (R=0.33)
;
; Resitência na saÃda 0,31 hom para calculo de I
; ( 1 / (1/1 + 1/1 + 1/1) = 0.33 )
;
;***************************************************************************
; ERRORS:
; 1 - Battery not found or lower from 11 volts
;
;
;***** COMPILATION MESSAGES & WARNINGS *****
ERRORLEVEL -207 ; Found label after column 1.
ERRORLEVEL -302 ; Register in operand not in bank 0.
;***** PROCESSOR DECLARATION & CONFIGURATION *****
; EEPROM addr
DEV_ID equ 0x00
W_CAP equ 0x06
U_MODE equ 0x07
U_ADJ equ 0x08
I_ADJ equ 0x09
R_CNT equ 0x0a
PROCESSOR 16F876a
#include "p16f876a.inc"
; embed Configuration Data within .asm File.
__CONFIG _CPD_OFF & _CP_OFF & _WDT_OFF & _PWRTE_ON & _XT_OSC & _LVP_OFF & _DEBUG_OFF
#define SLOW_CHARGE 1
#define FAST_CHARGE 2
#define OVER_CHARGE 3
#define FLOAT_CHARGE 4
; ********* Math library
extern FXM1616U
extern SetupConfig
#define AEXP 0xa8
#define AARG 0xa7
#define AARGB0 0xa7
#define AARGB1 0xa6
#define AARGB2 0xa5
#define AARGB3 0xa4
#define AARGB4 0xa3
#define AARGB5 0xa2
#define BEXP 0xad
#define BARG 0xac
#define BARGB0 0xac
#define BARGB1 0xab
#define BARGB2 0xaa
#define BARGB3 0xa9
#define TEMPB1 0xb2
#define TEMPB0 0xb3
; #define Vinteger 0xc6
; #define ExpFract 0xc0
; #define BINdata 0xca
;*********************************
#define bin 0xc0 ; separate exp:fraction ex: 5.735 = 5 735
#define bcd 0xc4
#define pti 0xce
#define pto 0xcf
#define ii 0xd0
#define temp 0xd1
#define cnt 0xd2
extern b2bcd
extern bcd2a
;*******************************
;*************************
#define LOW_INLET_VOLTAGE err_flag,0
#define MSG_BLINK err_flag, 1
#define CHARGE_ON err_flag, 2
#define NO_BATTERY err_flag,3
#define RS_ERROR err_flag,3
#define DTR_PIN PORTC,1
#define DSR_PIN PORTC,3
#define RTS_PIN PORTC,4
#define CTS_PIN PORTC,5
;***** MACROS *****
;***** PORT DECLARATION *****
;***** CONSTANT DECLARATION *****
CONSTANT BASE = 0x20 ; base address of user file registers
;***** CONSTANT DECLARATION *****
IFNDEF LCDLINENUM ; use default value, if unspecified
CONSTANT LCDLINENUM = 0x02 ; by default, 2 lines
ENDIF
IFNDEF LCDTYPE ; use default value, if unspecified
CONSTANT LCDTYPE = 0x00 ; standard HD44780 LCD
;CONSTANT LCDTYPE = 0x01 ; EADIP204-4 (w/ KS0073)
ENDIF
IFNDEF LCDSPEED ; use default value, if unspecified
;CONSTANT LCDSPEED = 0x00 ; clk in [0..9] MHz
CONSTANT LCDSPEED = 0x01 ; clk in [9..20] MHz, default
ENDIF
IFNDEF LCDWAIT ; use default value, if unspecified
CONSTANT LCDWAIT = 0x01 ; for Tosc <= 5 MHz
ENDIF
IFNDEF LCDCLRWAIT ; use default value, if unspecified
CONSTANT LCDCLRWAIT = 0x08 ; wait after LCDCLR until LCD is ready again
ENDIF
;***** REGISTER DECLARATION *****
;WCYCLE -> BASE+d'0' ; wait cycle counter
LCDbuf set BASE+d'1' ; LCD data buffer
LCDtemp set BASE+d'2' ; LCD temporary register
; m_lcdv08
LO equ BASE+d'3'
HI equ BASE+d'4'
LO_TEMP set BASE+d'5'
HI_TEMP set BASE+d'6'
TEMP1 equ BASE+d'7' ; Universal Temporary Register
TEMP3 equ BASE+d'8'
TEMP2 equ BASE+d'9'
TEMP4 equ BASE+d'10'
TEMP5 equ BASE+d'11'
LCDFLAGreg equ BASE+d'12'
STR_NUM equ BASE+d'13'
INDEX equ BASE+d'14'
#define Digit0 LCDFLAGreg,0x00 ; LCD busy flag declared within flag register
#define Digit1 LCDFLAGreg,0x01
#define Digit2 LCDFLAGreg,0x02
#define LJustify LCDFLAGreg,0x04 ; swap zeros by space at right if this bit is 0
#define BCflag LCDFLAGreg,0x05
;*** LCD module versions for fixed ports (e.g. PortB) ***
LCDtris equ TRISB
LCDport equ PORTB
; #define LCD_ENtris TRISB,0x04 ; EN on portB,1
; #define LCD_RStris TRISA,0x04 ; RS on portB,2
; #define LCD_RWtris TRISA,0x05 ; RW on portB,3
#define LCD_EN PORTB,0x04 ; Enable Output / "CLK"
#define LCD_RS PORTA,0x04 ; Register Select
;#define LCD_RW Hard connection to ground ; Read/Write
;***** LCD COMMANDS *****
;*** Standard LCD COMMANDS for INIT *** ( HI-NIBBLE only )
; for 4 bit mode: send only one nibble as high-nibble [DB7:DB4]
CONSTANT LCDEM8 = b'0011' ; entry mode set: 8 bit mode, 2 lines
CONSTANT LCDEM4 = b'0010' ; entry mode set: 4 bit mode, 2 lines
CONSTANT LCDDZ = b'1000' ; set Display Data Ram Address to zero
;*** Standard LCD COMMANDS *** ( HI- / LO-NIBBLE )
; USE THESE COMMANDS BELOW AS FOLLOW: "LCDcmd LCDCLR"
CONSTANT LCDCLR = b'00000001' ; clear display: resets address counter & cursor
CONSTANT LCDCH = b'00000010' ; cursor home
CONSTANT LCDCR = b'00000110' ; entry mode set: cursor moves right, display auto-shift off
CONSTANT LCDCL = b'00000100' ; entry mode set: cursor moves left, display auto-shift off
CONSTANT LCDCONT = b'00001100' ; display control: display on, cursor off, blinking off
CONSTANT LCDMCL = b'00010000' ; cursor/disp control: move cursor left
CONSTANT LCDMCR = b'00010100' ; cursor/disp control: move cursor right
CONSTANT LCDSL = b'00011000' ; cursor/disp control: shift display content left
CONSTANT LCDSR = b'00011100' ; cursor/disp control: shift display content right
CONSTANT LCD2L = b'00101000' ; function set: 4 bit mode, 2 lines, 5x7 dots
IF (LCDLINENUM == 0x2)
CONSTANT LCDL1 = b'10000000' ; DDRAM address: 0x00, selects line 1 (2xXX LCD)
CONSTANT LCDL2 = b'11000000' ; DDRAM address: 0x40, selects line 2 (2xXX LCD)
CONSTANT LCDL3 = b'10010100' ; (DDRAM address: 0x14, fallback)
CONSTANT LCDL4 = b'11010100' ; (DDRAM address: 0x54, fallback)
ELSE
CONSTANT LCDL1 = b'10000000' ; DDRAM address: 0x00, selects line 1 (4xXX LCD)
CONSTANT LCDL2 = b'10010100' ; DDRAM address: 0x14, selects line 2 (4xXX LCD)
CONSTANT LCDL3 = b'11000000' ; DDRAM address: 0x40, selects line 3 (4xXX LCD)
CONSTANT LCDL4 = b'11010100' ; DDRAM address: 0x54, selects line 4 (4xXX LCD)
ENDIF
; special configuration for EA DIP204-4
CONSTANT LCDEXT = b'00001001' ; extended function set EA DIP204-4
CONSTANT LCD2L_A = b'00101100' ; enter ext. function set: 4 bit mode, 2 lines, 5x7 dots
CONSTANT LCD2L_B = b'00101000' ; exit ext. function set: 4 bit mode, 2 lines, 5x7 dots
;***** MACROS *****
LCDw macro ; write content of w to LCD
call LCDdata
endm
LCDcmd macro LCDcommand ; write command to LCD
movlw LCDcommand
call LCDcomd
endm
LCD_DDAdr macro DDRamAddress
Local value = DDRamAddress | b'10000000' ; mask command
IF (DDRamAddress > 0x67)
ERROR "Wrong DD-RAM-Address specified in LCD_DDAdr"
ELSE
movlw value
call LCDcomd
ENDIF
endm
LCD_CGAdr macro CGRamAddress
Local value = CGRamAddress | b'01000000' ; mask command
IF (CGRamAddress > b'00111111')
ERROR "Wrong CG-RAM-Address specified in LCD_CGAdr"
ELSE
movlw value
call LCDcomd
ENDIF
endm
clrLCDport macro ; clear/reset LCD data lines
movlw b'11110000' ; get mask
andwf LCDport,f ; clear data lines only
endm
WAIT macro timeconst_1
IF (timeconst_1 != 0)
movlw timeconst_1
call delay_ms
ENDIF
endm
;***** MEMORY STRUCTURE *****
ORG 0x00 ; processor reset vector
clrf PCLATH
goto MAIN
ORG 0x04 ; interrupt vector location
movwf w_save
swapf STATUS,w
movwf status_save
andlw 0x06
btfsc STATUS,Z ; test if we ara in bank0
goto jmp1
movfw status_save ; no, we are not
bcf STATUS,RP0 ; save context to bank0
movwf status_save
bsf STATUS,RP0
movfw w_save
bcf STATUS,RP0
movwf w_save
jmp1
movf FSR,w
movwf fsr_save
movf PCLATH,w
movwf pclath_save
pagesel Timer0_isr
btfsc INTCON,TMR0IF
call Timer0_isr
pagesel UsartRX
banksel PIR1
btfsc PIR1,RCIF
bsf STATUS,RP0
btfsc PIE1,RCIE
call UsartRX
banksel w_save
movf pclath_save,w
movwf PCLATH
movf fsr_save,w
movwf FSR
swapf status_save,w
movwf STATUS
movf w_save,w
retfie
;************** MAIN **************
MAIN
pagesel SetupConfig
call SetupConfig
pagesel MAIN
clrf t_cnt
clrf err_flag
clrf RS_len
clrf RS_sz
clrf RS_chkSum
clrf Requer
clrf V_cal
clrf I_cal
clrf Err_Symbol
movlw 0x0e
movwf Refresh_rate
clrf charge_status
movlw 0x07 ; enable 3 digits Right justify on LCDVal08
movwf LCDFLAGreg
call LCDinit
; LCD Initialization
movlw 0x80
call LCDcomd
movlw 9
call OutText
movlw 0xc0
call LCDcomd
movlw .10
call OutText
; Enter Config mode
movlw 0x0f
movwf t1
L2
movlw .200
call delay_ms
btfsc PORTB,7 ; UP
goto L3 ; if RB7 not pressed goto L3
btfsc PORTB,6 ; Down
goto L3 ; if RB6 not pressed goto L3
movlw .100
call delay_ms
;
movlw 0x80
call LCDcomd ; set Line 1
movlw 0 ; print "Config Tensão"
call OutText
btfss PORTB,6 ; while RB6 not pressed
goto $-1
btfss PORTB,7 ; and while RB7 not pressed
goto $-1
movlw .100
call delay_ms
movlw 'U'
movwf typ
movlw 'V'
movwf uni
movlw 0 ; default 12V
call set_voltage
movlw 'P'
movwf typ
movlw 'A'
movwf uni
movlw 0 ; default index 1 = 40Ah
call set_capacity
goto L4
L3
decfsz t1,F
goto L2
L4
movlw 1 ; LCDClear
call LCDcomd
call initdata
movlw 0x80
call LCDcomd
movlw 2 ; A INICIAR
call OutText
movlw 0xc0
call LCDcomd
movlw 'U'
call LCDdata
movlw '='
call LCDdata
movf V_batt,W
call LCDval08
movlw 'V'
call LCDdata
movlw '/'
call LCDdata
movlw 'P'
call LCDdata
movlw '='
call LCDdata
movf W_batt,W
call LCDval08
movlw 'A'
call LCDdata
movlw 'h'
call LCDdata
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
movlw 0x80
call Beep
;********************************************
clrf TMR0
bsf INTCON, TMR0IE ; enable TMR0 overflow interrupt bits clrf TMR0
bsf INTCON, GIE ; Global INT enable bit
bsf CHARGE_ON
;*********************************************
Loop
; clrwdt
movlw U_in
movwf FSR
movlw b'11000000' ; AN0 U_in
call refresh
;*******************
movlw U_out
movwf FSR
movlw b'11001000' ; AN1 U_out
call refresh
;***************
movlw I_out
movwf FSR
movlw b'11010000' ; AN2 I_out
call refresh
;****************************************
; Calculates the voltage drop in R ( U1-U2)
; movfw I_out
; subwf U_out,f
; btfss STATUS,C
; decf U_out+1
; movfw I_out+1
; subwf U_out+1,f
;***********************************
; if(U_out < 8.4V) set NO_BATTERY
movfw U_out+1
bz err
goto err_ok
err:
bsf NO_BATTERY
movlw 0xf8
movwf Err_Symbol
clrf CCPR1L
movlw 0x0f
andwf CCP1CON,F
goto Control_done
;*************************************
err_ok
btfsc CHARGE_ON
goto teste_ok
movfw Charge_Triger+1
subwf U_out+1,W
teste_ok
movlw SLOW_CHARGE
subwf charge_status,W
btfsc STATUS,Z
goto do_slow
movlw FAST_CHARGE
subwf charge_status,W
btfsc STATUS,Z
goto do_fast
movlw OVER_CHARGE
subwf charge_status,W
btfsc STATUS,Z
goto do_over
movlw FLOAT_CHARGE
subwf charge_status,W
btfsc STATUS,Z
goto do_float
;************************
chk_slow:
; if(U_out < V_off) goto do_slow
movfw U_out+1
subwf V_off+1,W
bnz cmp_Voff
movfw U_out
subwf V_off,W
cmp_Voff
btfss STATUS,C
goto chk_fast
movlw SLOW_CHARGE
movwf charge_status
do_slow:
; I Requer = I_tric - AD_Iout
movf I_tric,W
movwf Requer
movf I_tric+1,W
movwf Requer+1
movf I_out ,W
subwf Requer,F
btfss STATUS,C
decf Requer+1,F
movf I_out+1,W
subwf Requer+1,F
; if ( U_out > V_off ) set FAST
movfw V_off+1
subwf U_out+1,W
bnz cmp_Voff2
movfw V_off
subwf U_out,W
cmp_Voff2
btfss STATUS,C
goto do_it
btfsc STATUS,Z
goto do_it
movlw FAST_CHARGE
movwf charge_status
goto do_it
;********************************
chk_fast:
; if(Uout < V_float) goto do_fast
movfw U_out+1
subwf V_float+1,W
bnz cmp_Vfloat
movfw U_out
subwf V_float,W
cmp_Vfloat
btfss STATUS,C
goto chk_over ;do_float
movlw FAST_CHARGE
movwf charge_status
do_fast:
; I Requer = I_blk - AD_Iout
movf I_blk,W
movwf Requer
movf I_blk+1,W
movwf Requer+1
movf I_out ,W
subwf Requer,F
btfss STATUS,C
decf Requer+1,F
movf I_out+1,W
subwf Requer+1,F
; if (U_out >= V_oct-1) OVER_CHARGE
movfw V_oct+1
subwf U_out+1,W
bnz cmp_Voct2
movlw 1
subwf V_oct,W
subwf U_out,W
cmp_Voct2
btfss STATUS,C
goto do_it
; movlw OVER_CHARGE
; movwf charge_status
; goto do_it
;**********************************
chk_over:
movlw OVER_CHARGE
movwf charge_status
do_over
; if (U_out >= V_oct-1) Req--
movfw V_oct+1
subwf U_out+1,W
bnz cmp_over
movlw 1
subwf V_oct,W
subwf U_out,W
cmp_over
btfss STATUS,C
goto Control_done
movlw 0xff
movwf Requer
movwf Requer+1
; if I_oct >= I_out set FLOAT
movfw I_out+1
subwf I_oct+1,W
bnz cmp_oct
movfw I_out
subwf I_oct,W
cmp_oct
btfss STATUS,C
goto do_it
movlw FLOAT_CHARGE
movwf charge_status
goto do_it
chk_float:
do_float:
; if (U_out > V_float) Req--
movfw V_oct+1 ;V_float+1
subwf U_out+1,W
bnz cmp_float
movfw V_oct ;V_float
subwf U_out,W
cmp_float
btfss STATUS,C
goto incReq
btfsc STATUS,Z
goto Control_done
movlw 0xff
movwf Requer
movwf Requer+1
goto do_it
incReq
movlw 1
movwf Requer
clrf Requer+1
;*********************************************************+
do_it:
movf Requer,W
iorwf Requer+1,W
btfsc STATUS,Z
goto Control_done
btfss CHARGE_ON
goto Control_done
bcf INTCON,TMR0IE
btfss Requer+1,7
call I_goUp
btfsc Requer+1,7
call I_goDown
bsf INTCON,TMR0IE
Control_done
clrf Requer
clrf Requer+1
;****************************************
btfss RCSTA,SPEN ; if USART disable
btfss DTR_PIN ; and DTE inline
goto RS_ON
bsf RCSTA,SPEN ; enable USART
bsf DSR_PIN ; set DSR
RS_ON
btfsc DTR_PIN ; else if DTE offline
goto RS_DONE
bcf RCSTA,SPEN ; disable USART
bcf DSR_PIN ; clear DSR
RS_DONE
movfw RS_chkSum
btfsc STATUS,Z ; if RS_chkSum != 0
goto continue
; we have received a command frame so
bcf INTCON,GIE
call check_cmd ; Parse command frame
bsf INTCON,GIE
continue:
call RBInt_isr
goto Loop
;***************************************
Timer0_isr
bcf INTCON, TMR0IF
incf t_cnt, F
movfw Refresh_rate ; 0x0e
subwf t_cnt,W ; 14 * 0.071s = 0.994
btfss STATUS,Z
return
; case 0x0e -> +- 1.0s
clrf t_cnt
call read_temp
; print charge_status
movlw 0x80
pagesel LCDcomd
call LCDcomd ; set LINE 1
movf charge_status, W
addlw 3
call OutText
;***************************************
; print Volts
movlw 0xc0
pagesel LCDcomd
call LCDcomd
movlw ' '
call LCDdata
movfw U_out
banksel AARGB1
movwf AARGB1
banksel U_out
movfw U_out+1
banksel AARGB0
movwf AARGB0
movlw 0x7d ; 0x80
movwf BARGB0
movlw 0x47 ; 0x97
movwf BARGB1
pagesel FXM1616U
call FXM1616U
movfw AARGB3
banksel LO
movwf LO
banksel AARGB2
movfw AARGB2
banksel HI
movwf HI
banksel AARGB1
movfw AARGB1
banksel LO_TEMP
movwf LO_TEMP
banksel AARGB0
movfw AARGB0
banksel HI_TEMP
movwf HI_TEMP
pagesel LCDval32
call LCDval32
movlw 'V'
call LCDdata
;******************************
; print Amps
movlw ' '
call LCDdata
movlw ':'
call LCDdata
movfw I_out
banksel AARGB1
movwf AARGB1
banksel I_out
movfw I_out+1
banksel AARGB0
movwf AARGB0
movlw 0x5f
movwf BARGB0
movlw 0x73
movwf BARGB1
pagesel FXM1616U
call FXM1616U
movfw AARGB3
banksel LO
movwf LO
banksel AARGB2
movfw AARGB2
banksel HI
movwf HI
banksel AARGB1
movfw AARGB1
banksel LO_TEMP
movwf LO_TEMP
banksel AARGB0
movfw AARGB0
banksel HI_TEMP
movwf HI_TEMP
pagesel LCDval32
call LCDval32
banksel LO
movlw 'A'
call LCDdata
;*******************************
btfss RTS_PIN
call Monitor
;************************************