New and I'm having problems!
'************************************************* ***************
'* Name : New_PWM.bas *
'* Author : Roddy Wayne *
'* Notice : Copyright (c) 2008 *
'* : All Rights Reserved *
'* Date : 08/09/2008 *
'* Version : 1.0 *
'* Notes: A PWM for running Hydrogen / Oxygen Generators *
'* with serial output to a Serial LCD Display *
'* (Using an old circuit to do new things!) *
'************************************************* ***************
CLEAR ;always start with clear
DEFINE OSC 4 ;define oscillator speed
DEFINE ADC_BITS 8 ; Sets number of bits in result (Tried 10 but this screwed up
' the LCD display)
DEFINE ADC_CLOCK 3 ; Sets clock source (3=rc)
DEFINE ADC_SAMPLEUS 50 ; Sets sampling time in uS
define DEBUG_REG PORTC
DEFINE DEBUG_BIT 6
define DEBUG_BAUD 2400
DEFINE DEBUG_MODE 0
DEFINE DEBUG_PACING 1000
Low PORTE.2 ;makes low for write only
TRISA = %00000111 ;sets porta 0, 1, & 2, as an inputs (A to D's)
TRISB = %00111111 ;sets bits 6 & 7 portb pins as outputs, 0 thru 5 as inputs
TRISC = %10111111 ;sets port c.6 for serial output
TRISD = %00000011 ;sets PORTD 0,1, lines to inputs, rest to outputs
TRISE = %00000000 ;sets all PORTE lines to output
potpos var BYTE ;this had been a VAR WORD
cellamps VAR word
A2D_V VAR BYTE ; Create A2D_V Value to store result
A2D_V2 Var word ;Create A2D_V2 Value to store result
ADCON1=%00000111 ;Sets the Analog to Digital control register
'************************************************* **************
' I'm fairly new to PIC programming and I DEFINATELY NEED HELP PLEASE!
'
'Above, I have 2 Var Bytes (potpos and A2D_V) and 2 Var Words (cellamps
'and A2D_V2). I would like to display "potpos" as a Decimal number ranging from
'1 to 255 on a serial LCD. I would also like to display the cellamps on this
'serial LCD display. The problem I'm having with this is, the cellamps input
'only ranges from zero to 60 millivolts, with 1 millivolt representing 1 Amp of
'current. The shunt I'm using is a 50 MV / 50 Amp shunt. I've tried changing
'the "DEFINE ADC_BITS" to 10, but this screws up the LCD display's reading on
'both the "potpos" and "cellamps".
'
'
' ANY HELP WILL BE GREATLY APPRECIATED!!!
Start:
If portc.0 = 0 then portb.6 = 0 'If pin 15 is low, make pin 39 low
If Portc.0 = 1 then portb.6 = 1 'If pin 15 is high, make pin 39 high
'When Pin 39 goes high, this turns the
'pump on! I'm using a Darlington pair
'to do this (Part # TIP120) It also turns
'on the "Pump On" LED.
If portc.3 = 0 then portb.7 = 0 'If pin 18 is low, make pin 40 low
If portc.3 = 1 then portb.7 = 1 'If pin 18 is high, make pin 40 high
'When Pin 40 goes high, the "Low Tank
'Water" LED is turned on!
ADCIN 0, A2D_V 'Read channel 0 to A2D_Value
potpos= (((255-1)*A2D_V)/255)
'potpos= 1+(((255-1)*A2D_V)/255)
PAUSE 100
Debug 14, 1, "Pot Position = ", DEC2 potpos, 13
ADCIN 1, A2D_V2 'Read channel 1 to A2D_V2 Value
cellamps= (((255-1)*A2D_V2)/255)
pAUSE 100
Debug "Cell Amps = ", dec2 cellamps, 13
HPWM 2, 127, 17500 'Output is a 17.5 Khz, 50% duty cycle (pin 16)
ADCIN 0, A2D_V ' Read channel 0 to A2D_Value
potpos= (((255-1)*a2d_v)/255)
If (potpos <=%00011100)and(potpos <=%00111111) then percent_40
'Serout on pin 25 of 16F877)
'Pause 200 '
'Debug 1, 14, 1 'Send curser home (Top left of screen)
'if potpos <= 28 and <= 63, then goto 10%
ADCIN 0, A2D_V ' Read channel 0 to A2D_Value
potpos= (((255-1)*a2d_v)/255)
If (potpos <=%01000000)and(potpos <=%01011001) then percent_60
'Pause 200 '
'Debug 1, 1 'Send curser home (Top left of screen)
'if potpos <= 64 and <= 89, then goto 20%
ADCIN 0, A2D_V ' Read channel 0 to A2D_Value
potpos= (((255-1)*a2d_v)/255)
If (potpos <=%01011010)and(potpos <=%01110011) then percent_80
'Pause 200 '
'Debug 1, 1 'Send curser home (Top left of screen)
'if potpos <= 90 and <= 115, then goto 30%
ADCIN 0, A2D_V ' Read channel 0 to A2D_Value
potpos= (((255-1)*a2d_v)/255)
If (potpos <=%01110100)and(potpos <=%01111110) then percent_100
'Pause 200 '
'Debug 1, 1 'Send curser home (Top left of screen)
'if potpos <= 116 and <= 126 4, then goto 40%
If (potpos >=%01011110) Then percent_100
percent_40: 'Throttle is depressed 40%
HPWM 1, 102, 17500
HPWM 2, 127, 17500
Pause 100
DEBUG "PWM = 40%High/60%Low", 32, 32, 1
Pause 400
GoTO start
'percent_50: 'Throttle is depressed <=50%
'HPWM 1, 127, 17500 'Output is a 17.5 Khz, 50% duty cycle (pin 17)
'HPWM 2, 127, 17500 'Output is a 17.5 Khz, 50% duty cycle (pin 16)
'Pause 10
'GoTO start '
percent_60: 'Throttle is depressed 60%
HPWM 1, 153, 17500 'Output is a 17.5 Khz, 60% duty cycle (pin 17)
HPWM 2, 127, 17500 'Output is a 17.5 Khz, 50% duty cycle (pin 16)
Pause 100
DEBUG "PWM = 60%High/40%Low", 32, 32, 1
Pause 400
GoTO start
'percent_70: 'Throttle is depressed 70%
'HPWM 1, 178, 17500 'Output is a 17.5 Khz, 70% duty cycle (pin 17)
'HPWM 2, 127, 17500 'Output is a 17.5 Khz, 50% duty cycle (pin 16)
'Pause 10
'GoTO start
percent_80: 'Throttle is depressed 80%
HPWM 1, 204, 17500 'Output is a 17.5 Khz, 80% duty cycle (pin 17)
HPWM 2, 127, 17500
Pause 100
DEBUG "PWM = 80%High/20%Low", 32, 32, 1
Pause 400
GoTO start
'percent_90: 'Throttle is depressed 90%
'HPWM 1, 230, 17500 'Output is a 17.5 Khz, 90% duty cycle (pin 17)
'HPWM 2, 127, 17500 'Output is a 17.5 Khz, 50% duty cycle (pin 16)
'Pause 10
'GoTO start
percent_100: 'Throttle is fully depressed (100%)
HPWM 1, 253, 17500 'Output is a 17.5 Khz, 100% duty cycle (pin 17)
HPWM 2, 127, 17500
Pause 100
DEBUG "PWM = 99%High/01%Low", 32, 32, 1
Pause 400
GoTO start
End
