Printable View
hi to all
honest I read the DT_INTS and Timer,PWM operation again,I try to compile the example of Sine wave using DT interrupts by scalerobotics on this forum link http://www.picbasic.co.uk/forum/cont...-DT-interrupts, code gives the following error E:\PROJECT CODE\DT_INTS-18.BAS ERROR Line 23: Redefinition of VAR.
I try to eliminate the error and redownload my "DT_INTS-18.bas" again but the problem still exit
any one can help me
Are you compiling for the PIC18Fx431? Although the application note was written for the PIC16 chips, I used it as a guide to program a much more capable PIC18F2431 chip. The error has to do with redefining this variable:
DEFINE INTLHAND INT_ENTRY_L ' Context saving for Low Priority Ints
But not quite sure why you are getting that, without knowing more about your setup.
Since it was an error at the BASIC level, MCS should have highlighted the line. (you may need to double-click the error line)
Which one was it?
What chip are you using?
What version of PBP are you using?
Did you put the interrupt files in your PBP folder?
Did you modify the program?
Did you include anything else.
Are you using the exact program scalerobitcs gave or are you trying to add it to your existing program.
Help us out here.
Hi!
I manage to compile and modify the example from that link www.picbasic.co.uk/forum/cont...-DT-interrupts, for pic 16877. Because the pic I want to use for three phase spwm signal is (16f777) which has 3 CCP module and I' m waiting for it to come the problem it is not includeded in ISIS simulator that is why I used pic 168777 having 2 CCP module for simulation and is present in ISIS and my college lab. I belive if I manage to generate two phase spwm it became eaasy for 3 phase spmw.
here is the code and attachement of my output from ISIS and mysinelooktable and
define OSC 4
STEPCOUNT var byte
STEPCOUNT1 var byte
STEPCOUNT = 0 'pointer for phase one in sinearray
STEPCOUNT1 = 0 'pointer for phase two in sine array
ADCON0 = %00000000
ADCON1 = %00000000
TRISB = %11111111
TRISC = %11111001 'PMW output for CCP1 AND CCP2
TRISA = %11111111
TMR2 = 117
PR2 = 55 'set for 18Khz HPWM
CCP1CON = %00001100 'set CCP1 for PWM OPERATION
CCP2CON = %00001100 'set CCP2 for PWM OPERATION
T2CON = %00000100 'TIMER2ON and prescale of 1:1
sineval var byte[36]
sineval[0] = 128
sineval[1] = 150
sineval[2] = 171
sineval[3] = 191
sineval[4] = 209
sineval[5] = 225
sineval[6] = 238
sineval[7] = 247
sineval[8] = 253
sineval[9] = 255
sineval[10] = 253
sineval[11] = 247
sineval[12] = 238
sineval[13] = 225
sineval[14] = 209
sineval[15] = 191
sineval[16] = 171
sineval[17] = 150
sineval[18] = 128
sineval[19] = 105
sineval[20] = 84
sineval[21] = 64
sineval[22] = 46
sineval[23] = 30
sineval[24] = 17
sineval[25] = 8
sineval[26] = 2
sineval[27] = 0
sineval[28] = 2
sineval[29] = 8
sineval[30] = 17
sineval[31] = 30
sineval[32] = 46
sineval[33] = 64
sineval[34] = 84
sineval[35] = 105
timerone var word
Temp var byte
Temp1 var byte
INCLUDE "DT_INTS-14.bas" ; Base Interrupt System emp
ASM
INT_LIST macro ; IntSource, Label, Type, ResetFlag?
INT_Handler TMR1_INT, _sine, ASM, yes
endm
INT_CREATE ; Creates the interrupt processor
ENDASM
T1CON = 000001 ; Prescaler = 1;1, TMR1 ON
TMR1L = 255
TMR1H = 254
@ INT_ENABLE TMR1_INT ; Enable Timer 1 Interrupts
timerone = 64980 ;gives about 50 htz sine
Main:
PAUSE 5
GOTO Main
'---[TMR1_INT - interrupt handler]------------------------------------------
sine:
TMR1L = timerone.byte0
TMR1H = timerone.byte1
TeMP = sineval[STEPCOUNT]
CCP1CON.4 = Temp.0 ' bit 0
CCP1CON.5 = Temp.1 ' bit 1
CCPR1L = Temp >>2 'Bit 2-7
TeMP1 = sineval[STEPCOUNT1]
CCP2CON.4 = Temp.0 ' bit 0
CCP2CON.5 = Temp.1 ' bit 1
CCPR2L = Temp >>2 'Bit 2-7
if stepcount = 36 then stepcount =0
if stepcount1 = 24 then stepcount1 =0
stepcount = stepcount +1
stepcount = stepcount1 +1
@ INT_RETURN
any one can help me