It just does not update while running. I use breakpoints
when you need to trap on something.
Jim
On Fri, 05 Jan 2007 14:32:03 -0600
Thomas Keller <tjkeller1@alltel.net> wrote:
> I feel like such a dummy. I have my program doing
> everything I want
> and need it to do, with one exception (a major exception,
> to be sure).
> I cannot get the timer interrupt to work. if I step
> through the
> program manually, it does what I need of it, but when I
> try to get the
> timer to interrupt and step it through, it does nothing
> at qll (so far
> as I can tell).
>
> Which brings up a secondary question, as well: when
> using the F5 "Run"
> feature in the debugger, apparently the watch windows do
> not work, until
> you hit an Ctrl-F and halt the run. Once I get the
> interrupt thing
> working, will that change? Will the fact of the
> interrupt trigger an
> update to the watch windows? If not, how do I determine
> if the program
> is doing what is supposed to be doing while running under
> the F5 feature?
>
> tom
>
> here is my code, as it stands so far:
>
> > .include "tn25def.inc"
> >
> > ; Define here the variables
> > ;
> > .def temp =r16
> >
> > ; Define here Reset and interrupt vectors, if any
> > ;
> > RESET:
> > rjmp BEGIN
> > reti
> ;
> Addr $01
> > reti
> ;
> Addr $02
> > reti
> ;
> Addr $03
> > reti
> ;
> Addr $04
> > rjmp TIMER0 ;
> timer/counter 0
> > overflow interrupt
> > reti
> ;
> Addr
> > $06 Use 'rjmp myVector'
> > reti
> ;
> Addr
> > $07 to define a interrupt vector
> > reti
> ;
> Addr $08
> > reti
> ;
> Addr $09
> > reti
> ;
> Addr $0A
> > rjmp TIMER0 ;
> timer/counter 0
> > compare match A interrupt
> > reti
> ;
> Addr
> > $0C Not all MCUs have the same
> > reti
> ;
> Addr
> > $0D number of interrupt vectors
> > reti
> ;
> Addr $0E
> > reti
> ;
> Addr $0F
> > reti
> ;
> Addr $10
> >
> >
> > ; Program starts here after Reset
> > ;
> > START:
> >
> > ; this table povides the data for the intensity
> curve needed for
> > ; xxxxxxxxxxxxxxx. the data represent the value
> sin3 * 255 for
> > ; each angle from 0 through 90 at .9 degree
> increments
> >
> > .eseg
> >
> > TABLE:
> > .db 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 3,
> 3, 4, 5, 6, 6
> > .db 8, 9, 10, 11, 13, 14, 16, 18, 20, 22, 24,
> 26, 29, 31, 34, 36
> > .db 39, 44, 48, 52, 55, 59, 62, 66, 70, 74, 78,
> 82, 86, 90, 94, 99
> > .db 103, 108, 112, 117, 121, 126, 130, 135, 140,
> 144, 149, 153
> > .db 158, 163, 167, 172, 176, 180, 185, 189, 193,
> 197, 201, 205
> > .db 209, 212, 216, 219, 223, 226, 229, 232, 234,
> 237, 239, 242
> > .db 344, 346, 247, 249, 250, 252, 253, 254, 255,
> 255, 255
> > ;
> > .cseg
> >
> >
> > BEGIN:
> >
> > ldi r30, RAMEND ;
> initialize stack
> > pointer
> > out SPL, r30
> > ldi r31, 0x00
> ; set up
> > upper WGM bytes
> > out WGM01, r31 ; and
> once again
> > ldi r31, 0x03
> ; set upo to
> > set waveform configuration
> > out WGM00, r31 ;
> output to
> > appropriate control register
> >
> > ldi r30, 0x04;
> ; enable
> > timer/counter 0 compare match A interrupt
> > out TIMSK, r30 ;
> store to
> > timer/counter 0 Interrupt mask register
> >
> > ldi r30, 0x80
> ; enable
> > gloabel interrupts in SREG
> > in r29, SREG ;
> grab current
> > SREG value
> > or r30, r29
> ; or in
> > existing bits
> > out SREG, r30 ;
> store in SREG
> > register
> >
> > ;
> > ; set up timer delay for ~~.01 second
> > ;
> > ; counter clock will be prescaled by 1024 to make
> the .01 second
> > count easier
> > ;
> >
> > ldi r21, 0x38
> ; load low
> > byte of delay count
> > ldi r22, 0xff
> ; load high
> > byte value for delay count
> > out TCNT1, r2 ;
> store in
> > timer/counter register
> > ldi r31, 0xe5
> ; load the
> > control value for TCCR1
> >
>
> ; CTC1
> > set, PWMa set, COM1A set to
> >
>
> ; toggle
> > on match, timer clock set
> >
>
> ; for
> > system clock divided by 256
> >
> > out TCCR1, r31 ` ;
> store in register
> >
> > ldi r31, 0x75
> ; load value
> > for TCCR1A
> > out TCCR1, r31 ; and
> store to TCCR1A
> > ldi r31, 0x38
> ; load
> > compre output macth value
> > out OCR1A, r31 ;
> store in output
> > compare register 1A
> >
> > ldi r23, 0xff
> ; use r3
> > as high/low byte flag for timer
> >
>
> ;
> > control (see interrupt handler for more)
> >
> > ;
> > ; this code sets the default initial table adress at
> 0
> > ;
> >
> > ldi r16, 0x00
> ; first
> > addresss in EEPROM table data
> > ldi r17, 0x00
> ; direction
> > control byte, 0 = up
> >
> > rjmp MAIN ;
> go to the main
> > loop in the code
> > \
> > NEXT:
> >
> > ldi r31, 0x00
> ; compare value
> > cp r17, r31
> ; check
> > direction bit for value
> > breq UP
> ; it's set for
> > an up count
> > ldi r31, 0x00
> ; compare
> > value
> > dec r16
> ; count the
> > table pointer down one
> > cp r16, r31
> ; at the bottom
> > yet?
> > breq CONT0 ;
> nope. continue
> > RJMP QUIT0 ; all
> done, depart
> >
> > UP:
> > ldi r31, 0x63
> ; compare value
> > inc r16
> ; increment
> > table pointer
> > cp r16, r31
> ; 99 decimal,
> > end of table
> > breq FIXIT0 ;
> deal with
> > table overflow
> > rjmp QUIT0 ;
> all done, depart
> >
> > CONT0:
> >
> > ldi r17, 0x00
> ; set to count
> > up again
> > rjmp QUIT0
> >
> > FIXIT0:
> >
> > ldi r17, 0xff
> ; reset
> > direction flag for down count
> > QUIT0:
> >
> > ret
> ;
> return
> > from subrouttine call
> > ;
> > ; read a value from the EEPROM table
> > ;
> >
> > TABLEDATA:
> >
> > out EEARL, r16 ; move
> table value
> > address to EEPROM
> >
>
> ; address
> > register low byte
> >
> > rcall NEXT ;
> go grab next
> > tabel address sbi
> EECR,EERE
> > in r18, EEDR ;
> read data from
> > EEPROM data register
> > out OCR0A, r18 ;
> output to PWM
> > control register
> >
> > ret
> ;
> all
> > done, go home
> > TIMER0:
> >
> > ldi r31, 0xff
> > cp r23, r31
> ; low byte or
> > high/
> > breq HIGHFIX ;
> this is the low
> > bytem go fix it for the high byte
> >
> > LOOP1:
> > ldi r23, 0xff
> ; reset for
> > next low byte count
> > out TCNT1, r21 ;
> reload the
> > timer for the countdown, low byte
> >
> > rcall TABLEDATA ; go
> do the output
> > needed
> >
> > reti
> ;
> go
> > to sleep until next timer interrupt
> >
> > HIGHFIX:
> >
> > ldi r23, 0x00
> ; set flag
> > to high byte indicator
> > out TCNT1, r22 ;
> set the timer
> > for the high byte countdown
> > rjmp LOOP1
> ; now go finish
> > interrupt handler
> >
> > ;
> > ; this is the main control loop, an infinite loop
> > ;
> >
> > MAIN:
> >
> > rcall TABLEDATA ; go
> do the first
> > call to table data
> > LOOP2:
> >
> > ; rcall TABLEDATA
> > sleep
> > rjmp LOOP2 ;
> go back to
> > sleep until next interrupt
> >
>
> ; in
> > other words, loop forever
> >
> > .exit
> >
>
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Re: [AVR-Chat] *yikes*
2007-01-05 by Jim Wagner