st7lite9

[foby_01192]

Posted on December 05, 2002 at 21:28

st7lite9

[foby_01192]

Posted on December 03, 2002 at 21:04

Hi

I have problems with the timer interrupt.(AT TIMER Overflow interrupt)

I am using indart-st7flite0 for st7lite09B.

I want to ouput as port ''A'' about Temp(var). and generate 10ms time interrupt.

ref. After execute instruction ''rim'' , not operate program.

I don't understand why isn't operation.

[simonharrison9]

Posted on December 04, 2002 at 06:07

Hi,

Could you supply the code?

as text here or attachment?

Simon

Anglia Internal Apps Support

[foby_01192]

Posted on December 04, 2002 at 06:54

st7/

INTEL

#INCLUDE ''ST72FLT0.INC''

INTEL ; intel format

WORDS ;

segment byte at 80-BF 'ram0'

BYTES

.TEMP DS.B 1 ; temp Register

WORDS

segment 'rom' ; rom area

main

CALL ram_clr ; ram clear

CALL timer_init

CLR TEMP

RIM

port_

LD A, #0Fh

LD PADDR,A ; configures port A[0..4] as output

LD PAOR, A

LD A, TEMP

LD X, #0ffH

CP X, TEMP

JRNE port_ret

LD A, #00H

port_ret

LD PADR, A ; writes this value on port A

JP port_

timer_init

LD A, #12h ; count clock :Fcpu

LD ATCSR,A ; OVFIE : Overflow Interrupt Enable

LD A, #0F0h

LD ATRL,A

LD A, #0fh

LD ATRH,A

LD A, #00h

LD CNTRH,A

LD A, #00h

LD CNTRL,A

RET

;***************************************

; Clear RAM (80H - BFH)

;***************************************

ram_clr

LD X, #80H ; 84H-BFH

LD Y, #40H ; 60 Bytes

ram_clr2

LD A, #00H

loop1

LD (X), A

INC X

DEC Y

JRNE loop1

RET

delay

LD Y, #200

d_loop2

LD X,#0FFH

d_loop1 DEC X

JRNE d_loop1

DEC Y

JRNE d_loop2

RET

timer_cap_rtn

INC TEMP

iret

segment 'vectit'

DC.W 0 ; FFE0-FFE1h(Not Used)

DC.W 0 ; FFE2-FFE3h(SPI Peripheral interrupts)

DC.W 0 ; FFE4-FFE5h(LITE TIMER RTC interrupts)

DC.W 0 ; FFE6-FFE7h(LITE TIMER input Capture interrupt)

DC.W timer_cap_rtn ; FFE8-FFE9h(AT TIMER Overflow interrupt)

DC.W 0 ; FFEA-FFEBh(AT TIMER Output Compare interrupt)

DC.W 0 ; FFEC-FFEDh(AVD interrupt)

DC.W 0 ; FFEE-FFEFh(Not Used)

DC.W 0 ; FFF0-FFF1h(Not Used)

DC.W 0 ; FFF2-FFF3h(External interrupt 3)

DC.W 0 ; FFF4-FFF5h(External interrupt 2)

DC.W 0 ; FFF6-FFF7h(External interrupt 1)

DC.W 0 ; FFF8-FFF9h(External interrupt 0)

DC.W 0 ; FFFA-FFFBh

DC.W 0 ; FFFC-FFFDh(Software interrupt)

DC.W main ; FFFE-FFFFh(Reset)

end

[simonharrison9]

Posted on December 05, 2002 at 09:05

Hi,

A few points:

1. in the timer setup, it may be worth

LD A, ATCSR

this will clear any pending interrupt.

2. in the interrupt routine

LD A, ATCSR

must be used to clear the interrupt flag

3. Although i can not see it said in the data,

I would load the ATR H first then L, as normal.

writing to CNTRH and L is pointless, these are read only

The ATR value is loaded to the CNTR at each overflow, an interrupt is also generated.

One other minor point, you have not loaded the RC calibration value from memory to the RC calibration register.

Your flite will be operating around 6.5MHz

regards,

Simon

ANGLIA Internal Apps Support

[foby_01192]

Posted on December 05, 2002 at 21:28

hi

thanks your support.

As insert ''LD A,ATCSR'' in interrupt routine, Solve problem.