timer for 1ms

[csameling]

Posted on April 08, 2003 at 05:29

timer for 1ms

[csameling]

Posted on April 03, 2003 at 11:22

hello.

I want to use timerB to generate an interrupt every 1ms.

I try it several times but without success.

Here my initialisation of timerB

TBCR1 = 0b01000000;

TBCR2 = 0b00001000;

TBRS = 0b00000000;

In Interrupt of timerB:

--------------------------------------

int Temp;

if((TBSR & 0b01000000) != 0)

{

#asm

ld A,_TBOC1LR

add A,#$E3

ld Y,A

ld A,_TBOC1HR

adc A,#$03

ld _TBOC1HR,A

ld A,Y

ld _TBOC1LR,A

#endasm

}

Temp = TBOC2LR;

------------------------------------

I use ST72521.

Who can help me and can me say if the code is ok?

regards,

Ampel

[florent2399]

Posted on April 04, 2003 at 01:24

Try this!

void timb_rt(void)

{

unsigned int timer;

if (ValBit(TBSR,6))

{

timer=TBOC1HR<

timer+=TBOC1LR;

timer+= 1000; // int every 1 ms - depends of crystal

// & prediviser settings

TBOC1HR=timer>>8;

TBOC1LR=timer;

...

}

}

Happy programming!

F

[csameling]

Posted on April 04, 2003 at 05:26

Thank you, ''F''.

But is the same code I write only in other words.

But now I have another problem with ST72521:

I enable all interrupt with ''rim'' but none of this reached.

So I searched for a ''initialisation bit'' who enable all interrupts.

Is there any bit I can write and all interrupts enable?

(PS:sorry,my english is bad...)

regards,

Ampel

[florent2399]

Posted on April 04, 2003 at 06:25

Hi Ampel,

There are 2 output compare interrupts/timer. You are currently using OCF1 (bit 6 of TBSR)...Do you clear the OCF2 bit by reading the TBOC2LR register? If not, you have to, otherwise the code execution might be frozen.

Here's an example:

void timb_rt(void)

{

unsigned int timer;

if (ValBit(TBSR,6))

{

timer=TBOC1HR<

timer+=TBOC1LR;

timer+= 1000;

TBOC1HR=timer>>8;

TBOC1LR=timer;

...

}

else TBOC2LR; // means read the register and clear OCF2!!

}

}

Please remember that once you have enable the output compare int, both sources (OCF1 & OCF2 event) are enabled: so you have to care of both cases.

By the way, for 1 ms delay, using 16 Mhz crystal, you should add 0x3e8 better than 0x3e3.

Cheers!

Florent

[csameling]

Posted on April 04, 2003 at 06:45

Ok, I understand. I have this in my code: ''else TBOC2LR; ''

My problem is now another one:

All interrupts are enabled with ''rim''. I mean timerA, timerB, EINT0..3, CAN, SCI, SPI, I2C,......

So, if an interrupt is pending, the code of interrupt should be execute.

I use the debugger inDART ST7 from SofTecMicrosystems (v.1.11) and my own application.

I insert breakpoints to all routines of interrupts and run the application. But nothing happens. I mean: no breakpoint is jumped.

I have my code reduced with an empty main loop. And the interrupts are enabled. But nothing happens!

I can't find the bug!

Is there an problem with initialisation or link command file or anything else I can do wrong?

regards,

Ampel

[florent2399]

Posted on April 04, 2003 at 07:00

I guess that you have a problem in your .prm/map file...Here's my prm file for the ST72321 (= ST72521 minus the CAN device). Please check it!

LINK example.abs

NAMES

main.o

St72321.o+ /* ''+'' is mandatory !!!! */

inter.o

libr.o

/* STARTUP */

ansi.lib

END

STACKSIZE 0xFF

SECTIONS

BITS_RAM = READ_WRITE 0x0080 TO 0x00FF;

MYSTACK = READ_WRITE 0x0100 TO 0x01FF;

BYTE_RAM = READ_WRITE 0x0200 TO 0x087F; /* 2K RAM */

USER_ROM = READ_ONLY 0x1000 TO 0xFFDF;

PLACEMENT

ST7_PA INTO NO_INIT 0x0000 TO 0x0002;

ST7_PB INTO NO_INIT 0x0003 TO 0x0005;

ST7_PC INTO NO_INIT 0x0006 TO 0x0008;

ST7_PD INTO NO_INIT 0x0009 TO 0x000b;

ST7_PE INTO NO_INIT 0x000c TO 0x000e;

ST7_PF INTO NO_INIT 0x000f TO 0x0011;

ST7_I2C INTO NO_INIT 0x0018 TO 0x001e;

ST7_SPI INTO NO_INIT 0x0021 TO 0x0023;

ST7_ITC INTO NO_INIT 0x0024 TO 0x0028;

ST7_FLASH INTO NO_INIT 0x0029 TO 0x0029;

ST7_WDG INTO NO_INIT 0x002A TO 0x002B;

ST7_MCC INTO NO_INIT 0x002C TO 0x002D;

ST7_TIMA INTO NO_INIT 0x0031 TO 0x003F;

ST7_TIMB INTO NO_INIT 0x0041 TO 0x004F;

ST7_SCI INTO NO_INIT 0x0050 TO 0x0057;

ST7_ADC INTO NO_INIT 0x0070 TO 0x0072;

ST7_PWMART INTO NO_INIT 0x0073 TO 0x007d;

DEFAULT_ROM, ROM_VAR, STRINGS INTO USER_ROM;

DEFAULT_RAM INTO BYTE_RAM;

_ZEROPAGE, _OVERLAP INTO BITS_RAM;

SSTACK INTO MYSTACK;

END

PRESTART OFF

/* INTERRUPT VECTOR SETTING : ADDRESS - ROUTINE */

VECTOR ADDRESS 0xfffe main

VECTOR ADDRESS 0xfffc INT_TRAP

VECTOR ADDRESS 0xfffa INT_TLI

VECTOR ADDRESS 0xfff8 INT_MCC

VECTOR ADDRESS 0xfff6 INT_PortA0123

VECTOR ADDRESS 0xfff4 INT_PortF012

VECTOR ADDRESS 0xfff2 INT_PortB0123

VECTOR ADDRESS 0xfff0 INT_PortB4567

VECTOR ADDRESS 0xffee dummy_rt

VECTOR ADDRESS 0xffec INT_Spi

VECTOR ADDRESS 0xffea INT_TimerA

VECTOR ADDRESS 0xffe8 INT_TimerB

VECTOR ADDRESS 0xffe6 INT_Sci

VECTOR ADDRESS 0xffe4 INT_AVD

VECTOR ADDRESS 0xffe2 INT_I2C

VECTOR ADDRESS 0xffe0 INT_PWMART

/***** End of File **********/

Please check your configuration files as well (default.env, makefile, map file) and your it.c file -> #pragma TRAP_PROC SAVE_REGS before each int routine!

Rgds

Florent

[csameling]

Posted on April 04, 2003 at 07:15

Thanks for Your code.

I forget to say I use Cosmic C Compiler.

I guess You use Hiware?

So i try to understand Your code.

[florent2399]

Posted on April 04, 2003 at 07:33

Here's for COSMIC:

vector.c file:

extern void dummy_rt (void);

extern void INT_PortB0123 (void);

extern void INT_TimerA (void);

extern void INT_TimerB (void);

extern void INT_PortB4567 (void);

extern void INT_TRAP (void);

extern void INT_TLI (void);

extern void INT_MCC (void);

extern void INT_I2C (void);

extern void INT_PWMART (void);

extern void INT_PortA0123 (void);

extern void INT_Spi(void);

extern void INT_AVD(void);

extern void INT_Sci(void);

extern void INT_PortF012(void);

extern void _stext(); /* startup routine */

void (* const _vectab[])() = {

INT_PWMART,

INT_I2C,

INT_AVD,

INT_Sci,

INT_TimerB,

INT_TimerA,

INT_Spi,

dummy_rt,

INT_PortB4567,

INT_PortB0123,

INT_PortF012,

INT_PortA0123,

INT_MCC,

INT_TLI,

INT_TRAP,

_stext, /* RESET */

};

batch file:

@echo off

SET OBJPATH=D:\ST72321\OBJECT

SET SOURCEPATH=D:\ST72321\SOURCE

SET ENVPATH=D:\ST72321\CONFIG

cd %SOURCEPATH%

rem del %OBJPATH%\*.o

del %SOURCEPATH%\*.err

cxst7 +modms +debug +split -ov -i %SOURCEPATH% -co %OBJPATH% -e -ce %OBJPATH% -cl %OBJPATH% -v -l crtsi.s vector.c main.c st72c inter.c libr.c

if errorlevel 1 goto bad

:clink

echo.

echo Linking ...

cd %OBJPATH%

clnk -m %ENVPATH%\mapfile.map -o out.st7 %ENVPATH%\link.lkf

if errorlevel 1 goto bad

:chexa

echo.

echo Converting ...

chex -fm -o final.s19 out.st7

if errorlevel 1 goto bad

:cllabs

echo.

echo Generating absolute listing ...

cvdwarf out.st7 out.elf

if errorlevel 1 goto bad

echo.

echo.

echo Successful!

echo.

goto sortie

:bad

echo.

echo.

echo Try again!

echo.

:sortie

echo on

link file

LINK COMMAND FILE FOR TEST PROGRAM

Copyright (c) 1998 by COSMIC Software

+seg .text -b 0x1000 -n .text program start address

+seg .const -a .text -it constants follow code

+seg .bsct -b 0x80 -m 0x80 zero page start address

+seg .ubsct -n iram uninitialized zero page

+seg .data -b 0x200 -m 0x67f -n .data

+seg .share -a iram -is -n .share shared segment

+seg .data -a .share

+seg .bss -b 0x200 -m 0x67f

define the .share segment when using compact or memory models only

''C:\COSMIC\CXST7\lib\crtsi.st7'' startup with auto-init

crtsi.o startup routine

main.o st72o inter.o libr.o

define the .share segment when using compact or memory models only

+seg .share -a iram -is shared segment

float and integer library names depend on the model used

''C:\COSMIC\CXST7\lib\libims.st7''

''C:\COSMIC\CXST7\lib\libm.st7''

+seg .const -b 0xffe0 -k vectors start address

vector.o interrupt vectors

define these symbols if crtsi or crtsx is used

+def __endzp=@.ubsct end of uninitialized zpage

+def __memory=@.bss end of bss segment

Hope it's gonna be successful this time...

Rgds

Florent

[csameling]

Posted on April 04, 2003 at 08:23

Ok, I checked it. There some differenz to my code, but not seriously.

Here my ini of the registers (except CAN-registers (I don't know how)):

PADDR = 0b11111000;

PAOR = 0b00111000;

PBDDR = 0b00011111;

PBOR = 0b01011111;

PCDDR = 0b10101111;

PCOR = 0b10101111;

PDDDR = 0b00111000;

PDOR = 0b00111000;

PEDDR = 0b11110000;

PEOR = 0b11110000;

PFDDR = 0b11111110;

PFOR = 0b11111110;

I2CCR = 0b00000000; // I2C Control Register 1

SPICR = 0b00101100; // SPI Control Register

ISPR0 = 0b10101011; // Register 0

ISPR1 = 0b10100110; // Register 1

ISPR2 = 0b10010010; // Register 2

ISPR3 = 0b11111010; // Register 3

EICR = 0b01001010; // TLI Interrupt not allowed

WDGCR = 0b01111111;

SICSR = 0b00000000;

MCCSR = 0b00000010;

MCCBCR = 0b00000000; // Beep Control Register

TACR1 = 0b00000000;

TACR2 = 0b00001000; // timerA Control Register2

TASR = 0b00000000; // timerA Control/Status Register

TBCR1 = 0b01000000; // timerB Control Register1

TBCR2 = 0b00001000; // timerB Control Register2

TBSR = 0b00000000; // timerB Control/Status Register

SCICR1 = 0b00000000; // SCI Control Register 1

SCICR2 = 0b00000000; // SCI Control Register 2

SCIBRR = 0b11001001; // -> 9.600 Baud

SCIETPR = 0b00000000;

SCIERPR = 0b00000000;

ADCCSR = 0b00000000;

ARTCSR = 0b01111000; // PWM Auto-Reload Timer Control/Status Register

PWMCR = 0b00010000; // PWM Control Register

ARTARR = 0; //256;//PWMmax; // Auto-Reload Register

PWMDCR0 = 256; //0b00000000;

ARTICCSR = 0b00000000;

Can You checked it whether they are correkt or not?

Mainly I mean the ini of the interrupts. The I/Os depend on my application, of course.

regards,

Ampel

[florent2399]

Posted on April 04, 2003 at 09:03

To generate output compare interrupts, you just need to configure the TimerB registers and reset the interrupt mask: your init code seems OK. The problem is somewhere else...a wrong placement of the hardware registers, and nothing can work! So please check once again your batch file/hardware registers declaration/.... -> you can check as well the .map file generated by the compiler to see if all the hardware registers/IT vectors are well placed.

Rgds

Florent