can't make timer A int work

[adi2]

Posted on November 13, 2003 at 03:52

can't make timer A int work

[adi2]

Posted on November 12, 2003 at 08:15

hi !!

i need your help make timer A (and any type of INT )Work. i use the st72264 ,the indart-stx and the metrowerks compiler. i worte a small application that changes the state of RB port every time Timer A overflow. i encounter 2 issues : 1. the INT does not work 2. when i write TACR1 = TOIE ; asm RIM; i can not communicate with the Micro controller i get an error ''communication error between the indart and the target device'' what can be the reason for that ? i add the small application please advise: unsigned char i=1; unsigned char temp=0; unsigned char Data=0b10101010; void main(void) { PBDDR = 0xFF; PBOR = 0XFF; /* 16 bit timer */ TACR1 = TOIE ; TACR2 = Fcpu8; asm RIM; while(1) { } } interrupt 4 void TIMER_A_INT (void) { if (TASR & TOF)) /* the TOF flag is on */ { temp=TASR; /* for reading the TASR */ TACLR=0; /* clearing the TOF flag */ if (ValBit(Data,i)) PBDR=0xFF; else PBDR=0; i++; if (i==9) i=1; } } Adi.

[seeguard]

Posted on November 12, 2003 at 09:50

I can tell you how it works on ST72F521

1. take a look of the attached file ( vector addres define in *.prm) (your syntax I think it's good for a cosmic compiler.) 2. initialization of registers: void TimerA_init_F(void) { asm(''sim''); // Disable all interrupts. TACR1=0b00000000; TACR2=0b00000000; TOIE=1; // enable interrupt for timer A TACHR = TICK_COUNTER_HIGH; // measurment xx msec value TACLR = TICK_COUNTER_LOW; freeTimerA = TACR; ISPR2 = 0b11111100; // interrupt no.8 bit0&1 priority level 2. if the are 11 the timer A interrupt is disable. asm(''rim''); // Enable interrupts. } 3. interrupt syntax (metrowerks) timer A example #pragma TRAP_PROC SAVE_REGS /*----------------------------------------------------------------------------- ROUTINE NAME : tima_rt INPUT/OUTPUT : None DESCRIPTION : timer Interrupt Service Routine COMMENTS : -----------------------------------------------------------------------------*/ void tima_rt(void) { UINT8 r_status; r_status = TASR; // 1 must be read SET_STATUS(TASK_1MS); TACHR = TICK_COUNTER_HIGH; TACLR = TICK_COUNTER_LOW; // 2must read/write ( 1 & 2 clear the TOF TickCount++; if ( TickCount > TICKS_PER_SECONDS ) { if(!toggle) RD0=1; else RD0=0; toggle =~toggle; SET_STATUS(TASK_1SEC); TickCount = 0; } } 4. good luck ! atz ________________ Attachments : This_is_a_generic_Prm_File.doc : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I0H4&d=%2Fa%2F0X0000000bWU%2FZAmuCpSyf8LOpDoOuYJRzpxOJgdF28eTuXjW8srXDbQ&asPdf=false

[sjo]

Posted on November 12, 2003 at 13:09

There are two ways of declaring an interrupt function in metrowerks.

1. Using the #pragma TRAP_PROC, with this you have to declare hte INTERRUPT addresses in the prm file. 2. use interrupt 1 void trap() - this is set for the trap function. The advantage of this is no mods to the prm file have to be done. PS. it should be configured: interrupt 6 void TIMER_A_INT() for timer a interrupt. Regards sjo

[adi2]

Posted on November 12, 2003 at 13:29

thanks datzmon

and sjo your last line ''it should be configured: interrupt 6 void TIMER_A_INT() for timer a interrupt'' fix every thing to me cause in the datasheet i'm holding it is written that for timer A int the number is 4 !!. i have the august 2003 rev 1.7 . is it the last version ? am i right ? adi.

[sjo]

Posted on November 12, 2003 at 14:13

you have the latest datasheet, however metrowerks use interrupt 0 as reset, 1 as trap etc. this would make timer a interrupt 6. Its just that st don't count reset and trap.

Regards sjo

[adi2]

Posted on November 13, 2003 at 03:52

thanks alot.

adi.