Problem with st7 interrupts

[vlad_r]

Posted on August 24, 2005 at 09:23

Problem with st7 interrupts

[vlad_r]

Posted on August 22, 2005 at 11:15

I am new to st7. I work with st72521 & indart-stx with metrowerk compiler. I wrote code for Real Time clock interrupt. Fcpu 8Mhz

MCCSR=0x0E; ITSPR0=0xD7; My inerrupt function is: #pragma TRAP_PROC SAVE_REGS void Real_Cl() { ; ; } At the end of PRM file I put: VECTOR ADDRESS 0xFFF8 Real_Cl I can't enter this interrupt. I also tried to activate port A interrupt. At the end of PRM file I put: VECTOR ADDRESS 0xFFF6 Int_PA. I used demo board swithes to enter this interrupt with no result. PortA defined as interrupt input: PAOR=0x0F What wrong do you see?

[pbrea]

Posted on August 22, 2005 at 11:20

Hi,

use #pragma TRAP PROC without SAVE REGS Bye

[vlad_r]

Posted on August 22, 2005 at 11:40

Thank you,

the result is the same. The flag - MCCSR bit0 is set. Buy.

[vlad_r]

Posted on August 24, 2005 at 09:23

I wrote C code for Timer A interrupt. Each interrupt entrance I change PortD value according to changing of x in the same interrupt. x is the global volatile unsigned char. The code works well.

The same code but, when I try to change value of PortD in main() acoording to the same x using simple if(x) - the code doesn't work. I opened project in Code Warrior IDE using ST7 New Project Wizard & added only VECTOR ADDRESS for Timer A in .prm. [ This message was edited by: vldxl on 24-08-2005 12:53 ] [ This message was edited by: vldxl on 24-08-2005 12:55 ]