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It's been a while since I don't program the DSP, but I'll
give it a try. First, check this >>> asm(bfset #0012,X:IPR); Is it decimal 12 or hex 12 ?? IPR = b xxxx xxxx xx11 x11x for both IRQ A and B enabled and edge sensitive (user's manual p. 4-4) Check this setting. Second: where is your #pragma interrupt ?? In your ISR you should have a #pragma interrupt [called|warn|saveall[warn]] Check your Targeting Manual for the sintax. I assume you have your interrup vector correct, otherwise check them. There should be a JSR to your ISR. That's all. I hope I'm not forgetting anything. Please anybody correct me if I'm wrong. First fix this, then try again with the MOVE instructions. Regards, Mariano ----- Original Message ----- From: "praveen" <> To: <> Sent: Saturday, May 01, 2004 7:12 PM Subject: Interrupt concept DSP56801EVm Hi I saw your email ID in the motorola Group. I am trying to run a small interrupt program using IRQA(DSP56F801)but the interrupt action is not occuring when i press IRQA button . The following is the code void main() { int x,y; // STEP 1 : To take care I1 and I0 Bits asm(bfset #$0100,sr); asm(bfclr #$0200,sr); // STEP 2 : Enable Both IRQA and IRQB asm(bfset #0012,X:IPR); // STEP 3 : // ISR definition declareISR(x ,y); declareISR((int)0xE9C8,(int)0x0010); declareISR((int)&isrint,(int)0x0011); while(1); } ///////// This is in another C file and i have declared the header files also. int k; declareISR(int,int) { asm(MOVE Y1,R0); asm(NOP); asm(MOVE Y0,P:(R0)+); } isrint() { k; asm(RTI); } One more thing i found that the instruction asm(MOVE Y1,R0); asm(MOVE Y0,P:(R0)+); is not working properly . But it works properly in the simulator. i.e when i see the program memory after the execution of these instruction there is no change in the memory contents as per the instruction.is there is any register ( I think OMR) should be changed. Please help me with this one. Thanking you Praveen |
Re: Interrupt concept DSP56801EVm
Started by ●May 3, 2004
