Problem with interrupt in tmc320c5509a dsp

Sadhna sha

Hi,

I am using CCS Version: 4.2 and the target is TMS320C5509A.The problem arises while setting interrupts.external interrupt (INT1,Software Trap Equivalent SINT16)

is being used.IFR16 gets set when interrupt occurs,but it is not getting routed to ISR correctly.

The vector table starts at the location 0x00100 and it was assigned to IVPD and IVPH registers.So in thememory view i am able to see the address location of the ISR at an offset of 80 from the start.(ie at 0x00180).In the debugging mode while running when interrupt occurs it goes to address location 0x0000A instead of the address of ISR and is getting halted and also IFR16 is getting cleared.Below given is the vector file which i am using. Can you please help me out in mapping the ISR correctly?

* Assembly file to set up interrupt vector table

.include "globals.inc"

.sect ".vectors"

*------------------------------------------------------------------------------

* Global symbols defined here and exported out of this file

*------------------------------------------------------------------------------

.global _VECSTART

.global _fpga_int

*------------------------------------------------------------------------------

* Global symbols referenced in this file but defined somewhere else.

* Remember that your interrupt service routines need to be referenced here.

*------------------------------------------------------------------------------

.ref _c_int00

.def nmi, int2, int3, int4, int5, int6

.def int7, int8, int9, int10, int11, int12, int13

.def int14, int15, int16, int17, int18, int19, int20

.def int21, int22, int23, int24, int25, int26, int27

.def int28, int29

_VECSTART:

.ivec _c_int00,use_reta

nmi .ivec no_isr

nop_16

;int0 .ivec no_isr

; nop_16

;int1 .ivec no_isr

; nop_16

int2 .ivec no_isr

nop_16

int3 .ivec no_isr

nop_16

int4 .ivec no_isr

nop_16

int5 .ivec no_isr ;_McBSP0_Rx_int

nop_16

int6 .ivec no_isr

nop_16

int7 .ivec no_isr

nop_16

int8 .ivec no_isr

nop_16

int9 .ivec no_isr

nop_16

int10 .ivec no_isr

nop_16

int11 .ivec no_isr

nop_16

int12 .ivec no_isr

nop_16

int13 .ivec no_isr

nop_16

int14 .ivec no_isr

nop_16

int15 .ivec no_isr

nop_16

int16 .ivec _fpga_int ;no_isr

nop_16

int17 .ivec no_isr

nop_16

int18 .ivec no_isr

nop_16

int19 .ivec no_isr

nop_16

int20 .ivec no_isr

nop_16

int21 .ivec no_isr

nop_16

int22 .ivec no_isr

nop_16

int23 .ivec no_isr

nop_16

int24 .ivec no_isr

nop_16

int25 .ivec no_isr

nop_16

int26 .ivec no_isr

nop_16

int27 .ivec no_isr

nop_16

int28 .ivec no_isr

nop_16

int29 .ivec no_isr

nop_16

*------------------------------------------------------------------------------

* This is a dummy interrupt service routine used to initialize the IST.

*------------------------------------------------------------------------------

.text

.def no_isr

no_isr:

b #no_isr

*------------------------------------------------------------------------------

Thanks and Regards,

Sadhna Sha

over 13 years ago

0 Archaeologist over 13 years ago

TI__Guru* 84285 points

Could you please post the code where you set IVPD and IVPH?

0 Sadhna sha over 13 years ago in reply to Archaeologist

Prodigy 30 points

Hi,

Thanks for the response.Here is the code portion where i am initialising the IVPD and IVPH registers.

void Init_CPU()
{
//cpu registers

EBSR =0x0221; // Ext. Bus Selection Register
CLKMD = 0x0CB2; // div 2, mult25 fout=180Mhz (0x2002 reset value)
while(!(CLKMD & 0x0001)) // wait for PLL to lock
SYSR =0x0005; // CLKOUT 18MHz
// IODIR_REG =0x007F; // IO Direction register
// IODATA_REG=0x0002; //all port sets 0 except RF_INT
asm(" BSET INTM ");
ST3_55 = 0x1C42;
IVPD = 0x0100;
IVPH = 0x0100;
Init_interrupt();
asm(" BCLR INTM ");
asm(" BSET DBIE16 ");
/* ST3_55 */
asm(" BSET CAEN");
// asm(" BSET MPNMC");
/* ST2_55 */
asm(" BSET RDM");

}

0 Archaeologist over 13 years ago in reply to Sadhna sha

TI__Guru* 84285 points

That needs to be:

IVPD = 0x0100 >> 8; 
IVPH = 0x0100 >> 8;

See the C55x v3.x CPU Reference Guide http://www.ti.com/lit/ug/swpu073e/swpu073e.pdf section 2.8.1, "Interrupt Vector Pointers (IVPD, IVPH)"

0 Sadhna sha over 13 years ago in reply to Archaeologist

Prodigy 30 points

Hi,

Itz working now.Thank you very much for the information..

Regards,

Sadhna sha

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Problem with interrupt in tmc320c5509a dsp