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Discussion Groups | TMS320C54x | Setting interrupt vector on TI CCS/5402 DSK
Technical discussions about the TI C54x DSPs (including the c5401, c5402, c5402a, c5404, c5407, c5409, c5409a, c5410, c5410a, c5416, c5420, c5421, c5441, c549, c5470 and c5471).
Setting interrupt vector on TI CCS/5402 DSK - Ben Bradley - Oct 2 17:46:00 2000
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Posted to comp.dsp and I've read through everything I can find on Code Composer Studio, and can't get an interrupt function to be called. It's a C function and has the proper #pragma INTERRUPT (func); before the definition. The documentation seems to not show how to write and compile/assemble source code that sets the vectors. The DSP/BIOS has calls to handle interrupts, but I really don't want to to use the DSP/BIOS. It appears that TI strongly encourages one to write any system to use it, but I'd rather not if I can help it. I'm familiar with how the 54x's IPTR field of the PMST register points to the start of the interrupt vectors, the problem is how to set these vectors. I've had no trouble using interrupts on many other processors, including the Motorola 56824 and the Zilog Z89321 DSP's. ----- http://listen.to/benbradley |
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Re: Setting interrupt vector on TI CCS/5402 DSK - Brian C. Lane - Oct 2 19:54:00 2000
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On Mon, 02 Oct 2000 13:46:14 -0400, you wrote: >Posted to comp.dsp and > > I've read through everything I can find on Code Composer Studio, and >can't get >an interrupt function to be called. It's a C function and has the proper >#pragma >INTERRUPT (func); before the definition. > The documentation seems to not show how to write and compile/assemble >source >code that sets the vectors. The DSP/BIOS has calls to handle interrupts, You need to write the interrupt vector code in assembly, pointing it to your 'C' functions. The assembly guide has some examples, or you can use this code which I modified from the DSK plus examples. I find it safer to call a program specific assembly _processor_init routine which then calls the 'C' initialization routine _c_int00, this way your hardware isn't flopping about while it is initializing ram, etc. This should work for you, but please note that it has been chopped out of some working code without testing, and that I don't use 'C' for any interrupts. In your linker file: MEMORY { PAGE 0 : VECTORS : origin = 0FF80h, length = 00080h } SECTIONS { .vectors : load = VECTORS PAGE 0 } And a separate vectors.asm file .width 80 .length 55 .title "Vector Table" .sect ".vectors" .ref _c_int00 .ref _timer_irq .ref keypad_0 .ref keypad_1 .ref keypad_2 .ref keypad_3 .ref _processor_init .mmregs ;reset goto _c_int00 ;00; RESET reset goto _processor_init ;00; RESET nop nop nmi return_enable ;04; non-maskable external interrupt nop nop nop trap2 return_enable ;08; trap2 nop nop nop .space 52*16 ;0C-3F: vectors for software interrupts 18-30 int0 goto keypad_0 ;40; int0 intrrupt, keypad input line nop nop int1 goto keypad_1 ;44; int1 intrrupt, keypad input line nop nop int2 goto keypad_2 ;48; int2 intrrupt, keypad input line nop nop tint return_enable ;4B; Timer #0 interrupt nop nop nop brint return_enable ;50; BSP receive interrupt nop nop nop bxint return_enable ;54; BSP transmit interrupt nop nop nop dmac0 return_enable ;58; DMA #0 interrupt nop nop nop tint1 return_enable ;5C; Timer #1 or DMA #1 interrupt nop nop nop int3 goto keypad_3 ;60; int3 interrupt, keypad input line nop nop hpiint return_enable ;64; HPIint nop nop nop trint goto _timer_irq ;68; Run the codec and serial port nop nop txint return_enable ;6C; TDM transmit interrupt nop nop nop dmac4 return_enable ;70; DMA #4 interrupt nop nop nop dmac5 return_enable ;74; DMA #5 interrupt nop nop nop .space 8*16 ;78-7F; reserved area ----------------------------------------------------- Brian C. Lane Programmer www.shinemicro.com RF & Microcontroller Design |
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