Mapping hardware interrupts in CCS4

Anonymous

Hi All,

I would like to ask on how to map hardware interrupts with software interrupt service routines in CCS 4:

For example, below is some hardware interrupts:

There interrupt numbers are known (24, 25, 26, 27, 28, 29, 30), but how to associate them with interrupt handling functions in CCS?

1. Does this related to .cmd (command) file?

2. Is it imperative for interrupt service routines to be written in assembly code? Can I write them just in C?

Thanks,

Zheng

over 15 years ago

0 desouza over 15 years ago

TI__Guru**** 171729 points

Zheng,

The interrupt mapping is something that CCSv4 or the compiler/assembler/linker tools do not handle directly, therefore I will forward this to the C64x device forum so you can get better insights from the experts there.

Upfront I can tell you that:

1. The mapping procedure is not related to the linker command file, but instead can be configured by either the DSP/BIOS or the CSL. The post below contains interesting information about the subject:

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/99/p/6954/26971.aspx#26971

2. Not at all. The interrupt routines can be completely written in "C" language by using the interrupt keyword before the function definition. If using DSP/BIOS, then you should not use this keyword but instead assign it to one of the HWI methods.

Regards,

Rafael