Technical Reference Manual (SPNU489A June 2010) problem

Richard Burke

Expert 1910 points

On page 1749 in section 24.4.1 it shows that there is a 65th interrupt vector (for channel 63) at address 0xFFF82100. However, if this address is written to, the phantom vector at address 0xFFF82000 is modified to the same value, thereby destroying its contents.

It therefore looks like channel 63 is unusable if you want to have a phantom vector.

over 15 years ago

0 Michael Sherman over 15 years ago

TI__Prodigy 400 points

Richard,

I am looking into the issue and will try to get you a response ASAP.

-Michael Sherman

0 Haixiao Weng over 15 years ago

TI__Genius 13810 points

Hello Richard,

You are right. VIM on this device only has 64 entries, not 65. This will be fixed in next TRM release.

Regards,

Haixiao

0 Jean-Marc Mifsud over 15 years ago in reply to Haixiao Weng

TI__Mastermind 22375 points

Richard,

I would like to add a comment on this VIM question.

On TMS570LS series, the VIM request 63 is reserved. By default, this request is mapped to VIM channel 63.
Channel 63 does not have a VIM entries in VIM RAM.
If you plan to remap the VIM Request to different VIM Channel, VIM channel 63 cannot be used.

Regards,

Jean-Marc

0 Richard Burke over 15 years ago in reply to Jean-Marc Mifsud

Expert 1910 points

Hi Jean-Marc,

You have summarised the problem well. Basically CHANMAP[63] cannot be used because it has no interrupt vector in VIM RAM.

Regards,

Richard

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Technical Reference Manual (SPNU489A June 2010) problem