Interrupt Driven Program does not work at full speed.

Timothy Sapio

Other Parts Discussed in Thread: TMS320C5505

TMS320C5505 ezDSP Rev.D

I am using the I2S bus in DMA mode and am trying to merge in code that sends signals to GPIO pins. When I step through the program in the debugger, everything works fine, but when I play the program at full speed, the DMA interrupt flags are cleared by the time the program hits the main loop, after initalization, and they never are set again. Any ideas what is going on? I have already checked all the Interrupt Enable registers and the EBSR and they all are showing the values they should. Code runs normaly at normal speed without the GPIO code.

over 13 years ago

0 Timothy Sapio over 13 years ago

Intellectual 310 points

Workaround: I initalized the GPIO before the I2S. Still not sure what the root cause of this problem is.

0 Timothy Sapio over 13 years ago in reply to Timothy Sapio

Intellectual 310 points

Ok, looks like I found the issue. It has to do with IVPD and IVPH registers. Since I am merging two pieces of code together, and the two different ISR's are in two different object files, when one updates these registers to notify the IRQ handler where the ISR's are stored, it looses track of the other one. Trying to determine how to fix this now without rewriting everything... -_-

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Interrupt Driven Program does not work at full speed.