ISR

Valdis Ivanov

Other Parts Discussed in Thread: TMS320F28027

Hi all ! I use tms320F28027 MCU and XDS100 emulator. Interrupt service routine in my code is calling normally, when I loaded my project in the RAM for debugging. But when

I had loaded my project in the Flash, main program is executing, but interrupts is not processing. What is reason?

Thanks in advance !

over 14 years ago

0 Ahmed Shakeel over 14 years ago

Intellectual 410 points

I think you can check flash wait states that you are setting when you are flashing your code to flash, if wait states are not proper they will make your system very slow and you will not be able to service your routine in right time.

Shakeel

0 Tim King61612 over 14 years ago in reply to Ahmed Shakeel

Expert 2355 points

ISRs are usually the fastest code which you want to run with very little latency. For that reason it is usually recommended that you run them from RAM after copying them from Flash. This will allow you to make the most of your DSP.

Tim

0 Valdis Ivanov over 14 years ago in reply to Tim King61612

Prodigy 140 points

Hi. Thank you for your answer. I understand that ISR is fastest code, which needed place in the RAM. But i don`t know how do it. If i shall place ISR in the Flash, how decrease wait states for access to it?

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