CUP IFR register not updated automatically

Jingzhe Wu

Hi,

I am using a F28027 Piccolo Launchpad. I am now trying to debug the program in realtime mode to test the ISR function. I enabled the realtime mode and manually set the corresponding DBGIER register bit to enable desired CUP interrupt. I then moniter the CPU IER and IFR registers. I found that the IFR register cannot be set automatically, I have to set bit manually to interrupt and call ISR function. Everytime I manually set IFR register, the counter IsrTicker increases.

Is it possible to update the IFR value automatically?

Thanks.

Jingzhe

over 12 years ago

0 Jingzhe Wu over 12 years ago

Intellectual 720 points

I found out that the reason is that the PIEIFR and PIEACK bits are unable to update automatically. Therefore the interrupt cannot be sent to CPU. How are PIEIFR and PIEACK bits triggered? Do I have to do it manually?

Jingzhe

0 Jingzhe Wu over 12 years ago in reply to Jingzhe Wu

Intellectual 720 points

Problem Solved. Turns out I forgot to reset PIEACK at the end of each ISR.

Jingzhe

C2000™︎ microcontrollers

C2000 microcontrollers forum

CUP IFR register not updated automatically