Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Interrupt Not Enable

Dear Friends, I am trying to use interrupt on Altera DE2_115 board. but it is not working. i am taking LOAD pulse as an interrupt and at every interrupt taking data from external bus "DATA...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

125kHz is quite high for an interrupt, if your CPU is running at 100MHz that's only 800 cycles between two IRQs. My guess too is that the CPU is too slow to process it. From the regularity of the 'holes' in your last picture I'd say it is busy processing the system timer interrupt and that's why it doesn't process yours.

If you need to process data coming at that speed I'd strongly advise to use some specialized hardware to do that, such as a DMA.