Re: [U-Boot-Users] How to add Timer Interrupt to u-boot?

Robert wrote:

Hello all:

Everybody knows how to add Timer Interrupt to the u-boot?

I wrote a fuction called timer0_isr(), and wanted to add it to Uboot, but I didn't know what to do, Does the uboot has a funciton like function request_irq() in linux kernel? Thanks in advance!

With kind regards,

Robert Xia

Hi Robert,

Interrupts are not used by u-boot (with some rare exceptions). Generally things poll and there is usually some type of counter register (processor or board-specific) for measuring elapsed time.

If you really need interrupts, you will probably have to set up the vectors, interrupt registers, etc. yourself.

Best regards, gvb