Disable/Enable DT interrupt

[keithdoxey]

You can use the macro's
@ INT_ENABLE TMR1_INT
@ INT_DISABLE TMR1_INT

I have a chunk of time critical bit banging code for driving WS2811 LEDs so I cant allow it to be interupted.

If I do the following.....

@ INT_DISABLE    TMR1_INT
{whole chunk of time critical code}
@ INT_ENABLE    TMR1_INT

Would TMR1 be able to flag an interrupt that would then be picked up when I re-enabled the DT Interrupt or would I miss that event completely ?

Thanks in advance.

Keith

[tumbleweed]

In general yes, but that depends on the version of DT-INTS you're using. Some of the ones I've seen clear the IF bit in INT_ENABLE, others don't.

Might be easier to just set/clear the TMR1IE bit yourself (It's normally bit 0 of PIE1). If the TMR1IF bit is set when you set TMR1IE it'll generate an interrupt.

[Dave]

Keith, I did the exact same thing when I wrote code some years ago for the WS2811 LEDs. That is the reason I switched to using the APA102C led's as they are SPI based and there is no need to disable the interrupts. In fact I just finished a table lamp for my daughter using 204, APA102C's and 29, 5.25 inch hard disk platters.

[keithdoxey]

Thanks Tumbleweed, will do some experimenting when I get home.

Love the lamp Dave. Looks really cool.

I am using WS2801, WS2811, APA102 and some PL9823 LEDs in a project. Will post pictures once its complete.