Hi all,

I'm trying to replace a "send one byte at a time" PIC32 routine into
an interrupt driven one, so that the sending gets into the background.

I have a weird problem though, it seems like I didn't clear the TX Int
status flag, although I do. In other words, even if I don't send any
byte yet, the UART2 vector will be called (with the U2TX status flag
set), but I didn't send any byte yet and I cleared the Int status flag
before enabling the (multivectored, by the way) interrupts!!

I do clear the flag in the interrupt routine (but the debugger doesn't
show any IFS1 register update, like if it was write-protected!!!),
however after the ERET instruction, the CPU immediately executes the
vector again, which is pretty easy to guess as the status flag doesn't
want to get cleared! (neither if I write the register, or use the CLR
version of it).

I've read the datasheet and Family Reference a couple of times already,
I don't think I'm doing anything wrong, it even looks pretty clear and
simple to me what to do, but yet I'm stuck on this problem, which appears
like the interrupt status flags U2TX U2RX and U2E are always stuck at
"1" if the module is ON, and I can't clear them.

Any idea?

With kind regards,
Mario

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.