S12 / MagniV MicrocontrollersのトピックRe: XGATE does not start

XGATE does not start

alturc — Wed, 08 Dec 2010 00:44:08 GMT

Hi everyone,

I'm new to MCU programming and I can't get my XGATE to service my PIT interrupts although I get them to work on my CPU12.

I'm using mc9s12XEP10CAL chip, and CodeWarrior 5.9.0 build 2836.

I configured the XGATE as described in some APP notes (AN3144, and AN2685). but i still don't get any results.

Is there any special configuration to get the XGATE to start ?

Thank you.

Ali.

Re: XGATE does not start

kef — Wed, 08 Dec 2010 01:35:37 GMT

Did you use new project wizard and told there you are going to use XGATE? If so, then XGATE should execute at least dummy SoftwareTrigger0_Handler() from xgate.cxgate. Doesn't it run?

If it runs, then you should do following:

1) You should either add XGSWT = 0x100; to SoftwareTrigger0_Handler(), or remove XGSWT= 0x0101; from SetupXATE() in main.c. This is to prevent software thread 0 executing again and again, taking all XGATE time.

2) add PIT handler to *.cxgate file

3) edit XGATE vectors table to point to PIT handler

4) route PIT interrupt to XGATE. Add this to SetupXGATE:

ROUTE_INTERRUPT(Vpit0, 0x81); // route PIT0 to XGATE

Now, if PIT is setup properly, XGATE shoud handle PIT interrupts

Re: XGATE does not start

alturc — Wed, 08 Dec 2010 02:31:49 GMT

Thanks, it works perfectly.

Ali.