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Help! Code in Timer int now working?

 
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jaikumar



Joined: 15 Dec 2006
Posts: 109

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Help! Code in Timer int now working?
PostPosted: Thu Jan 08, 2009 7:22 am     Reply with quote
Why is this not working?

Code:

#INT_TIMER1                       
void clock_isr()
{               
if (pcComm == 0x00)
{
 if ((dataCount == 22) && (RcvData[18] == 0x39)) Status = 'F';
 else if ((dataCount == 20) && (RcvData[18] == 0x3a)) Status = 'N';
 else if ((dataCount == 13) && (RcvData[11] == 0x33)) Status = 'T';
}
if ((PcComm == 0x01) && (dataCount == 20) && (RcvData[18] == 0x31)) printf(usb_cdc_putc, "Ok.");

}

#INT_RDA
void rda_isr()
{
 disable_interrupts (INT_TIMER1);
 RcvData[dataCount++] = getchar();
 enable_interrupts (INT_TIMER1);
}



Actually it works if i either have this code

if (pcComm == 0x00)
{
if ((dataCount == 22) && (RcvData[18] == 0x39)) Status = 'F';
else if ((dataCount == 20) && (RcvData[18] == 0x3a)) Status = 'N';
else if ((dataCount == 13) && (RcvData[11] == 0x33)) Status = 'T';
}

or
this code
if ((PcComm == 0x01) && (dataCount == 20) && (RcvData[18] == 0x31)) printf(usb_cdc_putc, "Ok.");

but if i have both of them as shown above it does not work. ANY IDEAS?

Thanks and Regards,
Jai
dyeatman



Joined: 06 Sep 2003
Posts: 1924
Location: Norman, OK

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PostPosted: Thu Jan 08, 2009 7:44 am     Reply with quote
When you ask a question please be clear. What do you mean by "not working"?

Without knowing your answer I can already see a potential problem where you trying to PRINTF inside the timer routine. DOZENS of times we have said here to get out of an interrupt as quickly as possble. While in the interrupt routine do not transmit or print anything. It is even advised to avoid floatng point.

Why are you disablng the Timer interrupt in INT_RDA? If a Timer interrupt comes in during INT_RDA it won't be serviced until INT_RDA is completed.
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