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codewrecker2
Joined: 23 Dec 2005
Posts: 23
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| Alternative to CCP module |
 Posted: Tue Nov 21, 2006 10:44 pm |
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Hello,i wud like to know whats the best possible alternative to using a CCP module.I so badly miss it in my PIC 16F689,as pointed out by PCM PR.....(sorry 2 bother ,dude)
what i need to do is send data over 3 data lines and use a clock (10KHz),which should fall for each high on a data line. how can i have that much control on the clock n how easy is that or is it?
thanx in anticipation |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Tue Nov 21, 2006 11:00 pm |
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| Quote: |
what i need to do is send data over 3 data lines and use a clock
(10KHz),which should fall for each high on a data line. |
Are you trying to do SPI ? That would have a data-in and a data-out
line, and a chip select and a clock. You could use the SSP module for that.
Tell us what chip you are trying to talk to. |
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codewrecker2
Joined: 23 Dec 2005
Posts: 23
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| Posted: Wed Nov 22, 2006 1:19 am |
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| Thanx but SSP aint gonna work for me, i believe.The pic16F689 is being interfaced to motorola 68HC11.The pic has 30 bits to be sent to 68H... which have to be sent on 3 data lines in exactly 10 clock pulses (sadly,this is a compulsion ,so as to keep compatibility with older interfaces). The motorola is on capture mode and interrupts on rising/falling edge of clock till it receives its 10 clocks of data.could be possible to use the a clock of SSP((timer2 o/p)/2) to get my 10 KHz clock and use general purpose port pins to o/p data? |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed Nov 22, 2006 2:08 am |
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| I think you'll have to bit-bang the clock and the data. |
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