Programming 89c51 Using Keil C

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Ejaz484 Commentator Join Date: Sep 2010 Posts: 67	Programming 89c51 Using Keil C 06/07/2011 9:08 AM
	Hi, I need to convert the serial 12 bit data into parallel 12 bit using the 89c51 IC. presently iam using p3.0(RXD pin) as input pin, i.e, iam giving my 12bit serial data to pin p3.0 and have to convert it into parallel data using 89c51... Can anyone give me suggestion how can i do it please... Thanks...
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#1 Re: Need help in programming for 89c51 using keil C 06/07/2011 9:26 AM
	Is it asynchronous (like e.g. RS232) or is there a clock or data strobe signal? __________________ "Love justice, you who rule the world" - Dante Alighieri
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Ejaz484 Commentator Join Date: Sep 2010 Posts: 67	#2 In reply to #1 Re: Need help in programming for 89c51 using keil C 06/07/2011 9:34 AM
	Actually i get that 12 bit serial data from the MAX187 IC(ADC)...
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#3 In reply to #2 Re: Need help in programming for 89c51 using keil C 06/07/2011 10:44 AM
	Where exactly is your problem? __________________ "Love justice, you who rule the world" - Dante Alighieri
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Ejaz484 Commentator Join Date: Sep 2010 Posts: 67	#4 In reply to #3 Re: Need help in programming for 89c51 using keil C 06/07/2011 10:52 AM
	In converting that serial 12bit data in parallel...
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#5 In reply to #4 Re: Need help in programming for 89c51 using keil C 06/07/2011 11:29 AM
	Assuming the data comes MSB first: Clear result Do whatever the MAX187 datasheet tells you to do to prepare for data transfer Do whatever the MAX187 datasheet tells you to do to the SCLK to read a databit result = result x 2 If databit = 1, add 1 to result Repeat from 3 until you've read all 12 data bits. In C, it's probably more elegant to use shift and or at steps 4 and 5, tho' it comes to the same thing. __________________ "Love justice, you who rule the world" - Dante Alighieri
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Ejaz484 Commentator Join Date: Sep 2010 Posts: 67	#6 In reply to #5 Re: Need help in programming for 89c51 using keil C 06/07/2011 11:35 AM
	Iam getting serial output data from MAX187 correctly. But i have to convert this serial data into parallel data...
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#7 In reply to #6 Re: Need help in programming for 89c51 using keil C 06/07/2011 11:43 AM
	Just code up the steps I gave you into C. It describes the algorithm for serial to parallel conversion. __________________ "Love justice, you who rule the world" - Dante Alighieri
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