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regarding ADC


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anjel

Wed Aug 20 2008, 10:00PM

Registered Member #9904

Joined: Mon Aug 18 2008, 12:18AM

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hey cud you tell me what is the output of of ADC in terms of? Like as binary data or wt? Hw does controller recognize it? In my application i have to compare the output data of ADC with a reference value so m confused like will MC recognize data as HEX no or BINARY data.................or wt??

sashijoseph

Wed Aug 20 2008, 10:23PM

Registered Member #5870

Joined: Mon Feb 04 2008, 06:26PM

Posts: 649
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The ADC's output is a binary representation of the input signal.
For eg if you have a 8-bit parallel adc configured for an input analog range of 0 to 5v,then for an input voltage of 0v you'll get as 00000000(00h) the binary value at the data pins.For 5v input you'll get 11111111 (0FFh).
So just read in the binary data into a variable and compare it directly with your reference hex value.
for eg if the data pins are connected to port P1...
ADCval = P1;
if (REFval == ADCval)
{....
}

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Ajay | 08 Jan : 12:18

thats ok.. i replied to your post. do check it

AbhinavChaurey | 08 Jan : 12:17

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well there is no limit, but its better to stick to single thread till your problem is different. Like now you have posted in a new thread whereas it could be done in the previous thread only.

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i have postaed a new thread. one more thing yaar smily is not showing in my msgs .so sad

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