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multi A/D readings

 
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PICnewbie



Joined: 12 Mar 2010
Posts: 2

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multi A/D readings
PostPosted: Fri Mar 12, 2010 12:04 pm     Reply with quote
Hello,
I am very new to PIC microcontroller and very little knowledge.
I am trying to read 2 analog sources (potentiometer and proximity sensor) and convert them to digital values.
All the samples I found are reading from one source.
Could someone point me to the right direction and help me understand how it works.

For example: (say I want to read from A0 and A1 inputs, how do I get two readings?)
Code:
setup_adc(ALL_ANALOG); //sets porta toall analog inputs
set_adc_channel(1); //points a/d at channel 1
delay_ms(5000); //waits 5 seconds
value = read_adc(); //reads value

Thanks in advance,
Kevin
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Fri Mar 12, 2010 12:17 pm     Reply with quote
Set the channel. Wait for a short delay (not 5 seconds). Then read
the A/D value into a variable. Example:
Code:

set_adc_channel(0);
delay_us(20);
result_0 = read_adc();

set_adc_channel(1);
delay_us(20);
result_1 = read_adc();
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