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adc in 18f1320

 
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alfonsol
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adc in 18f1320
PostPosted: Sat Jan 21, 2006 3:30 pm     Reply with quote

i'm trying to use the adc of the 18f1320, but i just get zeroes., anyone can help me?

// Funciones
adquirir()
{



set_adc_channel( 0 );
volt = Read_ADC();

set_adc_channel( 4 );
amp = Read_ADC();

set_adc_channel( 3 );
Vbat = Read_ADC();

set_adc_channel( 2 );
Ibat = Read_ADC();

return 0;
kender



Joined: 09 Aug 2004
Posts: 768
Location: Silicon Valley

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PostPosted: Sat Jan 21, 2006 4:24 pm     Reply with quote

You need to call setup_adc_ports(...) and setup_adc(...) before set_adc_channel(...). You also should add a delay of about 15uS after each call to set_adc_channel(...), that way the voltage will stabilize before you actually read the ADC value.
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