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ADC 12bits

 
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pilar



Joined: 30 Jan 2008
Posts: 197

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ADC 12bits
PostPosted: Mon Oct 19, 2009 9:33 am     Reply with quote
Hi, I'm trying to use the 12-bit ADC of 18F4458, the result I want to put in two registers, as I do to separate the ADC result into two bytes?

Code:
#include <18F4458.h>
#device adc=12
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

#byte ADRESL = 0xFC3
#byte ADRESH = 0xFC4

//=================================
void main()
{
int16 value;
int8 Buffer_ADC[2];

setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_32);
set_adc_channel(0);
delay_us(15);

while(1)
  { 
   value = read_adc();                         
   Buffer_ADC[0] = valueL??;      // MSB                 
   Buffer_ADC[1] = valueH??;      // LSB
 
    //printf("%lu \n\r", value);
    delay_ms(500);
  }
}
drh



Joined: 12 Jul 2004
Posts: 192
Location: Hemet, California USA

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PostPosted: Mon Oct 19, 2009 9:38 am     Reply with quote
Code:

Buffer_ADC[0] = make8(value, 0);
Buffer_ADC[1] = make8(value, 1);

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David
pilar



Joined: 30 Jan 2008
Posts: 197

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PostPosted: Tue Oct 20, 2009 7:31 am     Reply with quote
Thank you..
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