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binary to decimal conversion

 
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PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Mar 21, 2010 4:08 pm     Reply with quote
Here is a demo program that shows how to display the decimal ADC
result on an LCD. The ADC value will go from 0 to 1023 as you turn
the trimpot knob.
Code:

#include <16F877.H>
#device adc=10
#fuses XT, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=4000000)

#include "flex_lcd.c"

//============================
void main()
{
int16 adc_value;
 
lcd_init();

setup_adc_ports(AN0);
setup_adc(ADC_CLOCK_DIV_8);
set_adc_channel(0);
delay_us(20);

while(1)
  {
   adc_value = read_adc();
   printf(lcd_putc, "\f%4lu", adc_value);
   delay_ms(500);
  }
} 
giopic



Joined: 26 Aug 2009
Posts: 4
Location: Padova - Italy

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PostPosted: Mon Mar 22, 2010 11:12 am     Reply with quote
Thank you very much.
I used it and it works.
I tried to modify it to obtain the voltage too. For this I need to multiply "adc_value" by 5 and divide the result by 1023 and show the result using comma (or point) as decimal separator. But I get only one number (1 to 4). Probably because "int16 adc_value" ?

Can you explain me how I can do it ?

Where can I find manual to learn how to use C language in CCS ?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Mar 22, 2010 11:26 am     Reply with quote
This post shows how to convert the ADC value to volts and display it:
http://www.ccsinfo.com/forum/viewtopic.php?t=32168&start=1
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