how to use ADC channels simultaneously in pic16f877a

[summerof69.kunal]

hi..i want to use 3 adc channels simultaneously in pic16f877A..for one channel it is
set_adc_channel(1);
delay_ms(1000);
x=read_adc();

what would b the ccs coding if i want to use 3 channels simultaneously...plz send me the coding

 

[cool.man]

Write your code like that

set_adc_channel(0);
delay_ms(10);
value1=read_adc();
  
set_adc_channel(1);
delay_ms(10);
value2=read_adc();

set_adc_channel(2);
delay_ms(10);
value3=read_adc();

 

[betwixt]

There is only one ADC in the 16F877A so you can't take simultaneous measurements.

I don't use CCS but I would guess the best you could do is rotate channel numbers in the set_adc_channel() instruction.

Brian.

 

[karesz]

Hi,
I dont know ccs coding, but you can sample the 3 channels (external) at same time and read it out sequentially into your PIC...
K.