Hi...

for acquiring 4 analog inputs of PIC18F4550 am using a condition like(if i give 1 & 2 as input channel 1 and channel 2 value should get displayed)
where 1 starting channel number and 2 end of channel number
I tried this using for loop but am not getting any proper values...

correct me whether am correct...
awaiting for ur replies...

thanks,

 

You might want to post your code, as I cant make any sense of what you have said in regard to the conditions you placed.

Remember to use the [C0DE] and [/C0DE] tags to surround your code when posting it.
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Hi,
Here's what I would do in mikroBASIC. You can get the idea from here and convert to your own code.

sub procedure ScanADCs(dim StartChannel as byte, dim ChannelNum as byte)
       for Temp = 0 to 7
           ADVal[Temp] = 0
       next Temp
       
       for Temp = StartChannel to ChannelNum
           ADVal[Temp] = ADC_Read(Temp)
       next Temp

       Ch0 = ADVal[0]
       Ch1 = ADVal[1]
       Ch2 = ADVal[2]
       Ch3 = ADVal[3]
       Ch4 = ADVal[4]
       Ch5 = ADVal[5]
       Ch6 = ADVal[6]
       Ch7 = ADVal[7]

end sub

Call the subroutine like

ScanADCs(0,2)

Hope this helps.
Tahmid.

 

thanks for your replies retched and Tahmid...

here is my code...

void Get_Start_End(unsigned char a,unsigned char b)
{
int l,m,temp5;
char a_buffer[3],c2[3][3],x;
for(x = a, l=0; x<=a+b-1; x++,l++)
 {
   x = x & 0x07;
   ADCON0bits.CHS0 = (x & 0b00000001);
   ADCON0bits.CHS1 = ((x & 0b00000010)>>1);
   ADCON0bits.CHS2 = ((x & 0b00000100)>>2);

  ADCON0bits.GO = 1;
  while(ADCON0bits.NOT_DONE);
   
  temp5 = ReadADC();
  itoa(temp5/2,a_buffer);
    for(m=0; m<3; m++){
      c2[l][m] = a_buffer[m];
    }
  }

putsUSBUSART(c2);
    
}