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12F1840 & Touchpad Library

 
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longos



Joined: 27 Mar 2012
Posts: 4

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12F1840 & Touchpad Library
PostPosted: Tue Mar 27, 2012 4:47 am     Reply with quote
I try to use TOUCHPAD library with 12F1840. When I use only PIN_A2 all is OK, but when I declare
#USE TOUCHPAD(RANGE=H, THRESHOLD=6, SCANTIME=32, PIN_A2='A', PIN_A4='B')
Touch buttons doesn't works. Compiler 4.130. Source code:
Code:

#include <12LF1840.h>
#include <regPIC12LF1840.h>

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES INTRC_IO                 //Internal RC Osc, no CLKOUT
#FUSES WDT_SW                   //No Watch Dog Timer, enabled in Software
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(clock=16000000)

#use FIXED_IO( A_outputs=PIN_A0)
#define LED   PIN_A0

#USE TOUCHPAD(RANGE=H, THRESHOLD=15, SCANTIME=32, PIN_A2='B')
//#USE TOUCHPAD(RANGE=H, THRESHOLD=6, SCANTIME=32, PIN_A2='B', PIN_A4='A')

char c;

void main(void){
   setup_oscillator(OSC_16MHZ|OSC_NORMAL|OSC_PLL_OFF,0);

   enable_interrupts(GLOBAL);
   touchpad_state(1);

   while(1){
       c = TOUCHPAD_GETC();
   
      if(c == 'B' || c=='A'){
         c=0;
         output_toggle(LED);
         output_toggle(PIN_A4);
         delay_ms(100);
      }
   }
   
}

I think there's some bug in CCS library. Some ideas ?
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Mar 27, 2012 1:22 pm     Reply with quote
Quote:

//#USE TOUCHPAD(RANGE=H, THRESHOLD=6, SCANTIME=32, PIN_A2='B', PIN_A4='A')


void main(void){

if(c == 'B' || c=='A'){
c=0;
output_toggle(LED);
output_toggle(PIN_A4);
delay_ms(100);
}
}

}

You are toggling Pin A4. That's the same pin that you assigned as
a Touchpad input. Don't toggle a pin that is used for the touchpad.
Don't do anything to it. It's controlled by the Touchpad library code.
longos



Joined: 27 Mar 2012
Posts: 4

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PostPosted: Wed Mar 28, 2012 3:55 am     Reply with quote
PCM programmer wrote:
Quote:

//#USE TOUCHPAD(RANGE=H, THRESHOLD=6, SCANTIME=32, PIN_A2='B', PIN_A4='A')

You are toggling Pin A4.
This line is in comment. I use only PIN_A2.
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