kbruin79
Joined: 02 Aug 2010
Posts: 30
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| Capsense issues with Pic16f1939 |
 Posted: Tue Mar 27, 2012 4:05 pm |
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Hello,
Ever since I migrated from the Pic16f727 to the Pic16f1939 I started having problems with the capsense sensitivity. The capsense module won't detect a finger press with an overlay anymore. It seems it's much less sensitive and even if I push the scan time to the max the module won't detect any finger press.
Here is the code and like I said it worked fine with the Pic16f727
Compiler version 4.128. Any idea how to resolve the sensitivity issue is appreciated. Thank you
| Code: |
#include <16F1939.h>
#fuses INTRC_IO, NOWDT, NOPROTECT, NOMCLR,VCAP_A6
#use delay(clock = 8000000)
#include "flex_lcd.c"
// use the manual way for assigning IO pins
#use fast_io (C)
//CAP1 CAP2 CAP4 CAP10 CAP9
#use touchpad(scantime=67ms threshold=3,PIN_D1='5',PIN_D2='4',PIN_D0='3',PIN_D4='2',PIN_D3='1')
//PIN_D1='1',PIN_D2='2',PIN_D5='3',PIN_D0='4',PIN_D4='5'
//------------------------------
//gloable variable declaration
//------------------------------
char c='0';
char previous_sensor_id=0;
char current_sensor_id;
char user_selection;
int8 scroller=0;
int8 display_delay=8;
//---------------------------------------------------
//function prototypes:
//---------------------------------------------------
int8 scroll_wheel_value(void);
void make_LCD_pins_digital(void);
void main(void)
{
make_LCD_pins_digital();
lcd_init();
lcd_putc("\fTime \n");
lcd_putc(" Calibrating ");
delay_ms(200);
enable_interrupts(GLOBAL);
//calibrates, then enters normal state
TOUCHPAD_STATE(1);
do
{
scroll_wheel_value();
switch (c)
{
//start time lapse;
case '5':
printf(lcd_putc,"\f%c%s",126,"Start TM ");
lcd_putc("\n Set Time Date");
user_selection='5';
delay_ms(display_delay);
//IR OUT
//GPIOD_5=1;
//delay_ms(10);
break;
case '1' :
lcd_putc("\f Start ");
printf(lcd_putc,"\n%c%s",126,"Set Time Date");
user_selection='1';
delay_ms(display_delay);
break;
case '2':
lcd_putc("\f Set Time Date");
printf(lcd_putc,"\n%c%s",126,"expo");
user_selection='2';
delay_ms(display_delay);
break;
case '3':
lcd_putc("\f exposure");
printf(lcd_putc,"\n%c%s",126,"Trigger");
//printf(lcd_putc,"\n%c%s",126,"Motion
user_selection='3';
delay_ms(display_delay);
break;
case '4':
lcd_putc("\f Trigger");
//lcd_putc("\f lapse");
printf(lcd_putc,"\n%c%s",126,"Setting");
user_selection='4';
delay_ms(display_delay);
break;
}
}while(1);
}
int8 scroll_wheel_value(void)
{
if(touchpad_hit())
{
c=touchpad_getc();
//lcd_putc("\ftouchpad pressed");
current_sensor_id=c;
if (current_sensor_id > previous_sensor_id)
{
if ((current_sensor_id=='5')&&(previous_sensor_id=='1'))
{
--scroller;
}
else
{
++scroller;
}
}
else if ((current_sensor_id < previous_sensor_id))
{
if ((current_sensor_id=='1')&&(previous_sensor_id=='5'))
{
++scroller;
}
else
{
--scroller;
}
}
previous_sensor_id=c;
}
else
{
//c='0';
return(scroller);
}
return(scroller);
}
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