Software Debounce in C code

1. PhoneCalculator.com Search for the best long distance, calling card, phone card

2. CogniDial DialAround: 7.8¢ US (48 states), Post-Paid, billed via credit card. No monthly fee
Cheap phone rates: Australia 8.9¢, Canada 8.3¢, Denmark 9.6¢, France 10.2¢, Germany 8.5¢,
Hong Kong 8.9¢, Italy 10.9¢, Japan 10.9¢, Maylasia 16.5¢, Mexico 21.1¢, Russia 26¢,
Singapore 13.4¢, Taiwan 13.4¢, Thailand 32.8¢, United Kingdom 6.8¢, US 7.8¢
Accessed via a toll FREE 800 number, No Switching, Post-Paid.

3. PowerNet Global 4.5¢/minute 48 states. $2.5 fee waived if usage > $15/month.
No PICC fee for first line. Vietnam 90¢

4. Unitel 1+ service 4.9¢/minute 48 states. Direct Billing. No fee if $15 minimum usage.
Commercial, Residential service. Low International & Intrastate rates.
If usage is less than $15, then a $2 billing fee is added; No billing if no usage.

5. Planet Earth 1+ service 6.9¢/minute 48 states. $10 monthly Minimum usage. View bills online.
or use Planet Earth 1+ service 7.9¢/minute 48 states. No fees (except taxes), No Minimums.
6 seconds billing for intrastate & international calls (1 minute minimum). Interstate is 1 minute billing. Credit card billing. Statements on-line.
Commercial/Residential. Cheap Intrastate Rates. Lowest long distance: Australia 15.3¢, Canada 11.8¢, Germany 13.4¢,
Hong Kong 26.2, Italy 20.1¢, Japan 20.9¢, Mexico 21.5¢, Taiwan 39.6¢

byte xdata RAW_IO_ADDRESS _at_ 0x7FF0
unsigned char reentrant Debounce_Key(void) {
  unsigned char i, key_debounced;
  /********************************************************/
  /* Software Debounce code in C                          */
  /* Debounce keys (20 to 100 milliseconds) from the IO   */
  /* If we are using a 25 Mhz 8051, then 20 loops would be*/
  /* about 30 milliseconds). Key debounce software.       */
  /********************************************************/
  key_debounced = RAW_IO_ADDRESS;
  
  for (i=0; i<20; i++) {

    key_debounced = key_debounced & RAW_IO_ADDRESS;
  }
   


  return(Key_Debounced);
}







_ _









| Best 1+ Long Distance
 | International Overseas Callback
 | International Calling |

 | Calling Card Comparison 
 | Cellular PCS 
 | Internet Service Provider 
| Satellite TV
| Pagers |
|  DSL | Voice over IP calling
| Home Security with FREE hardware 
| Cheap PC Computers | 
 | Dial-Around | Toll FREE | Conference Calling | Canada Long Distance |

| Best Rate Long Distance Calculator: Compare Intrastate, Interstate, International calling rates |


| About A1 Internet Telecom
 | Frequently Asked Questions|

|www.a1internettelecom.com | www.a1internettelecom.net|
| www.phonemacro.com |
 www.phonecalculator.com |





 




_
_
_
_
_
_
_
_
_
_
_
_
_
_ 
_ 
_ 
_
_
_
_
_ 
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_ ____
              
                   

Ink Refills______