KPD.c File Reference

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Detailed Description

Atmel Corporation

• File : main.c
• Compiler : IAR EWAVR 4.11A

• Support mail : avr@atmel.com

• Supported devices : This example is written for the ATtiny24.

• AppNote : AVR245: Code Lock with LCD.
• Related AppNote : Based on AVR155.

• Description : Driver for 4x4 keypad matrix

Revision

1.3

Date

Monday, October 10, 2005 13:23:34 UTC

Definition in file KPD.c.

#include "KPD.h"

Include dependency graph for KPD.c:

Go to the source code of this file.

Functions
unsigned char	KPD_GetKey (void)
void	KPD_Init (void)
__interrupt void	PCINT1_ISR (void)
__interrupt void	TC0_ISR (void)
Variables
unsigned char	KPD_KeyDown
unsigned char	KPD_KeyPressed
unsigned char	KPD_LastKey
unsigned char	KPD_ScanRow

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Function Documentation

unsigned char KPD_GetKey (  void   )

Definition at line 83 of file KPD.c. References KPD_KeyPressed, and KPD_LastKey. Referenced by main().

void KPD_Init (  void   )

Definition at line 32 of file KPD.c. References KPD_KeyDown, KPD_KeyPressed, KPD_LastKey, and KPD_ScanRow. Referenced by CheckAccess(), and Initialise().

__interrupt void PCINT1_ISR (  void   )

Definition at line 96 of file KPD.c. References KPD_KeyDown, KPD_KeyPressed, KPD_LastKey, and KPD_ScanRow.

__interrupt void TC0_ISR (  void   )

Definition at line 143 of file KPD.c. References KPD_KeyDown, and KPD_ScanRow.

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Variable Documentation

unsigned char KPD_KeyDown

Definition at line 28 of file KPD.c. Referenced by KPD_Init(), PCINT1_ISR(), and TC0_ISR().

unsigned char KPD_KeyPressed

Definition at line 25 of file KPD.c. Referenced by KPD_GetKey(), KPD_Init(), main(), and PCINT1_ISR().

unsigned char KPD_LastKey

Definition at line 26 of file KPD.c. Referenced by KPD_GetKey(), KPD_Init(), and PCINT1_ISR().

unsigned char KPD_ScanRow

Definition at line 27 of file KPD.c. Referenced by KPD_Init(), PCINT1_ISR(), and TC0_ISR().

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