keys.h

/*
Author: 	W Pielage & E Helmond
Date:		13-9-2013
Revision:	2

    keys.c:
          Keyboard-driver for SpARM-board v1

    pin-info:
           PD1  - R2
           PD2  - R3
           PD3  - R4
           PD6  - K1
           PD7  - K2
           PD8  - K3
           PD9  - K4
           PD11 - R1

To use the keyboard first initialize the ports:
	KEYS_init();
After that, you can use polling to read a key with:
	KEYS_read();
*/

/****************Libraries******************************/
/* Libraries needed for Keys are (These are in main.h):
 * #include "stm32f4xx.h"
 * #include "stm32f4xx_gpio.h"
 * #include "stm32f4xx_syscfg.h"
 */

/****************Defines********************************/
#define	KEY_R1			GPIO_Pin_11
#define	KEY_R2			GPIO_Pin_1
#define	KEY_R3			GPIO_Pin_2
#define	KEY_R4			GPIO_Pin_3
#define	KEY_ROW			(KEY_R1 | KEY_R2 | KEY_R3 | KEY_R4)
#define PKEY_ROW		GPIOD
#define	KEY_K1			GPIO_Pin_6
#define	KEY_K2			GPIO_Pin_7
#define	KEY_K3			GPIO_Pin_8
#define	KEY_K4			GPIO_Pin_9
#define	KEY_COL			(KEY_K1 | KEY_K2 | KEY_K3 | KEY_K4)
#define	PKEY_COL		GPIOD

/****************Function Prototypes********************/
unsigned int 	KEYS_kolom	(void);
unsigned int 	KEYS_read	(void);
void 			KEYS_init	(void);