dds.h

8051控制的DDS信号发生器AD8950（KEIL C）

#define  uchar unsigned char
#define  uint  unsigned int
#define  ulong unsigned long

#define  FALSE	0
#define  TRUE	1

//三个位操作宏
#define SET_BIT(x,y)	(x|=(1<<y))	//置x中的第y位为1#define uchar unsigned char
#define CLR_BIT(x,y)	(x&=~(1<<y))	//清x中的第y位为0#define uint unsigned int
#define GET_BIT(x,y)	(x&(1<<y))	//读取x中的第y位

#define DDS_CLK_IN			80000000L
#define MAX_INPUT_NUMBERS	8
#define MAX_FREQ			40000000L

#define KEY_NULL	0xff
#define KEY_LEFT		0x38
#define KEY_RIGHT		0x34
#define KEY_UP			0x2c
#define KEY_DOWN		0x1c

#define DDS_CLK		P1_7
#define DDS_UPDATE		P1_6
#define DDS_DATA		P1_5
#define DDS_RESET		P1_4

#define DISP_DATA		P1_2
#define DISP_CLK		P1_1
#define DISP_LOAD		P1_3