types.h

这是《Keil Cx51 V7.0单片机高级语言编程与uVision2应用实践》教材各章中列出的全部程序例子。

typedef unsigned char uchar;
typedef unsigned int uint ;

uchar help();
uchar inport( uchar idata *buf );
uchar outport( uchar idata *buf );
uchar command( uchar idata *buf );

#define XTAL	20e6
#define BAUD	9600
#define SMOD_ 	0x80
#define	RXD_	0x01
#define	TXD_	0x02
#define TI_		0x02
#define REN_ 	0x10
#define	SM1_	0x40
#define T1_M1_	0x20