addr.c

来自「dsp tmslf2407a 汇编,c的原代码,包括i2c,scitimer,f」· C语言 代码 · 共 17 行

#include "typedef.h"       
#include "f2407regs_c.h"  

uchar readAddr(void);

/*	
	读取硬件地址，低四位有效
	iopb0~iopb3
*/
uchar readAddr( )
{
	uchar addr;
	MCRA &= 0xf0ff;		//configure iopb0,iopb1,iopb2,iopb3 as io port
	PBDATDIR &= 0xf0f0;	//configure iopb0,iopb1,iopb2,iopb3 as input,default is low
	addr = PBDATDIR&0x000f;
	return (addr);
}