example4.c

arm开发的一些小实验,开发工具ads1.2,multi-ice,实验开发板 s3c2410

//对0x30100000地址处，分别作字长、半字、字节的读、写
int main(void)
{
	unsigned long *ptr =(unsigned long*)0x30100000;
	unsigned short *ptrh=(unsigned short*)0x30100000;
	unsigned char *ptrb=(unsigned char*)0x30100000;

	unsigned char tmpb;
	unsigned short tmph;
	unsigned long tmpw;

	*ptr=0x12345678;

	tmpw=*ptr;    		//字长读
	*ptr=tmpw+1;  		//字长写

	tmph=*ptrh;    		//半字读
	*ptrh=tmph+1;  		//半字写

	tmpb=*ptrb;     	//字节读
	*ptrb=tmpb+1;   	//字节写

	return 0;
}