setuart.c

来自「The source code example of ARM9 developm」· C语言 代码 · 共 46 行

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>

int main(int argc, char** argv)
{
	int type, dip_sw, i;
	int fd = open("/dev/ttyS1",O_RDWR);
	
	if(argc < 2){ /* display current UART type */
		if(ioctl(fd, 0xe001, &type) == 0){
			printf("Port1 Type:%d\n",type);
			ioctl(fd, 0xe003, &type);
			printf("Port1 Mode9:%d\n", type);
		}	
		else	printf("Port1 Type:Unknown!\n");
		close(fd);
		return 0;		
	}
	else if(argc >= 2){
			type = atoi(argv[1]);
			if(ioctl(fd, 0xe002, &type) == 0)
				printf("Set UART Type to %d.\n", type);
			if(argc > 2){
				type = atoi(argv[2]);
				if(type == 1)
					ioctl(fd, 0xe004, &type);
				else	{
					type = 0;
					ioctl(fd, 0xe004, &type);  
				}
				printf("Set UART MODE9 to %d.\n", type);
			}
			
			close(fd);
			return 1;
		}

	printf("Usage: setuart type mode9, type:232,422 or 485 mode9:1 or 0\n");

	close(fd);
	return 0;
}