led.c

来自「使用uCLinux在ARM LPC2200系列实验板上开发的LED程序」· C语言 代码 · 共 32 行

#define IN_TGPIO
#include "config.h"

#define LEDS8  16     // P2[23:16] controle LED8~LED1

int main(void)
{
    int fd;
    uint8 i, val;

    fd = open("/dev/P2", O_RDONLY);
    if(fd == -1)
    {
        printf("\nCan't open P2!\n");
        return -1;
    }

    ioctl(fd, GPIO_SET_MULTI_PIN_OUT, 0xFF << LEDS8);
    while(1)
    {
				val = 0x07<<i;
        ioctl(fd, GPIO_SET_ALL_PIN, ~val << LEDS8);
        ioctl(fd, GPIO_CLR_ALL_PIN, val << LEDS8);
        sleep(1);
        i++; 
        if(i>8) i=0;
 }

    close(fd);
    return 0;
}