main.c

该源码是创维特ARM7 JX44B0X板的例子程序

/*
 * timer application code
 * compile :
 *          $arm-elf-gcc -Wl,-elf2flt -o keystep keyboard.c stepper.c
 *          $cp keystep /tftpboot/examples
 * run in target:
 *          #cd /var
 *          #ftp 192.168.1.180
 *          ftp>bin
 *          ftp>cd /tftpboot/examples
 *          ftp>get keystep
 *          ftp>by
 *          #./keystep
 */
int main(int argc, char **argv)
{
    int step_status = 0, step_direct = 1; 

    /* init */
    stepper_init();
    key_init();

    /* printf prompt information */
    printf("stepper controler\ncontrol stepper motor with keyboard\n");
    printf("please choice:\n");
    printf("  1    -- direct");
    printf("  2    -- stop/start\n");
    printf("  up   -- speed up\n");
    printf("  down -- speed down\n");

    /* get key from the keyboard and control stepper motor */
    while(1)
    {
        char key;
        key = DrvKeyGet();
        if(key != 0)
	{
	    switch(key)
	    {
		case 'C':
		printf("speed up\n");
		stepper_speedup();
		break;
		case 'D':
		printf("speed down\n");
		stepper_speeddown();
		break;
		case 'E':
		printf("exit\n");
		break;
		case '1':
		printf("change direct\n");
		stepper_set_direct(step_direct);
		step_direct ^= 0x01;
		break;
		case '2':
		printf("start/stop\n");
		stepper_control(step_status);
		step_status ^= 0x01;
		break;
	    }
	}
    };
    exit(0);
}