test1.c

Vxworks的培训教程,大家分享下啊,

#include "vxWorks.h"

int delay = 2;

STATUS test1 (channel, seconds)
	int channel, seconds;
	{
	double volts = 0.0;
	double increment = 1.0;
	int tickDelay = sysClkRateGet() / delay;
	int timeToStop = tickGet() + 1 + seconds * sysClkRateGet();

	while (timeToStop > tickGet())
		{
		if (dac (channel, volts) == ERROR)
			return (ERROR);
		taskDelay (tickDelay);
		volts += increment;
		if (volts > 10.0 || volts < 0.0)
			{
			increment *= -1;
			volts += 2 * increment;
			}
		}
	return (OK);
	}