watch.cpp

在学习VxWorks I/O 系统功能的基础上

#include <vxworks.h>
#include <tasklib.h>
#include <syslib.h>
#include <tylib.h>
#include <fiolib.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define START   0
#define STOP    1
#define PAUSE   2

void refresh();

int tick = 0;
int state = STOP;

int stdIN, stdOUT;

int watch()
{
	char c;
	int cnt;

	stdIN = ioGlobalStdGet(0);
	stdOUT = ioGlobalStdGet(1);

	ioctl(stdOUT, FIOFLUSH, 0);
	ioctl(stdOUT, FIOSETOPTIONS, OPT_RAW);

	while (1)
	{
		/* 延迟 0.1 秒 */
		taskDelay(sysClkRateGet()/10);

		/* 如果当前状态不是停止且不是暂停的话那么计数加一 */
		if (state == START)
			tick += 1;

		refresh();

		ioctl (stdIN, FIONREAD, (int) &cnt);
		if (cnt)
		{
			read(stdIN, &c, 1);

			if (c == 'q')
			{
				break;
			}
			else if (c == '5')
			{
				// write(stdOUT, "+", 1);
				if (state == STOP)
					state = START;
				else
					state = STOP;
			}
			else if (c == '6')
			{
				if (state == START)
					state = PAUSE;
				else if (state == PAUSE)
					state = START;
			}
			else if (c == '0')
			{
				tick = 0;
			}
		}
	}
	// write(stdOUT, "\n\rbye...\n\r", 8);

	ioctl(stdOUT, FIOSETOPTIONS, OPT_TERMINAL);
	return 0;
}

void refresh()
{
	fdprintf(stdOUT, "%02d:%02d.%d\r", tick/600, tick/10%60, tick%10);
}