需要之前看过 “SinlinxA33搭建Qt App开发环境编写helloworld” “芯灵思Sinlinx A33实现linux led驱动” 这两篇帖子,了解QT编程
主要代码:
#include "widget.h"
#include "led.h"
#include <qpushbutton.h>
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
Led *led = new Led(); //led对象
QPushButton *led_off = new QPushButton("LED_OFF",this);
QPushButton *led_on = new QPushButton("LED ON",this);
led_on->setGeometry(75, 50, 75, 40); //设置按钮位置
led_off->setGeometry(300, 50, 75, 40);
connect(led_off,SIGNAL(clicked(bool)),led,SLOT(led_off()));//消息函数
connect(led_on,SIGNAL(clicked(bool)),led,SLOT(led_on()));
}#include "led.h"
Led::Led()
{
}
int Led::led_on(void)
{
int fd;
int val = 1;
fd = open("/dev/ledzzzzzzzz", O_RDWR);
if (fd < 0)
{
return -1;
}
else
write(fd, &val, 1);
return 0;
}
int Led::led_off(void)
{
int fd;
int val = 0;
fd = open("/dev/ledzzzzzzzz", O_RDWR);
if (fd < 0)
{
return -1;
}
else
write(fd, &val, 1);
return 0;
}
Led::~Led(void)
{
}
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