📄 hello.cpp
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#include "hello.h"#include <qlabel.h>#include <stdio.h>#include <fcntl.h>#include <stdlib.h>#include <unistd.h>#include <sys/ioctl.h>void dly(int t){ long i; for(;t>0;t--) for(i=0;i<50000;i++);}HelloForm::HelloForm( QWidget* parent, const char* name, WFlags fl):HelloBaseForm(parent, name, fl){}HelloForm::~HelloForm(){}void HelloForm::SayHello(){ MessageLabel->setText("Hello dds,you do a good job!");}void HelloForm::Saygoodbye(){ MessageLabel->setText("Goodbye dds!!");}void HelloForm::dds(){ int fd,i,x; fd = open("/dev/leds", 0); if (fd < 0) { perror("Failed to open leds"); exit(1); } for(x=0;x<5;x++) { for(i=0;i<=3;i++) { ioctl(fd,1,i); dly(20); ioctl(fd,0,i); } dly(100); for(i=3;i>=0;i--) { ioctl(fd,1,i); dly(20); ioctl(fd,0,i); } dly(100); } close(fd); }
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