不用OS,俺也能实现多任务切换。算是个“开裆裤”吧
#include<setjump.h>
jmp_buf jumper0,jumper1,jumper2,jumper3;
void Task0()
{
static int n=0;
if(setjmp(jumper0)>0)
{
while(1)
{
if(setjmp(jumper0)==0) longjump(jumper1,1); //任务切换
n++; //一段任务代码
if(setjmp(jumper0)==0) longjump(jumper1,1); //任务切换
n++; //一段任务代码
}
}
}
void Task1()
{
static int n=0;
if(setjmp(jumper1)>0)
{
while(1)
{
if(setjmp(jumper1)==0) longjump(jumper2,1);
n++;
if(setjmp(jumper1)==0) longjump(jumper2,1);
n++;
}
}
}
void Task2()
{
static int n=0;
if(setjmp(jumper2)>0)
{
while(1)
{
if(setjmp(jumper2)==0) longjump(jumper3,1);
n++;
if(setjmp(jumper2)==0) longjump(jumper3,1);
n++;
}
}
}
void Task3()
{
static int n=0;
if(setjmp(jumper3)>0)
{
while(1)
{
if(setjmp(jumper3)==0) longjump(jumper0,1);
n++;
if(setjmp(jumper3)==0) longjump(jumper0,1);
n++;
}
}
}
void InitTask()
{
Task0();
Task1();
Task2();
Task3();
}
main()
{
InitTask();
longjmp(jumper0,1)
}
//以上代码在keil c中调试通过
//非占先式任务切换
//任务内变量必须是静态的，子程序不用
//任务内不要用寄存器变量 |
|
楼主
