/*
* File: main.c
*
* uC/OS Real-time multitasking kernel for the ARM processor.
*
* This program is an example of using semaphore to
* implement task rendevous.
*
* Created by Marco Graziano (marcog@crl.com).
*
*/
#include "includes.h" /* uC/OS interface */
/* allocate memory for tasks' stacks */
#ifdef SEMIHOSTED
#define STACKSIZE (SEMIHOSTED_STACK_NEEDS+64)
#else
#define STACKSIZE 128
#endif
unsigned int Stack1[STACKSIZE];
unsigned int Stack2[STACKSIZE];
unsigned int Stack3[STACKSIZE];
/* semaphores event control blocks */
//OS_EVENT *Sem1;
//OS_EVENT *Sem2;
//OS_EVENT *Sem3;
OS_EVENT *KeyPress;
void *KeyMsg[10];
/*
* Task running at the highest priority.
*/
void Task1(void *i)
{
unsigned char key[5];
unsigned char i1,temp;
unsigned char NewKey,OldKey;
ARMTargetStart();
for (;;)
{
NewKey=rPDATG&0xf0;
if(NewKey!=OldKey)
{
OldKey=NewKey;
if((NewKey&0x10)==0) temp='a';
else if((NewKey&0x20)==0) temp='b';
else if((NewKey&0x40)==0) temp='c';
else if((NewKey&0x80)==0) temp='d';
else temp=0;
if(temp!=0)
{
for(i1=0;i1<5;i1++) if(key[i1]==0) break;
key[i1]=temp;
OSQPost(KeyPress,&(key[i1]));
}
}
OSTimeDly(20); //20ms
}
}
void Task2(void *i)
{
unsigned char key[5];
unsigned char i1;
unsigned char NewKey;
for (;;)
{
NewKey=Uart_GetKey();
if(NewKey!=0)
{
for(i1=0;i1<5;i1++) if(key[i1]==0) break;
key[i1]=NewKey;
OSQPost(KeyPress,&(key[i1]));
}
OSTimeDly(10);
}
}
void Task3(void *i)
{
unsigned char *ip;
INT8U err;
for (;;)
{
ip=OSQPend(KeyPress,0,&err);
if(*ip=='a') Uart_Printf("\nYou Press a!");
else if(*ip=='b') Uart_Printf("\nYou Press b!");
else if(*ip=='c') Uart_Printf("\nYou Press c!");
else if(*ip=='d') Uart_Printf("\nYou Press d!");
*ip=0;
}
}
/*
* Main function.
*/
void Main(void)
{
char Id1 = '1';
char Id2 = '2';
char Id3 = '3';
Port_Init();
Uart_Init(0,57600);
Delay(1000);
Uart_Select(0); //Select UART0
Uart_Printf("Uc-OS ii will run at once!");
/* do target (uHAL based ARM system) initialisation */
ARMTargetInit();
/* needed by uC/OS */
OSInit();
OSTimeSet(0);
/*
* create the semaphores
*/
//Sem1 = OSSemCreate(1);
//Sem2 = OSSemCreate(1);
//Sem3 = OSSemCreate(1);
/*
* create the tasks in uC/OS and assign decreasing
* priority to them
*/
OSTaskCreate(Task1, (void *)&Id1, (void *)&Stack1[STACKSIZE - 1], 1);
OSTaskCreate(Task2, (void *)&Id2, (void *)&Stack2[STACKSIZE - 1], 2);
OSTaskCreate(Task3, (void *)&Id3, (void *)&Stack3[STACKSIZE - 1], 3);
/* Start the (uHAL based ARM system) system running */
//ARMTargetStart();
KeyPress=OSQCreate(KeyMsg,10); //创建一个按键的消息队列
/* start the game */
OSStart();
/* never reached */
} /* main */
|
楼主
标题置顶
标题高亮
