#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "includes.h"
#include "led.h"
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//UCOSIIIÖÐÒÔÏÂÓÅÏȼ¶Óû§³ÌÐò²»ÄÜʹÓã¬ALIENTEK
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//ÓÅÏȼ¶0£ºÖжϷþÎñ·þÎñ¹ÜÀíÈÎÎñ OS_IntQTask()
//ÓÅÏȼ¶1£ºÊ±ÖÓ½ÚÅÄÈÎÎñ OS_TickTask()
//ÓÅÏȼ¶2£º¶¨Ê±ÈÎÎñ OS_TmrTask()
//ÓÅÏȼ¶OS_CFG_PRIO_MAX-2£ºÍ³¼ÆÈÎÎñ OS_StatTask()
//ÓÅÏȼ¶OS_CFG_PRIO_MAX-1£º¿ÕÏÐÈÎÎñ OS_IdleTask()
/*
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*/
/*
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UCOS IIIÈÎÎñµÄÖ´ÐÐÊÇͨ¹ýÉÏÏÂÎÄÇл»ÊµÏֵġ£
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µ±Ò»¸öÈÎÎñÐèÒª±»ÖÐֹʱ£¬¼´Ö´ÐÐOS_TaskSuspend()º¯Êýʱ£¬UCOS III´¦ÀíÆ÷»áÖ´ÐÐÒ»¸öÈÎÎñÇл»Öжϲ¢½«¿ØÖÆȨתÒƵ½ÁíÒ»¸öÈÎÎñ¡£
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*/
//¿ªÊ¼ÈÎÎñ£¬´´½¨ÍêÈÎÎñ¶þºÍÈÎÎñÈý¾Íɾ³ý×Ô¼º
//ÈÎÎñÓÅÏȼ¶
#define START_TASK_PRIO 3
//ÈÎÎñ¶ÑÕ»´óС
#define START_STK_SIZE 128
//ÈÎÎñ¿ØÖÆ¿é
OS_TCB StartTaskTCB;
//ÈÎÎñ¶ÑÕ»
CPU_STK START_TASK_STK[START_STK_SIZE];
//ÈÎÎñº¯Êý
void start_task(void *p_arg);
///ÈÎÎñ¶þÁÁµÆ£¬²¢´òÓ¡³öÐÅÏ¢
//ÈÎÎñÓÅÏȼ¶
#define TASK1_TASK_PRIO 4
//ÈÎÎñ¶ÑÕ»´óС
#define TASK1_STK_SIZE 128
//ÈÎÎñ¿ØÖÆ¿é
OS_TCB Task1_TaskTCB;
//ÈÎÎñ¶ÑÕ»
CPU_STK TASK1_TASK_STK[TASK1_STK_SIZE];
void task1_task(void *p_arg);
///ÈÎÎñÈý£¬´òÓ¡ÈÎÎñÈýÖ´ÐÐÐÅÏ¢
//ÈÎÎñÓÅÏȼ¶
#define TASK2_TASK_PRIO 5
//ÈÎÎñ¶ÑÕ»´óС
#define TASK2_STK_SIZE 128
//ÈÎÎñ¿ØÖÆ¿é
OS_TCB Task2_TaskTCB;
//ÈÎÎñ¶ÑÕ»
CPU_STK TASK2_TASK_STK[TASK2_STK_SIZE];
//ÈÎÎñº¯Êý
void task2_task(void *p_arg);
volatile u8 key_pressed = 0;
volatile u8 current_task = 1;
void KEY_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; // ????
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
void Key_Scan(void) {
static u8 key_up = 1;
if (key_up && GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0)) {
delay_ms(20); // ??
if (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0)) {
key_up = 0;
key_pressed = 1; // ??????
}
} else if (!GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0)) {
key_up = 1;
}
}
//Ö÷º¯Êý
int main(void)
{
OS_ERR err;
CPU_SR_ALLOC();
SystemInit();//ÓÉÓÚ±¾¹¤³ÌÊÇÓÉstm32f103zet6ÒÆÖ²ËùÀ´£¬Òò´ËÕâÀïÒò¼ÓÈë±¾º¯ÊýÈ·±£delayº¯ÊýÕý³£Ê¹ÓÃ
delay_init(); //ʱÖÓ³õʼ»¯
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//ÖжϷÖ×éÅäÖÃ
uart_init(115200); //´®¿Ú³õʼ»¯
LED_Init();
KEY_Init(); // ???????
OSInit(&err); //³õʼ»¯UCOSIII
OS_CRITICAL_ENTER(); //½øÈëÁÙ½çÇø
//´´½¨¿ªÊ¼ÈÎÎñ
OSTaskCreate((OS_TCB * )&StartTaskTCB, //ÈÎÎñ¿ØÖÆ¿é
(CPU_CHAR * )"start task", //ÈÎÎñÃû×Ö
(OS_TASK_PTR )start_task, //ÈÎÎñº¯Êý
(void * )0, //´«µÝ¸øÈÎÎñº¯ÊýµÄ²ÎÊý
(OS_PRIO )START_TASK_PRIO, //ÈÎÎñÓÅÏȼ¶
(CPU_STK * )&START_TASK_STK[0], //ÈÎÎñ¶ÑÕ»»ùµØÖ·
(CPU_STK_SIZE)START_STK_SIZE/10, //ÈÎÎñ¶ÑÕ»Éî¶ÈÏÞλ
(CPU_STK_SIZE)START_STK_SIZE, //ÈÎÎñ¶ÑÕ»´óС
(OS_MSG_QTY )0, //ÈÎÎñÄÚ²¿ÏûÏ¢¶ÓÁÐÄܹ»½ÓÊÕµÄ×î´óÏûÏ¢ÊýÄ¿,Ϊ0ʱ½ûÖ¹½ÓÊÕÏûÏ¢
(OS_TICK )0, //µ±Ê¹ÄÜʱ¼äƬÂÖתʱµÄʱ¼äƬ³¤¶È£¬Îª0ʱΪĬÈϳ¤¶È£¬
(void * )0, //Óû§²¹³äµÄ´æ´¢Çø
(OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR, //ÈÎÎñÑ¡Ïî
(OS_ERR * )&err); //´æ·Å¸Ãº¯Êý´íÎóʱµÄ·µ»ØÖµ
OS_CRITICAL_EXIT(); //Í˳öÁÙ½çÇø
OSStart(&err); //¿ªÆôUCOSIII
}
//¿ªÊ¼ÈÎÎñÈÎÎñº¯Êý
void start_task(void *p_arg)
{
OS_ERR err;
CPU_SR_ALLOC();
p_arg = p_arg;
CPU_Init();
#if OS_CFG_STAT_TASK_EN > 0u
OSStatTaskCPUUsageInit(&err); //ͳ¼ÆÈÎÎñ
#endif
#ifdef CPU_CFG_INT_DIS_MEAS_EN //Èç¹ûʹÄÜÁ˲âÁ¿ÖжϹرÕʱ¼ä
CPU_IntDisMeasMaxCurReset();
#endif
#if OS_CFG_SCHED_ROUND_ROBIN_EN //µ±Ê¹ÓÃʱ¼äƬÂÖתµÄʱºò
//ʹÄÜʱ¼äƬÂÖתµ÷¶È¹¦ÄÜ,ʱ¼äƬ³¤¶ÈΪ1¸öϵͳʱÖÓ½ÚÅÄ£¬¼È1*5=5ms
OSSchedRoundRobinCfg(DEF_ENABLED,1,&err);
#endif
OS_CRITICAL_ENTER(); //½øÈëÁÙ½çÇø
//´´½¨TASK1ÈÎÎñ
OSTaskCreate((OS_TCB * )&Task1_TaskTCB,
(CPU_CHAR * )"Task1 task",
(OS_TASK_PTR )task1_task,
(void * )0,
(OS_PRIO )TASK1_TASK_PRIO,
(CPU_STK * )&TASK1_TASK_STK[0],
(CPU_STK_SIZE)TASK1_STK_SIZE/10,
(CPU_STK_SIZE)TASK1_STK_SIZE,
(OS_MSG_QTY )0,
(OS_TICK )0,
(void * )0,
(OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR,
(OS_ERR * )&err);
//´´½¨TASK2ÈÎÎñ
OSTaskCreate((OS_TCB * )&Task2_TaskTCB,
(CPU_CHAR * )"task2 task",
(OS_TASK_PTR )task2_task,
(void * )0,
(OS_PRIO )TASK2_TASK_PRIO,
(CPU_STK * )&TASK2_TASK_STK[0],
(CPU_STK_SIZE)TASK2_STK_SIZE/10,
(CPU_STK_SIZE)TASK2_STK_SIZE,
(OS_MSG_QTY )0,
(OS_TICK )0,
(void * )0,
(OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR,
(OS_ERR * )&err);
OS_CRITICAL_EXIT(); //Í˳öÁÙ½çÇø
OSTaskDel((OS_TCB*)0,&err); //ɾ³ýstart_taskÈÎÎñ×ÔÉí
}
// ??1:??PB0(LED0)
void task1_task(void *p_arg) {
OS_ERR err;
while (1) {
Key_Scan();
if (key_pressed) {
current_task = 2; // ?????2
key_pressed = 0;
printf("Switch to Task2\n");
} else {
// LED0??
GPIO_SetBits(GPIOB, GPIO_Pin_0); // LED0?
OSTimeDlyHMSM(0, 0, 0, 5000, OS_OPT_TIME_HMSM_STRICT, &err); // 500ms
GPIO_ResetBits(GPIOB, GPIO_Pin_0); // LED0?
OSTimeDlyHMSM(0, 0, 0, 5000, OS_OPT_TIME_HMSM_STRICT, &err); // 500ms
}
}
}
void task2_task(void *p_arg) {
OS_ERR err;
while (1) {
Key_Scan();
if (key_pressed) {
current_task = 1; // ?????1
key_pressed = 0;
printf("Switch back to Task1\n");
} else {
// ????2???
// ??:LED1??
GPIO_SetBits(GPIOB, GPIO_Pin_1); // LED1?
OSTimeDlyHMSM(0, 0, 0, 5000, OS_OPT_TIME_HMSM_STRICT, &err); // 500ms
GPIO_ResetBits(GPIOB, GPIO_Pin_1); // LED1?
OSTimeDlyHMSM(0, 0, 0, 5000, OS_OPT_TIME_HMSM_STRICT, &err); // 500ms
}
}
}我现在需要刚开始时B0（任务一）LED闪烁，当按下按键后（A0）给予信息量，使得代码进入（任务二），再次摁下按键，两个任务均不执行
ALEXA搜索引擎简介
本文介绍了一个名为ALEXA的搜索引擎，该搜索引擎提供分类目录式的网站导航服务。不同于专门做网站流量排名的站点，ALEXA更专注于提供搜索服务。
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