（oledSSD1306）的简易多级菜单

ps：以前写的一个超级简单的多级菜单（hh）

#include "task.h"
#include "led.h"
#include "oled.h"
#include "delay.h"
#include "sys.h"
/*
---目前只有三个任务---
--需要更多可自行添加--
*/

u8 task = 0;	/*任务项目*/
u8 task_sign = 1;	/*任务标志*/
u8 key_sign = 0;	/*按键标志*/

void Task_manage()
{
	switch(task)
	{
		case 0:	Task_Display();	break;
		case 1:	Task_1();		break;
		case 2:	Task_2();		break;
		case 3:	Task_3();		break;
	}
}

void Task_Display()
{
	if(IN1 == 0)
	{
		while( IN1 == 0 );
		task_sign --;
		if(task_sign <= 0)
		{
			task_sign = 3;	/*task_sign 溢出就清零*/
		}
	}
	if(IN3 == 0)
	{
		while( IN3 == 0 );
		task_sign ++;
		if(task_sign >= 4)
		{
			task_sign = 1;	/*task_sign 溢出就清零*/
		}
	}
	
	if(task_sign == 1)
	{
		OLED_ShowString(16,0,"Task_manage",16,1);
		OLED_ShowString(30,16,"Task_One",16,0);
		OLED_ShowString(30,32,"Task_Two",16,1);
		OLED_ShowString(30,48,"Task_Three",16,1);
		if(IN2 == 0)
		{
			OLED_Clear();
			while(IN2 == 0);
			Task_1();		/*确定进入任务1*/
		}
	}
	else if(task_sign == 2)
	{
		OLED_ShowString(16,0,"Task_manage",16,1);
		OLED_ShowString(30,16,"Task_One",16,1);
		OLED_ShowString(30,32,"Task_Two",16,0);
		OLED_ShowString(30,48,"Task_Three",16,1);
		if(IN2 == 0)
		{
			OLED_Clear();
			while(IN2 == 0);
			Task_2();		/*确定进入任务2*/
		}
	}
	else if(task_sign == 3)
	{
		OLED_ShowString(16,0,"Task_manage",16,1);
		OLED_ShowString(30,16,"Task_One",16,1);
		OLED_ShowString(30,32,"Task_Two",16,1);
		OLED_ShowString(30,48,"Task_Three",16,0);
		if(IN2 == 0)
		{
			OLED_Clear();
			while(IN2 == 0);
			Task_3();		/*确定进入任务3*/
		}
	}
	else;	/**防止跑飞*/
}

void Task_1()
{
	/*任务1进程*/
	while(1)
	{
		OLED_Refresh();			/*实时刷新	*/
		OLED_ShowString(35,0,"Task_One",16,1);
		OLED_ShowString(20,16,"HR1:",16,1);
		OLED_ShowString(20,32,"HR2:",16,1);
		OLED_ShowNum(55,16,GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_8),1,16,1);
		OLED_ShowNum(55,32,GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_9),1,16,1);
		
		if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_8) == 0)
		{
			LED0 = 0;
		}
		if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_8) == 1)
		{
			LED0 = 1;
		}
		
		if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_9) == 0)
		{
			LED0 = 0;
		}
		if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_9) == 1)
		{
			LED0 = 1;
		}
		
		/*Run进程1*/
		if(IN4 == 0)
		{
			key_sign = 1;		/*按键标志清零*/
			while(IN4 == 0);
			OLED_Clear();
			break;
		}
	}
}

void Task_2()
{
	/*任务2进程*/
	while(1)
	{
		OLED_Refresh();			/*实时刷新	*/
		OLED_ShowString(35,0,"Task_Two",16,1);
		//getVoltage();
		OLED_ShowString(20,32,"No_Task!!!!!!",16,1);
		
		/*Run进程2*/
		if(IN4 == 0)
		{
			key_sign = 1;		/*按键标志清零*/
			while(IN4 == 0);
			OLED_Clear();
			break;
		}
	}
}

void Task_3()
{
	/*任务3进程*/
	while(1)
	{
		OLED_Refresh();			/*实时刷新	*/
		OLED_ShowString(30,0,"Task_Three",16,1);
		
		OLED_ShowString(20,32,"No_Task!!!!!!",16,1);
		
		/*Run进程3*/
		if(IN4 == 0)
		{
			key_sign = 1;		/*按键标志清零*/
			while(IN4 == 0);
			OLED_Clear();
			break;
		}
	}
}