按键控制流水灯快慢及其方向

说明:目的是为了实现通过两个按键控制,一个实现控制流水灯的方向,另一个是控制流水灯的快慢。

2:芯片基于STM32F103RB    型号为——CT117E

#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x.h"
#include "core_cm3.h"
#include "misc.h
"

#define LED0    GPIO_Pin_8
#define LED1    GPIO_Pin_9
#define LED2    GPIO_Pin_10
#define LED3    GPIO_Pin_11
#define LED4    GPIO_Pin_12
#define LED5    GPIO_Pin_13
#define LED6    GPIO_Pin_14
#define LED7    GPIO_Pin_15
#define LED_ALL (LED0 | LED1 | LED2 | LED3 | LED4 | LED5 | LED6 | LED7)
#define LED_PORT GPIOC
#define N_LE	GPIO_Pin_2
#define N_LE_PORT	GPIOD
#define SWN	4	/*????*/
#define N_K1	GPIO_Pin_0
#define N_K2	GPIO_Pin_8
#define N_K3	GPIO_Pin_1
#define N_K4	GPIO_Pin_2
#define N_K1C	GPIOA
#define N_K2C	GPIOA
#define N_K3C	GPIOB
#define N_K4C	GPIOB

#define LED_OUT(x) 	GPIO_SetBits(LED_PORT,LED_ALL), \
			GPIO_ResetBits(LED_PORT, x<<8), \
			GPIO_SetBits(N_LE_PORT,N_LE), \
			GPIO_ResetBits(N_LE_PORT,N_LE)

标记的定义:
typedef enum
{ 
	FALSE = 0,
  	TRUE
}y_bool;
static y_bool led_t = TRUE;	//发光标记
static y_bool rl = TRUE;	//左移右移
static y_bool km = TRUE;	//快慢
static y_bool key_t = FALSE;	//按键检测标记


 
   
  
void init()
{
	GPIO_InitTypeDef GPIO_InitStructure;
	//
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);				
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD , ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);				
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE);

	//LED
	GPIO_InitStructure.GPIO_Pin = LED_ALL ;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
	GPIO_Init(LED_PORT , &GPIO_InitStructure);

	/*N_LE*/ 
	GPIO_InitStructure.GPIO_Pin=N_LE;
	GPIO_Init(N_LE_PORT , &GPIO_InitStructure);
	
	/*    */
	GPIO_InitStructure.GPIO_Pin =  N_K1 | N_K2;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
	GPIO_Init(N_K1C , &GPIO_InitStructure);
	GPIO_InitStructure.GPIO_Pin =  N_K3 | N_K4;
	GPIO_Init(N_K3C , &GPIO_InitStructure);


	/* 时钟*/
   	//SysTick_Config(8000);
}
//SysTick定义快慢
void SysTick_Handler()				
{
	static uint16_t i = 0;
	if(++i >= 1000)        
		i = 0;
	if(i % 20 == 0)
		key_t = TRUE;
	if(i%500 == 0)
		led_t = TRUE;
}

/*时钟的初始化*/
void SysT()
{
	if(km)
	SysTick_Config(8000);
	else
		 SysTick_Config(2000);
}

/*Led显示*/
void Led()
{
	static uint8_t led_b = 0x01;
	LED_OUT(led_b);//数据输出
	SysT();//调用时钟
	if(rl)//判断左移还是右移
	{
		if((led_b <<= 1) == 0x00)
			led_b = 0x01;
	}
	else
	{
		if((led_b >>= 1) == 0x00)
			led_b = 0x80;
	}
}


/*按键的检测*/
uint8_t key_c()
{
	static uint8_t key_o = 0x0f;
	uint8_t i, key_n, x;
	const uint16_t key_pin[SWN] = {N_K1, N_K2, N_K3, N_K4};		//引脚
	const GPIO_TypeDef* key_port[SWN] = {N_K1C, N_K2C, N_K3C, N_K4C};//各个端口
	for(key_n = 0, i = 0; i < SWN; i++)
	{
		key_n <<= 1;
		if(GPIO_ReadInputDataBit((GPIO_TypeDef*)key_port[i], key_pin[i]))
		  key_n |= 0x01;  
	}
	x = (key_n ^ key_o) & key_o;//检测有无按键按下
	key_o = key_n;//当前按键值作为下一次比较的值
	return x;
}
/*按键的处理*/
void key_d(uint8_t x)
{
	if(x & 0x08)
		rl = !rl;
	if(x & 0x04)
		km = !km;
}

主函数:

int main()
{	
	uint8_t key_dn;
	init();	
	while(1)
	{
		if(led_t)
		{
			led_t = FALSE;
			Led();		
		}
		/*°´¼üÒ»¼ì²â£¨×óÓÒÒƶ¯£©*/
		if(key_t)
		{
			key_t = FALSE;
			key_dn = key_c();
		}
		if(key_dn)
		{
			key_d(key_dn);
			key_dn = 0x00;
		}
  }
		
}






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