STM32F103(按键控制流水灯方向)

1:要求   用按键控制流水灯方向

2：基于Stm32F103RB

3:型号CT117E

/*STM32库头文件*/

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

GPIO口的设置，还有宏的定义

#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
/*宏*/
#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)

定义数组和一些标记

typedef enum
{ 
	FALSE = 0,
  	TRUE
}y_bool;
static y_bool led_t = TRUE;	//发光标记
static y_bool rl = TRUE;	//左移右移标记
static y_bool key_t = FALSE;	//按键的检测

void SystemInit()
{
 //SystemInit为空为了骗过编译器，没有任何作用
}

/*主函数*/

int main()
{	
	uint8_t key_dn;
	init();	
	while(1)
	{
		if(led_t)
		{
			led_t = FALSE;
			Led();		//
		}
		if(key_t)
		{
			key_t = FALSE;
			key_dn = key_c();//按键检测
		}
		
		if(key_dn)
		{
			key_d(key_dn);//按键处理
			key_dn = 0x00;
		}
	}
}

void init()//GPIO口的初始化 {  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);

 /*滴答定时器初始*/     SysTick_Config(8000); }

//SysTick 中断
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;
}

/*Led显示*/
void Led()
{
	static uint8_t led_b = 0x01;
	LED_OUT(led_b);//数据的输出
	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;
	}
}

/*按键检测函数*/
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};		//各个按键的引脚
	const GPIO_TypeDef* key_port[SWN] = {N_K1C, N_K2C, N_K3C, N_K4C};//各个按键的端口
	for(key_n = 0, i = 0; i < SWN; i++)//当按键按下赋值到key_n中
	{
		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;//与下一次值比较
	return x;
}

//按键的处理

void key_d(uint8_t x)
{
	if(x & 0x08)
		rl = !rl;
}

/*刚刚入手学习STM32有不足之处，望大家指出*/