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*/