STM32 入门教程（江科大教材）#笔记2
3-4按键控制LED
/** LED.c**/
#include "stm32f10x.h" // Device header
void LED_Init(void)
{
/*开启时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //开启GPIOA的时钟
/*GPIO初始化*/
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure); //将PA1和PA2引脚初始化为推挽输出
/*设置GPIO初始化后的默认电平*/
GPIO_SetBits(GPIOA, GPIO_Pin_1 | GPIO_Pin_2); //设置PA1和PA2引脚为高电平
}
/**
* 函 数：LED1开启
* 参 数：无
* 返 回 值：无
*/
void LED1_ON(void)
{
GPIO_ResetBits(GPIOA, GPIO_Pin_1); //设置PA1引脚为低电平
}
/**
* 函 数：LED1关闭
* 参 数：无
* 返 回 值：无
*/
void LED1_OFF(void)
{
GPIO_SetBits(GPIOA, GPIO_Pin_1); //设置PA1引脚为高电平
}
void LED1_Turn(void)
{
if (GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_1) == 0) //获取输出寄存器的状态，如果当前引脚输出低电平
{
GPIO_SetBits(GPIOA, GPIO_Pin_1); //则设置PA1引脚为高电平
}
else //否则，即当前引脚输出高电平
{
GPIO_ResetBits(GPIOA, GPIO_Pin_1); //则设置PA1引脚为低电平
}
}
/**
* 函 数：LED2开启
* 参 数：无
* 返 回 值：无
*/
void LED2_ON(void)
{
GPIO_ResetBits(GPIOA, GPIO_Pin_2); //设置PA2引脚为低电平
}
/**
* 函 数：LED2关闭
* 参 数：无
* 返 回 值：无
*/
void LED2_OFF(void)
{
GPIO_SetBits(GPIOA, GPIO_Pin_2); //设置PA2引脚为高电平
}
/**
* 函 数：LED2状态翻转
* 参 数：无
* 返 回 值：无
*/
void LED2_Turn(void)
{
if (GPIO_ReadOutputDataBit(GPIOA, GPIO_Pin_2) == 0) //获取输出寄存器的状态，如果当前引脚输出低电平
{
GPIO_SetBits(GPIOA, GPIO_Pin_2); //则设置PA2引脚为高电平
}
else //否则，即当前引脚输出高电平
{
GPIO_ResetBits(GPIOA, GPIO_Pin_2); //则设置PA2引脚为低电平
}
}
/**Key.c**/
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
void Key_Init(void)
{
/*开启时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //开启GPIOB的时钟
/*GPIO初始化*/
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); //将PB1和PB11引脚初始化为上拉输入
}
/**
* 函 数：按键获取键码
* 参 数：无
* 返 回 值：按下按键的键码值，范围：0~2，返回0代表没有按键按下
* 注意事项：此函数是阻塞式操作，当按键按住不放时，函数会卡住，直到按键松手
*/
uint8_t Key_GetNum(void)
{
uint8_t KeyNum = 0; //定义变量，默认键码值为0
if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) == 0) //读PB1输入寄存器的状态，如果为0，则代表按键1按下
{
Delay_ms(20); //延时消抖
while (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_1) == 0); //等待按键松手
Delay_ms(20); //延时消抖
KeyNum = 1; //置键码为1
}
if (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_11) == 0) //读PB11输入寄存器的状态，如果为0，则代表按键2按下
{
Delay_ms(20); //延时消抖
while (GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_11) == 0); //等待按键松手
Delay_ms(20); //延时消抖
KeyNum = 2; //置键码为2
}
return KeyNum; //返回键码值，如果没有按键按下，所有if都不成立，则键码为默认值0
}
/**main.c**/
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "LED.h"
#include "Key.h"
uint8_t KeyNum; //定义用于接收按键键码的变量
int main(void)
{
/*模块初始化*/
LED_Init(); //LED初始化
Key_Init(); //按键初始化
while (1)
{
KeyNum = Key_GetNum(); //获取按键键码
if (KeyNum == 1) //按键1按下
{
LED1_Turn(); //LED1翻转
}
if (KeyNum == 2) //按键2按下
{
LED2_Turn(); //LED2翻转
}
}
}
3-5光敏传感器控制蜂鸣器
/*buzzer.c*/
#include "stm32f10x.h" // Device header
void Buzzer_Init(void)
{
/*开启时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //开启GPIOB的时钟
/*GPIO初始化*/
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); //将PB12引脚初始化为推挽输出
/*设置GPIO初始化后的默认电平*/
GPIO_SetBits(GPIOB, GPIO_Pin_12); //设置PB12引脚为高电平
}
void Buzzer_ON(void)
{
GPIO_ResetBits(GPIOB, GPIO_Pin_12); //设置PB12引脚为低电平
}
/**
* 函 数：蜂鸣器关闭
* 参 数：无
* 返 回 值：无
*/
void Buzzer_OFF(void)
{
GPIO_SetBits(GPIOB, GPIO_Pin_12); //设置PB12引脚为高电平
}
void Buzzer_Turn(void)
{
if (GPIO_ReadOutputDataBit(GPIOB, GPIO_Pin_12) == 0) //获取输出寄存器的状态，如果当前引脚输出低电平
{
GPIO_SetBits(GPIOB, GPIO_Pin_12); //则设置PB12引脚为高电平
}
else //否则，即当前引脚输出高电平
{
GPIO_ResetBits(GPIOB, GPIO_Pin_12); //则设置PB12引脚为低电平
}
}
/*lightsensor*/
#include "stm32f10x.h" // Device header
void LightSensor_Init(void)
{
/*开启时钟*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //开启GPIOB的时钟
/*GPIO初始化*/
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); //将PB13引脚初始化为上拉输入
}
uint8_t LightSensor_Get(void)
{
return GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_13); //返回PB13输入寄存器的状态
}
/*main.c*/
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "Buzzer.h"
#include "LightSensor.h"
int main(void)
{
/*模块初始化*/
Buzzer_Init(); //蜂鸣器初始化
LightSensor_Init(); //光敏传感器初始化
while (1)
{
if (LightSensor_Get() == 1) //如果当前光敏输出1
{
Buzzer_ON(); //蜂鸣器开启
}
else //否则
{
Buzzer_OFF(); //蜂鸣器关闭
}
}
}
4-1 OLED调试工具
OLED（Organic Light Emitting Diode）：有机发光二极管
OLED显示屏：性能优异的新型显示屏，具有功耗低、相应速度快、宽视角、轻薄柔韧等特点
0.96寸OLED模块：小巧玲珑、占用接口少、简单易用，是电子设计中非常常见的显示屏模块
供电：3~5.5V，通信协议：I2C/SPI，分辨率：128*64
三种调试方式
OLED的驱动函数
/**OLED.c**/
#include "stm32f10x.h"
#include "OLED_Font.h"
/*引脚配置*/
#define OLED_W_SCL(x) GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x))
#define OLED_W_SDA(x) GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x))
/*引脚初始化*/
void OLED_I2C_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_Init(GPIOB, &GPIO_InitStructure);
OLED_W_SCL(1);
OLED_W_SDA(1);
}
void OLED_I2C_Start(void)
{
OLED_W_SDA(1);
OLED_W_SCL(1);
OLED_W_SDA(0);
OLED_W_SCL(0);
}
/**
* @brief I2C停止
* @param 无
* @retval 无
*/
void OLED_I2C_Stop(void)
{
OLED_W_SDA(0);
OLED_W_SCL(1);
OLED_W_SDA(1);
}
void OLED_I2C_SendByte(uint8_t Byte)
{
uint8_t i;
for (i = 0; i > i));
OLED_W_SCL(1);
OLED_W_SCL(0);
}
OLED_W_SCL(1); //额外的一个时钟，不处理应答信号
OLED_W_SCL(0);
}
/**
* @brief OLED写命令
* @param Command 要写入的命令
* @retval 无
*/
void OLED_WriteCommand(uint8_t Command)
{
OLED_I2C_Start();
OLED_I2C_SendByte(0x78); //从机地址
OLED_I2C_SendByte(0x00); //写命令
OLED_I2C_SendByte(Command);
OLED_I2C_Stop();
}
void OLED_WriteData(uint8_t Data)
{
OLED_I2C_Start();
OLED_I2C_SendByte(0x78); //从机地址
OLED_I2C_SendByte(0x40); //写数据
OLED_I2C_SendByte(Data);
OLED_I2C_Stop();
}
void OLED_SetCursor(uint8_t Y, uint8_t X)
{
OLED_WriteCommand(0xB0 | Y); //设置Y位置
OLED_WriteCommand(0x10 | ((X & 0xF0) >> 4)); //设置X位置高4位
OLED_WriteCommand(0x00 | (X & 0x0F)); //设置X位置低4位
}
void OLED_Clear(void)
{
uint8_t i, j;
for (j = 0; j < 8; j++)
{
OLED_SetCursor(j, 0);
for(i = 0; i < 128; i++)
{
OLED_WriteData(0x00);
}
}
}
void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char)
{
uint8_t i;
OLED_SetCursor((Line - 1) * 2, (Column - 1) * 8); //设置光标位置在上半部分
for (i = 0; i < 8; i++)
{
OLED_WriteData(OLED_F8x16[Char - ' '][i]); //显示上半部分内容
}
OLED_SetCursor((Line - 1) * 2 + 1, (Column - 1) * 8); //设置光标位置在下半部分
for (i = 0; i < 8; i++)
{
OLED_WriteData(OLED_F8x16[Char - ' '][i + 8]); //显示下半部分内容
}
}
void OLED_ShowString(uint8_t Line, uint8_t Column, char *String)
{
uint8_t i;
for (i = 0; String[i] != '/**OLED.c**/
#include "stm32f10x.h"
#include "OLED_Font.h"
/*引脚配置*/
#define OLED_W_SCL(x) GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x))
#define OLED_W_SDA(x) GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x))
/*引脚初始化*/
void OLED_I2C_Init(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_Init(GPIOB, &GPIO_InitStructure);
OLED_W_SCL(1);
OLED_W_SDA(1);
}
void OLED_I2C_Start(void)
{
OLED_W_SDA(1);
OLED_W_SCL(1);
OLED_W_SDA(0);
OLED_W_SCL(0);
}
/**
* @brief I2C停止
* @param 无
* @retval 无
*/
void OLED_I2C_Stop(void)
{
OLED_W_SDA(0);
OLED_W_SCL(1);
OLED_W_SDA(1);
}
void OLED_I2C_SendByte(uint8_t Byte)
{
uint8_t i;
for (i = 0; i > i));
OLED_W_SCL(1);
OLED_W_SCL(0);
}
OLED_W_SCL(1); //额外的一个时钟，不处理应答信号
OLED_W_SCL(0);
}
/**
* @brief OLED写命令
* @param Command 要写入的命令
* @retval 无
*/
void OLED_WriteCommand(uint8_t Command)
{
OLED_I2C_Start();
OLED_I2C_SendByte(0x78); //从机地址
OLED_I2C_SendByte(0x00); //写命令
OLED_I2C_SendByte(Command);
OLED_I2C_Stop();
}
void OLED_WriteData(uint8_t Data)
{
OLED_I2C_Start();
OLED_I2C_SendByte(0x78); //从机地址
OLED_I2C_SendByte(0x40); //写数据
OLED_I2C_SendByte(Data);
OLED_I2C_Stop();
}
void OLED_SetCursor(uint8_t Y, uint8_t X)
{
OLED_WriteCommand(0xB0 | Y); //设置Y位置
OLED_WriteCommand(0x10 | ((X & 0xF0) >> 4)); //设置X位置高4位
OLED_WriteCommand(0x00 | (X & 0x0F)); //设置X位置低4位
}
void OLED_Clear(void)
{
uint8_t i, j;
for (j = 0; j < 8; j++)
{
OLED_SetCursor(j, 0);
for(i = 0; i < 128; i++)
{
OLED_WriteData(0x00);
}
}
}
void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char)
{
uint8_t i;
OLED_SetCursor((Line - 1) * 2, (Column - 1) * 8); //设置光标位置在上半部分
for (i = 0; i < 8; i++)
{
OLED_WriteData(OLED_F8x16[Char - ' '][i]); //显示上半部分内容
}
OLED_SetCursor((Line - 1) * 2 + 1, (Column - 1) * 8); //设置光标位置在下半部分
for (i = 0; i < 8; i++)
{
OLED_WriteData(OLED_F8x16[Char - ' '][i + 8]); //显示下半部分内容
}
}
void OLED_ShowString(uint8_t Line, uint8_t Column, char *String)
{
uint8_t i;
for (i = 0; String[i] != '\0'; i++)
{
OLED_ShowChar(Line, Column + i, String[i]);
}
}
/**
* @brief OLED次方函数
* @retval 返回值等于X的Y次方
*/
uint32_t OLED_Pow(uint32_t X, uint32_t Y)
{
uint32_t Result = 1;
while (Y--)
{
Result *= X;
}
return Result;
}
void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i;
for (i = 0; i = 0)
{
OLED_ShowChar(Line, Column, '+');
Number1 = Number;
}
else
{
OLED_ShowChar(Line, Column, '-');
Number1 = -Number;
}
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i + 1, Number1 / OLED_Pow(10, Length - i - 1) % 10 + '0');
}
}
void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i, SingleNumber;
for (i = 0; i < Length; i++)
{
SingleNumber = Number / OLED_Pow(16, Length - i - 1) % 16;
if (SingleNumber < 10)
{
OLED_ShowChar(Line, Column + i, SingleNumber + '0');
}
else
{
OLED_ShowChar(Line, Column + i, SingleNumber - 10 + 'A');
}
}
}
void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i;
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i, Number / OLED_Pow(2, Length - i - 1) % 2 + '0');
}
}
void OLED_Init(void)
{
uint32_t i, j;
for (i = 0; i < 1000; i++) //上电延时
{
for (j = 0; j < 1000; j++);
}
OLED_I2C_Init(); //端口初始化
OLED_WriteCommand(0xAE); //关闭显示
OLED_WriteCommand(0xD5); //设置显示时钟分频比/振荡器频率
OLED_WriteCommand(0x80);
OLED_WriteCommand(0xA8); //设置多路复用率
OLED_WriteCommand(0x3F);
OLED_WriteCommand(0xD3); //设置显示偏移
OLED_WriteCommand(0x00);
OLED_WriteCommand(0x40); //设置显示开始行
OLED_WriteCommand(0xA1); //设置左右方向，0xA1正常 0xA0左右反置
OLED_WriteCommand(0xC8); //设置上下方向，0xC8正常 0xC0上下反置
OLED_WriteCommand(0xDA); //设置COM引脚硬件配置
OLED_WriteCommand(0x12);
OLED_WriteCommand(0x81); //设置对比度控制
OLED_WriteCommand(0xCF);
OLED_WriteCommand(0xD9); //设置预充电周期
OLED_WriteCommand(0xF1);
OLED_WriteCommand(0xDB); //设置VCOMH取消选择级别
OLED_WriteCommand(0x30);
OLED_WriteCommand(0xA4); //设置整个显示打开/关闭
OLED_WriteCommand(0xA6); //设置正常/倒转显示
OLED_WriteCommand(0x8D); //设置充电泵
OLED_WriteCommand(0x14);
OLED_WriteCommand(0xAF); //开启显示
OLED_Clear(); //OLED清屏
}
/**main.c**/
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
int main(void)
{
/*模块初始化*/
OLED_Init(); //OLED初始化
/*OLED显示*/
OLED_ShowChar(1, 1, 'A'); //1行1列显示字符A
OLED_ShowString(1, 3, "HelloWorld!"); //1行3列显示字符串HelloWorld!
OLED_ShowNum(2, 1, 12345, 5); //2行1列显示十进制数字12345，长度为5
OLED_ShowSignedNum(2, 7, -66, 2); //2行7列显示有符号十进制数字-66，长度为2
OLED_ShowHexNum(3, 1, 0xAA55, 4); //3行1列显示十六进制数字0xA5A5，长度为4
OLED_ShowBinNum(4, 1, 0xAA55, 16); //4行1列显示二进制数字0xA5A5，长度为16
//C语言无法直接写出二进制数字，故需要用十六进制表示
while (1)
{
}
}
'; i++)
{
OLED_ShowChar(Line, Column + i, String[i]);
}
}
/**
* @brief OLED次方函数
* @retval 返回值等于X的Y次方
*/
uint32_t OLED_Pow(uint32_t X, uint32_t Y)
{
uint32_t Result = 1;
while (Y--)
{
Result *= X;
}
return Result;
}
void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i;
for (i = 0; i = 0)
{
OLED_ShowChar(Line, Column, '+');
Number1 = Number;
}
else
{
OLED_ShowChar(Line, Column, '-');
Number1 = -Number;
}
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i + 1, Number1 / OLED_Pow(10, Length - i - 1) % 10 + '0');
}
}
void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i, SingleNumber;
for (i = 0; i < Length; i++)
{
SingleNumber = Number / OLED_Pow(16, Length - i - 1) % 16;
if (SingleNumber < 10)
{
OLED_ShowChar(Line, Column + i, SingleNumber + '0');
}
else
{
OLED_ShowChar(Line, Column + i, SingleNumber - 10 + 'A');
}
}
}
void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
{
uint8_t i;
for (i = 0; i < Length; i++)
{
OLED_ShowChar(Line, Column + i, Number / OLED_Pow(2, Length - i - 1) % 2 + '0');
}
}
void OLED_Init(void)
{
uint32_t i, j;
for (i = 0; i < 1000; i++) //上电延时
{
for (j = 0; j < 1000; j++);
}
OLED_I2C_Init(); //端口初始化
OLED_WriteCommand(0xAE); //关闭显示
OLED_WriteCommand(0xD5); //设置显示时钟分频比/振荡器频率
OLED_WriteCommand(0x80);
OLED_WriteCommand(0xA8); //设置多路复用率
OLED_WriteCommand(0x3F);
OLED_WriteCommand(0xD3); //设置显示偏移
OLED_WriteCommand(0x00);
OLED_WriteCommand(0x40); //设置显示开始行
OLED_WriteCommand(0xA1); //设置左右方向，0xA1正常 0xA0左右反置
OLED_WriteCommand(0xC8); //设置上下方向，0xC8正常 0xC0上下反置
OLED_WriteCommand(0xDA); //设置COM引脚硬件配置
OLED_WriteCommand(0x12);
OLED_WriteCommand(0x81); //设置对比度控制
OLED_WriteCommand(0xCF);
OLED_WriteCommand(0xD9); //设置预充电周期
OLED_WriteCommand(0xF1);
OLED_WriteCommand(0xDB); //设置VCOMH取消选择级别
OLED_WriteCommand(0x30);
OLED_WriteCommand(0xA4); //设置整个显示打开/关闭
OLED_WriteCommand(0xA6); //设置正常/倒转显示
OLED_WriteCommand(0x8D); //设置充电泵
OLED_WriteCommand(0x14);
OLED_WriteCommand(0xAF); //开启显示
OLED_Clear(); //OLED清屏
}
/**main.c**/
#include "stm32f10x.h" // Device header
#include "Delay.h"
#include "OLED.h"
int main(void)
{
/*模块初始化*/
OLED_Init(); //OLED初始化
/*OLED显示*/
OLED_ShowChar(1, 1, 'A'); //1行1列显示字符A
OLED_ShowString(1, 3, "HelloWorld!"); //1行3列显示字符串HelloWorld!
OLED_ShowNum(2, 1, 12345, 5); //2行1列显示十进制数字12345，长度为5
OLED_ShowSignedNum(2, 7, -66, 2); //2行7列显示有符号十进制数字-66，长度为2
OLED_ShowHexNum(3, 1, 0xAA55, 4); //3行1列显示十六进制数字0xA5A5，长度为4
OLED_ShowBinNum(4, 1, 0xAA55, 16); //4行1列显示二进制数字0xA5A5，长度为16
//C语言无法直接写出二进制数字，故需要用十六进制表示
while (1)
{
}
}
