占空比：高电平占整个电平周期的持续时长，从而控制小灯的亮度，小灯亮度的控制需用定时器的输出比较功能。
PWM部分可以参考这篇文章
PWM——基于STM32F407ZGT6开发板-CSDN博客
此外我们还需要了解IIC的工作原理
1.pwm.c
#include "public.h"
/*
pwm控制led实现呼吸灯
1.看原理图确定GPIO以及定时器OC引脚 PF9 TIM14_CH1
2.GPIO配置
复用模式 GPIO_PinAFConfig
3.定时器配置
4.频道配置
a.申明结构体 TIM_OCInitTypeDef
b.结构体配置 模式、极性、输出使能
c.初始化（每个频道函数的下标不一样） TIM_OC1Init
5.定时器ARR寄存器与频道CCR寄存器使能
TIM_OC1PreloadConfig
TIM_ARRPreloadConfig
6.定时器使能
TIM_Cmd
7.修改占空比
调用TIM_SetCompare1
*/
void tim14_pwm_led0(uint16_t psc, uint32_t arr)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);//通电还是断电
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE); //时钟使能
GPIO_PinAFConfig(GPIOF, GPIO_PinSource9, GPIO_AF_TIM14); //复用为定时器14
//开始配置F端口下的9号跟10号引脚
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9; //led0 led1
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_AF; //复用模式
GPIO_InitStructure.GPIO_OType=GPIO_OType_PP; //推挽输出
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP; //上拉模式
GPIO_InitStructure.GPIO_Speed=GPIO_High_Speed; //引脚响应速度
GPIO_Init(GPIOF, &GPIO_InitStructure);
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; //向上计数
TIM_TimeBaseStructure.TIM_Prescaler = psc-1; //PSC值
TIM_TimeBaseStructure.TIM_Period = arr-1; //ARR值
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInit(TIM14, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //pwm模式1
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //输出使能
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性低
TIM_OC1Init(TIM14, &TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable); //使能TIM14在OC1上的CCR预装载寄存器
TIM_ARRPreloadConfig(TIM14, ENABLE); //定时器14 ARR寄存器
TIM_Cmd(TIM14, ENABLE); //定时器使能
}
//封装TIM_SetCompare1 - 固定定时器TIM14 - 方便传参只传一个
void PWM_SetCompare1(uint32_t Compare)
{
TIM_SetCompare1(TIM14,Compare);
}2.iic.c(注意这里用的软件iic)
#include "public.h"
/*
1.梳理IIC流程思路：时序图
2.代码封装
起始命令
终止命令
发送一个字节数绝
接收一个字节数据
应答与非应答
等待应答
IIC引脚初始化
IIC引脚切换
*/
void IICx_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//GPIO时钟
RCC_AHB1PeriphClockCmd(RCC_IIC_SCL, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_IIC_SDA, ENABLE);
//SCL GPIO初始化
GPIO_InitStructure.GPIO_Pin=IIC_SCL;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType=GPIO_OType_OD; //开漏输出
GPIO_InitStructure.GPIO_Speed=GPIO_High_Speed;
GPIO_Init(IIC_SCL_PORT, &GPIO_InitStructure);
//SDA GPIO初始化
GPIO_InitStructure.GPIO_Pin=IIC_SDA;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType=GPIO_OType_OD; //开漏输出
GPIO_InitStructure.GPIO_Speed=GPIO_High_Speed;
GPIO_Init(IIC_SDA_PORT, &GPIO_InitStructure);
IIC_SCL_H;
IIC_SDA_H;
}
//配置SDA数据线为输出
void IIC_SDA_OUT(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//SDA GPIO初始化
GPIO_InitStructure.GPIO_Pin=IIC_SDA;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType=GPIO_OType_OD; //开漏输出
GPIO_InitStructure.GPIO_Speed=GPIO_High_Speed;
GPIO_Init(IIC_SDA_PORT, &GPIO_InitStructure);
}
//配置SDA数据线为输入
void IIC_SDA_IN(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
//SDA GPIO初始化
GPIO_InitStructure.GPIO_Pin=IIC_SDA;
GPIO_InitStructure.GPIO_Mode= GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Speed=GPIO_High_Speed;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP; //上拉，仅对输入有效
GPIO_Init(IIC_SDA_PORT, &GPIO_InitStructure);
}
//IIC时序信号
//IIC开始信号
void IIC_Start(void)
{
IIC_SDA_OUT();
IIC_SCL_H;
IIC_SDA_H;
Delay_us(4);//让高电平保持稳定
IIC_SDA_L; // 拉低SDA
Delay_us(4);
IIC_SCL_L; //钳住IIC总线，准备发送或者接收数据
}
//IIC停止信号
void IIC_Stop(void)
{
IIC_SDA_OUT();
IIC_SCL_H;
IIC_SDA_L; //SAD低
Delay_us(4);//等待时序稳定
IIC_SDA_H; //SDA高
}
//IIC应答
void IIC_ACK(void)
{
IIC_SDA_OUT();
IIC_SCL_L; //在SCL低电平的时候，SDA可以进行数据切换（1和0切换）
IIC_SDA_L; //SDA低电平表示应答型号
Delay_us(1);//让电平稳定
IIC_SCL_H; //拉高SCL，表示此时SDA的数据有效
Delay_us(1);
IIC_SCL_L; //拉低SCL，表示SCL一个周期结束
}
//IIC非应答
void IIC_NACK(void)
{
IIC_SDA_OUT();
IIC_SCL_L; //在SCL低电平的时候，SDA可以进行数据切换（1和0切换）
IIC_SDA_H; //SDA高电平表示非应答型号
Delay_us(1);//让电平稳定
IIC_SCL_H; //拉高SCL，表示此时SDA的数据有效
Delay_us(1);
IIC_SCL_L; //拉低SCL，表示SCL一个周期结束
}
//IIC发送一个字节
void IIC_SendByte(uint8_t data)
{
IIC_SDA_OUT();
IIC_SCL_L; //在SCL低电平的时候，SDA可以进行数据切换（1和0切换）
uint8_t i=0;
for(i=0;i<8;i++)
{
if((data&0x80)>0) //0x80 1000 0000
{
IIC_SDA_H;
}
else
{
IIC_SDA_L;
}
IIC_SCL_H; //拉高SCL ，数据有效
Delay_us(1); //延时，将数据发送出去
IIC_SCL_L;
Delay_us(1);
data<<=1;
}
}
//IIC读取一个字节
uint8_t IIC_ReadByte(uint8_t ack) //ack 1 应答 0 非应答
{
IIC_SDA_IN();
uint8_t i=0;
uint8_t receive=0;
for(i=0;i<8;i++)
{
IIC_SCL_L;
Delay_us(1);
IIC_SCL_H;
receive<<=1;
if(READ_SDA)
{
receive++;
}
Delay_us(1);
}
if(ack)
IIC_ACK();
else
IIC_NACK();
return receive;
}
//IIC等待应答 ,返回0表示应答，返回1表示非应答
uint8_t IIC_WaitACK(void)
{
IIC_SDA_IN();
uint8_t temp=0;
IIC_SDA_H;
Delay_us(1);
IIC_SCL_H;
Delay_us(1);
while(READ_SDA)
{
temp++;
if(temp>250)
{
IIC_Stop();
return 1;
}
}
IIC_SCL_L;
return 0;
}3.iic.h
#ifndef __IIC_H
#define __IIC_H
#include "public.h"
//选择PE3和PE4 做为通讯引脚 PE3:SCL PE4：SDA
#define RCC_IIC_SCL RCC_AHB1Periph_GPIOE //端口时钟
#define IIC_SCL_PORT GPIOE //端口号
#define IIC_SCL GPIO_Pin_3 //引脚
#define RCC_IIC_SDA RCC_AHB1Periph_GPIOE
#define IIC_SDA_PORT GPIOE
#define IIC_SDA GPIO_Pin_4
//io操作
#define IIC_SCL_H GPIO_SetBits(IIC_SCL_PORT,IIC_SCL); //SCL置1
#define IIC_SCL_L GPIO_ResetBits(IIC_SCL_PORT,IIC_SCL);//SCL置0
#define IIC_SDA_H GPIO_SetBits(IIC_SDA_PORT,IIC_SDA); //SDA置1
#define IIC_SDA_L GPIO_ResetBits(IIC_SDA_PORT,IIC_SDA);//SDA置0
#define READ_SDA GPIO_ReadInputDataBit(IIC_SDA_PORT,IIC_SDA)//读取SDA输入引脚电平
void IICx_GPIO_Init(void);
void IIC_SDA_OUT(void);
void IIC_SDA_IN(void);
void IIC_Start(void);
void IIC_Stop(void);
void IIC_ACK(void);
void IIC_NACK(void);
void IIC_SendByte(uint8_t data);
uint8_t IIC_ReadByte(uint8_t ack);
uint8_t IIC_WaitACK(void);
uint16_t BH1750_ReadData(void);
#endif
4.oled.c(因为通信协议是IIC所以这里的OLED显示屏是四针脚的)
VCC接3.3V GND接板子上的GND SCK接PE3 SDA接PE4
/********************OLED屏幕操作函数***************************/
#include "public.h"
#include "oled_font.h"
void OLED_WriteCommand(uint8_t Command)
{
IIC_Start();
IIC_SendByte(0x78); //从机地址，并且写数据
IIC_WaitACK();
IIC_SendByte(0x00); //
IIC_WaitACK();
IIC_SendByte(Command); // 写入命令
IIC_WaitACK();
IIC_Stop();
}
void OLED_WriteData(uint8_t Data)
{
IIC_Start();
IIC_SendByte(0x78); //从机地址
IIC_WaitACK();
IIC_SendByte(0x40);
IIC_WaitACK();
IIC_SendByte(Data); // 写入命令
IIC_WaitACK();
IIC_Stop();
}
/**
* @brief OLED设置光标位置
* @param Y 以左上角为原点，向下方向的坐a'a'a'a'a'a'a'a'a'a'a'a'a'a'a'a'a'a'a标，范围：0~7
* @param X 以左上角为原点，向右方向的坐标，范围：0~127
* @retval 无
*/
void OLED_SetCursor(uint8_t Y, uint8_t X)
{
//协议规定
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
}
/**
* @brief OLED清屏
* @param 无
* @retval 无
*/
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);
}
}
}
/**
* @brief OLED显示一个字符
* @param Line 行位置，范围：1~4
* @param Column 列位置，范围：1~16
* @param Char 要显示的一个字符，范围：ASCII可见字符
* @retval 无
*/
void OLED_ShowCN(uint8_t Line, uint8_t Column, uint8_t Num)
{
uint8_t i;
uint8_t wide=20;//字宽
OLED_SetCursor((Line-1)*2, (Column-1)*wide); //参数1:把光标设置在第几页. 参数2:把光标设置在第几列
for (i = 0; i < wide; i++)
{
OLED_WriteData(OLED_F10x16[Num][i]); //显示上半部分内容
}
OLED_SetCursor((Line-1)*2+1,(Column-1)*wide);
for (i = 0; i < wide; i++)
{
OLED_WriteData(OLED_F10x16[Num][i+wide]); //显示下半部分内容
}
}
void OLED_ShowName(uint8_t Line, uint8_t Column, uint8_t Num)
{
uint8_t i;
uint8_t wide=16;//字宽
OLED_SetCursor((Line-1)*2, (Column-1)*wide); //参数1:把光标设置在第几页. 参数2:把光标设置在第几列
for (i = 0; i < wide; i++)
{
OLED_WriteData(OLED_F8x16_name[Num][i]); //显示上半部分内容
}
OLED_SetCursor((Line-1)*2+1,(Column-1)*wide);
for (i = 0; i < wide; i++)
{
OLED_WriteData(OLED_F8x16_name[Num][i+wide]); //显示下半部分内容
}
}
void OLED_ShowLight(uint8_t Line, uint8_t Column, uint8_t Num)
{
uint8_t i;
uint8_t wide=16;//字宽
OLED_SetCursor((Line-1)*2, (Column-1)*wide); //参数1:把光标设置在第几页. 参数2:把光标设置在第几列
for (i = 0; i < wide; i++)
{
OLED_WriteData(OLED_F8x16_light[Num][i]); //显示上半部分内容
}
OLED_SetCursor((Line-1)*2+1,(Column-1)*wide);
for (i = 0; i < wide; i++)
{
OLED_WriteData(OLED_F8x16_light[Num][i+wide]); //显示下半部分内容
}
}
void OLED_ShowLove(uint8_t Line, uint8_t Column)
{
uint8_t i;
uint8_t wide=8;//字宽
OLED_SetCursor((Line-1)*2, (Column-1)*wide); //参数1:把光标设置在第几页. 参数2:把光标设置在第几列
for (i = 0; i < wide; i++)
{
OLED_WriteData(Love_Heart0[i]); //显示空心
}
OLED_SetCursor((Line-1)*2 + 1, (Column-1)*wide);
for (i = 0; i < wide; i++)
{
OLED_WriteData(Love_Heart1[i]); //显示实心
}
}
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
}
}
/**
* @brief OLED显示字符串
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param String 要显示的字符串，范围：ASCII可见字符
* @retval 无
*/
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;
}
/**
* @brief OLED显示数字（十进制，正数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~4294967295
* @param Length 要显示数字的长度，范围：1~10
* @retval 无
*/
void OLED_ShowNum(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(10, Length - i - 1) % 10 + '0');
}
}
/**
* @brief OLED显示数字（十进制，带符号数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：-2147483648~2147483647
* @param Length 要显示数字的长度，范围：1~10
* @retval 无
*/
void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length)
{
uint8_t i;
uint32_t Number1;
if (Number >= 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');
}
}
/**
* @brief OLED显示数字（十六进制，正数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~0xFFFFFFFF
* @param Length 要显示数字的长度，范围：1~8
* @retval 无
*/
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');
}
}
}
/**
* @brief OLED显示数字（二进制，正数）
* @param Line 起始行位置，范围：1~4
* @param Column 起始列位置，范围：1~16
* @param Number 要显示的数字，范围：0~1111 1111 1111 1111
* @param Length 要显示数字的长度，范围：1~16
* @retval 无
*/
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');
}
}
/**
* @brief OLED初始化
* @param 无
* @retval 无
*/
void OLED_Init(void)
{
Delay_ms(100);
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
}5.oledfont.h(里面是字库)
#ifndef __OLED_FONT_H
#define __OLED_FONT_H
#include <stdint.h>
static unsigned char Love_Heart0[8]={0x1C,0x22,0x42,0x84,0x84,0x42,0x22,0x1C};/*"空心图形",0*/
static unsigned char Love_Heart1[8]={0x1C,0x3E,0x7E,0xFC,0xFC,0x7E,0x3E,0x1C};/*"实心图形",1*/
const uint8_t OLED_F8x16_light[][32]=
{
0x00,0x40,0x42,0x44,0x58,0x40,0x40,0x7F,0x40,0x40,0x50,0x48,0xC6,0x00,0x00,0x00,
0x00,0x40,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0xFF,0x00,0x00,0x00,/*"当",0*/
0x08,0x08,0xE8,0x29,0x2E,0x28,0xE8,0x08,0x08,0xC8,0x0C,0x0B,0xE8,0x08,0x08,0x00,
0x00,0x00,0xFF,0x09,0x49,0x89,0x7F,0x00,0x00,0x0F,0x40,0x80,0x7F,0x00,0x00,0x00,/*"前",1*/
0x40,0x40,0x42,0x44,0x58,0xC0,0x40,0x7F,0x40,0xC0,0x50,0x48,0x46,0x40,0x40,0x00,
0x80,0x80,0x40,0x20,0x18,0x07,0x00,0x00,0x00,0x3F,0x40,0x40,0x40,0x40,0x78,0x00,/*"光",2*/
0x00,0xFE,0x42,0x42,0x42,0xFE,0x00,0x42,0xA2,0x9E,0x82,0xA2,0xC2,0xBE,0x00,0x00,
0x80,0x6F,0x08,0x08,0x28,0xCF,0x00,0x00,0x2F,0xC8,0x08,0x08,0x28,0xCF,0x00,0x00,/*"照",3*/
0x02,0xE2,0x22,0x22,0x3E,0x00,0x80,0x9E,0x92,0x92,0xF2,0x92,0x92,0x9E,0x80,0x00,
0x00,0x43,0x82,0x42,0x3E,0x40,0x47,0x44,0x44,0x44,0x7F,0x44,0x44,0x54,0xE7,0x00,/*"强",4*/
0x00,0x00,0xFC,0x24,0x24,0x24,0xFC,0x25,0x26,0x24,0xFC,0x24,0x24,0x24,0x04,0x00,
0x40,0x30,0x8F,0x80,0x84,0x4C,0x55,0x25,0x25,0x25,0x55,0x4C,0x80,0x80,0x80,0x00,/*"度",5*/
};
/*OLED字模库，宽8像素，高16像素*/
const uint8_t OLED_F8x16[][16]=
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,// 0
0x00,0x00,0x00,0xF8,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x33,0x30,0x00,0x00,0x00,//! 1
0x00,0x10,0x0C,0x06,0x10,0x0C,0x06,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//" 2
0x40,0xC0,0x78,0x40,0xC0,0x78,0x40,0x00,
0x04,0x3F,0x04,0x04,0x3F,0x04,0x04,0x00,//# 3
0x00,0x70,0x88,0xFC,0x08,0x30,0x00,0x00,
0x00,0x18,0x20,0xFF,0x21,0x1E,0x00,0x00,//$ 4
0xF0,0x08,0xF0,0x00,0xE0,0x18,0x00,0x00,
0x00,0x21,0x1C,0x03,0x1E,0x21,0x1E,0x00,//% 5
0x00,0xF0,0x08,0x88,0x70,0x00,0x00,0x00,
0x1E,0x21,0x23,0x24,0x19,0x27,0x21,0x10,//& 6
0x10,0x16,0x0E,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//' 7
0x00,0x00,0x00,0xE0,0x18,0x04,0x02,0x00,
0x00,0x00,0x00,0x07,0x18,0x20,0x40,0x00,//( 8
0x00,0x02,0x04,0x18,0xE0,0x00,0x00,0x00,
0x00,0x40,0x20,0x18,0x07,0x00,0x00,0x00,//) 9
0x40,0x40,0x80,0xF0,0x80,0x40,0x40,0x00,
0x02,0x02,0x01,0x0F,0x01,0x02,0x02,0x00,//* 10
0x00,0x00,0x00,0xF0,0x00,0x00,0x00,0x00,
0x01,0x01,0x01,0x1F,0x01,0x01,0x01,0x00,//+ 11
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x80,0xB0,0x70,0x00,0x00,0x00,0x00,0x00,//, 12
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,//- 13
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x30,0x30,0x00,0x00,0x00,0x00,0x00,//. 14
0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x04,
0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00,/// 15
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,
0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00,//0 16
0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//1 17
0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,
0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00,//2 18
0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x00,
0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00,//3 19
0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,
0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00,//4 20
0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0x00,
0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00,//5 21
0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,
0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00,//6 22
0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x00,
0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00,//7 23
0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,
0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00,//8 24
0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,
0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00,//9 25
0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,
0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00,//: 26
0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x80,0x60,0x00,0x00,0x00,0x00,//; 27
0x00,0x00,0x80,0x40,0x20,0x10,0x08,0x00,
0x00,0x01,0x02,0x04,0x08,0x10,0x20,0x00,//< 28
0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x00,
0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x00,//= 29
0x00,0x08,0x10,0x20,0x40,0x80,0x00,0x00,
0x00,0x20,0x10,0x08,0x04,0x02,0x01,0x00,//> 30
0x00,0x70,0x48,0x08,0x08,0x08,0xF0,0x00,
0x00,0x00,0x00,0x30,0x36,0x01,0x00,0x00,//? 31
0xC0,0x30,0xC8,0x28,0xE8,0x10,0xE0,0x00,
0x07,0x18,0x27,0x24,0x23,0x14,0x0B,0x00,//@ 32
0x00,0x00,0xC0,0x38,0xE0,0x00,0x00,0x00,
0x20,0x3C,0x23,0x02,0x02,0x27,0x38,0x20,//A 33
0x08,0xF8,0x88,0x88,0x88,0x70,0x00,0x00,
0x20,0x3F,0x20,0x20,0x20,0x11,0x0E,0x00,//B 34
0xC0,0x30,0x08,0x08,0x08,0x08,0x38,0x00,
0x07,0x18,0x20,0x20,0x20,0x10,0x08,0x00,//C 35
0x08,0xF8,0x08,0x08,0x08,0x10,0xE0,0x00,
0x20,0x3F,0x20,0x20,0x20,0x10,0x0F,0x00,//D 36
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,
0x20,0x3F,0x20,0x20,0x23,0x20,0x18,0x00,//E 37
0x08,0xF8,0x88,0x88,0xE8,0x08,0x10,0x00,
0x20,0x3F,0x20,0x00,0x03,0x00,0x00,0x00,//F 38
0xC0,0x30,0x08,0x08,0x08,0x38,0x00,0x00,
0x07,0x18,0x20,0x20,0x22,0x1E,0x02,0x00,//G 39
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,
0x20,0x3F,0x21,0x01,0x01,0x21,0x3F,0x20,//H 40
0x00,0x08,0x08,0xF8,0x08,0x08,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//I 41
0x00,0x00,0x08,0x08,0xF8,0x08,0x08,0x00,
0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,0x00,//J 42
0x08,0xF8,0x88,0xC0,0x28,0x18,0x08,0x00,
0x20,0x3F,0x20,0x01,0x26,0x38,0x20,0x00,//K 43
0x08,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,
0x20,0x3F,0x20,0x20,0x20,0x20,0x30,0x00,//L 44
0x08,0xF8,0xF8,0x00,0xF8,0xF8,0x08,0x00,
0x20,0x3F,0x00,0x3F,0x00,0x3F,0x20,0x00,//M 45
0x08,0xF8,0x30,0xC0,0x00,0x08,0xF8,0x08,
0x20,0x3F,0x20,0x00,0x07,0x18,0x3F,0x00,//N 46
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,
0x0F,0x10,0x20,0x20,0x20,0x10,0x0F,0x00,//O 47
0x08,0xF8,0x08,0x08,0x08,0x08,0xF0,0x00,
0x20,0x3F,0x21,0x01,0x01,0x01,0x00,0x00,//P 48
0xE0,0x10,0x08,0x08,0x08,0x10,0xE0,0x00,
0x0F,0x18,0x24,0x24,0x38,0x50,0x4F,0x00,//Q 49
0x08,0xF8,0x88,0x88,0x88,0x88,0x70,0x00,
0x20,0x3F,0x20,0x00,0x03,0x0C,0x30,0x20,//R 50
0x00,0x70,0x88,0x08,0x08,0x08,0x38,0x00,
0x00,0x38,0x20,0x21,0x21,0x22,0x1C,0x00,//S 51
0x18,0x08,0x08,0xF8,0x08,0x08,0x18,0x00,
0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//T 52
0x08,0xF8,0x08,0x00,0x00,0x08,0xF8,0x08,
0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//U 53
0x08,0x78,0x88,0x00,0x00,0xC8,0x38,0x08,
0x00,0x00,0x07,0x38,0x0E,0x01,0x00,0x00,//V 54
0xF8,0x08,0x00,0xF8,0x00,0x08,0xF8,0x00,
0x03,0x3C,0x07,0x00,0x07,0x3C,0x03,0x00,//W 55
0x08,0x18,0x68,0x80,0x80,0x68,0x18,0x08,
0x20,0x30,0x2C,0x03,0x03,0x2C,0x30,0x20,//X 56
0x08,0x38,0xC8,0x00,0xC8,0x38,0x08,0x00,
0x00,0x00,0x20,0x3F,0x20,0x00,0x00,0x00,//Y 57
0x10,0x08,0x08,0x08,0xC8,0x38,0x08,0x00,
0x20,0x38,0x26,0x21,0x20,0x20,0x18,0x00,//Z 58
0x00,0x00,0x00,0xFE,0x02,0x02,0x02,0x00,
0x00,0x00,0x00,0x7F,0x40,0x40,0x40,0x00,//[ 59
0x00,0x0C,0x30,0xC0,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x01,0x06,0x38,0xC0,0x00,//\ 60
0x00,0x02,0x02,0x02,0xFE,0x00,0x00,0x00,
0x00,0x40,0x40,0x40,0x7F,0x00,0x00,0x00,//] 61
0x00,0x00,0x04,0x02,0x02,0x02,0x04,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//^ 62
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x80,//_ 63
0x00,0x02,0x02,0x04,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//` 64
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x19,0x24,0x22,0x22,0x22,0x3F,0x20,//a 65
0x08,0xF8,0x00,0x80,0x80,0x00,0x00,0x00,
0x00,0x3F,0x11,0x20,0x20,0x11,0x0E,0x00,//b 66
0x00,0x00,0x00,0x80,0x80,0x80,0x00,0x00,
0x00,0x0E,0x11,0x20,0x20,0x20,0x11,0x00,//c 67
0x00,0x00,0x00,0x80,0x80,0x88,0xF8,0x00,
0x00,0x0E,0x11,0x20,0x20,0x10,0x3F,0x20,//d 68
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x1F,0x22,0x22,0x22,0x22,0x13,0x00,//e 69
0x00,0x80,0x80,0xF0,0x88,0x88,0x88,0x18,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//f 70
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,
0x00,0x6B,0x94,0x94,0x94,0x93,0x60,0x00,//g 71
0x08,0xF8,0x00,0x80,0x80,0x80,0x00,0x00,
0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//h 72
0x00,0x80,0x98,0x98,0x00,0x00,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//i 73
0x00,0x00,0x00,0x80,0x98,0x98,0x00,0x00,
0x00,0xC0,0x80,0x80,0x80,0x7F,0x00,0x00,//j 74
0x08,0xF8,0x00,0x00,0x80,0x80,0x80,0x00,
0x20,0x3F,0x24,0x02,0x2D,0x30,0x20,0x00,//k 75
0x00,0x08,0x08,0xF8,0x00,0x00,0x00,0x00,
0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00,//l 76
0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,
0x20,0x3F,0x20,0x00,0x3F,0x20,0x00,0x3F,//m 77
0x80,0x80,0x00,0x80,0x80,0x80,0x00,0x00,
0x20,0x3F,0x21,0x00,0x00,0x20,0x3F,0x20,//n 78
0x00,0x00,0x80,0x80,0x80,0x80,0x00,0x00,
0x00,0x1F,0x20,0x20,0x20,0x20,0x1F,0x00,//o 79
0x80,0x80,0x00,0x80,0x80,0x00,0x00,0x00,
0x80,0xFF,0xA1,0x20,0x20,0x11,0x0E,0x00,//p 80
0x00,0x00,0x00,0x80,0x80,0x80,0x80,0x00,
0x00,0x0E,0x11,0x20,0x20,0xA0,0xFF,0x80,//q 81
0x80,0x80,0x80,0x00,0x80,0x80,0x80,0x00,
0x20,0x20,0x3F,0x21,0x20,0x00,0x01,0x00,//r 82
0x00,0x00,0x80,0x80,0x80,0x80,0x80,0x00,
0x00,0x33,0x24,0x24,0x24,0x24,0x19,0x00,//s 83
0x00,0x80,0x80,0xE0,0x80,0x80,0x00,0x00,
0x00,0x00,0x00,0x1F,0x20,0x20,0x00,0x00,//t 84
0x80,0x80,0x00,0x00,0x00,0x80,0x80,0x00,
0x00,0x1F,0x20,0x20,0x20,0x10,0x3F,0x20,//u 85
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,
0x00,0x01,0x0E,0x30,0x08,0x06,0x01,0x00,//v 86
0x80,0x80,0x00,0x80,0x00,0x80,0x80,0x80,
0x0F,0x30,0x0C,0x03,0x0C,0x30,0x0F,0x00,//w 87
0x00,0x80,0x80,0x00,0x80,0x80,0x80,0x00,
0x00,0x20,0x31,0x2E,0x0E,0x31,0x20,0x00,//x 88
0x80,0x80,0x80,0x00,0x00,0x80,0x80,0x80,
0x80,0x81,0x8E,0x70,0x18,0x06,0x01,0x00,//y 89
0x00,0x80,0x80,0x80,0x80,0x80,0x80,0x00,
0x00,0x21,0x30,0x2C,0x22,0x21,0x30,0x00,//z 90
0x00,0x00,0x00,0x00,0x80,0x7C,0x02,0x02,
0x00,0x00,0x00,0x00,0x00,0x3F,0x40,0x40,//{ 91
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,//| 92
0x00,0x02,0x02,0x7C,0x80,0x00,0x00,0x00,
0x00,0x40,0x40,0x3F,0x00,0x00,0x00,0x00,//} 93
0x00,0x06,0x01,0x01,0x02,0x02,0x04,0x04,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//~ 94
};
const uint8_t OLED_F10x16[][40]=
{
0x00,0x00,0x10,0x10,0x12,0xFE,0x90,0x10,0x10,0x7E,0x50,0x50,0x50,0x48,0x48,0x44,
0x44,0x70,0x40,0x00,0x00,0x02,0x02,0x42,0x41,0x3F,0x00,0x00,0x00,0x41,0x7E,0x2A,
0x2A,0x2A,0x2A,0x2A,0x7F,0x00,0x00,0x00,/*"指",0*/
0x00,0x40,0x60,0x50,0x48,0xC6,0x60,0x20,0x10,0x10,0xF0,0x12,0x1C,0x10,0x90,0x70,
0x10,0x18,0x10,0x00,0x00,0x20,0x24,0x26,0x15,0x94,0x52,0x52,0x40,0x20,0x20,0x13,
0x0C,0x1C,0x33,0x20,0x60,0x40,0x00,0x00,/*"纹",1*/
0x00,0x40,0x40,0x40,0x44,0x54,0x54,0x54,0x54,0xD4,0xD4,0x54,0x54,0x54,0x7C,0xC0,
0x40,0x40,0x40,0x00,0x00,0x20,0x20,0x10,0x10,0x13,0x0E,0x48,0x44,0x7F,0x3F,0x02,
0x04,0x0A,0x12,0x31,0x21,0x20,0x20,0x00,/*"录",2*/
0x00,0x00,0x00,0x00,0x00,0x00,0x02,0x04,0xC4,0x78,0x70,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x40,0x20,0x20,0x10,0x08,0x04,0x03,0x01,0x00,0x00,0x01,
0x03,0x0C,0x18,0x10,0x30,0x20,0x20,0x00,/*"入",3*/
0x00,0x80,0x80,0xFC,0x84,0xFC,0x84,0x80,0xFC,0x84,0x84,0xFC,0x80,0x80,0xF8,0x08,
0x00,0xFE,0x02,0x00,0x00,0x40,0x38,0x27,0x20,0x3F,0x40,0x38,0x47,0x40,0x40,0x3F,
0x00,0x00,0x0F,0x40,0x40,0x7F,0x00,0x00,/*"删",4*/
0x00,0x00,0xFC,0x04,0x64,0x94,0x8C,0x44,0x20,0x60,0x58,0x4C,0xC2,0x4C,0x50,0x70,
0x20,0x60,0x00,0x00,0x00,0x00,0x7F,0x04,0x08,0x08,0x47,0x20,0x12,0x0E,0x42,0xC2,
0x7F,0x02,0x02,0x0A,0x12,0x22,0x00,0x00,/*"除",5*/
};
#endif6.BH1750.c (SCL接PB6、SDA接PB7、ADDR接高电平3.3v)
#include "public.h"
#define BH1750_ADDR_H 0x5C
#define BH1750_ADDR_L 0x23
#define BH1750_POWER_ON 0x01
#define BH1750_POWER_OFF 0x00
#define BH1750_RESET 0x07
//PB6 PB7初始化
static void IIC_hardware_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能模式
GPIO_InitStructure.GPIO_Speed = GPIO_Fast_Speed;//速度
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;//开漏输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;//高低电平
GPIO_Init(GPIOB,&GPIO_InitStructure);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_I2C1);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_I2C1); //复用为IIC
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_ClockSpeed = 100000;
I2C_InitStructure.I2C_OwnAddress1 = 0x00; //主机地址
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_Init(I2C1,&I2C_InitStructure);
I2C_Cmd(I2C1,ENABLE);
}
static void IIC_hardward_write(uint8_t data)
{
//1.判断硬件总线状态，是否繁忙
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));
//2.发送起始信号
I2C_GenerateSTART(I2C1,ENABLE);
//3.等待EV5，确保IIC开始信号已经发出
while(!(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT)));
//4.发送设备地址和方向
I2C_Send7bitAddress(I2C1,BH1750_ADDR_L<<1 | 0,I2C_Direction_Transmitter);
//5.等待EV6，确保地址和方向位已经发出
while(!(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)));
//6.发送数据
I2C_SendData(I2C1,data);
//7.等待EV8，确保数据寄存器DR为空，数据已经发送
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_TRANSMITTING));
//8.应答信号使能
//I2C_AcknowledgeConfig(I2C1,ENABLE);
//9.结束信号
I2C_GenerateSTOP(I2C1,ENABLE);
}
uint16_t IIC_hardware_read(void)
{
uint8_t H_rev;
uint8_t L_rev;
uint16_t rev_data;
//1.判断硬件总线状态，是否繁忙
while(I2C_GetFlagStatus(I2C1,I2C_FLAG_BUSY));
//2.发送起始信号
I2C_GenerateSTART(I2C1,ENABLE);
//3.等待EV5，确保IIC开始信号已经发出
//逻辑是函数若检测到EV5发生会返回布尔值1，不断循环直到检测到EV5发生然后取反为0跳出循环
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_MODE_SELECT));
//4.发送设备地址和方向
I2C_Send7bitAddress(I2C1,BH1750_ADDR_L<<1|1,I2C_Direction_Receiver);
//5.等待EV6，确保地址和方向位已经发出
while(!(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)));
//6.产生应答信号
I2C_AcknowledgeConfig(I2C1,ENABLE);
//7.等待EV7，确保可以接收数据
while(!I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED));
//接收数据高8位
H_rev= I2C_ReceiveData(I2C1);
//应答信号使能
I2C_AcknowledgeConfig(I2C1,ENABLE);
//8.等待EV7，确保可以接收数据
while(!(I2C_CheckEvent(I2C1,I2C_EVENT_MASTER_BYTE_RECEIVED)));
//接收数据低8位
L_rev= I2C_ReceiveData(I2C1);
//非应答信号使能
I2C_AcknowledgeConfig(I2C1,DISABLE);
//9.停止信号
I2C_GenerateSTOP(I2C1, ENABLE);
rev_data = ((uint16_t)H_rev<<8) + L_rev;
return rev_data;
}
//bh1750驱动
void bh1750_init()
{
IIC_hardware_init();
Delay_ms(500);
IIC_hardward_write(BH1750_POWER_OFF); //断电
IIC_hardward_write(BH1750_POWER_ON); //通电
IIC_hardward_write(BH1750_RESET); //重置
IIC_hardward_write(0x11); //分辨率H2
}
float get_light_value(void)
{
return (float)(IIC_hardware_read() / 1.2);
}7.main.c
#include "public.h"
/*
1. GPIO口软件模拟IIC时序，实现IIC通讯
2. 跟OLED屏幕通讯
3. 跟BH1750光照模块通讯，获取光照信息并打印输出
4. 调用PWM函数接口，调整小灯的占空比，实现路灯效果
*/
int main(void)
{
SysTick_Init();
USART_Init_Config();
IICx_GPIO_Init();
OLED_Init();
bh1750_init();
tim14_pwm_led0(84, 1000);
int i;
for(i = 0;i < 6; i++)
{
OLED_ShowLight(1,i+1,i);
}
OLED_ShowString(1,13,":");
float data;
while(1)
{
data = get_light_value();
//printf("%f ",data);
OLED_ShowNum(2,1,data,4);
if(data>300)//环境光亮，让灯灭
{
PWM_SetCompare1(0);
Delay_ms(1);
continue;
}
else if(data < 300)//环境光暗，让灯亮
{
PWM_SetCompare1(1000 - data);
}
Delay_ms(1);
}
}正确编译并烧录到板子上
8.效果如下
<iframe allowfullscreen="true" data-mediaembed="csdn" frameborder="0" id="R1DzeRI2-1724938069119" src="https://live.csdn.net/v/embed/420934"></iframe>video_20240829_205715_edit
标签：BH1750,0x08,STM32F407ZGT6,光照强度,0x20,0x00,0x80,IIC,GPIO From： https://blog.csdn.net/luckyluckypolar/article/details/141687548