STM32日历读取，设置和输出——实时时钟RTC

实时时钟。RTC是个独立的定时器。RTC模块拥有一个连续计数的计数器，在相应的软件配置下，可以提供时钟日历的功能。修改计数器的值可以重新设置当前时间和日期 RTC还包含用于管理低功耗模式的自动唤醒单元。在断电情况下 RTC仍可以独立运行只要芯片的备用电源一直供电,RTC上的时间会一直走。RTC实质是一个掉电后还继续运行的定时器,从定时器的角度来看,相对于通用定时器TIM外设,它的功能十分简单,只

学叶

1732人浏览 · 2023-11-22 13:33:39

学叶 · 2023-11-22 13:33:39 发布

三、搭建STM32开发环境（HAL库环境）

四、利用HAL库新建第一小问的工程（串口显示工程）

五、完善 keil5工程

六、第一小问工程烧录运行

七、利用库函数搭建第二小问工程（OLED显示工程）

1、关于如何搭建STM32库函数环境与库函数工程：

2、完善keil5工程--->编写工程代码：

一、问题导出

阅读资料了解 STM32F103的RTC（实时时钟）原理，使用带SPI或IIC接口的OLED屏显模块实现以下功能：

1) 读取STM32F103C8T6 内部的时钟(年月日时分秒)，日历(星期x），1秒周期，通过串口输出到PC上位机，；

2) 读取AHT20的温度和湿度，通过OLED，把年月份时分秒、日历和实时温度、湿度显示出来，2秒周期。

二、 RTC简介

2.1、RTC介绍：

RTC (Real Time Clock)：实时时钟。RTC是个独立的定时器。RTC模块拥有一个连续计数的计数器，在相应的软件配置下，可以提供时钟日历的功能。修改计数器的值可以重新设置当前时间和日期 RTC还包含用于管理低功耗模式的自动唤醒单元。

在断电情况下 RTC仍可以独立运行只要芯片的备用电源一直供电,RTC上的时间会一直走。RTC实质是一个掉电后还继续运行的定时器,从定时器的角度来看,相对于通用定时器TIM外设,它的功能十分简单,只有计时功能(也可以触发中断)。但其高级指出也就在于掉电之后还可以正常运行。

两个 32 位寄存器包含二进码十进数格式 (BCD) 的秒、分钟、小时（ 12 或 24 小时制）、星期几、日期、月份和年份。此外，还可提供二进制格式的亚秒值。系统可以自动将月份的天数补偿为 28、29（闰年）、30 和 31 天。

上电复位后，所有RTC寄存器都会受到保护，以防止可能的非正常写访问。无论器件状态如何（运行模式、低功耗模式或处于复位状态），只要电源电压保持在工作范围内，RTC使不会停止工作。

2.2、RTC特征：

可编程的预分频系数：分频系数高为220。
32位的可编程计数器，可用于较长时间段的测量。
2个分离的时钟：用于APB1接口的PCLK1和RTC时钟(RTC时钟的频率必须小于PCLK1时钟频率的四分之一以上)。
可以选择以下三种RTC的时钟源：
- HSE时钟除以128；
- LSE振荡器时钟；
- SI振荡器时钟
2个独立的复位类型：
- APB1接口由系统复位；
- RTC核心(预分频器、闹钟、计数器和分频器)只能由后备域复位
3个专门的可屏蔽中断：
- 1.闹钟中断，用来产生一个软件可编程的闹钟中断
- 2.秒中断，用来产生一个可编程的周期性中断信号(长可达1秒)。
- 3.溢出中断，指示内部可编程计数器溢出并回转为0的状态。
RTC时钟源：
三种不同的时钟源可被用来驱动系统时钟(SYSCLK)：
- HSI振荡器时钟
- HSE振荡器时钟
- PLL时钟
这些设备有以下2种二级时钟源：
- 40kHz低速内部RC，可以用于驱动独立看门狗和通过程序选择驱动RTC。 RTC用于从停机/待机模式下自动唤醒系统。
- 32.768kHz低速外部晶体也可用来通过程序选择驱动RTC(RTCCLK)。

2.3、RTC原理框图：

RTC时钟的框图是比较简单的，这里我们把他分成两个部分:

（1）APB1 接口： 用来和 APB1 总线相连。此单元还包含一组 16 位寄存器，可通过 APB1 总线对其进行读写操作。APB1 接口由 APB1 总线时钟驱动，用来与 APB1 总线连接。通过APB1接口可以访问RTC的相关寄存器（预分频值，计数器值，闹钟值）。

（2）RTC 核心接口：由一组可编程计数器组成，分成两个主要模块：

——第一个模块是 RTC 的预分频模块 ，它可编程产生 1 秒的 RTC 时间基准 TR_CLK。RTC 的预分频模块包含了一个 20 位的可编程分频器(RTC 预分频器)。如果在 RTC_CR 寄存器中设置了相应的允许位，则在每个 TR_CLK 周期中 RTC 产生一个中断(秒中断)。

——第二个模块是一个 32 位的可编程计数器（RTC_CNT），可被初始化为当前的系统时间，一个 32 位的时钟计数器，按秒钟计算，可以记录 4294967296 秒，约合 136 年左右，作为一般应用，这已经是足够了的。

2.4、RTC结构：

RTC时钟主要由两个内部低速时钟和一个外部高速时钟构成。基本结构如下：

硬件电路原理图如下：

RTC（Real Time Clock）实时时钟是一种高精度、低功耗的定时器，它可以在各种环境下提供精确的时间和日期信息。即使在系统处于低功耗模式时，RTC也可以继续运行，确保时间的连续性。此外，它还支持时钟校准功能，可以校正时钟的偏差，保证时间的准确性。除了基本的时间提供功能，RTC还具有报警功能，用户可以设置报警功能，当达到指定时间时触发中断，这在实际应用中非常有用。例如，可以在系统到达预定维护时间时触发警报，提醒用户进行维护操作。

另外，RTC还支持外部电池备份，用户可以使用外部电池进行时间备份，即使在断电的情况下也能保持时间的准确。这一特性使得RTC在某些应用场景下特别适用，例如在应急照明系统、安全监控系统等需要持续、准确计时的情况下。

RTC还具有自动唤醒功能，用户可以根据需要设置自动唤醒条件，当满足预设条件时自动唤醒系统。这一功能在许多嵌入式系统和物联网设备中非常有用，可以大大降低系统的功耗。

2.5、RTC具体流程：

RTCCLK经过RTC_DIV预分频，RTC_PRL设置预分频系数，然后得到TR_CLK时钟信号，我们一般设置其周期为1s，RTC_CNT计数器计数，假如1970设置为时间起点为0s，通过当前时间的秒数计算得到当前的时间。RTC_ALR是设置闹钟时间，RTC_CNT计数到RTC_ALR就会产生计数中断。RTC_Second为秒中断，用于刷新时间；RTC_Overflow是溢出中断；RTC Alarm 控制开关机。

2.6、RTC时钟选择：

使用HSE分频时钟或者LSI的时候,在主电源VDD掉电的情况下,这两个时钟来源都会受到影响,因此没法保证RTC正常工作.所以RTC一般都时钟低速外部时钟LSE,频率为实时时钟模块中常用的32.768KHz,因为32768 = 2^15,分频容易实现,所以被广泛应用到RTC模块.(在主电源VDD有效的情况下待机,RTC还可以配置闹钟事件使STM32退出待机模式)。

2.7、RTC复位过程：

除了RTC_PRL、RTC_ALR、RTC_CNT和RTC_DIV寄存器外，所有的系统寄存器都由系统复位或电源复位进行异步复位。RTC_PRL、RTC_ALR、RTC_CNT和RTC_DIV寄存器仅能通过备份域复位信号复位。系统复位后,禁止访问后备寄存器和RCT,防止对后卫区域(BKP)的意外写操作。

2.8、RTC中断：

（1）秒中断：
这里时钟自带一个秒中断，每当计数加一的时候就会触发一次秒中断，。注意，这里所说的秒中断并非一定是一秒的时间，它是由RTC时钟源和分频值决定的“秒”的时间，当然也是可以做到1秒钟中断一次。我们通过往秒中断里写更新时间的函数来达到时间同步的效果

（2）闹钟中断：
闹钟中断就是设置一个预设定的值，计数每自加多少次触发一次闹钟中断

三、搭建STM32开发环境（HAL库环境）

请参考我的这篇博客：STM32使用HAL库点亮流水灯-CSDN博客

四、利用HAL库新建第一小问的工程（串口显示工程）

（1）打开STM32CubeMX，在主界面点击：ACCESS TO MCU SELECTOR:

（2）选择的单片机型号以及点击开始工程项目：

（3）点击system core，进入SYS，在debug下选择serial wire：

（4）配置RCC，（设置高速外部时钟，使能外部晶振LSE）：

（5）配置RTC（激活时钟源(Activate Clock Source)和日历(Activate Calendar)），进入RTC，设置时间为创建时间2023/11/15/ 17:14：

接着：

（6）配置USART1，我们使用USART1进行数据传输：

（7）进入CLK Configuration (时钟配置)中，进行时钟配置：

（8）进入Project Manager(工程管理)，进行工程设置点击生成工程与代码。注意：路径不能包含中文和空格，不然生成的工程文件无法在Keil中打开：

五、完善 keil5工程

1、头文件添加#include “stdio.h”：
在这里插入图片描述

2、在main.c文件中重写fputc函数，完成printf函数的重定向：

//添加头文件#include "stdio.h"
int fputc(int ch,FILE *f){
 uint8_t temp[1]={ch};
 HAL_UART_Transmit(&huart1,temp,1,2);
 return ch;
}

3、在main.c中定义时间和日期的结构体用来获取时间和日期：

RTC_DateTypeDef GetData;  //获取日期结构体

RTC_TimeTypeDef GetTime;   //获取时间结构体

4、在main函数中while循环里面添加如下代码即可：

/* Get the RTC current Time */
	    HAL_RTC_GetTime(&hrtc, &GetTime, RTC_FORMAT_BIN);
      /* Get the RTC current Date */
      HAL_RTC_GetDate(&hrtc, &GetData, RTC_FORMAT_BIN);

      /* Display date Format : yy/mm/dd */
      printf("%02d/%02d/%02d\r\n",2000 + GetData.Year, GetData.Month, GetData.Date);
	  /* Display date Format : weekday */
		if(GetData.WeekDay==1){
			printf("星期一\r\n");
		}else if(GetData.WeekDay==2){
			printf("星期二\r\n");
		}else if(GetData.WeekDay==3){
			printf("星期三\r\n");
		}else if(GetData.WeekDay==4){
			printf("星期四\r\n");
		}else if(GetData.WeekDay==5){
			printf("星期五\r\n");
		}else if(GetData.WeekDay==6){
			printf("星期六\r\n");
		}else if(GetData.WeekDay==7){
			printf("星期日\r\n");
		}

      /* Display time Format : hh:mm:ss */
      printf("%02d:%02d:%02d\r\n",GetTime.Hours, GetTime.Minutes, GetTime.Seconds);

      printf("\r\n");

      HAL_Delay(1000);

5、因为我们在代码里面重写了printf，所以在Target里面一定要勾选上Use MiscroLiB：

六、第一小问工程烧录运行

1、USB转TTL与STM32的连线，以及电脑上配置CH340等等烧录环境，请参考我的这篇博客：

STM32使用HAL库中断控制串口通信-CSDN博客

2、编译与烧录，如何通过USB转TTL烧录进STM32中，也参考我的同一篇博客：

STM32使用HAL库中断控制串口通信-CSDN博客

3、工程运行结果展示：

七、利用库函数搭建第二小问工程（OLED显示工程）

1、关于如何搭建STM32库函数环境与库函数工程：

请参考我的这篇博客：

基于标准外设库的LED流水灯-CSDN博客

2、完善keil5工程--->编写工程代码：

（1）提醒：

关于如何在keil里面通过库函数创建并且编写C文件与H文件，以及把它们都导入进库函数keil5工程中，还是参考我的这篇博客：基于标准外设库的LED流水灯-CSDN博客

（2）编写工程需要的文件代码：

（1：sys.h与sys.c文件代码编写：
sys.h:

#ifndef __SYS_H
#define __SYS_H	
#include "stm32f10x.h"
//	 


//STM32F103o?D?°?ày3ì
//?aoˉêy°?±?ày3ì
/********** mcudev.taobao.com 3??·  ********/



// 	 

//0,2??§3?ucos
//1,?§3?ucos
#define SYSTEM_SUPPORT_UCOS		0		//?¨ò??μí3???t?Dê?·??§3?UCOS
																	    
	 
//??′?2ù×÷,êμ??51àà??μ?GPIO????1|?ü
//??ì?êμ??????,2???<<CM3è¨ít????>>μú????(87ò3~92ò3).
//IO?ú2ù×÷oê?¨ò?
#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2)) 
#define MEM_ADDR(addr)  *((volatile unsigned long  *)(addr)) 
#define BIT_ADDR(addr, bitnum)   MEM_ADDR(BITBAND(addr, bitnum)) 
//IO?úμ??·ó3é?
#define GPIOA_ODR_Addr    (GPIOA_BASE+12) //0x4001080C 
#define GPIOB_ODR_Addr    (GPIOB_BASE+12) //0x40010C0C 
#define GPIOC_ODR_Addr    (GPIOC_BASE+12) //0x4001100C 
#define GPIOD_ODR_Addr    (GPIOD_BASE+12) //0x4001140C 
#define GPIOE_ODR_Addr    (GPIOE_BASE+12) //0x4001180C 
#define GPIOF_ODR_Addr    (GPIOF_BASE+12) //0x40011A0C    
#define GPIOG_ODR_Addr    (GPIOG_BASE+12) //0x40011E0C    

#define GPIOA_IDR_Addr    (GPIOA_BASE+8) //0x40010808 
#define GPIOB_IDR_Addr    (GPIOB_BASE+8) //0x40010C08 
#define GPIOC_IDR_Addr    (GPIOC_BASE+8) //0x40011008 
#define GPIOD_IDR_Addr    (GPIOD_BASE+8) //0x40011408 
#define GPIOE_IDR_Addr    (GPIOE_BASE+8) //0x40011808 
#define GPIOF_IDR_Addr    (GPIOF_BASE+8) //0x40011A08 
#define GPIOG_IDR_Addr    (GPIOG_BASE+8) //0x40011E08 
 
//IO?ú2ù×÷,????μ￥ò?μ?IO?ú!
//è·±￡nμ??μD?óú16!
#define PAout(n)   BIT_ADDR(GPIOA_ODR_Addr,n)  //ê?3? 
#define PAin(n)    BIT_ADDR(GPIOA_IDR_Addr,n)  //ê?è? 

#define PBout(n)   BIT_ADDR(GPIOB_ODR_Addr,n)  //ê?3? 
#define PBin(n)    BIT_ADDR(GPIOB_IDR_Addr,n)  //ê?è? 

#define PCout(n)   BIT_ADDR(GPIOC_ODR_Addr,n)  //ê?3? 
#define PCin(n)    BIT_ADDR(GPIOC_IDR_Addr,n)  //ê?è? 

#define PDout(n)   BIT_ADDR(GPIOD_ODR_Addr,n)  //ê?3? 
#define PDin(n)    BIT_ADDR(GPIOD_IDR_Addr,n)  //ê?è? 

#define PEout(n)   BIT_ADDR(GPIOE_ODR_Addr,n)  //ê?3? 
#define PEin(n)    BIT_ADDR(GPIOE_IDR_Addr,n)  //ê?è?

#define PFout(n)   BIT_ADDR(GPIOF_ODR_Addr,n)  //ê?3? 
#define PFin(n)    BIT_ADDR(GPIOF_IDR_Addr,n)  //ê?è?

#define PGout(n)   BIT_ADDR(GPIOG_ODR_Addr,n)  //ê?3? 
#define PGin(n)    BIT_ADDR(GPIOG_IDR_Addr,n)  //ê?è?



void NVIC_Configuration(void);



#endif

sys.c:

#include "sys.h"


//STM32F103o?D?°?ày3ì
//?aoˉêy°?±?ày3ì
/********** mcudev.taobao.com 3??·  ********/

//	 

//STM32?a·￠°?
//?μí3?D??·?×ééè???ˉ		   

//********************************************************************************  
void NVIC_Configuration(void)
{

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);	//éè??NVIC?D??·?×é2:2???à??ó??è??￡?2???ìó|ó??è??

}

(2:Timer.h与Timer.c文件编写:

Timer.h:

#ifndef __TIMER_H
#define __TIMER_H

void Timer_Init(void);

#endif

Timer.c:

#include "stm32f10x.h"                  // Device header


TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
void Timer_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
	
	TIM_InternalClockConfig(TIM2);
	

	TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
	TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInitStructure.TIM_Period = 10000 - 1;
	TIM_TimeBaseInitStructure.TIM_Prescaler = 3600 - 1;
	TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;
	TIM_TimeBaseInit(TIM2, &TIM_TimeBaseInitStructure);
	
	TIM_ClearFlag(TIM2, TIM_FLAG_Update);
	TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);
	
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	
	
	NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_Init(&NVIC_InitStructure);
	
	TIM_Cmd(TIM2, ENABLE);
}

/*
void TIM2_IRQHandler(void)
{
	if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)
	{
		
		TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
	}
}
*/

(3:MyRTC.h与MyRTC.c文件编写:

MyRTC.h:

#ifndef __MYRTC_H
#define __MYRTC_H

extern uint16_t MyRTC_Time[];

void MyRTC_Init(void);
void MyRTC_SetTime(void);
void MyRTC_ReadTime(void);

#endif

MyRTC.c:

#include "stm32f10x.h"                  // Device header
#include <time.h>
#include "OLED.h"
#include "delay.h"

uint16_t MyRTC_Time[] = {2023, 11, 21, 21, 51, 05};

void MyRTC_SetTime(void);


char* weekday;
uint16_t iWeek;

void CalculateWeekDay(uint16_t year, uint16_t month, uint16_t day) {
	if (month == 1 || month ==2) 
    {
        month +=12;
        year--;
    }
	iWeek = (day + 2 * month + 3 * (month + 1)/5 + year + year/4 - year/100 + year/400) % 7;
	switch (iWeek)
    {
		case 0: weekday = "Monday"; break;
     	case 1: weekday = "Teusday"; break;
     	case 2: weekday = "Wednesday"; break;
     	case 3: weekday = "Thursday"; break;
     	case 4: weekday = "Friday"; break;
     	case 5: weekday = "Saturday"; break;
     	case 6: weekday = "Sunday"; break;
	}
}



void MyRTC_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP, ENABLE);
	
	PWR_BackupAccessCmd(ENABLE);
	
	if (BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)
	{
		RCC_LSEConfig(RCC_LSE_ON);
		while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) != SET);
		
		RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
		RCC_RTCCLKCmd(ENABLE);
		
		RTC_WaitForSynchro();
		RTC_WaitForLastTask();
		
		RTC_SetPrescaler(32768 - 1);
		RTC_WaitForLastTask();
		
		MyRTC_SetTime();
		
		BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
	}
	else
	{
		RTC_WaitForSynchro();
		RTC_WaitForLastTask();
	}
}

//如果LSE无法起振导致程序卡死在初始化函数中
//可将初始化函数替换为下述代码，使用LSI当作RTCCLK
//LSI无法由备用电源供电，故主电源掉电时，RTC走时会暂停
/* 
void MyRTC_Init(void)
{
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_BKP, ENABLE);
	
	PWR_BackupAccessCmd(ENABLE);
	
	if (BKP_ReadBackupRegister(BKP_DR1) != 0xA5A5)
	{
		RCC_LSICmd(ENABLE);
		while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) != SET);
		
		RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
		RCC_RTCCLKCmd(ENABLE);
		
		RTC_WaitForSynchro();
		RTC_WaitForLastTask();
		
		RTC_SetPrescaler(40000 - 1);
		RTC_WaitForLastTask();
		
		MyRTC_SetTime();
		
		BKP_WriteBackupRegister(BKP_DR1, 0xA5A5);
	}
	else
	{
		RCC_LSICmd(ENABLE);
		while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) != SET);
		
		RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
		RCC_RTCCLKCmd(ENABLE);
		
		RTC_WaitForSynchro();
		RTC_WaitForLastTask();
	}
}*/

void MyRTC_SetTime(void)
{
	time_t time_cnt;
	struct tm time_date;
	
	time_date.tm_year = MyRTC_Time[0] - 1900;
	time_date.tm_mon = MyRTC_Time[1] - 1;
	time_date.tm_mday = MyRTC_Time[2];
	time_date.tm_hour = MyRTC_Time[3];
	time_date.tm_min = MyRTC_Time[4];
	time_date.tm_sec = MyRTC_Time[5];
	
	time_cnt = mktime(&time_date) - 8 * 60 * 60;
	
	RTC_SetCounter(time_cnt);
	RTC_WaitForLastTask();
}

void MyRTC_ReadTime(void)
{
	time_t time_cnt;
	struct tm time_date;
	
	time_cnt = RTC_GetCounter() + 8 * 60 * 60;//
	
	time_date = *localtime(&time_cnt);
	
	MyRTC_Time[0] = time_date.tm_year + 1900;
	MyRTC_Time[1] = time_date.tm_mon + 1;
	MyRTC_Time[2] = time_date.tm_mday;
	MyRTC_Time[3] = time_date.tm_hour;
	MyRTC_Time[4] = time_date.tm_min;
	MyRTC_Time[5] = time_date.tm_sec;
	
	CalculateWeekDay(MyRTC_Time[0], MyRTC_Time[1], MyRTC_Time[2]);
	
	//delay_ms(10);
	OLED_ShowNum(3, 1, MyRTC_Time[0], 4);
	OLED_ShowChar(3, 5, '-');
	OLED_ShowNum(3, 6, MyRTC_Time[1], 2);
	OLED_ShowChar(3, 8, '-');
	OLED_ShowNum(3, 9, MyRTC_Time[2], 2);
	
	OLED_ShowNum(4, 1, MyRTC_Time[3], 2);
	OLED_ShowChar(4, 3, ':');
	OLED_ShowNum(4, 4, MyRTC_Time[4], 2);
	OLED_ShowChar(4, 6, ':');
	OLED_ShowNum(4, 7, MyRTC_Time[5], 2);
	
	OLED_ShowString(4, 10, weekday);

}

(4:OLED.h与OLED.c文件编写:

OLED.h:

#ifndef __OLED_H
#define __OLED_H

void OLED_Init(void);
void OLED_Clear(void);
void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char);
void OLED_ShowString(uint8_t Line, uint8_t Column, char *String);
void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length);
void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);

#endif

OLED.c:

#include "bsp_i2c.h"
#include "delay.h"
#include "OLED.h"

uint8_t   ack_status=0;
uint8_t   readByte[6];
uint8_t   AHT20_status=0;

uint32_t  H1=0;  //Humility
uint32_t  T1=0;  //Temperature

uint8_t  AHT20_OutData[4];
uint8_t  AHT20sendOutData[10] = {0xFA, 0x06, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF};

void IIC_Init(void)
{					     
	GPIO_InitTypeDef GPIO_InitStructure;
	RCC_APB2PeriphClockCmd(	RCC_APB2Periph_GPIOB, ENABLE );	
	   
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ;   //í?íìê?3?
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
 
	IIC_SCL=1;
	IIC_SDA=1;
 
}
//2úéúIIC?eê?D?o?
void IIC_Start(void)
{
	SDA_OUT();     //sda??ê?3?
	IIC_SDA=1;	  	  
	IIC_SCL=1;
	delay_us(4);
 	IIC_SDA=0;//START:when CLK is high,DATA change form high to low 
	delay_us(4);
	IIC_SCL=0;//?ˉ×?I2C×ü??￡?×?±?·￠?í?ò?óê?êy?Y 
}	  
//2úéúIICí￡?1D?o?
void IIC_Stop(void)
{
	SDA_OUT();//sda??ê?3?
	IIC_SCL=0;
	IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
 	delay_us(4);
	IIC_SCL=1; 
	IIC_SDA=1;//·￠?íI2C×ü???áê?D?o?
	delay_us(4);							   	
}
//μè′yó|′eD?o?μ?à′
//·μ???μ￡o1￡??óê?ó|′eê§°ü
//        0￡??óê?ó|′e3é1|
u8 IIC_Wait_Ack(void)
{
	u8 ucErrTime=0;
	SDA_IN();      //SDAéè???aê?è?  
	IIC_SDA=1;delay_us(1);	   
	IIC_SCL=1;delay_us(1);	 
	while(READ_SDA)
	{
		ucErrTime++;
		if(ucErrTime>250)
		{
			IIC_Stop();
			return 1;
		}
	}
	IIC_SCL=0;//ê±?óê?3?0 	   
	return 0;  
} 
//2úéúACKó|′e
void IIC_Ack(void)
{
	IIC_SCL=0;
	SDA_OUT();
	IIC_SDA=0;
	delay_us(2);
	IIC_SCL=1;
	delay_us(2);
	IIC_SCL=0;
}
//2?2úéúACKó|′e		    
void IIC_NAck(void)
{
	IIC_SCL=0;
	SDA_OUT();
	IIC_SDA=1;
	delay_us(2);
	IIC_SCL=1;
	delay_us(2);
	IIC_SCL=0;
}					 				     
//IIC·￠?íò???×??ú
//·μ??′ó?úóD?Tó|′e
//1￡?óDó|′e
//0￡??Tó|′e			  
void IIC_Send_Byte(u8 txd)
{                        
    u8 t;   
		SDA_OUT(); 	    
    IIC_SCL=0;//à-μíê±?ó?aê?êy?Y′?ê?
    for(t=0;t<8;t++)
    {              
        IIC_SDA=(txd&0x80)>>7;
        txd<<=1; 	  
		delay_us(2);   //??TEA5767?aèy???óê±??ê?±?D?μ?
		IIC_SCL=1;
		delay_us(2); 
		IIC_SCL=0;	
		delay_us(2);
    }	 
} 	    
//?á1??×??ú￡?ack=1ê±￡?·￠?íACK￡?ack=0￡?·￠?ínACK   
u8 IIC_Read_Byte(unsigned char ack)
{
	unsigned char i,receive=0;
	SDA_IN();//SDAéè???aê?è?
  for(i=0;i<8;i++ )
	{
    IIC_SCL=0; 
    delay_us(2);
		IIC_SCL=1;
    receive<<=1;
    if(READ_SDA)receive++;   
		delay_us(1); 
  }					 
	if (!ack)
			IIC_NAck();//·￠?ínACK
	else
			IIC_Ack(); //·￠?íACK   
	return receive;
}
 
void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr)
{
	IIC_Start();  
	
	if(device_addr==0xA0) //eepromμ??·′óóú1×??ú
		IIC_Send_Byte(0xA0 + ((addr/256)<<1));//·￠?í??μ??·
	else
		IIC_Send_Byte(device_addr);	    //·￠?÷?tμ??·
	IIC_Wait_Ack(); 
	IIC_Send_Byte(addr&0xFF);   //·￠?íμíμ??·
	IIC_Wait_Ack(); 
	IIC_Send_Byte(data);     //·￠?í×??ú							   
	IIC_Wait_Ack();  		    	   
  IIC_Stop();//2úéúò???í￡?1ì??t 
	if(device_addr==0xA0) //
		delay_ms(10);
	else
		delay_us(2);
}
 
uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead)  //?á??′??÷?ò?áêy?Y
{	
		uint16_t data;
		IIC_Start();  
		if(device_addr==0xA0)
			IIC_Send_Byte(0xA0 + ((addr/256)<<1));
		else
			IIC_Send_Byte(device_addr);	
		IIC_Wait_Ack();
		IIC_Send_Byte(addr&0xFF);   //·￠?íμíμ??·
		IIC_Wait_Ack(); 
 
		IIC_Start();  	
		IIC_Send_Byte(device_addr+1);	    //·￠?÷?tμ??·
		IIC_Wait_Ack();
		if(ByteNumToRead == 1)//LM75???èêy?Y?a11bit
		{
			data=IIC_Read_Byte(0);
		}
		else
			{
				data=IIC_Read_Byte(1);
				data=(data<<8)+IIC_Read_Byte(0);
			}
		IIC_Stop();//2úéúò???í￡?1ì??t	    
		return data;
}


/**********
*é???2?·??aIO?ú?￡?éI2C????
*
*′ó?aò????aê??aAHT20μ?????I2C
*oˉêy??óDIICoíI2Cμ???±e￡???×￠òa￡?￡?￡?￡?￡?
*
*2020/2/23×?oóDT??è??ú
*
***********/
void  read_AHT20_once(void)
{
	//delay_ms(10);

	reset_AHT20();
	delay_ms(5);

	init_AHT20();
	delay_ms(5);

	startMeasure_AHT20();
	delay_ms(50);

	read_AHT20();
	//delay_ms(5);
}


void  reset_AHT20(void)
{

	I2C_Start();

	I2C_WriteByte(0x70);
	ack_status = Receive_ACK();
	if(ack_status) printf("1");
	else printf("1-n-");
	I2C_WriteByte(0xBA);
	ack_status = Receive_ACK();
		if(ack_status) printf("2");
	else printf("2-n-");
	I2C_Stop();

	/*
	AHT20_OutData[0] = 0;
	AHT20_OutData[1] = 0;
	AHT20_OutData[2] = 0;
	AHT20_OutData[3] = 0;
	*/
}



void  init_AHT20(void)
{
	I2C_Start();

	I2C_WriteByte(0x70);
	ack_status = Receive_ACK();
	if(ack_status) printf("3");
	else printf("3-n-");	
	I2C_WriteByte(0xE1);
	ack_status = Receive_ACK();
	if(ack_status) printf("4");
	else printf("4-n-");
	I2C_WriteByte(0x08);
	ack_status = Receive_ACK();
	if(ack_status) printf("5");
	else printf("5-n-");
	I2C_WriteByte(0x00);
	ack_status = Receive_ACK();
	if(ack_status) printf("6");
	else printf("6-n-");
	I2C_Stop();
}



void  startMeasure_AHT20(void)
{
	//------------
	I2C_Start();

	I2C_WriteByte(0x70);
	ack_status = Receive_ACK();
	if(ack_status) printf("7");
	else printf("7-n-");
	I2C_WriteByte(0xAC);
	ack_status = Receive_ACK();
	if(ack_status) printf("8");
	else printf("8-n-");
	I2C_WriteByte(0x33);
	ack_status = Receive_ACK();
	if(ack_status) printf("9");
	else printf("9-n-");
	I2C_WriteByte(0x00);
	ack_status = Receive_ACK();
	if(ack_status) printf("10");
	else printf("10-n-");
	I2C_Stop();
}



void read_AHT20(void)
{
	uint8_t   i;

	for(i=0; i<6; i++)
	{
		readByte[i]=0;
	}

	//-------------
	I2C_Start();

	I2C_WriteByte(0x71);
	ack_status = Receive_ACK();
	readByte[0]= I2C_ReadByte();
	Send_ACK();

	readByte[1]= I2C_ReadByte();
	Send_ACK();

	readByte[2]= I2C_ReadByte();
	Send_ACK();

	readByte[3]= I2C_ReadByte();
	Send_ACK();

	readByte[4]= I2C_ReadByte();
	Send_ACK();

	readByte[5]= I2C_ReadByte();
	SendNot_Ack();
	//Send_ACK();

	I2C_Stop();

	//--------------
	if( (readByte[0] & 0x68) == 0x08 )
	{
		H1 = readByte[1];
		H1 = (H1<<8) | readByte[2];
		H1 = (H1<<8) | readByte[3];
		H1 = H1>>4;

		H1 = (H1*1000)/1024/1024;

		T1 = readByte[3];
		T1 = T1 & 0x0000000F;
		T1 = (T1<<8) | readByte[4];
		T1 = (T1<<8) | readByte[5];

		T1 = (T1*2000)/1024/1024 - 500;

		AHT20_OutData[0] = (H1>>8) & 0x000000FF;
		AHT20_OutData[1] = H1 & 0x000000FF;

		AHT20_OutData[2] = (T1>>8) & 0x000000FF;
		AHT20_OutData[3] = T1 & 0x000000FF;
	}
	else
	{
		AHT20_OutData[0] = 0xFF;
		AHT20_OutData[1] = 0xFF;

		AHT20_OutData[2] = 0xFF;
		AHT20_OutData[3] = 0xFF;
		printf("lyy");

	}
//	printf("\r\n");
//	printf("温度:%d%d.%d",T1/100,(T1/10)%10,T1%10);
//	printf("湿度:%d%d.%d",H1/100,(H1/10)%10,H1%10);
//	printf("\r\n");
	
	OLED_ShowString(1, 1, "Temperature:");
	OLED_ShowNum(1, 13, T1/100, 1);
	OLED_ShowNum(1, 14, (T1/10)%10, 1);
	OLED_ShowChar(1, 15, '.');
	OLED_ShowNum(1, 16, T1%10, 1);
	
	OLED_ShowString(2, 1, "Humidity:");
	OLED_ShowNum(2, 10, H1/100, 1);
	OLED_ShowNum(2, 11, (H1/10)%10, 1);
	OLED_ShowChar(2, 12, '.');
	OLED_ShowNum(2, 13, H1%10, 1);
}




uint8_t  Receive_ACK(void)
{
	uint8_t result=0;
	uint8_t cnt=0;

	IIC_SCL = 0;
	SDA_IN(); 
	delay_us(4);

	IIC_SCL = 1;
	delay_us(4);

	while(READ_SDA && (cnt<100))
	{
		cnt++;
	}

	IIC_SCL = 0;
	delay_us(4);

	if(cnt<100)
	{
		result=1;
	}
	return result;
}



void  Send_ACK(void)
{
	SDA_OUT();
	IIC_SCL = 0;
	delay_us(4);

	IIC_SDA = 0;
	delay_us(4);

	IIC_SCL = 1;
	delay_us(4);
	IIC_SCL = 0;
	delay_us(4);

	SDA_IN();
}



void  SendNot_Ack(void)
{
	SDA_OUT();
	IIC_SCL = 0;
	delay_us(4);

	IIC_SDA = 1;
	delay_us(4);

	IIC_SCL = 1;
	delay_us(4);

	IIC_SCL = 0;
	delay_us(4);

	IIC_SDA = 0;
	delay_us(4);
}


void I2C_WriteByte(uint8_t  input)
{
	uint8_t  i;
	SDA_OUT();
	for(i=0; i<8; i++)
	{
		IIC_SCL = 0;
		delay_ms(5);

		if(input & 0x80)
		{
			IIC_SDA = 1;
			//delaymm(10);
		}
		else
		{
			IIC_SDA = 0;
			//delaymm(10);
		}

		IIC_SCL = 1;
		delay_ms(5);

		input = (input<<1);
	}

	IIC_SCL = 0;
	delay_us(4);

	SDA_IN();
	delay_us(4);
}	


uint8_t I2C_ReadByte(void)
{
	uint8_t  resultByte=0;
	uint8_t  i=0, a=0;

	IIC_SCL = 0;
	SDA_IN();
	delay_ms(4);

	for(i=0; i<8; i++)
	{
		IIC_SCL = 1;
		delay_ms(3);

		a=0;
		if(READ_SDA)
		{
			a=1;
		}
		else
		{
			a=0;
		}

		//resultByte = resultByte | a;
		resultByte = (resultByte << 1) | a;

		IIC_SCL = 0;
		delay_ms(3);
	}

	SDA_IN();
	delay_ms(10);

	return   resultByte;
}


void  set_AHT20sendOutData(void)
{
	/* --------------------------
	 * 0xFA 0x06 0x0A temperature(2 Bytes) humility(2Bytes) short Address(2 Bytes)
	 * And Check (1 byte)
	 * -------------------------*/
	AHT20sendOutData[3] = AHT20_OutData[0];
	AHT20sendOutData[4] = AHT20_OutData[1];
	AHT20sendOutData[5] = AHT20_OutData[2];
	AHT20sendOutData[6] = AHT20_OutData[3];

//	AHT20sendOutData[7] = (drf1609.shortAddress >> 8) & 0x00FF;
//	AHT20sendOutData[8] = drf1609.shortAddress  & 0x00FF;

//	AHT20sendOutData[9] = getXY(AHT20sendOutData,10);
}


void  I2C_Start(void)
{
	SDA_OUT();
	IIC_SCL = 1;
	delay_ms(4);

	IIC_SDA = 1;
	delay_ms(4);
	IIC_SDA = 0;
	delay_ms(4);

	IIC_SCL = 0;
	delay_ms(4);
}



void  I2C_Stop(void)
{
	SDA_OUT();
	IIC_SDA = 0;
	delay_ms(4);

	IIC_SCL = 1;
	delay_ms(4);

	IIC_SDA = 1;
	delay_ms(4);
}

(5:OLED_Font.h文件编写:

#ifndef __OLED_FONT_H
#define __OLED_FONT_H

/*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
};

#endif

(6:delay.h与delay.c文件编写:

delay.h:

#ifndef __DELAY_H
#define __DELAY_H 			   
#include "sys.h"
//	 

//STM32F103o?D?°?ày3ì
//?aoˉêy°?±?ày3ì
/********** mcudev.taobao.com 3??·  ********/


//ê1ó?SysTickμ???í¨??êy?￡ê????ó3ù??DD1üàí
//°üà¨delay_us,delay_ms

// 	 
void delay_init(void);
void delay_ms(u16 nms);
void delay_us(u32 nus);

#endif

delay.c:

#include "delay.h"
#include "sys.h"

//STM32F103o?D?°?ày3ì
//?aoˉêy°?±?ày3ì
/********** mcudev.taobao.com 3??·  ********/


// 	 
//è?1?ê1ó?ucos,?ò°üà¨????μ?í·???t?′?é.
#if SYSTEM_SUPPORT_UCOS
#include "includes.h"					//ucos ê1ó?	  
#endif
//	 

//STM32?a·￠°?
//ê1ó?SysTickμ???í¨??êy?￡ê????ó3ù??DD1üàí
//°üà¨delay_us,delay_ms

// 	 
static u8  fac_us=0;//us?óê±±?3?êy
static u16 fac_ms=0;//ms?óê±±?3?êy
#ifdef OS_CRITICAL_METHOD 	//è?1?OS_CRITICAL_METHOD?¨ò?á?,?μ?÷ê1ó?ucosIIá?.
//systick?D??·t??oˉêy,ê1ó?ucosê±ó?μ?
void SysTick_Handler(void)
{				   
	OSIntEnter();		//??è??D??
    OSTimeTick();       //μ÷ó?ucosμ?ê±?ó·t??3ìDò               
    OSIntExit();        //′￥·￠è????D??èí?D??
}
#endif

//3?ê??ˉ?ó3ùoˉêy
//μ±ê1ó?ucosμ?ê±oò,′?oˉêy?á3?ê??ˉucosμ?ê±?ó?ú??
//SYSTICKμ?ê±?ó1ì?¨?aHCLKê±?óμ?1/8
//SYSCLK:?μí3ê±?ó
void delay_init()	 
{

#ifdef OS_CRITICAL_METHOD 	//è?1?OS_CRITICAL_METHOD?¨ò?á?,?μ?÷ê1ó?ucosIIá?.
	u32 reload;
#endif
	SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);	//????ía2?ê±?ó  HCLK/8
	fac_us=SystemCoreClock/8000000;	//?a?μí3ê±?óμ?1/8  
	 
#ifdef OS_CRITICAL_METHOD 	//è?1?OS_CRITICAL_METHOD?¨ò?á?,?μ?÷ê1ó?ucosIIá?.
	reload=SystemCoreClock/8000000;		//?????óμ???êy′?êy μ￥???aK	   
	reload*=1000000/OS_TICKS_PER_SEC;//?ù?YOS_TICKS_PER_SECéè?¨ò?3?ê±??
							//reload?a24????′??÷,×?′ó?μ:16777216,?ú72M??,??o?1.86s×óóò	
	fac_ms=1000/OS_TICKS_PER_SEC;//′ú±íucos?éò??óê±μ?×?éùμ￥??	   
	SysTick->CTRL|=SysTick_CTRL_TICKINT_Msk;   	//?a??SYSTICK?D??
	SysTick->LOAD=reload; 	//??1/OS_TICKS_PER_SEC???D??ò?′?	
	SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk;   	//?a??SYSTICK    
#else
	fac_ms=(u16)fac_us*1000;//·?ucos??,′ú±í????msDèòaμ?systickê±?óêy   
#endif
}								    

#ifdef OS_CRITICAL_METHOD	//ê1ó?á?ucos
//?óê±nus
//nus?aòa?óê±μ?usêy.		    								   
void delay_us(u32 nus)
{		
	u32 ticks;
	u32 told,tnow,tcnt=0;
	u32 reload=SysTick->LOAD;	//LOADμ??μ	    	 
	ticks=nus*fac_us; 			//Dèòaμ??ú??êy	  		 
	tcnt=0;
	told=SysTick->VAL;        	//????è?ê±μ???êy?÷?μ
	while(1)
	{
		tnow=SysTick->VAL;	
		if(tnow!=told)
		{	    
			if(tnow<told)tcnt+=told-tnow;//?aà?×￠òaò???SYSTICKê?ò???μY??μ???êy?÷?í?éò?á?.
			else tcnt+=reload-tnow+told;	    
			told=tnow;
			if(tcnt>=ticks)break;//ê±??3?1y/μèóúòa?ó3ùμ?ê±??,?òí?3?.
		}  
	}; 									    
}
//?óê±nms
//nms:òa?óê±μ?msêy
void delay_ms(u16 nms)
{	
	if(OSRunning==TRUE)//è?1?osò??-?ú?üá?	    
	{		  
		if(nms>=fac_ms)//?óê±μ?ê±??′óóúucosμ?×?éùê±???ü?ú 
		{
   			OSTimeDly(nms/fac_ms);//ucos?óê±
		}
		nms%=fac_ms;				//ucosò??-?T·¨ìá1??a?′D?μ??óê±á?,2éó???í¨·?ê??óê±    
	}
	delay_us((u32)(nms*1000));	//??í¨·?ê??óê±,′?ê±ucos?T·¨???ˉμ÷?è.
}
#else//2?ó?ucosê±
//?óê±nus
//nus?aòa?óê±μ?usêy.		    								   
void delay_us(u32 nus)
{		
	u32 temp;	    	 
	SysTick->LOAD=nus*fac_us; //ê±???ó??	  		 
	SysTick->VAL=0x00;        //??????êy?÷
	SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ;          //?aê?μ1êy	 
	do
	{
		temp=SysTick->CTRL;
	}
	while(temp&0x01&&!(temp&(1<<16)));//μè′yê±??μ?′?   
	SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk;       //1?±???êy?÷
	SysTick->VAL =0X00;       //??????êy?÷	 
}
//?óê±nms
//×￠òanmsμ?·??§
//SysTick->LOAD?a24????′??÷,?ùò?,×?′ó?óê±?a:
//nms<=0xffffff*8*1000/SYSCLK
//SYSCLKμ￥???aHz,nmsμ￥???ams
//??72Mì??t??,nms<=1864 
void delay_ms(u16 nms)
{	 		  	  
	u32 temp;		   
	SysTick->LOAD=(u32)nms*fac_ms;//ê±???ó??(SysTick->LOAD?a24bit)
	SysTick->VAL =0x00;           //??????êy?÷
	SysTick->CTRL|=SysTick_CTRL_ENABLE_Msk ;          //?aê?μ1êy  
	do
	{
		temp=SysTick->CTRL;
	}
	while(temp&0x01&&!(temp&(1<<16)));//μè′yê±??μ?′?   
	SysTick->CTRL&=~SysTick_CTRL_ENABLE_Msk;       //1?±???êy?÷
	SysTick->VAL =0X00;       //??????êy?÷	  	    
} 
#endif

(7:usart.h与usart.c文件编写:

usart.h:

#ifndef __USART_H
#define __USART_H
#include "stdio.h"	
#include "sys.h" 

//STM32F103o?D?°?ày3ì
//?aoˉêy°?±?ày3ì
/********** mcudev.taobao.com 3??·  ********/

//	 
//STM32?a·￠°?
//′??ú13?ê??ˉ		   

#define USART_REC_LEN  			200  	//?¨ò?×?′ó?óê?×??úêy 200
#define EN_USART1_RX 			1		    //ê1?ü￡¨1￡?/???1￡¨0￡?′??ú1?óê?
	  	
extern u8  USART_RX_BUF[USART_REC_LEN]; //?óê??o3?,×?′óUSART_REC_LEN??×??ú.??×??ú?a??DD·? 
extern u16 USART_RX_STA;         		//?óê?×′ì?±ê??	
//è?1???′??ú?D???óê?￡???2?òa×￠êíò???oê?¨ò?
void uart_init(u32 bound);
#endif

usart.c:

#include "sys.h"
#include "usart.h"


//STM32F103o?D?°?ày3ì
//?aoˉêy°?±?ày3ì
/********** mcudev.taobao.com 3??·  ********/


// 	 
//è?1?ê1ó?ucos,?ò°üà¨????μ?í·???t?′?é.
#if SYSTEM_SUPPORT_UCOS
#include "includes.h"					//ucos ê1ó?	  
#endif
//	 
//STM32?a·￠°?
//′??ú13?ê??ˉ		   

// 	  
 

//
//?óè?ò???′ú??,?§3?printfoˉêy,??2?Dèòa????use MicroLIB	  
#if 1
#pragma import(__use_no_semihosting)             
//±ê×??aDèòaμ??§3?oˉêy                 
struct __FILE 
{ 
	int handle; 

}; 

FILE __stdout;       
//?¨ò?_sys_exit()ò?±ü?aê1ó?°??÷?ú?￡ê?    
void _sys_exit(int x) 
{ 
	x = x; 
} 
//???¨ò?fputcoˉêy 
int fputc(int ch, FILE *f)
{      
	while((USART1->SR&0X40)==0);//?-?··￠?í,?±μ?·￠?ííê±?   
    USART1->DR = (u8) ch;      
	return ch;
}
#endif 

/*ê1ó?microLibμ?·?·¨*/
 /* 
int fputc(int ch, FILE *f)
{
	USART_SendData(USART1, (uint8_t) ch);

	while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET) {}	
   
    return ch;
}
int GetKey (void)  { 

    while (!(USART1->SR & USART_FLAG_RXNE));

    return ((int)(USART1->DR & 0x1FF));
}
*/
 
#if EN_USART1_RX   //è?1?ê1?üá??óê?
//′??ú1?D??·t??3ìDò
//×￠òa,?áè?USARTx->SR?ü±ü?a?a??????μ?′í?ó   	
u8 USART_RX_BUF[USART_REC_LEN];     //?óê??o3?,×?′óUSART_REC_LEN??×??ú.
//?óê?×′ì?
//bit15￡?	?óê?íê3é±ê??
//bit14￡?	?óê?μ?0x0d
//bit13~0￡?	?óê?μ?μ?óDD§×??úêy??
u16 USART_RX_STA=0;       //?óê?×′ì?±ê??	  
  
void uart_init(u32 bound){
    //GPIO???úéè??
  GPIO_InitTypeDef GPIO_InitStructure;
	USART_InitTypeDef USART_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;
	 
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);	//ê1?üUSART1￡?GPIOAê±?ó
     //USART1_TX   PA.9
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;	//?′ó?í?íìê?3?
    GPIO_Init(GPIOA, &GPIO_InitStructure);
   
    //USART1_RX	  PA.10
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//????ê?è?
    GPIO_Init(GPIOA, &GPIO_InitStructure);  

   //Usart1 NVIC ????

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//?à??ó??è??3
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;		//×óó??è??3
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQí¨μàê1?ü
	NVIC_Init(&NVIC_InitStructure);	//?ù?Y???¨μ?2?êy3?ê??ˉVIC??′??÷
  
   //USART 3?ê??ˉéè??

	USART_InitStructure.USART_BaudRate = bound;//ò?°?éè???a9600;
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×?3¤?a8??êy?Y??ê?
	USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò???í￡?1??
	USART_InitStructure.USART_Parity = USART_Parity_No;//?T????D￡?é??
	USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//?Tó2?têy?Yá÷????
	USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;	//ê?·￠?￡ê?

    USART_Init(USART1, &USART_InitStructure); //3?ê??ˉ′??ú
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//?a???D??
    USART_Cmd(USART1, ENABLE);                    //ê1?ü′??ú 

}



void USART1_IRQHandler(void)                	//′??ú1?D??·t??3ìDò
	{
	u8 Res;
#ifdef OS_TICKS_PER_SEC	 	//è?1?ê±?ó?ú??êy?¨ò?á?,?μ?÷òaê1ó?ucosIIá?.
	OSIntEnter();    
#endif
	if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //?óê??D??(?óê?μ?μ?êy?Y±?D?ê?0x0d 0x0a?á?2)
		{
		Res =USART_ReceiveData(USART1);//(USART1->DR);	//?áè??óê?μ?μ?êy?Y
		
		if((USART_RX_STA&0x8000)==0)//?óê??′íê3é
			{
			if(USART_RX_STA&0x4000)//?óê?μ?á?0x0d
				{
				if(Res!=0x0a)USART_RX_STA=0;//?óê?′í?ó,??D??aê?
				else USART_RX_STA|=0x8000;	//?óê?íê3éá? 
				}
			else //?1??ê?μ?0X0D
				{	
				if(Res==0x0d)USART_RX_STA|=0x4000;
				else
					{
					USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
					USART_RX_STA++;
					if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//?óê?êy?Y′í?ó,??D??aê??óê?	  
					}		 
				}
			}   		 
     } 
#ifdef OS_TICKS_PER_SEC	 	//è?1?ê±?ó?ú??êy?¨ò?á?,?μ?÷òaê1ó?ucosIIá?.
	OSIntExit();  											 
#endif
} 
#endif

(8:bsp_i2c.h与bsp_i2c.c文件编写:

bsp_i2c.h:

#ifndef __BSP_I2C_H
#define __BSP_I2C_H

#include "sys.h"
#include "delay.h"
#include "usart.h"
//ê1ó?IIC1 1ò??M24C02,OLED,LM75AD,HT1382    PB6,PB7
 
#define SDA_IN()  {GPIOB->CRL&=0X0FFFFFFF;GPIOB->CRL|=(u32)8<<28;}
#define SDA_OUT() {GPIOB->CRL&=0X0FFFFFFF;GPIOB->CRL|=(u32)3<<28;}
 
//IO2ù×÷oˉêy	 
#define IIC_SCL    PBout(6) //SCL
#define IIC_SDA    PBout(7) //SDA	 
#define READ_SDA   PBin(7)  //ê?è?SDA 


//IIC?ùóD2ù×÷oˉêy
void IIC_Init(void);                //3?ê??ˉIICμ?IO?ú				 
void IIC_Start(void);				//·￠?íIIC?aê?D?o?
void IIC_Stop(void);	  			//·￠?íIICí￡?1D?o?
void IIC_Send_Byte(u8 txd);			//IIC·￠?íò???×??ú
u8 IIC_Read_Byte(unsigned char ack);//IIC?áè?ò???×??ú
u8 IIC_Wait_Ack(void); 				//IICμè′yACKD?o?
void IIC_Ack(void);					//IIC·￠?íACKD?o?
void IIC_NAck(void);				//IIC2?·￠?íACKD?o?
 
void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr);
uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead);//??′??÷μ??·￡??÷?tμ??·￡?òa?áμ?×??úêy  


void  read_AHT20_once(void);
void  reset_AHT20(void);
void  init_AHT20(void);	
void  startMeasure_AHT20(void);
void  read_AHT20(void);
uint8_t  Receive_ACK(void);
void  Send_ACK(void);
void  SendNot_Ack(void);
void I2C_WriteByte(uint8_t  input);
uint8_t I2C_ReadByte(void);	
void  set_AHT20sendOutData(void);
void  I2C_Start(void);
void  I2C_Stop(void);
#endif

bsp_i2c.c:

#include "bsp_i2c.h"
#include "delay.h"
#include "OLED.h"

uint8_t   ack_status=0;
uint8_t   readByte[6];
uint8_t   AHT20_status=0;

uint32_t  H1=0;  //Humility
uint32_t  T1=0;  //Temperature

uint8_t  AHT20_OutData[4];
uint8_t  AHT20sendOutData[10] = {0xFA, 0x06, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF};

void IIC_Init(void)
{					     
	GPIO_InitTypeDef GPIO_InitStructure;
	RCC_APB2PeriphClockCmd(	RCC_APB2Periph_GPIOB, ENABLE );	
	   
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP ;   //í?íìê?3?
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB, &GPIO_InitStructure);
 
	IIC_SCL=1;
	IIC_SDA=1;
 
}
//2úéúIIC?eê?D?o?
void IIC_Start(void)
{
	SDA_OUT();     //sda??ê?3?
	IIC_SDA=1;	  	  
	IIC_SCL=1;
	delay_us(4);
 	IIC_SDA=0;//START:when CLK is high,DATA change form high to low 
	delay_us(4);
	IIC_SCL=0;//?ˉ×?I2C×ü??￡?×?±?·￠?í?ò?óê?êy?Y 
}	  
//2úéúIICí￡?1D?o?
void IIC_Stop(void)
{
	SDA_OUT();//sda??ê?3?
	IIC_SCL=0;
	IIC_SDA=0;//STOP:when CLK is high DATA change form low to high
 	delay_us(4);
	IIC_SCL=1; 
	IIC_SDA=1;//·￠?íI2C×ü???áê?D?o?
	delay_us(4);							   	
}
//μè′yó|′eD?o?μ?à′
//·μ???μ￡o1￡??óê?ó|′eê§°ü
//        0￡??óê?ó|′e3é1|
u8 IIC_Wait_Ack(void)
{
	u8 ucErrTime=0;
	SDA_IN();      //SDAéè???aê?è?  
	IIC_SDA=1;delay_us(1);	   
	IIC_SCL=1;delay_us(1);	 
	while(READ_SDA)
	{
		ucErrTime++;
		if(ucErrTime>250)
		{
			IIC_Stop();
			return 1;
		}
	}
	IIC_SCL=0;//ê±?óê?3?0 	   
	return 0;  
} 
//2úéúACKó|′e
void IIC_Ack(void)
{
	IIC_SCL=0;
	SDA_OUT();
	IIC_SDA=0;
	delay_us(2);
	IIC_SCL=1;
	delay_us(2);
	IIC_SCL=0;
}
//2?2úéúACKó|′e		    
void IIC_NAck(void)
{
	IIC_SCL=0;
	SDA_OUT();
	IIC_SDA=1;
	delay_us(2);
	IIC_SCL=1;
	delay_us(2);
	IIC_SCL=0;
}					 				     
//IIC·￠?íò???×??ú
//·μ??′ó?úóD?Tó|′e
//1￡?óDó|′e
//0￡??Tó|′e			  
void IIC_Send_Byte(u8 txd)
{                        
    u8 t;   
		SDA_OUT(); 	    
    IIC_SCL=0;//à-μíê±?ó?aê?êy?Y′?ê?
    for(t=0;t<8;t++)
    {              
        IIC_SDA=(txd&0x80)>>7;
        txd<<=1; 	  
		delay_us(2);   //??TEA5767?aèy???óê±??ê?±?D?μ?
		IIC_SCL=1;
		delay_us(2); 
		IIC_SCL=0;	
		delay_us(2);
    }	 
} 	    
//?á1??×??ú￡?ack=1ê±￡?·￠?íACK￡?ack=0￡?·￠?ínACK   
u8 IIC_Read_Byte(unsigned char ack)
{
	unsigned char i,receive=0;
	SDA_IN();//SDAéè???aê?è?
  for(i=0;i<8;i++ )
	{
    IIC_SCL=0; 
    delay_us(2);
		IIC_SCL=1;
    receive<<=1;
    if(READ_SDA)receive++;   
		delay_us(1); 
  }					 
	if (!ack)
			IIC_NAck();//·￠?ínACK
	else
			IIC_Ack(); //·￠?íACK   
	return receive;
}
 
void IIC_WriteByte(uint16_t addr,uint8_t data,uint8_t device_addr)
{
	IIC_Start();  
	
	if(device_addr==0xA0) //eepromμ??·′óóú1×??ú
		IIC_Send_Byte(0xA0 + ((addr/256)<<1));//·￠?í??μ??·
	else
		IIC_Send_Byte(device_addr);	    //·￠?÷?tμ??·
	IIC_Wait_Ack(); 
	IIC_Send_Byte(addr&0xFF);   //·￠?íμíμ??·
	IIC_Wait_Ack(); 
	IIC_Send_Byte(data);     //·￠?í×??ú							   
	IIC_Wait_Ack();  		    	   
  IIC_Stop();//2úéúò???í￡?1ì??t 
	if(device_addr==0xA0) //
		delay_ms(10);
	else
		delay_us(2);
}
 
uint16_t IIC_ReadByte(uint16_t addr,uint8_t device_addr,uint8_t ByteNumToRead)  //?á??′??÷?ò?áêy?Y
{	
		uint16_t data;
		IIC_Start();  
		if(device_addr==0xA0)
			IIC_Send_Byte(0xA0 + ((addr/256)<<1));
		else
			IIC_Send_Byte(device_addr);	
		IIC_Wait_Ack();
		IIC_Send_Byte(addr&0xFF);   //·￠?íμíμ??·
		IIC_Wait_Ack(); 
 
		IIC_Start();  	
		IIC_Send_Byte(device_addr+1);	    //·￠?÷?tμ??·
		IIC_Wait_Ack();
		if(ByteNumToRead == 1)//LM75???èêy?Y?a11bit
		{
			data=IIC_Read_Byte(0);
		}
		else
			{
				data=IIC_Read_Byte(1);
				data=(data<<8)+IIC_Read_Byte(0);
			}
		IIC_Stop();//2úéúò???í￡?1ì??t	    
		return data;
}


/**********
*é???2?·??aIO?ú?￡?éI2C????
*
*′ó?aò????aê??aAHT20μ?????I2C
*oˉêy??óDIICoíI2Cμ???±e￡???×￠òa￡?￡?￡?￡?￡?
*
*2020/2/23×?oóDT??è??ú
*
***********/
void  read_AHT20_once(void)
{
	//delay_ms(10);

	reset_AHT20();
	delay_ms(5);

	init_AHT20();
	delay_ms(5);

	startMeasure_AHT20();
	delay_ms(50);

	read_AHT20();
	//delay_ms(5);
}


void  reset_AHT20(void)
{

	I2C_Start();

	I2C_WriteByte(0x70);
	ack_status = Receive_ACK();
	if(ack_status) printf("1");
	else printf("1-n-");
	I2C_WriteByte(0xBA);
	ack_status = Receive_ACK();
		if(ack_status) printf("2");
	else printf("2-n-");
	I2C_Stop();

	/*
	AHT20_OutData[0] = 0;
	AHT20_OutData[1] = 0;
	AHT20_OutData[2] = 0;
	AHT20_OutData[3] = 0;
	*/
}



void  init_AHT20(void)
{
	I2C_Start();

	I2C_WriteByte(0x70);
	ack_status = Receive_ACK();
	if(ack_status) printf("3");
	else printf("3-n-");	
	I2C_WriteByte(0xE1);
	ack_status = Receive_ACK();
	if(ack_status) printf("4");
	else printf("4-n-");
	I2C_WriteByte(0x08);
	ack_status = Receive_ACK();
	if(ack_status) printf("5");
	else printf("5-n-");
	I2C_WriteByte(0x00);
	ack_status = Receive_ACK();
	if(ack_status) printf("6");
	else printf("6-n-");
	I2C_Stop();
}



void  startMeasure_AHT20(void)
{
	//------------
	I2C_Start();

	I2C_WriteByte(0x70);
	ack_status = Receive_ACK();
	if(ack_status) printf("7");
	else printf("7-n-");
	I2C_WriteByte(0xAC);
	ack_status = Receive_ACK();
	if(ack_status) printf("8");
	else printf("8-n-");
	I2C_WriteByte(0x33);
	ack_status = Receive_ACK();
	if(ack_status) printf("9");
	else printf("9-n-");
	I2C_WriteByte(0x00);
	ack_status = Receive_ACK();
	if(ack_status) printf("10");
	else printf("10-n-");
	I2C_Stop();
}



void read_AHT20(void)
{
	uint8_t   i;

	for(i=0; i<6; i++)
	{
		readByte[i]=0;
	}

	//-------------
	I2C_Start();

	I2C_WriteByte(0x71);
	ack_status = Receive_ACK();
	readByte[0]= I2C_ReadByte();
	Send_ACK();

	readByte[1]= I2C_ReadByte();
	Send_ACK();

	readByte[2]= I2C_ReadByte();
	Send_ACK();

	readByte[3]= I2C_ReadByte();
	Send_ACK();

	readByte[4]= I2C_ReadByte();
	Send_ACK();

	readByte[5]= I2C_ReadByte();
	SendNot_Ack();
	//Send_ACK();

	I2C_Stop();

	//--------------
	if( (readByte[0] & 0x68) == 0x08 )
	{
		H1 = readByte[1];
		H1 = (H1<<8) | readByte[2];
		H1 = (H1<<8) | readByte[3];
		H1 = H1>>4;

		H1 = (H1*1000)/1024/1024;

		T1 = readByte[3];
		T1 = T1 & 0x0000000F;
		T1 = (T1<<8) | readByte[4];
		T1 = (T1<<8) | readByte[5];

		T1 = (T1*2000)/1024/1024 - 500;

		AHT20_OutData[0] = (H1>>8) & 0x000000FF;
		AHT20_OutData[1] = H1 & 0x000000FF;

		AHT20_OutData[2] = (T1>>8) & 0x000000FF;
		AHT20_OutData[3] = T1 & 0x000000FF;
	}
	else
	{
		AHT20_OutData[0] = 0xFF;
		AHT20_OutData[1] = 0xFF;

		AHT20_OutData[2] = 0xFF;
		AHT20_OutData[3] = 0xFF;
		printf("lyy");

	}
//	printf("\r\n");
//	printf("温度:%d%d.%d",T1/100,(T1/10)%10,T1%10);
//	printf("湿度:%d%d.%d",H1/100,(H1/10)%10,H1%10);
//	printf("\r\n");
	
	OLED_ShowString(1, 1, "Temperature:");
	OLED_ShowNum(1, 13, T1/100, 1);
	OLED_ShowNum(1, 14, (T1/10)%10, 1);
	OLED_ShowChar(1, 15, '.');
	OLED_ShowNum(1, 16, T1%10, 1);
	
	OLED_ShowString(2, 1, "Humidity:");
	OLED_ShowNum(2, 10, H1/100, 1);
	OLED_ShowNum(2, 11, (H1/10)%10, 1);
	OLED_ShowChar(2, 12, '.');
	OLED_ShowNum(2, 13, H1%10, 1);
}




uint8_t  Receive_ACK(void)
{
	uint8_t result=0;
	uint8_t cnt=0;

	IIC_SCL = 0;
	SDA_IN(); 
	delay_us(4);

	IIC_SCL = 1;
	delay_us(4);

	while(READ_SDA && (cnt<100))
	{
		cnt++;
	}

	IIC_SCL = 0;
	delay_us(4);

	if(cnt<100)
	{
		result=1;
	}
	return result;
}



void  Send_ACK(void)
{
	SDA_OUT();
	IIC_SCL = 0;
	delay_us(4);

	IIC_SDA = 0;
	delay_us(4);

	IIC_SCL = 1;
	delay_us(4);
	IIC_SCL = 0;
	delay_us(4);

	SDA_IN();
}



void  SendNot_Ack(void)
{
	SDA_OUT();
	IIC_SCL = 0;
	delay_us(4);

	IIC_SDA = 1;
	delay_us(4);

	IIC_SCL = 1;
	delay_us(4);

	IIC_SCL = 0;
	delay_us(4);

	IIC_SDA = 0;
	delay_us(4);
}


void I2C_WriteByte(uint8_t  input)
{
	uint8_t  i;
	SDA_OUT();
	for(i=0; i<8; i++)
	{
		IIC_SCL = 0;
		delay_ms(5);

		if(input & 0x80)
		{
			IIC_SDA = 1;
			//delaymm(10);
		}
		else
		{
			IIC_SDA = 0;
			//delaymm(10);
		}

		IIC_SCL = 1;
		delay_ms(5);

		input = (input<<1);
	}

	IIC_SCL = 0;
	delay_us(4);

	SDA_IN();
	delay_us(4);
}	


uint8_t I2C_ReadByte(void)
{
	uint8_t  resultByte=0;
	uint8_t  i=0, a=0;

	IIC_SCL = 0;
	SDA_IN();
	delay_ms(4);

	for(i=0; i<8; i++)
	{
		IIC_SCL = 1;
		delay_ms(3);

		a=0;
		if(READ_SDA)
		{
			a=1;
		}
		else
		{
			a=0;
		}

		//resultByte = resultByte | a;
		resultByte = (resultByte << 1) | a;

		IIC_SCL = 0;
		delay_ms(3);
	}

	SDA_IN();
	delay_ms(10);

	return   resultByte;
}


void  set_AHT20sendOutData(void)
{
	/* --------------------------
	 * 0xFA 0x06 0x0A temperature(2 Bytes) humility(2Bytes) short Address(2 Bytes)
	 * And Check (1 byte)
	 * -------------------------*/
	AHT20sendOutData[3] = AHT20_OutData[0];
	AHT20sendOutData[4] = AHT20_OutData[1];
	AHT20sendOutData[5] = AHT20_OutData[2];
	AHT20sendOutData[6] = AHT20_OutData[3];

//	AHT20sendOutData[7] = (drf1609.shortAddress >> 8) & 0x00FF;
//	AHT20sendOutData[8] = drf1609.shortAddress  & 0x00FF;

//	AHT20sendOutData[9] = getXY(AHT20sendOutData,10);
}


void  I2C_Start(void)
{
	SDA_OUT();
	IIC_SCL = 1;
	delay_ms(4);

	IIC_SDA = 1;
	delay_ms(4);
	IIC_SDA = 0;
	delay_ms(4);

	IIC_SCL = 0;
	delay_ms(4);
}



void  I2C_Stop(void)
{
	SDA_OUT();
	IIC_SDA = 0;
	delay_ms(4);

	IIC_SCL = 1;
	delay_ms(4);

	IIC_SDA = 1;
	delay_ms(4);
}

(9:编写主文件main.c文件代码:

#include "delay.h"
#include "usart.h"
#include "bsp_i2c.h"
#include "OLED.h"
#include "MyRTC.h"
#include "Timer.h"

int main(void)
{	
	delay_init();  
	uart_init(9600);
	OLED_Init();
	MyRTC_Init();
	IIC_Init();
	Timer_Init();
	
	MyRTC_SetTime();
	while(1)
	{
		
		
		//delay_ms(1000);
	}
}
void TIM2_IRQHandler(void)
{
	if (TIM_GetITStatus(TIM2, TIM_IT_Update) == SET)
	{
		
		read_AHT20_once();
		MyRTC_ReadTime();
		TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
	}
}

到此，工程文件建立完毕！库函数工程搭建与完善成功！！！工程搭建与完善完成情况截图如下所示：

八、第二小问的电路连接

1、ST-Link的电脑环境配置以及与STM32的电路连接：

请参考我的这篇博客：stm32通过寄存器方式利用GPIO端口点亮LED_-HSheng的博客-CSDN博客

这里附上ST-Link与STM32的电路连接图：

2、基于IIC协议的4排针引脚的OLED与STM32的电路连接如下：

GND——GND；

VCC——3.3V；

SCL——PB8；

SDA——PB9；

3、温湿度采集模块AHT20与STM32的连接如下图所示：

这里附上AHT20的引脚简介图：

4、连接好的板子电路实物图展示：

九、第二小问库函数工程烧录运行

1、编译与烧录，如何通过ST-Link烧录进STM32中，参考我的这篇博客：

stm32通过寄存器方式利用GPIO端口点亮LED_-HSheng的博客-CSDN博客

2、工程运行结果展示：

十、总结

在完成STM32作业的过程中，通过深入研究STM32F103的RTC原理，我成功实现了读取内部时钟信息和与PC上位机的串口通信。结合带有SPI或IIC接口的OLED屏幕模块，我实现了将时钟信息及AHT20传感器的温湿度数据显示在OLED上，完成了实验要求。这次经历使我更深入了解了嵌入式系统开发，提升了对RTC和传感器的应用能力。

同时本实验让我深刻体验了理论知识与实际应用的结合。通过与RTC和OLED屏幕的互联，我更加自信地处理了嵌入式系统中的硬件交互问题。这次项目培养了我的解决问题的能力，同时也加深了对实时时钟和传感器应用的理解，为未来的嵌入式开发奠定了坚实的基础。

十一、参考资料

1、【精选】STM32日历读取，设置和输出_st32日期流程图_一只特立独行的猪 ️的博客-CSDN博客

2、STM32日历读取，设置和输出_stm32 日历_机智的橙子的博客-CSDN博客

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