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GD32F303固件库开发（14）----IIC之配置OLED

时间：2023-07-26 08:55

人气：

作者：admin

标签： IIC  固件库  OLED  代码  gd32f303 

导读：本章配置GD32F303使用IIC进行驱动SSD1306的12864OLED。...

概述

本章配置GD32F303使用IIC进行驱动SSD1306的12864OLED。 查阅手册可以得知，PB10、PB11为I2C的接口。 需要GD样片的可以加群申请：615061293 。

视频教学

https://www.bilibili.com/video/BV1od4y1u7t7/

csdn课程

课程更加详细。 https://download.csdn.net/course/detail/37144

样品申请

https://www.wjx.top/vm/wFGhGPF.aspx#

参考文档

GD官方文档GD32F30x_Firmware_Library_V2.1.4下面IIC的Master_transmitter&slave_receiver

时钟使能

/*!
    brief      enable the peripheral clock
    param[in]  none
    param[out] none
    retval     none
*/
void rcu_config(void)
{
    /* enable GPIOB clock */
    rcu_periph_clock_enable(RCU_GPIOB);
    /* enable I2C1 clock */
    rcu_periph_clock_enable(RCU_I2C1);
}

初始化IO

/*!
    brief      cofigure the GPIO ports
    param[in]  none
    param[out] none
    retval     none
*/
void gpio_config(void)
{

    /* connect PB10 to I2C1_SCL */
    /* connect PB11 to I2C1_SDA */
    gpio_init(GPIOB, GPIO_MODE_AF_OD, GPIO_OSPEED_50MHZ,  GPIO_PIN_10 | GPIO_PIN_11);
}

IIC初始化

/*!
    brief      cofigure the I2C0 and I2C1 interfaces
    param[in]  none
    param[out] none
    retval     none
*/
void i2c_config(void)
{

    i2c_clock_config(I2C1, 100000, I2C_DTCY_2);
    /* I2C address configure */
    i2c_mode_addr_config(I2C1, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, 0x78);
    /* enable I2C1 */
    i2c_enable(I2C1);
    /* enable acknowledge */
    i2c_ack_config(I2C1, I2C_ACK_ENABLE);
}

配置IIC接口

/*!
    brief      cofigure the  I2C1 interfaces
    param[in]  none
    param[out] none
    retval     none
*/
void i2c_config(void)
{

    /* configure I2C1 clock */
    i2c_clock_config(I2C1, 100000, I2C_DTCY_2);
    /* configure I2C1 address */
    i2c_mode_addr_config(I2C1, I2C_I2CMODE_ENABLE, I2C_ADDFORMAT_7BITS, 0x78);
    /* enable I2C1 */
    i2c_enable(I2C1);
    /* enable acknowledge */
    i2c_ack_config(I2C1, I2C_ACK_ENABLE);
}

修改IIC发送代码

将Master_transmitter&slave_receiver的IIC发送代码进行修改

/**
  * @brief I2C1写函数
  * @param addr设备地址
  * @param pdata 数据指针
  * @param data_length 数据长度
  */
void i2c_write(uint8_t addr, uint8_t *pdata, uint32_t data_length)
{
    uint32_t i;

    /* wait until I2C bus is idle */
    while(i2c_flag_get(I2C1, I2C_FLAG_I2CBSY));//等待总线空闲
    /* send a start condition to I2C bus */
    i2c_start_on_bus(I2C1);//发送start信号
    /* wait until SBSEND bit is set */
    while(!i2c_flag_get(I2C1, I2C_FLAG_SBSEND));    //起始位是否发送
    /* send slave address to I2C bus */
    i2c_master_addressing(I2C1, addr, I2C_TRANSMITTER);//设置从机地址和执行发送操作
    /* wait until ADDSEND bit is set */
    while(!i2c_flag_get(I2C1, I2C_FLAG_ADDSEND));//主机模式下地址是否发送
    /* clear ADDSEND bit */
    i2c_flag_clear(I2C1, I2C_FLAG_ADDSEND);//清除标志位主机模式下地址是否发送
    /* wait until the transmit data buffer is empty */
    while(!i2c_flag_get(I2C1, I2C_FLAG_TBE));//发送期间I2C_DATA为空
    for(i = 0; i < data_length; i++){
        /* data transmission */
        i2c_data_transmit(I2C1, pdata[i]);//发送数据
        /* wait until the TBE bit is set */
        while(!i2c_flag_get(I2C1, I2C_FLAG_TBE));//发送期间I2C_DATA为空
    }
    /* send a stop condition to I2C bus */
    i2c_stop_on_bus(I2C1);//在I2C总线上生成停止位
    /* wait until stop condition generate */ 
    while(I2C_CTL0(I2C1)&0x0200);  //等待直到停止条件生成  
}

OLED

查看文档可以知道地址为b0111100或者b0111101，当R/W位置写0的时候，才能进行写的操作，那么地址默认为0x78(b01111000)或者0x7A(b01111010)

参考程序

这里使用0.96OLED显示屏_STM32F103C8_IIC_V1.0来进行移植 查看工程可以知道主要是有3个文件来进行OLED的驱动，移入OLE.h .c 、oledfont.h 、 bmp.h 移入文件之后要注意导入C文件。 记得添加路径。 删除没有用的头文件 删除sys.h文件 删除delay.h文件

可以查看stdint.h

在oled.h中添加u8 u32定义 也可以直接修改

typedef unsigned          char u8;
typedef unsigned           int u32;

先把oled.h添加主程序中。

查看oled.h，可以看到IIC定义，同时也是模拟IIC，可以注释掉 查看oled.c，可以看到是模拟iic，这些都可以注释不要，我们使用的是iIC，不是模拟。 将IIC写放入oled.c中。 记得导入#include "gd32f30x_i2c.h"头文件

记得在oled.h中申明 要使用uint8和uint32，导入头文件#include "stdint.h"

IIC写一个字节可以修改为如下所示。 

/**********************************************
// IIC Write byte
**********************************************/

void Write_IIC_Byte(unsigned char IIC_Byte)
{
//    unsigned char i;
//    unsigned char m,da;
//    da=IIC_Byte;
//    OLED_SCLK_Clr();
//    for(i=0;i< 8;i++)        
//    {
//            m=da;
//        //    OLED_SCLK_Clr();
//        m=m&0x80;
//        if(m==0x80)
//        {OLED_SDIN_Set();}
//        else OLED_SDIN_Clr();
//            da=da< < 1;
//        OLED_SCLK_Set();
//        OLED_SCLK_Clr();
//        }

uint8_t byte[1] = {};    
byte[0]=IIC_Byte;
i2c_write(0x78,byte, 1);            
}

IIC写指令 向0x78设备写命令0x00的IIC_Command指令。 

/**********************************************
// IIC Write Command
**********************************************/
void Write_IIC_Command(unsigned char IIC_Command)
{
//   IIC_Start();
//   Write_IIC_Byte(0x78);            //Slave address,SA0=0
//    IIC_Wait_Ack();    
//   Write_IIC_Byte(0x00);            //write command
//    IIC_Wait_Ack();    
//   Write_IIC_Byte(IIC_Command); 
//    IIC_Wait_Ack();    
//   IIC_Stop();


    uint8_t byte[2] = {};    
    byte[0]    =0x00;
    byte[1]    =IIC_Command;    
    i2c_write(0x78,byte, 2);                
}

IIC写数据 向0x78设备写数据0x40的IIC_Data指令。 

/**********************************************
// IIC Write Data
**********************************************/
void Write_IIC_Data(unsigned char IIC_Data)
{
//   IIC_Start();
//   Write_IIC_Byte(0x78);            //D/C#=0; R/W#=0
//    IIC_Wait_Ack();    
//   Write_IIC_Byte(0x40);            //write data
//    IIC_Wait_Ack();    
//   Write_IIC_Byte(IIC_Data);
//    IIC_Wait_Ack();    
//   IIC_Stop();


    uint8_t byte[2] = {};    
    byte[0]    =0x40;
    byte[1]    =IIC_Data;    
    i2c_write(0x78,byte, 2);        

}

在oled.c中，OLED_Init初始化可以注释掉gpio初始化

在oled.c中，OLED_Init初始化中有个延时800ms。 导入 #include "systick.h" 可以使用delay_1ms(800);

取模

在oledfont.h中放入字库 

char Hzk[][32]={

// 记(0) 帖(1) 年(2) 月(3) 日(4)

{0x40,0x40,0x42,0xCC,0x00,0x00,0x00,0x84,0x84,0x84,0x84,0x84,0xFC,0x00,0x00,0x00},
{0x00,0x00,0x00,0x7F,0x20,0x10,0x00,0x3F,0x40,0x40,0x40,0x40,0x41,0x40,0x70,0x00},/*"记",0*/
/* (16 X 16 , 宋体 )*/

{0x00,0xF8,0x08,0xFF,0x08,0xF8,0x00,0x00,0x00,0x00,0xFF,0x10,0x10,0x10,0x10,0x00},
{0x00,0x0F,0x00,0xFF,0x08,0x0F,0x00,0xFF,0x41,0x41,0x41,0x41,0x41,0xFF,0x00,0x00},/*"帖",1*/
/* (16 X 16 , 宋体 )*/

{0x00,0x20,0x18,0xC7,0x44,0x44,0x44,0x44,0xFC,0x44,0x44,0x44,0x44,0x04,0x00,0x00},
{0x04,0x04,0x04,0x07,0x04,0x04,0x04,0x04,0xFF,0x04,0x04,0x04,0x04,0x04,0x04,0x00},/*"年",2*/
/* (16 X 16 , 宋体 )*/

{0x00,0x00,0x00,0xFE,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0xFE,0x00,0x00,0x00},
{0x80,0x40,0x30,0x0F,0x02,0x02,0x02,0x02,0x02,0x02,0x42,0x82,0x7F,0x00,0x00,0x00},/*"月",3*/
/* (16 X 16 , 宋体 )*/

{0x00,0x00,0x00,0xFE,0x82,0x82,0x82,0x82,0x82,0x82,0x82,0xFE,0x00,0x00,0x00,0x00},
{0x00,0x00,0x00,0xFF,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0xFF,0x00,0x00,0x00,0x00},/*"日",4*/
/* (16 X 16 , 宋体 )*/




};

在main.c中添加显示

OLED_Init();            //初始化OLED  
        OLED_Clear()      ; 
        OLED_ShowCHinese(0,0,0);//记
        OLED_ShowCHinese(16,0,1);//帖


        OLED_ShowNum(0,2,2022,4,16);//显示ASCII字符的码值             
        OLED_ShowCHinese(32,2,2);//年    
        OLED_ShowNum(48,2,9,1,16);//显示ASCII字符的码值         
        OLED_ShowCHinese(64,2,3);//月
        OLED_ShowNum(80,2,10,2,16);//显示ASCII字符的码值                 
        OLED_ShowCHinese(96,2,4);//日

字体大小只有2个

显示字符

OLED_ShowString(40,2,"ZXY",8);

图片

图片放在bmp.h中。

#ifndef __BMP_H
#define __BMP_H        

unsigned char BMP1[]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x1F,0x1F,0x1F,0x7F,0xFF,0xFF,
0xFF,0xFF,0xFF,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x0F,0x0F,
0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,
0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xC7,0xC7,0xC7,0xC4,0x04,0x04,0x04,0x07,0xFF,
0xFF,0xFF,0xFF,0x0F,0x0F,0x0F,0x0F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x8F,0x80,0x80,
0x80,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xE3,0xE3,0xE3,0xE3,0xE3,0xE3,
0xE3,0xE3,0xE3,0xE3,0xE3,0xE3,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x1F,
0x1F,0x1F,0xFF,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x8F,0x8F,0x8F,
0x8F,0x8F,0x8F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x0F,0x0F,0x0F,
0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFE,0x06,0x06,0x07,0x0F,
0xFF,0xFF,0xFF,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0xF8,0x00,0x00,
0x00,0x00,0xF8,0xF8,0xF8,0xF8,0xF8,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,
0x00,0xC7,0xC7,0xC7,0xC7,0xC7,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,
0xFF,0x00,0x00,0x00,0xFF,0xFF,0x0F,0x0F,0x0F,0xFF,0xFF,0xFF,0xFF,0xFF,0x00,0x00,
0x00,0x00,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x03,0x03,0x03,0x03,0xE3,0xE0,0xE0,0xE0,
0xE0,0xE3,0xE3,0x03,0x03,0x03,0x03,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0xF0,0xF0,0xF0,
0xFF,0xF0,0xF0,0xF0,0xFF,0xFF,0xF0,0xF0,0xF0,0xFF,0xFF,0xFF,0xFF,0xFF,0xF0,0xF0,
0xF0,0xF0,0xF0,0xF8,0xF8,0xF8,0xFF,0xFF,0xF0,0xF0,0xF0,0xF0,0xF1,0xF1,0xF1,0xF1,
0xF1,0xF1,0xF1,0xF0,0xF0,0xF0,0xF0,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,/*"D:GD32F303GD32F30x_Firmware_Library_V2.1.4_iic_oled记帖.bmp",0*/
/* (64 X 64 )*/

};


#endif

显示图片

delay_1ms(2000);
        OLED_Clear();      
        OLED_DrawBMP(0,0,64,8,BMP1);  //图片显示(图片显示慎用，生成的字表较大，会占用较多空间，FLASH空间8K以下慎用)

OLED.C

//////////////////////////////////////////////////////////////////////////////////     
//本程序只供学习使用，未经作者许可，不得用于其它任何用途
//记帖Q群:615061293
//B站视频：https://space.bilibili.com/26152390
//CSDN:https://blog.csdn.net/qq_24312945/
//  文 件 名   : main.c
//  版 本 号   : v2.0
//  作    者   : Evk123
//  生成日期   : 2014-0101
//  最近修改   : 
//  功能描述   : 0.69寸OLED 接口演示例程(STM32F103ZE系列IIC)
//              说明: 
//              ----------------------------------------------------------------
//              GND   电源地
//              VCC   接5V或3.3v电源
//              SCL   接PA5（SCL）
//              SDA   接PA7（SDA）            
//              ----------------------------------------------------------------
//记帖Q群:615061293
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////
#include "oled.h"
#include "stdlib.h"
#include "oledfont.h"       

#include "gd32f30x_i2c.h"
#include "systick.h"
//#include "delay.h"
//OLED的显存
//存放格式如下.
//[0]0 1 2 3 ... 127    
//[1]0 1 2 3 ... 127    
//[2]0 1 2 3 ... 127    
//[3]0 1 2 3 ... 127    
//[4]0 1 2 3 ... 127    
//[5]0 1 2 3 ... 127    
//[6]0 1 2 3 ... 127    
//[7]0 1 2 3 ... 127                
/**********************************************
//IIC Start
**********************************************/
/**********************************************
//IIC Start
**********************************************/
//void IIC_Start()
//{

//    OLED_SCLK_Set() ;
//    OLED_SDIN_Set();
//    OLED_SDIN_Clr();
//    OLED_SCLK_Clr();
/

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