NUCLEO-H533RE开发板测评06（IIC应用）

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NUCLEO-H533RE开发板测评06（IIC应用） [复制链接]

<div class='showpostmsg'>## 6：IIC驱动

使用硬件IIC来驱动OLED显示，查看板子的IIC接口。

![image-20240807160214538](https://boreyun.oss-cn-shanghai.aliyuncs.com/image-20240807160214538.png)

OLED显示接口：

![image-20240807160401461](https://boreyun.oss-cn-shanghai.aliyuncs.com/image-20240807160401461.png)

cubemx配置接口

![image-20240807160454509](https://boreyun.oss-cn-shanghai.aliyuncs.com/image-20240807160454509.png)

配置参数选择默认就好，IIC速度为100KHz；

IIC通讯时序图：

![image-20240807160959714](https://boreyun.oss-cn-shanghai.aliyuncs.com/image-20240807160959714.png)

程序编写：

IIC初始化配置：

```C
I2C_HandleTypeDef hi2c1;

/* I2C1 init function */
void MX_I2C1_Init(void)
{

/* USER CODE BEGIN I2C1_Init 0 */

/* USER CODE END I2C1_Init 0 */

/* USER CODE BEGIN I2C1_Init 1 */

/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x10909CEC;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
  Error_Handler();
}

/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
  Error_Handler();
}

/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
  Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */

/* USER CODE END I2C1_Init 2 */

}
```

关键的IIC读写函数

```
uint8_t CMD_Data[25]={

0xAE,//关闭显示
   0xD5,//设置时钟分频因子,震荡频率
   0x80,//[3:0],分频因子;[7:4],震荡频率

0xA8,//设置驱动路数
   0X3F,//默认0X3F(1/64)
   0xD3,//设置显示偏移
   0X00,//默认为0
   0x40,//设置显示开始行 [5:0],行数.          
   0x8D,//电荷泵设置
   0x14,//bit2，开启/关闭
   0x20,//设置内存地址模式
   0x02,//[1:0],00，列地址模式;01，行地址模式;10,页地址模式;默认10;
   0xA1,//段重定义设置,bit0:0,0->0;1,0->127;
   0xC8,//设置COM扫描方向;bit3:0,普通模式;1,重定义模式 COM[N-1]->COM0;N:驱动路数
   0xDA,//设置COM硬件引脚配置
   0x12,//[5:4]配置    
   0x81,//对比度设置
   0xEF,//1~255;默认0X7F (亮度设置,越大越亮)
   0xD9,//设置预充电周期
   0xf1,//[3:0],PHASE 1;[7:4],PHASE 2;
   0xDB,//设置VCOMH 电压倍率
   0x30,//[6:4] 000,0.65*vcc;001,0.77*vcc;011,0.83*vcc;
   0xA4,//全局显示开启;bit0:1,开启;0,关闭;(白屏/黑屏)
   0xA6,//设置显示方式;bit0:1,反相显示;0,正常显示  
   0xAF,//开启显示

};  //初始化命令

#define OLED_ADDRESS 0x78

void WriteCmd_init(void)
{
    uint8_t i = 0;
    for(i=0; i<25; i++)
    {
        HAL_I2C_Mem_Write(&hi2c1 ,OLED_ADDRESS,0x00,I2C_MEMADD_SIZE_8BIT,CMD_Data+i,1,0x100);
    }
}

void OLED_WR_CMD(uint8_t cmd)
{
    HAL_I2C_Mem_Write(&hi2c1 ,OLED_ADDRESS,0x00,I2C_MEMADD_SIZE_8BIT,&cmd,1,0x100);
}

void OLED_WR_DATA(uint8_t data)
{
    HAL_I2C_Mem_Write(&hi2c1 ,OLED_ADDRESS,0x40,I2C_MEMADD_SIZE_8BIT,&data,1,0x100);
}

```

显示英文字符和中文字符函数：

```
//显示一个字符号串
void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t Char_Size)
{
    unsigned char j=0;
    while (chr[j]!='\0')
    {        OLED_ShowChar(x,y,chr[j],Char_Size);
            x+=8;
        if(x>120){x=0;y+=2;}
            j++;
    }
}

void OLED_P8x16Str(uint8_t x,uint8_t y,uint8_t ch[])
{
    uint8_t c=0,i=0,j=0;
    while (ch[j]!='\0')
    {
        c =ch[j]-32;
        if(x>120){x=0;y++;}
        OLED_Set_Pos(x,y);
        for(i=0;i<8;i++)
        OLED_WR_DATA(F8X16[c*16+i]);
        OLED_Set_Pos(x,y+1);
        for(i=0;i<8;i++)
        OLED_WR_DATA(F8X16[c*16+i+8]);
        x+=8;
        j++;
    }
}

```

使用取模软件取中文字体编码：

```
//共阴——列行式——逆向输出
typedef struct
{
  unsigned char Index[2];
  unsigned char Msk[32];
} typFNT_GB16;

static const typFNT_GB16 tfont16[] =
{
"温",0x10,0x60,0x02,0x8C,0x00,0x00,0xFE,0x92,0x92,0x92,0x92,0x92,0xFE,0x00,0x00,0x00,
0x04,0x04,0x7E,0x01,0x40,0x7E,0x42,0x42,0x7E,0x42,0x7E,0x42,0x42,0x7E,0x40,0x00,/*"温",3*/
"度",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",4*/ 
};
```

![image-20240807161830315](https://boreyun.oss-cn-shanghai.aliyuncs.com/image-20240807161830315.png)

最后在主程序中调用显示：

```
/* USER CODE BEGIN 2 */
    OLED_Init();
/* USER CODE END 2 */

/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
  /* USER CODE END WHILE */

/* USER CODE BEGIN 3 */

//    OLED_Clear();
    OLED_P8x16Str(0,0,"Hello World");
    OLED_P8x16Str(0,2,"STM32H533_OLED");
    LCD_ShowChinese16x16(0, 4,(uint8_t*)"温",16);
  LCD_ShowChinese16x16(16,4,(uint8_t*)"度",16);
    OLED_P8x16Str(0,6,"Hello World");

printf("123");
    HAL_Delay(500);
    
}
/* USER CODE END 3 */
```

显示结果：

![image-20240807162147079](https://boreyun.oss-cn-shanghai.aliyuncs.com/image-20240807162147079.png)</div><script>					var loginstr = '<div class="locked">查看本帖全部内容，请<a href="javascript:;"   style="color:#e60000" class="loginf">登录</a>或者<a href="https://bbs.eeworld.com.cn/member.php?mod=register_eeworld.php&action=wechat" style="color:#e60000" target="_blank">注册</a></div>';
					
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