雅特力车规级MCU-AT32A403A开发板评测 05 0.96寸OLED模块显示 IIC接口

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雅特力车规级MCU-AT32A403A开发板评测 05 0.96寸OLED模块显示 IIC接口 [复制链接]

<div class='showpostmsg'>### 雅特力车规级MCU-AT32A403A开发板评测 05 0.96寸OLED模块显示 IIC接口

## 1.软硬件平台

1. AT32A403A Board开发板

2. MDK-ARM Keil

3. 0.96寸 IIC接口 OLED显示模块

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## 2. OLED 显示函数支持

1.OLED 显示字符、字符串 汉字

```c
void OLED_ShowChar_06x08(uint8_t X, uint8_t Y, uint8_t Char);//显示字符函数
void OLED_ShowString_06x08(uint8_t X, uint8_t Y, uint8_t *String);//显示字符串函数
void OLED_ShowCHinese(uint8_t X,uint8_t Y,uint8_t Chinese);//显示汉字函数
void OLED_ShowChar_08x16(uint8_t X, uint8_t Y, uint8_t Char);//显示字符函数
void OLED_ShowString_16x16(uint8_t X, uint8_t Y, uint8_t *String);//显示字符串函数
```

2.OLED 显示整型数字/浮点型数字/二进制数字/十六进制数字

```c
void OLED_ShowNumber_SignedInteger_06x08(uint8_t X, uint8_t Y, int16_t IntegerNumber, uint8_t Count);//显示有符号整型数字函数
void OLED_ShowNumber_UnsignedInteger_06x08(uint8_t X, uint8_t Y, uint16_t IntegerNumber, uint8_t Count);//显显示无符号整型数字函数
void OLED_ShowNumber_Float_06x08(uint8_t X, uint8_t Y, float FloatNumber, uint8_t Count1, uint8_t Count2);//显示浮点数函数
void OLED_ShowNumber_Binary_06x08(uint8_t X, uint8_t Y, unsigned long BinaryNumber, uint8_t Count);//显示数组函数
void OLED_ShowNumber_Hex_06x08(uint8_t X, uint8_t Y, unsigned long BinaryNumber, uint8_t Count);//显示十六进制数字函数

```

3.OLED 基本绘图函数

```c
//OLED 绘制直线
void OLED_DrawLine(uint8_t X, uint8_t Y, uint8_t PointData);
//OLED 绘制图像
void OLED_RollDisplay(void);//设置水平左右移
void Draw_BMP(uint8_t x0,uint8_t y0,uint8_t x1,uint8_t y1,uint8_t BMP[]);
//画点函数
void OLED_DrawDot(uint8_t X,uint8_t Y,uint8_t T);
//画直线函数
void LCD_DrawLine(uint32_t X1, uint32_t Y1, uint32_t X2,uint32_t Y2);
//dot ==1 表示亮显示出来
void OLED_Fill_Draw_circle(uint8_t X0,uint8_t Y0,uint8_t r,uint8_t dot);
//ucFilled ==1 表示填充 //画直圆函数
void OLED_DrawCircle( uint16_t usX_Center, uint16_t usY_Center, uint16_t usRadius, uint8_t ucFilled );
//画矩形函数
void LCD_DrawRectangle(uint16_t X1, uint16_t Y1, uint16_t X2, uint16_t Y2);
```

### 3.模拟IIC移植 OLED屏幕驱动

1. 建立工程模板，添加相关驱动文件

在之前的工程模板上进行添加文件，同时oled部分代码参考梁山派GD32F4开发板资料进行。

olde_drive.c olde_drive.h // oled底层驱动文件，包括软件iic实现，oled引脚配置，oled初始化.

olde_draw.c olde_draw.h // oled应用层文件，主要是绘图api实现（可以移植到其他开发板，不需要改，仅配置好驱动文件即可

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2. 配置引脚

选择引脚，进入工程开始编写屏幕引脚初始化代码。

为了方便后续移植，我在**oled_drive.h**处宏定义了每一个引脚，后续根据需要进行修改即可。

```c
 #define OLED_GPIO_PORT GPIOA
 #define OLED_GPIO_CLOCKCRM_GPIOA_PERIPH_CLOCK
 
 #define SCL_GPIO_PORT    GPIOA
 #define SCL_GPIO_PIN     GPIO_PINS_5
 #define SCL_GPIO_CLK_ENABLE()  CRM_GPIOA_PERIPH_CLOCK
 
 #define SDA_GPIO_PORT    GPIOA
 #define SDA_GPIO_PIN     GPIO_PINS_6
 #define SDA_GPIO_CLK_ENABLE()  CRM_GPIOA_PERIPH_CLOCK
 
 ```

3. 屏幕GPIO端口初始化配置

```c
 void OLED_GPIO_Configuare(void)
 {
 
 gpio_init_type gpio_init_struct;
 
 /* enable the gpioa clock */
 crm_periph_clock_enable(OLED_GPIO_CLOCK, TRUE);
 
 /* set default parameter */
 gpio_default_para_init(&gpio_init_struct);
 
 /* configure the gpio */
 gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
 gpio_init_struct.gpio_out_type= GPIO_OUTPUT_PUSH_PULL;
 gpio_init_struct.gpio_mode = GPIO_MODE_OUTPUT;
 gpio_init_struct.gpio_pins = SDA_GPIO_PIN |SCL_GPIO_PIN;
 gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
 gpio_init(OLED_GPIO_PORT, &gpio_init_struct);
 }
 ```

4. IIC接口宏定义设置

```C
 //-----------------OLED IIC端口定义----------------                     
 
 #define OLED_SCLK_Clr() gpio_bits_reset(SCL_GPIO_PORT,SCL_GPIO_PIN)//SCL IIC接口的时钟信号
 #define OLED_SCLK_Set() gpio_bits_set(SCL_GPIO_PORT,SCL_GPIO_PIN)
 
 #define OLED_SDIN_Clr() gpio_bits_reset(SDA_GPIO_PORT,SDA_GPIO_PIN)//SDA IIC接口的数据信号
 #define OLED_SDIN_Set() gpio_bits_set(SDA_GPIO_PORT,SDA_GPIO_PIN)
 ```

5. 软件IIC代码实现

```c
 //==================================================================================================
 //函数功能: IIC外设驱动函数部分
 //函数标记: IIC_Start
 //函数说明: 无
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void IIC_Start()
 {
     OLED_SCLK_Set() ;
     OLED_SDIN_Set();
     OLED_SDIN_Clr();
     OLED_SCLK_Clr();
 }
 //==================================================================================================
 //函数功能: IIC外设驱动函数部分
 //函数标记: IIC_Stop
 //函数说明: 无
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void IIC_Stop()
 {
   OLED_SCLK_Set() ;
     OLED_SDIN_Clr();
     OLED_SDIN_Set();    
 }
 //==================================================================================================
 //函数功能: IIC外设驱动函数部分
 //函数标记: IIC_Stop
 //函数说明: 无
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void IIC_Wait_Ack()
 {
     OLED_SCLK_Set() ;
     OLED_SCLK_Clr();
 }
 //==================================================================================================
 //函数功能: IIC外设驱动函数部分
 //函数标记: Write_IIC_Byte
 //函数说明: 无
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void Write_IIC_Byte(uint8_t IIC_Byte)
 {
     uint8_t i;
     uint8_t 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();
 }
 
 }
 //==================================================================================================
 //函数功能: IIC外设驱动函数部分
 //函数标记: Write_IIC_Command
 //函数说明: 无
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void Write_IIC_Command(uint8_t 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();
 }
 //==================================================================================================
 //函数功能: IIC外设驱动函数部分
 //函数标记: Write_IIC_Data
 //函数说明: 无
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void Write_IIC_Data(uint8_t 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();
 }
 ```

6. OLED初始化函数

```c
 //==================================================================================================
 //函数功能: OLED 外设驱动函数部分
 //函数标记: OLED_Init
 //函数说明: 初始化函数配置
 //-------------------------------------------------------------------------------------------------
 //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
 //==================================================================================================
 void OLED_Init(void)
 {     
   OLED_GPIO_Configuare();
   OLED_WR_Byte(0xAE,OLED_CMD);//--display off
     OLED_WR_Byte(0x00,OLED_CMD);//---set low column address
     OLED_WR_Byte(0x10,OLED_CMD);//---set high column address
     OLED_WR_Byte(0x40,OLED_CMD);//--set start line address
     OLED_WR_Byte(0xB0,OLED_CMD);//--set page address
     OLED_WR_Byte(0x81,OLED_CMD); // contract control
     OLED_WR_Byte(0xFF,OLED_CMD);//--128 
     OLED_WR_Byte(0xA1,OLED_CMD);//set segment remap 
     OLED_WR_Byte(0xA6,OLED_CMD);//--normal / reverse
     OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
     OLED_WR_Byte(0x3F,OLED_CMD);//--1/32 duty
     OLED_WR_Byte(0xC8,OLED_CMD);//Com scan direction
     OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset
     OLED_WR_Byte(0x00,OLED_CMD);//
   
     OLED_WR_Byte(0xD5,OLED_CMD);//set osc division
     OLED_WR_Byte(0x80,OLED_CMD);//
     
     OLED_WR_Byte(0xD8,OLED_CMD);//set area color mode off
     OLED_WR_Byte(0x05,OLED_CMD);//
     
     OLED_WR_Byte(0xD9,OLED_CMD);//Set Pre-Charge Period
     OLED_WR_Byte(0xF1,OLED_CMD);//
     
     OLED_WR_Byte(0xDA,OLED_CMD);//set com pin configuartion
     OLED_WR_Byte(0x12,OLED_CMD);//
     
     OLED_WR_Byte(0xDB,OLED_CMD);//set Vcomh
     OLED_WR_Byte(0x30,OLED_CMD);//
     
     OLED_WR_Byte(0x8D,OLED_CMD);//set charge pump enable
     OLED_WR_Byte(0x14,OLED_CMD);//
     
     OLED_WR_Byte(0xAF,OLED_CMD);//--turn on oled panel
     
 
     OLED_Clear();
     OLED_Set_Pos(0,0);
 }
 ```

综上所述，软件模拟IIC 驱动OLED文件完成，接下来就是应用层文件,具体参考仓库代码。
模拟IIC 驱动OLED [模拟IIC 驱动OLED](https://gitee.com/End-ING/embedded-arterytek32-board/tree/master/note/code/at32a403_mdk_oled_iic_template/at32a403_mdk_oled_softiic_template "模拟IIC 驱动OLED")

### 4.硬件IIC移植 OLED屏幕驱动

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```c
 i2c_handle_type hi2cx;
 ```

1. 建立工程模板，在软件模拟工程IIC基础上进行修改，添加宏定义进行操作

olde_drive.c olde_drive.h // oled底层驱动文件，包括硬件iic初始化

olde_draw.c olde_draw.h // oled应用层文件，主要是绘图api实现

2. 配置引脚

选择引脚，进入工程开始编写屏幕引脚初始化代码。

为了方便后续移植，我在**oled_drive.h**处宏定义了每一个引脚，后续根据需要进行修改即可。

```c
  #define I2C_TIMEOUT        0xFFFFFFFF
  
  #define I2Cx_ADDRESS       0x78
  
  #define I2Cx_PORT        I2C1
  #define I2Cx_CLK         CRM_I2C1_PERIPH_CLOCK
  #define I2Cx_DMA         DMA1
  #define I2Cx_DMA_CLK       CRM_DMA1_PERIPH_CLOCK
  
  #define I2Cx_SCL_GPIO_CLK      CRM_GPIOB_PERIPH_CLOCK
  #define I2Cx_SCL_GPIO_PIN      GPIO_PINS_6
  #define I2Cx_SCL_GPIO_PinsSource   GPIO_PINS_SOURCE6
  #define I2Cx_SCL_GPIO_PORT     GPIOB
  #define I2Cx_SCL_GPIO_MUX      GPIO_MUX_4
  
  #define I2Cx_SDA_GPIO_CLK      CRM_GPIOB_PERIPH_CLOCK
  #define I2Cx_SDA_GPIO_PIN      GPIO_PINS_7
  #define I2Cx_SDA_GPIO_PinsSource   GPIO_PINS_SOURCE7
  #define I2Cx_SDA_GPIO_PORT     GPIOB
  #define I2Cx_SDA_GPIO_MUX      GPIO_MUX_4
  #define I2Cx_CLKCTRL       0x10F03C6A //200K
  
  ```

3. IIC1初始化配置

```c
  void I2C_Init(i2c_handle_type* hi2c)
  {
  /* reset i2c peripheral */
  i2c_reset(hi2c->i2cx);
  /* i2c peripheral initialization */
  if(hi2c->i2cx == I2C1)
  {
    gpio_init_type gpio_init_struct;
    crm_periph_clock_enable(CRM_I2C1_PERIPH_CLOCK, TRUE);
    crm_periph_clock_enable(CRM_GPIOB_PERIPH_CLOCK, TRUE);
    gpio_default_para_init(&gpio_init_struct);
  
    /* configure the SCL pin */
    gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;
    gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
    gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
    gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;
    gpio_init_struct.gpio_pins = I2Cx_SCL_GPIO_PIN;
    gpio_init(GPIOB, &gpio_init_struct);
  
    /* configure the SDA pin */
    gpio_init_struct.gpio_out_type = GPIO_OUTPUT_OPEN_DRAIN;
    gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
    gpio_init_struct.gpio_mode = GPIO_MODE_MUX;
    gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_MODERATE;
    gpio_init_struct.gpio_pins = I2Cx_SDA_GPIO_PIN;
    gpio_init(GPIOB, &gpio_init_struct);
  
    i2c_init(I2C1, I2C_FSMODE_DUTY_2_1, 100000);
    i2c_own_address1_set(I2C1, I2C_ADDRESS_MODE_7BIT, 0x00);
    i2c_ack_enable(I2C1, TRUE);
    i2c_clock_stretch_enable(I2C1, TRUE);
    i2c_general_call_enable(I2C1, FALSE);
  
    i2c_enable(I2C1, TRUE);
  }
  }
  ```

4. i2c_config_init

```c
  static void i2c_config_init(void)
  {
    hi2cx.i2cx = I2C1;
    I2C_Init(&hi2cx);
  }
  ```

5. 修改Write_IIC_Byte，Write_IIC_Data，Write_IIC_Command函数

IIC_Config 切换软硬件IIC

```c
  #defineIIC_Config0 //IIC_Config=0 使用硬件IICIIC_Config=1 使用软件IIC 
  ```

```c
  //==================================================================================================
  //函数功能: IIC外设驱动函数部分
  //函数标记: Write_IIC_Byte
  //函数说明: 无
  //-------------------------------------------------------------------------------------------------
  //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
  //==================================================================================================
  void Write_IIC_Byte(uint8_t IIC_Byte)
  {
    i2c_status_type i2c_status;
    
    #if IIC_Config
      uint8_t i;
      uint8_t 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;
    delay_us(3);
          OLED_SCLK_Set();
    delay_us(3);
          OLED_SCLK_Clr();
    delay_us(3);
    }
    #else
    uint8_t buff[2] = {0};
      buff[0] = IIC_Byte;
      i2c_status = i2c_master_transmit(&hi2cx, I2Cx_ADDRESS, buff, 1, 1000);
      if(i2c_status != I2C_OK)
      {
          printf("erro send %d",i2c_status);
      }
    #endif
  
  }
  //==================================================================================================
  //函数功能: IIC外设驱动函数部分
  //函数标记: Write_IIC_Command
  //函数说明: 无
  //-------------------------------------------------------------------------------------------------
  //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
  //==================================================================================================
  void Write_IIC_Command(uint8_t IIC_Command)
  {
   i2c_status_type i2c_status;
   #if IIC_Config
   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();
   #else
   uint8_t buff[2] = {0};
      buff[0] = 0x00;
      buff[1] = IIC_Command;
      i2c_status = i2c_master_transmit(&hi2cx, I2Cx_ADDRESS, buff, 2, 1000);
      if(i2c_status != I2C_OK)
      {
          printf("erro send %d",i2c_status);
      } 
   #endif
  }
  //==================================================================================================
  //函数功能: IIC外设驱动函数部分
  //函数标记: Write_IIC_Data
  //函数说明: 无
  //-------------------------------------------------------------------------------------------------
  //| - | - | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 
  //==================================================================================================
  void Write_IIC_Data(uint8_t IIC_Data)
  {
    i2c_status_type i2c_status;
    #if IIC_Config
    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();
    #else
    uint8_t buff[2] = {0};
      buff[0] = 0x40;
      buff[1] = IIC_Data;
      i2c_status = i2c_master_transmit(&hi2cx, I2Cx_ADDRESS, buff, 2, 1000);
      if(i2c_status != I2C_OK)
      {
          printf("erro send %d",i2c_status);
      }
    #endif
  }
  ```

6. OLED初始化

```c
  void OLED_Init(void)
  {     
    #if IIC_Config
    OLED_GPIO_Configuare();//软件IIC使用
    #else
    i2c_config_init();   //硬件IIC使用
    #endif
    OLED_WR_Byte(0xAE,OLED_CMD);//--display off
    ....省略初始化代码
  }
  ```
[硬件IIC 驱动OLED](https://gitee.com/End-ING/embedded-arterytek32-board/tree/master/note/code/at32a403_mdk_oled_iic_template/at32a403_mdk_oled_hardiic_template "硬件IIC 驱动OLED")

### 5.案例测试

1. 主函数
 
```c
#include "main.h"

/** @addtogroup AT32A403A_periph_examples
* @{
*/

/** @addtogroup 403A_USART_printf USART_printf
* @{
*/

//__IO uint32_t time_cnt = 0;

void oled_example(void)
{
  OLED_ShowChar_08x16(0,0,'A');
  OLED_ShowString_08x16(16,0,"AT32A403A-OLED");
//  OLED_ShowNumber_SignedInteger_06x08(16,2,1234,5);
//  OLED_ShowNumber_UnsignedInteger_06x08(64,2,1234,4);
  OLED_ShowString_08x16(0,2,"Time:2024.02.13");
  OLED_ShowNumber_Float_06x08(32,4,123.456,3,3);
  OLED_ShowString_06x08(32,5,"By:CoderEnd");

OLED_ShowCHinese(0,6,13);
  OLED_ShowCHinese(16,6,14);
  OLED_ShowCHinese(32,6,15);
  OLED_ShowCHinese(48,6,16);
  OLED_ShowCHinese(64,6,17);
 #if IIC_Config 
  OLED_ShowString_06x08(80,6,"soft-iic");
 #else
  OLED_ShowString_06x08(80,6,"hard-iic");
 #endif
}

/**
* @briefmain function.
* @paramnone
* @retval none
*/
int main(void)
{
//unsigned char count_num; 
system_clock_config();
at32_board_init();
uart_print_init(115200);
module_smg_gpio_iint();

OLED_Init();
/* output a message on hyperterminal using printf function */
//printf("usart printf example: retarget the c library printf function to the usart\r\n");
printf("Hardware_Init [ok] \r\n");
printf("at_start_a403a board testing 2024-02-12\r\n");
printf("at_start_a403a board module hardiic oled \r\n");
OLED_Clear();
printf("oled_example_test [ok] \r\n");
oled_example();
while(1)
{
  
}
}

```

2. 测试效果

软件IIC

<ignore_js_op>

<a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_785919" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=785919&handlekey=savephoto_785919">保存到相册</a>

</p>

</div>
<div class="tip_horn"></div>
</div>

</ignore_js_op>

硬件IIC

<ignore_js_op>

<a href="javascript:;" onclick="showWindow(this.id, this.getAttribute('url'), 'get', 0);" id="savephoto_785918" url="home.php?mod=spacecp&ac=album&op=saveforumphoto&aid=785918&handlekey=savephoto_785918">保存到相册</a>

</p>

</div>
<div class="tip_horn"></div>
</div>

</ignore_js_op>

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雅特力车规级MCU-AT32A403A开发板评测 05 0.96寸OLED模块显示 IIC接口 [复制链接]

浏览过的版块