OKdo E1开发板驱动双色OLED屏显示

OKdo E1开发板是一款以硬币大小而为人称道的开发板，它体积小巧那自然要为它配置一块同样小巧的显示屏才称得上是绝配，下面就通过I/O口来模拟I2C通讯了，使得OLED屏能够显示出信息来。

OLED屏与MCU的连接关系为：

SCL---PIO0_7

SDA---PIO1_0

相关引脚输出高低电平的语句定义：

#define OLED_SCLK_Clr()  GPIO_PinWrite(GPIO, 0u, 7u, 0)

#define OLED_SCLK_Set()  GPIO_PinWrite(GPIO, 0u, 7u, 1)

#define OLED_SDIN_Clr()  GPIO_PinWrite(GPIO, 1u, 0u, 0)

#define OLED_SDIN_Set()  GPIO_PinWrite(GPIO, 1u, 0u, 1)

OLED屏引脚配置函数：

1. void app_oled_init(void)
   
2. {
   
3. gpio_pin_config_t   gpioPinConfig;
   
4. gpioPinConfig.pinDirection = kGPIO_DigitalOutput;
   
5. gpioPinConfig.outputLogic  = 1u;
   
6. GPIO_PinInit (GPIO, 0u, 7u, &gpioPinConfig);
   
7. GPIO_PinInit (GPIO, 1u, 0u, &gpioPinConfig);
   
8. }

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OLED屏初始化函数：

1. void OLED_Init(void)
   
2. {
   
3. Write_IIC_Command(0xAE); //display off
   
4. Write_IIC_Command(0x20); //Set Memory Addressing Mode
   
5. Write_IIC_Command(0x10);
   
6. Write_IIC_Command(0xb0);//Set Page Start Address for Page Addressing Mode,0-7
   
7. Write_IIC_Command(0xc8);//Set COM Output Scan Direction
   
8. Write_IIC_Command(0x00);//---set low column address
   
9. Write_IIC_Command(0x10);//---set high column address
   
10. Write_IIC_Command(0x40);//--set start line address
    
11. Write_IIC_Command(0x81);//--set contrast control register
    
12. Write_IIC_Command(0xdf);
    
13. Write_IIC_Command(0xa1);//--set segment re-map 0 to 127
    
14. Write_IIC_Command(0xa6);//--set normal display
    
15. Write_IIC_Command(0xa8);//--set multiplex ratio(1 to 64)
    
16. Write_IIC_Command(0x3F);//
    
17. Write_IIC_Command(0xa4);//0xa4,Output follows RAM content;0xa5,Output ignores RAM content
    
18. Write_IIC_Command(0xd3);//-set display offset
    
19. Write_IIC_Command(0x00);//-not offset
    
20. Write_IIC_Command(0xd5);//--set display clock divide ratio/oscillator frequency
    
21. Write_IIC_Command(0xf0);//--set divide ratio
    
22. Write_IIC_Command(0xd9);//--set pre-charge period
    
23. Write_IIC_Command(0x22); //
    
24. Write_IIC_Command(0xda);//--set com pins hardware configuration
    
25. Write_IIC_Command(0x12);
    
26. Write_IIC_Command(0xdb);//--set vcomh
    
27. Write_IIC_Command(0x20);//0x20,0.77xVcc
    
28. Write_IIC_Command(0x8d);//--set DC-DC enable
    
29. Write_IIC_Command(0x14);//
    
30. Write_IIC_Command(0xaf);//--turn on oled panel
    
31. }

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OLED屏显示主程序：

1. int main(void)
   
2. {
   
3. POWER_SetBodVbatLevel(kPOWER_BodVbatLevel1650mv, kPOWER_BodHystLevel50mv, false);
   
4. CLOCK_EnableClock(kCLOCK_Gpio0);
   
5. CLOCK_EnableClock(kCLOCK_Gpio1);
   
6. BOARD_BootClockFROHF96M();
   
7. app_oled_init();
   
8. OLED_Init();
   
9. OLED_Clear();
   
10. OLED_ShowString(0,0,"OKDOE1 TEST",16);
    
11. OLED_ShowString(0,2,"OLED Display",16);
    
12. OLED_ShowString(0,4,"jinglixixi",16);
    
13. OLED_ShowString(0,6,"2020.11.2",16);
    
14. while (1)；
    
15. }

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经程序的编译下载，其运行效果如图所示。

OLED屏显示效果