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標題: OKdo E1開發板驅動雙色OLED屏顯示 [打印本頁]
作者: jinglixixi    時間: 2020-11-3 00:24
標題: OKdo E1開發板驅動雙色OLED屏顯示
OKdo E1開發板是一款以硬幣大小而為人稱道的開發板，它體積小巧那自然要為它配置一塊同樣小巧的顯示屏才稱得上是絕配，下面就通過I/O口來模擬I2C通訊了，使得OLED屏能夠顯示出信息來。
OLED屏與MCU的連接關系為：
SCL---PIO0_7
SDA---PIO1_0

相關引腳輸出高低電平的語句定義：
#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屏引腳配置函數：
  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屏初始化函數：
  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屏顯示主程序：
  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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經程序的編譯下載，其運行效果如圖所示。

OLED屏顯示效果




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