本帖最后由 jinglixixi 于 2020-10-23 10:10 编辑
有了程序下载和点亮LED灯的基础，我们就可以利用I/O口来尝试驱动OLED屏了，这里选的是I2C接口的OLED屏，只需占用2个I/O口，故十分节省资源，对于像HC32L110这样原本就引脚不多的芯片更是如此。 那么选哪个引脚来连接OLED屏呢？ 这里选取的是P35和P36，其中P35--- CLK，P36--- DIN。 配置这2个引脚为输出功能的函数为： - void App_OledInit(void)
- {
- Gpio_InitIOExt(3, 5, GpioDirOut, TRUE, FALSE, TRUE, FALSE);
- Gpio_InitIOExt(3, 6, GpioDirOut, TRUE, FALSE, TRUE, FALSE);
- }
是这2个引脚输出高低电平的语句为：#define OLED_SCLK_Set() Gpio_SetIO(3, 5, TRUE) #define OLED_SCLK_Clr() Gpio_SetIO(3, 5, FALSE) #define OLED_SDIN_Set() Gpio_SetIO(3, 6, TRUE) #define OLED_SDIN_Clr() Gpio_SetIO(3, 6, FALSE) 该显示屏的初始化函数为： - void OLED_Init(void)
- {
- OLED_SCLK_Set();
- OLED_SDIN_Set();
- delay1ms(800);
- OLED_WR_Byte(0xAE,OLED_CMD);//--display off
- OLED_WR_Byte(0x40,OLED_CMD);//--set start line address
- OLED_WR_Byte(0xB0,OLED_CMD);//--set page address
- OLED_WR_Byte(0xC8,OLED_CMD);//Com scan direction
- 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(0x1F,OLED_CMD);//--1/32 duty
- 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(0xf0,OLED_CMD);//
- OLED_WR_Byte(0xD9,OLED_CMD);//Set Pre-Charge Period
- OLED_WR_Byte(0x22,OLED_CMD);//
- OLED_WR_Byte(0xDA,OLED_CMD);//set com pin configuartion
- OLED_WR_Byte(0x02,OLED_CMD);//
- OLED_WR_Byte(0xDB,OLED_CMD);//set Vcomh
- OLED_WR_Byte(0x49,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();
- }
实现图1和图2显示效果的主程序为：- int32_t main(void)
- {
- delay1ms(100);
- OLED_Init();
- OLED_Clear();
- OLED_ShowString(0,0,"HC32L110 TEST",16);
- OLED_ShowString(0,2,"OLED DISPLAY",16);
- delay1ms(2000);
- OLED_Clear();
- OLED_ShowCHinese(0, 0, 3);
- OLED_ShowCHinese(16, 0, 4);
- OLED_ShowCHinese(32, 0, 5);
- OLED_ShowCHinese(48, 0, 6);
- OLED_ShowCHinese(64, 0, 7);
- OLED_ShowCHinese(0, 2, 8);
- OLED_ShowCHinese(16, 2, 9);
- OLED_ShowCHinese(32, 2, 10);
- OLED_ShowCHinese(48, 2, 11);
- OLED_ShowCHinese(64, 2, 12);
- while (1);
- }
图1 显示字符串
图2 显示汉字
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