本帖最后由 stb988 于 2024-5-6 15:40 编辑
#每日话题# #申请原创# 外接了一块SSD1306驱动芯片的OLDE屏，用OLED屏来显示APM32F411V芯片自带的RTC时间，本来想用自带的IIC驱动来驱动oled,测试了一下，没有显示成功，索性就直接用模拟iiC实现吧，接的单片机PB6和PB7,查了数据手册，硬件iic也是这两个接口。
接好线
移植网上的例程，发现能显示，但是显示一会会卡死，后来发现是写入速度太快，我把GPIO口调慢，和显示点的函数也加了空指令延时就解决了。
- GPIO_Config_T gpioConfigStruct;
-
- /* Enable the GPIO_LED Clock */
- RCM_EnableAHB1PeriphClock(RCM_AHB1_PERIPH_GPIOB);
- /* Configure the GPIO_LED pin */
- GPIO_ConfigStructInit(&gpioConfigStruct);
- gpioConfigStruct.pin = GPIO_PIN_6|GPIO_PIN_7;
- gpioConfigStruct.mode = GPIO_MODE_OUT;
- gpioConfigStruct.speed = GPIO_SPEED_25MHz;
-
- GPIO_Config(GPIOB, &gpioConfigStruct);
- GPIOB->BSCL = GPIO_PIN_6|GPIO_PIN_7;
还有一个在oled初始化时，发现也必须延时一段时间，否则上电会显示倒的图像，还会显示亮度不够，
- //OLED_RES_Clr();
- delay_ms(1000);
- // OLED_RES_Set();
-
- OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel
- 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 Set Mapping RAM Display Start Line (0x00~0x3F)
- OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register
- OLED_WR_Byte(0xCF,OLED_CMD);// Set SEG Output Current Brightness
- OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常
- OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常
- OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display
- OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)
- OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty
- OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F)
- OLED_WR_Byte(0x00,OLED_CMD);//-not offset
- OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency
- OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec
- OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period
- OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock
- OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration
- OLED_WR_Byte(0x12,OLED_CMD);
- OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh
- OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level
- OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02)
- OLED_WR_Byte(0x02,OLED_CMD);//
- OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable
- OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable
- OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)
- OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)
- OLED_Clear();
- OLED_WR_Byte(0xAF,OLED_CMD);
这是显示效果。
APM32F411_OLED.rar
(7.87 MB, 下载次数: 1)
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