在使用0.96寸的OLED时，发现之前的代码不能正常通过单片机的IIC使用DMA进行刷新，刷新时总是错一位，后来查阅资料发现是现在的OLED使用了SSD1315替换了SSD1306控制芯片，贴一下各个初始化过程，方便记录：
SSD1306初始化：
1 /** 2 * @brief OLED初始化 3 * @param None 4 * @retval None. 5 */ 6 void OLED_Init(void) 7 { 8 #if SENDDTA_DMA 9 I2C_DMA_WriteReg( (uint8_t*)OLED_Init_CMD, OLED_ADDRESS,OLED_WriteCom_Addr,sizeof(OLED_Init_CMD)); //sizeof(OLED_Init_CMD) 10 #else 11 // DelayMs(100); //这里的延时很重要 12 delay_ms(10); 13 WriteCmd(0xAE); //display off 14 WriteCmd(0x20); //Set Memory Addressing Mode 15 WriteCmd(0x10); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid 16 WriteCmd(0xb0); //Set Page Start Address for Page Addressing Mode,0-7 17 WriteCmd(0xc8); //Set COM Output Scan Direction 18 WriteCmd(0x00); //---set low column address 19 WriteCmd(0x10); //---set high column address 20 WriteCmd(0x40); //--set start line address 21 WriteCmd(0x81); //--set contrast control register 22 WriteCmd(0xff); //亮度调节 0x00~0xff 23 WriteCmd(0xa1); //--set segment re-map 0 to 127 24 WriteCmd(0xa6); //--set normal display 25 WriteCmd(0xa8); //--set multiplex ratio(1 to 64) 26 WriteCmd(0x3F); // 27 WriteCmd(0xa4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content 28 WriteCmd(0xd3); //-set display offset 29 WriteCmd(0x00); //-not offset 30 WriteCmd(0xd5); //--set display clock divide ratio/oscillator frequency 31 WriteCmd(0xf0); //--set divide ratio 32 WriteCmd(0xd9); //--set pre-charge period 33 WriteCmd(0x22); // 34 WriteCmd(0xda); //--set com pins hardware configuration 35 WriteCmd(0x12); 36 WriteCmd(0xdb); //--set vcomh 37 WriteCmd(0x20); //0x20,0.77xVcc 38 WriteCmd(0x8d); //--set DC-DC enable 39 WriteCmd(0x14); // 40 WriteCmd(0xaf); //--turn on oled panel 41 #endif 42 }
这里使用默认是刷新方式，按照页写数据没有问题，使用DMA时需要把照寻址方式修改为了水平寻址时就出现了刷新数据不对的问题
为此，我直接使用了网络上默认的方式对DMA发送指令进行初始化
const uint8_t OLED_Init_CMD[] = { 0xAE,0x00,0x10,0x40,0xB0,0x81,0xFF,0xA1,0xA6,0xA8, 0x3F,0xC8,0xD3,0x00,0xD5,0x80,0xD8,0x05,0xD9,0xF1, 0xDA,0x12,0xDB,0x30,0x8D,0x14,0xAF,0x20,0x00 };
发现使用改方式刷新SSD1315类型的OLED时会出问题，对其进行修改：
const uint8_t OLED_Init_CMD[] = { 0xae,0x00,0x10,0x40,0x81,0xcf,0xa1,0xc8,0xa6,0xa8, 0x3f,0xd3,0x00,0xd5,0x80,0xd9,0xf1,0xda,0x12,0xdb, 0x40,0x20,0x00,0x8d,0x14,0xa4,0xa6,0xaf };
立刻正常，看来两个片子的工作模式还是有些区别的