I have ssd1306 lcd with 64x32 resolutinon connected to I2C on STM32F103. I try to place some text and line on screen but see only half of data. I think something in my init code...
uint8_t SSD1306_Init(void) {
/* Init I2C */
ssd1306_I2C_Init();
/* Check if LCD connected to I2C */
if (!ssd1306_I2C_IsDeviceConnected(SSD1306_I2C, SSD1306_I2C_ADDR)) {
/* Return false */
return 0;
}
SSD1306_WRITECOMMAND(0xAE); //display off
SSD1306_WRITECOMMAND(0x20); //Set Memory Addressing Mode
SSD1306_WRITECOMMAND(0x00); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
SSD1306_WRITECOMMAND(0xB0); //Set Page Start Address for Page Addressing Mode,0-7
SSD1306_WRITECOMMAND(0xC0); //mirror vert
SSD1306_WRITECOMMAND(0x40); //--set start line address
SSD1306_WRITECOMMAND(0x81); //--set contrast control register
SSD1306_WRITECOMMAND(0xFF);
SSD1306_WRITECOMMAND(0xA0); //--set segment re-map 0 to 127
SSD1306_WRITECOMMAND(0xA6); //--set normal display
SSD1306_WRITECOMMAND(0xA8); //--set multiplex ratio(1 to 64)
SSD1306_WRITECOMMAND(0x1F); //32 active line on display
SSD1306_WRITECOMMAND(0xA4); //0xa4,Output follows RAM content;0xa5,Output ignores RAM content
SSD1306_WRITECOMMAND(0xD3); //-set display offset
SSD1306_WRITECOMMAND(0x00); //-not offset
SSD1306_WRITECOMMAND(0xD5); //--set display clock divide ratio/oscillator frequency
SSD1306_WRITECOMMAND(0xF0); //--set divide ratio
SSD1306_WRITECOMMAND(0xD9); //--set pre-charge period
SSD1306_WRITECOMMAND(0x22); //
SSD1306_WRITECOMMAND(0xDA); //--set com pins hardware configuration
SSD1306_WRITECOMMAND(0x12);
SSD1306_WRITECOMMAND(0xDB); //--set vcomh
SSD1306_WRITECOMMAND(0x20); //0x20,0.77xVcc
SSD1306_WRITECOMMAND(0x8D); //--set DC-DC enable
SSD1306_WRITECOMMAND(0x14); //
SSD1306_WRITECOMMAND(0xAF); //--turn on SSD1306 panel
/* Clear screen */
SSD1306_Fill(SSD1306_COLOR_BLACK);
/* Update screen */
SSD1306_UpdateScreen();
/* Set default values */
SSD1306.CurrentX = 0;
SSD1306.CurrentY = 0;
/* Initialized OK */
SSD1306.Initialized = 1;
/* Return OK */
return 1;
}
main code
char* strin3 = "01234567";
SSD1306_Init();
SSD1306_GotoXY(0,0);
SSD1306_Puts(strin3, &Font_7x10, 1);
SSD1306_UpdateScreen();
SSD1306_DrawLine(1,1,63,31,1);
SSD1306_UpdateScreen();
And what i see
I try some changes in init code and I can change the shift in the vertical direction, mirror in the vertical direction. And if I send 0xA5 (All indicator ON - Output ignores RAM parameter), then I see a full screen filled.
