version 0.0
rev 28/09/2021


OLED 0,96" Jaune et Bleu , I2C1 Hw MikroC
avec Fonctions grafiques et images BMP(2021)

LCD OLED 0.96" (25x15mm) grafique 128x32 , PIC 18F26K22
(2021)

L'afficheur :

OLED LCD Display Module IIC I2C 0.96" 128x64 ou 128x32 ?

Description :
OLED display, no need backlight, self-illumination, the display performance is better than the traditional LCD display, also lower consumption.
Driver IC: SSD1306
Size: 0.96 inch OLED
Resolution: 128 x 64 ???
Dimensions: board= 28 x 28 mm, mais Display=25 mm x 15 mm utile ONLY !
IIC interface , Device Adresse fixe= 0x78 (8bits)!
Display Color: Yello 1ere page et Blue 3 pages

Pin Description:
1 VCC: Power > =4.0V minimum !
2 GND: Power Ground
3 SCL: Clock Line
4 SDA: Data Line




Hardware :
Base 18F26K22 --- liaison I2C1 SDA SCL
Base 18F26K22 -- liaison UART1 ---TX,RX ---prolific cable _USB-- YAT terminal PC
Alimentation via un bloc secteur 9V DC -- Regulateur DC/DC LM2906--ajustable 3.3V à 5V

Le controleur LCD est basé sur un SSD1306 .
Librairie : Driver_Oled_I2C1_Hw_18Fxxk22_2021_03.mcl
Header : Driver_oled_I2C1_HW_18FxxK22_2021_03.h

Le point clé est l'INITIALISATION correcte du LCD

void OLED_Init(void) // voir 18F47J53 { WriteCmd(0xAE); //display off Delay_ms(200); WriteCmd(0xAF); //display on Delay_ms(100); WriteCmd(0xB0);// Set GDDRAM Page start adresse [2:0] 0 à 7 WriteCmd(0x00); // mini 0 WriteCmd(0x07); // maxi 7 WriteCmd(0x20); //Set Horizontal Memory Addressing Mode //A[1:0] = 00b, Horizontal Addressing Mode //A[1:0] = 01b, Vertical Addressing Mode //A[1:0] = 10b, Page Addressing Mode (RESET) //A[1:0] = 11b, Invalid WriteCmd(0x00); // Page Addressing Mode (RESET)=02 WriteCmd(0x21); // Setup column start and end address WriteCmd(0); //A[6:0] : Column start address, range : 0-127d,(RESET=0d) WriteCmd(0x7F); // B[6:0]: Column end address, range : 0-127d,(RESET =127d) WriteCmd(0x22);// Setup page start and end address // A[2:0] : Page start Address, range : 0-7d, // (RESET = 0d) // B[2:0] : Page end Address, range : 0-7d, // (RESET = 7d) WriteCmd(0x00); WriteCmd(NBPAGES-1); // 8 -1 // WriteCmd(0xA0); //--set segment re-map colum 0 to SEG 0 de droite -> gauche WriteCmd(0xA1); //--set segment re-map to 127 de gauche -> droite WriteCmd(0xA4);//command enable display outputs according to the GDDRAM contents. // WriteCmd(0xA5);//command forces the entire display to be “ON”, regardless of the contents of the display data RAM. WriteCmd(0xA6);//normal display // WriteCmd(0xA7);//reverse display WriteCmd(0xC8); //Set COM Output Scan Direction //C0h, X[3]=0b: normal mode (RESET) Scan from COM0 to COM[N –1] //C8h, X[3]=1b: remapped mode. Scan from COM[N-1] to COM0 WriteCmd(0xD3); //--set display Offset WriteCmd(0x00); WriteCmd(0x40); //--set start line address 40h | xx avec xx=0 WriteCmd(0xD5); //--set display clock divide ratio/oscillator frequency WriteCmd(0x80); //--set divide ratio 80h WriteCmd(0xA8); //--set multiplex ratio to 63 WriteCmd(0x3F); // was 3F WriteCmd(0xD6); //-- This command is to set the vcommon signals padconfiguration. WriteCmd(0x80); // --set divide ratio 80h WriteCmd(0xD9); //--set display clock divide ratio/oscillator frequency // A[3:0] : Phase 1 period of up to 15 DCLK clocks 0 is invalid entry(RESET=2h) // A[7:4] : Phase 2 period of up to 15 DCLKclocks 0 is invalid entry(RESET=2h ) WriteCmd(0x22); // 22h --reset values 22h //0xDA, (C.OLED_HEIGHT==64)?0x12:0x02, WriteCmd(0xDA); //--set com pins hardware configuration WriteCmd(0x00); // was 0x00 // WriteCmd(0x12); // 0x12h mode 64 ,mais interlignage ! // A[4]=0b, Sequential COM pin configuration // A[4]=1b(RESET), Alternative COM pin configuration // A[5]=0b(RESET), Disable COM Left/Right remap // A[5]=1b, Enable COM Left/Right remap // WriteCmd(0xE0); // Read-Modify-Write start WriteCmd(0xEE); // Read-Modify-Write end. WriteCmd(0x81); //--set contrast control register WriteCmd(0x7F); // 0x00~0xff WriteCmd(0x2E); // no scrolling WriteCmd(0xDB); //--set VComH deselect level // WriteCmd(0x35); //--POR =35h WriteCmd(0x40); // 20H => 0.77x Vcc (Reset value) WriteCmd(0x8D); //--set DC-DC enable Charge Pump Setting WriteCmd(0x14); // 0x14 Enable Charge Pump WriteCmd(0xAF); //--turn on oled panel }

Au demarrage du programme ... option recherche de l'adresse du device (LCD OLED)
ici adresse I2C device trouvé = 120 soit 0x78


Programme:

Enfin trouvé le bug sur le tracé de rectangle avec angles ronds

Driver_Oled_I2C1_Hw_18Fxxk22_2021_03.c

// Draw a rounded rectangle
void SSD1306_DrawRoundRect(Byte x, Byte y, Byte w, Byte h, Byte r)
{
// parties droites
SSD1306_DrawFastHLine(x + r, y, w - 2 * r); // Top
// bug ci-dessous 11-03-2021
// SSD1306_DrawFastHLine(x + r, y + h - 1, w - 2 * r); // Bottom
SSD1306_DrawFastHLine(x + r, y + h - 2, w - 2 * r); // Bottom
SSD1306_DrawFastVLine(x, y + r, h - 2 * r); // Left
SSD1306_DrawFastVLine(x + w - 1, y + r, h - 2 * r); // Right
// les 4 angles
SSD1306_DrawCircleHelper(x + r, y + r, r, 1);
SSD1306_DrawCircleHelper(x + w - r - 1, y + r, r, 2);
SSD1306_DrawCircleHelper(x + w - r - 1, y + h - r - 1, r, 4);
SSD1306_DrawCircleHelper(x + r, y + h - r - 1, r, 8);
}

Presentation :




Projet MikroC 7.60 :
version 11 mars 2021


Projet complet :
18F26K22_Test_OLED_SSD1306_I2C1_0.96p_Jaune_Bleu_2021_0312.zip
executable : Base_18F26K22_Test_OLED_I2C1_HW_128x64_2021_0312.hex
main source : Base_18F26K22_Test_OLED_I2C_128x64_2021_0312.c
Librairies : Driver_Oled_I2C1_Hw_18Fxxk22_2021_03.mcl
Headers : Driver_oled_I2C1_HW_18FxxK22_2021_03.h
*BMP datas dans le zip

voir aussi :
http://paulfjujo.free.fr/_18F47J53_Click/Clicker_18F47J53.htm#OLED_I2C
Test_OLED_1_3p_SSD1106_Bleu_128x64_18F26K22.htm







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