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Fix the garbage appearing on last line of OLED #10975

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Fix the garbage appearing on last line of OLED #10975

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9ed4aa2
Fix the garbage appearing on last line of OLED
tonuonu Jul 19, 2025
275c3ba
Fix OLED addressing mode and restore display start line command
tonuonu Jul 20, 2025
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30 changes: 20 additions & 10 deletions src/main/drivers/display_ug2864hsweg01.c
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Original file line number Diff line number Diff line change
Expand Up @@ -199,17 +199,27 @@ void i2c_OLED_clear_display(void)
i2c_OLED_send_cmd(0xa6); // Set Normal Display
i2c_OLED_send_cmd(0xae); // Display OFF
i2c_OLED_send_cmd(0x20); // Set Memory Addressing Mode
i2c_OLED_send_cmd(0x00); // Set Memory Addressing Mode to Horizontal addressing mode
i2c_OLED_send_cmd(0xb0); // set page address to 0
i2c_OLED_send_cmd(0x40); // Display start line register to 0
i2c_OLED_send_cmd(0); // Set low col address to 0
i2c_OLED_send_cmd(0x10); // Set high col address to 0
for (uint16_t i = 0; i < 1024; i++) { // fill the display's RAM with graphic... 128*64 pixel picture
i2c_OLED_send_byte(0x00); // clear
i2c_OLED_send_cmd(0x02); // Set Memory Addressing Mode to Page addressing mode
i2c_OLED_send_cmd(0x40); // Set Display Start Line to 0

// Clear all 8 pages (0-7)
for (uint8_t page = 0; page < 8; page++) {
i2c_OLED_send_cmd(0xb0 + page); // set page address
i2c_OLED_send_cmd(0x00); // set low col address to 0
i2c_OLED_send_cmd(0x10); // set high col address to 0

for (uint8_t col = 0; col < 128; col++) {
i2c_OLED_send_byte(0x00); // clear
}
}
i2c_OLED_send_cmd(0x81); // Setup CONTRAST CONTROL, following byte is the contrast Value... always a 2 byte instruction
i2c_OLED_send_cmd(200); // Here you can set the brightness 1 = dull, 255 is very bright
i2c_OLED_send_cmd(0xaf); // display on

i2c_OLED_send_cmd(0xb0); // Reset to page 0
i2c_OLED_send_cmd(0x00); // Reset low col address to 0
i2c_OLED_send_cmd(0x10); // Reset high col address to 0

i2c_OLED_send_cmd(0x81); // Setup CONTRAST CONTROL
i2c_OLED_send_cmd(200); // Contrast value
i2c_OLED_send_cmd(0xaf); // Display ON
}

void i2c_OLED_clear_display_quick(void)
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