Transparent Graphical OLED lineClear() and Buffering

Components & Accessories Displays
1

I have a [Transparent Graphical OLED connected to an Adafruit [ Feather M0 Basic Proto. I have it wired up via SPI and all of the examples run correctly, but I have two problems.

  1. The lineClear() method doesn’t seem to work. All of the other “clear” methods work, just not the one for lines.

  2. Buffering. I’m attempting to follow the example in [Everything You Should Know About HyperDisplay. In following the tutorial, I’ve created a smaller window and set aside the memory for it. I can draw a line on that window and it appears where I would expect it to. My problem is when I surround my drawing calls with the buffer() and show() methods, the screen remains blank.

Here is my code:

#include "HyperDisplay_UG2856KLBAG01.h"

#define SPI_PORT SPI        // Used if USE_SPI == 1

#define RES_PIN 2
#define CS_PIN 19
#define DC_PIN 18

UG2856KLBAG01_SPI myTOLED;  // Declare a SPI-based Transparent OLED object called myTOLED

uint8_t color = 0x01;
uint8_t noColor = 0x00;

int windowWidth = 64;
int windowHeight = 64;

uint8_t horizonWindowMem[64*64];    // Reserve 64*64 pixels worth of memory

wind_info_t horizonWindow;

int yLeft = 25;
int yRight = 40;

void setup() {
  SPI_PORT.begin();
  myTOLED.begin(CS_PIN, DC_PIN, SPI_PORT);                  // Begin for SPI requires that you provide the CS and DC pin numbers

  myTOLED.setWindowDefaults(&horizonWindow);
  horizonWindow.xMin = 32;
  horizonWindow.yMin = 0;
  horizonWindow.xMax = 96;
  horizonWindow.yMax = 64;
  
  myTOLED.setWindowMemory(&horizonWindow, (color_t)horizonWindowMem, windowWidth*windowHeight);    // Make sure that the window knows about the memory
  myTOLED.pCurrentWindow = &horizonWindow;

  myTOLED.buffer();
  myTOLED.windowClear();
  myTOLED.lineSet(0, yLeft, windowWidth, yRight);
  myTOLED.show();
}

](https://learn.sparkfun.com/tutorials/everything-you-should-know-about-hyperdisplay/buffering)](Adafruit Feather M0 Basic Proto - ATSAMD21 Cortex M0 : ID 2772 : Adafruit Industries, Unique & fun DIY electronics and kits)](https://www.sparkfun.com/products/15173)

2

Hi there!

I have been checking the code you provide but im not finding where do you have written the lineClear() method.

Dunno whatelse may be. Sorry