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111 lines
3.2 KiB
C++
111 lines
3.2 KiB
C++
#include "configuration.h"
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#ifdef HAS_EINK2
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#include "EInkDisplay.h"
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#include "SPILock.h"
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#include <SPI.h>
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#define COLORED 0
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#define UNCOLORED 1
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#define INK COLORED // Black ink
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#define PAPER UNCOLORED // 'paper' background colour
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#define EPD_WIDTH 200 // FIXME
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#define EPD_HEIGHT 200
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EInkDisplay::EInkDisplay(uint8_t address, int sda, int scl)
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{
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setGeometry(GEOMETRY_RAWMODE, EPD_WIDTH, EPD_HEIGHT);
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// setGeometry(GEOMETRY_RAWMODE, 128, 64); // old resolution
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// setGeometry(GEOMETRY_128_64); // We originally used this because I wasn't sure if rawmode worked - it does
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}
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// FIXME quick hack to limit drawing to a very slow rate
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uint32_t lastDrawMsec;
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/**
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* Force a display update if we haven't drawn within the specified msecLimit
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*/
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bool EInkDisplay::forceDisplay(uint32_t msecLimit)
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{
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// No need to grab this lock because we are on our own SPI bus
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// concurrency::LockGuard g(spiLock);
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uint32_t now = millis();
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uint32_t sinceLast = now - lastDrawMsec;
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if (sinceLast > msecLimit || lastDrawMsec == 0) {
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lastDrawMsec = now;
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// FIXME - only draw bits have changed (use backbuf similar to the other displays)
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// tft.drawBitmap(0, 0, buffer, 128, 64, TFT_YELLOW, TFT_BLACK);
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for (uint8_t y = 0; y < displayHeight; y++) {
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for (uint8_t x = 0; x < displayWidth; x++) {
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// get src pixel in the page based ordering the OLED lib uses FIXME, super inefficent
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auto b = buffer[x + (y / 8) * displayWidth];
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auto isset = b & (1 << (y & 7));
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// frame.drawPixel(x, y, isset ? INK : PAPER);
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}
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}
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DEBUG_MSG("Updating eink... ");
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// ePaper.Reset(); // wake the screen from sleep
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// updateDisplay(); // Send image to display and refresh
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// Put screen to sleep to save power
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// ePaper.Sleep();
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DEBUG_MSG("done\n");
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return true;
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} else {
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// DEBUG_MSG("Skipping eink display\n");
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return false;
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}
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}
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// Write the buffer to the display memory
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void EInkDisplay::display(void)
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{
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// We don't allow regular 'dumb' display() calls to draw on eink until we've shown
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// at least one forceDisplay() keyframe. This prevents flashing when we should the critical
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// bootscreen (that we want to look nice)
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if (lastDrawMsec)
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forceDisplay(slowUpdateMsec); // Show the first screen a few seconds after boot, then slower
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}
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// Send a command to the display (low level function)
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void EInkDisplay::sendCommand(uint8_t com)
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{
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(void)com;
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// Drop all commands to device (we just update the buffer)
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}
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// Connect to the display
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bool EInkDisplay::connect()
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{
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DEBUG_MSG("Doing EInk init\n");
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#ifdef PIN_EINK_PWR_ON
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digitalWrite(PIN_EINK_PWR_ON, HIGH); // If we need to assert a pin to power external peripherals
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pinMode(PIN_EINK_PWR_ON, OUTPUT);
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#endif
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#ifdef PIN_EINK_EN
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// backlight power, HIGH is backlight on, LOW is off
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digitalWrite(PIN_EINK_EN, LOW);
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pinMode(PIN_EINK_EN, OUTPUT);
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#endif
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// Initialise the ePaper library
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// FIXME - figure out how to use lut_partial_update
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if (false) {
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DEBUG_MSG("ePaper init failed\n");
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return false;
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} else {
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return true;
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}
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}
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#endif
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