pull in new epaper lib (which required importing configuration.h everywhere

for dumb reasons)

src/graphics/EInkDisplay2.cpp

@@ -0,0 +1,110 @@
+#include "configuration.h"
+
+#ifdef HAS_EINK2
+#include "EInkDisplay.h"
+#include "SPILock.h"
+#include <SPI.h>
+
+#define COLORED 0
+#define UNCOLORED 1
+
+#define INK COLORED     // Black ink
+#define PAPER UNCOLORED // 'paper' background colour
+
+#define EPD_WIDTH 200 // FIXME
+#define EPD_HEIGHT 200
+
+EInkDisplay::EInkDisplay(uint8_t address, int sda, int scl)
+{
+    setGeometry(GEOMETRY_RAWMODE, EPD_WIDTH, EPD_HEIGHT);
+    // setGeometry(GEOMETRY_RAWMODE, 128, 64); // old resolution
+    // setGeometry(GEOMETRY_128_64); // We originally used this because I wasn't sure if rawmode worked - it does
+}
+
+// FIXME quick hack to limit drawing to a very slow rate
+uint32_t lastDrawMsec;
+
+/**
+ * Force a display update if we haven't drawn within the specified msecLimit
+ */
+bool EInkDisplay::forceDisplay(uint32_t msecLimit)
+{
+    // No need to grab this lock because we are on our own SPI bus
+    // concurrency::LockGuard g(spiLock);
+
+    uint32_t now = millis();
+    uint32_t sinceLast = now - lastDrawMsec;
+
+    if (sinceLast > msecLimit || lastDrawMsec == 0) {
+        lastDrawMsec = now;
+
+        // FIXME - only draw bits have changed (use backbuf similar to the other displays)
+        // tft.drawBitmap(0, 0, buffer, 128, 64, TFT_YELLOW, TFT_BLACK);
+        for (uint8_t y = 0; y < displayHeight; y++) {
+            for (uint8_t x = 0; x < displayWidth; x++) {
+
+                // get src pixel in the page based ordering the OLED lib uses FIXME, super inefficent
+                auto b = buffer[x + (y / 8) * displayWidth];
+                auto isset = b & (1 << (y & 7));
+                // frame.drawPixel(x, y, isset ? INK : PAPER);
+            }
+        }
+
+        DEBUG_MSG("Updating eink... ");
+        // ePaper.Reset(); // wake the screen from sleep
+        // updateDisplay(); // Send image to display and refresh
+        // Put screen to sleep to save power
+        // ePaper.Sleep();
+        DEBUG_MSG("done\n");
+
+        return true;
+    } else {
+        // DEBUG_MSG("Skipping eink display\n");
+        return false;
+    }
+}
+
+// Write the buffer to the display memory
+void EInkDisplay::display(void)
+{
+    // We don't allow regular 'dumb' display() calls to draw on eink until we've shown
+    // at least one forceDisplay() keyframe.  This prevents flashing when we should the critical
+    // bootscreen (that we want to look nice)
+    if (lastDrawMsec)
+        forceDisplay(slowUpdateMsec); // Show the first screen a few seconds after boot, then slower
+}
+
+// Send a command to the display (low level function)
+void EInkDisplay::sendCommand(uint8_t com)
+{
+    (void)com;
+    // Drop all commands to device (we just update the buffer)
+}
+
+// Connect to the display
+bool EInkDisplay::connect()
+{
+    DEBUG_MSG("Doing EInk init\n");
+
+#ifdef PIN_EINK_PWR_ON
+    digitalWrite(PIN_EINK_PWR_ON, HIGH); // If we need to assert a pin to power external peripherals
+    pinMode(PIN_EINK_PWR_ON, OUTPUT);
+#endif
+
+#ifdef PIN_EINK_EN
+    // backlight power, HIGH is backlight on, LOW is off
+    digitalWrite(PIN_EINK_EN, LOW);
+    pinMode(PIN_EINK_EN, OUTPUT);
+#endif
+
+    // Initialise the ePaper library
+    // FIXME - figure out how to use lut_partial_update
+    if (false) {
+        DEBUG_MSG("ePaper init failed\n");
+        return false;
+    } else {
+        return true;
+    }
+}
+
+#endif