eink display now kinda works

src/graphics/TFTDisplay.cpp

@@ -0,0 +1,61 @@
+#include "configuration.h"
+
+#ifdef ST7735_CS
+#include "SPILock.h"
+#include "TFTDisplay.h"
+#include "graphics/configs.h"
+#include <SPI.h>
+#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
+
+static TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h
+
+TFTDisplay::TFTDisplay(uint8_t address, int sda, int scl)
+{
+    setGeometry(GEOMETRY_128_64); // FIXME - currently we lie and claim 128x64 because I'm not yet sure other resolutions will
+                                  // work ie GEOMETRY_RAWMODE
+}
+
+// Write the buffer to the display memory
+void TFTDisplay::display(void)
+{
+    concurrency::LockGuard g(spiLock);
+
+    // 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 < SCREEN_HEIGHT; y++) {
+        for (uint8_t x = 0; x < SCREEN_WIDTH; x++) {
+
+            // get src pixel in the page based ordering the OLED lib uses FIXME, super inefficent
+            auto b = buffer[x + (y / 8) * SCREEN_WIDTH];
+            auto isset = b & (1 << (y & 7));
+            tft.drawPixel(x, y, isset ? TFT_WHITE : TFT_BLACK);
+        }
+    }
+}
+
+// Send a command to the display (low level function)
+void TFTDisplay::sendCommand(uint8_t com)
+{
+    (void)com;
+    // Drop all commands to device (we just update the buffer)
+}
+
+// Connect to the display
+bool TFTDisplay::connect()
+{
+    DEBUG_MSG("Doing TFT init\n");
+
+#ifdef ST7735_BACKLIGHT_EN
+    digitalWrite(ST7735_BACKLIGHT_EN, HIGH);
+    pinMode(ST7735_BACKLIGHT_EN, OUTPUT);
+#endif
+
+    tft.init();
+    tft.setRotation(3); // Orient horizontal and wide underneath the silkscreen name label
+    tft.fillScreen(TFT_BLACK);
+    // tft.drawRect(0, 0, 40, 10, TFT_PURPLE); // wide rectangle in upper left
+
+    return true;
+}
+
+#endif