fix busy polarity, add 2.9" panel

Author: ladyada

src/Adafruit_ThinkInk.h

@@ -26,6 +26,7 @@ typedef enum {
 #include "panels/ThinkInk_213_Mono_B72.h"
 #include "panels/ThinkInk_213_Mono_B73.h"
 #include "panels/ThinkInk_213_Mono_BN.h"
+#include "panels/ThinkInk_290_Mono_M06.h"
 #include "panels/ThinkInk_420_Mono_BN.h"
 
 #endif // _ADAFRUIT_THINKINK_H_

src/drivers/Adafruit_UC8151D.cpp

@@ -103,7 +103,7 @@ void Adafruit_UC8151D::busy_wait(void) {
   if (_busy_pin >= 0) {
     EPD_command(UC8151D_FLG);
 
-    if (! digitalRead(_busy_pin)) { // wait for busy high
+    if (digitalRead(_busy_pin)) { 
       delay(10);
     }
   } else {

src/panels/ThinkInk_290_Mono_M06.h

@@ -0,0 +1,42 @@
+#ifndef _THINKINK_290_MONO_M06_H
+#define _THINKINK_290_MONO_M06_H
+
+// This file is #included by Adafruit_ThinkInk.h and does not need to
+// #include anything else to pick up the EPD header or ink mode enum.
+
+class ThinkInk_290_Mono_M06 : public Adafruit_UC8151D {
+public:
+  ThinkInk_290_Mono_M06(int8_t SID, int8_t SCLK, int8_t DC, int8_t RST,
+                        int8_t CS, int8_t SRCS, int8_t MISO, int8_t BUSY = -1)
+      : Adafruit_UC8151D(296, 128, SID, SCLK, DC, RST, CS, SRCS, MISO, BUSY){};
+
+  ThinkInk_290_Mono_M06(int8_t DC, int8_t RST, int8_t CS, int8_t SRCS,
+                        int8_t BUSY = -1, SPIClass *spi = &SPI)
+      : Adafruit_UC8151D(296, 128, DC, RST, CS, SRCS, BUSY, spi){};
+
+  void begin(thinkinkmode_t mode = THINKINK_MONO) {
+    Adafruit_EPD::begin(true);
+    setColorBuffer(1, true); // layer 1 uninverted
+    setBlackBuffer(1, true); // only one buffer
+
+    inkmode = mode; // Preserve ink mode for ImageReader or others
+
+    layer_colors[EPD_WHITE] = 0b00;
+    layer_colors[EPD_BLACK] = 0b01;
+    layer_colors[EPD_RED] = 0b01;
+    layer_colors[EPD_GRAY] = 0b01;
+    layer_colors[EPD_LIGHT] = 0b00;
+    layer_colors[EPD_DARK] = 0b01;
+
+    default_refresh_delay = 1000;
+    setRotation(0);
+    powerDown();
+  }
+
+  thinkinkmode_t getMode(void) { return inkmode; }
+
+private:
+  thinkinkmode_t inkmode; // Ink mode passed to begin()
+};
+
+#endif // _THINKINK_290_MONO_M06_H