techo-display: first bits

Author: fdlamotte

examples/companion_radio/main.cpp

@@ -61,6 +61,8 @@
   #include "UITask.h"
   #ifdef ST7789
     #include <helpers/ui/ST7789Display.h>
+  #elif defined(HAS_GxEPD)
+    #include <helpers/ui/GxEPDDisplay.h>
   #else
     #include <helpers/ui/SSD1306Display.h>
   #endif

src/helpers/ui/GxEPDDisplay.cpp

@@ -0,0 +1,63 @@
+
+#include "GxEPDDisplay.h"
+
+bool GxEPDDisplay::begin() {
+  display.epd2.selectSPI(SPI1, SPISettings(4000000, MSBFIRST, SPI_MODE0));
+  SPI1.begin();
+  display.init(115200, true, 2, false);
+  display.setRotation(3);
+  display.setFont(&FreeMono9pt7b);
+
+  display.setPartialWindow(0, 0, display.width(), display.height());
+
+  display.fillScreen(GxEPD_WHITE);
+  display.display();
+  _init = true;
+  return true;
+}
+
+void GxEPDDisplay::turnOn() {
+  if (!_init) begin();
+}
+
+void GxEPDDisplay::turnOff() {
+
+}
+
+void GxEPDDisplay::clear() {
+  display.fillScreen(GxEPD_WHITE);
+  display.setTextColor(GxEPD_BLACK);
+}
+
+void GxEPDDisplay::startFrame(Color bkg) {
+  display.fillScreen(GxEPD_WHITE);
+}
+
+void GxEPDDisplay::setTextSize(int sz) {
+}
+
+void GxEPDDisplay::setColor(Color c) {
+  display.setTextColor(GxEPD_BLACK);
+}
+
+void GxEPDDisplay::setCursor(int x, int y) {
+  display.setCursor(x*1.5, (y*1.5)+10);
+}
+
+void GxEPDDisplay::print(const char* str) {
+  display.print(str);
+}
+
+void GxEPDDisplay::fillRect(int x, int y, int w, int h) {
+}
+
+void GxEPDDisplay::drawRect(int x, int y, int w, int h) {
+}
+
+void GxEPDDisplay::drawXbm(int x, int y, const uint8_t* bits, int w, int h) {
+  display.drawBitmap(x*1.5, (y*1.5) + 10, bits, w, h, GxEPD_BLACK);
+}
+
+void GxEPDDisplay::endFrame() {
+  display.display(true);
+}

src/helpers/ui/GxEPDDisplay.h

@@ -0,0 +1,49 @@
+#pragma once
+
+#include <SPI.h>
+#include <Wire.h>
+
+#define ENABLE_GxEPD2_GFX 0
+
+#include <GxEPD2_BW.h>
+#include <GxEPD2_3C.h>
+#include <GxEPD2_4C.h>
+#include <GxEPD2_7C.h>
+#include <Fonts/FreeMono9pt7b.h>
+
+#define GxEPD2_DISPLAY_CLASS GxEPD2_BW
+#define GxEPD2_DRIVER_CLASS GxEPD2_150_BN  // DEPG0150BN 200x200, SSD1681, (FPC8101), TTGO T5 V2.4.1
+
+#include <epd/GxEPD2_150_BN.h>  // 1.54" b/w 
+
+#include "DisplayDriver.h"
+
+//GxEPD2_BW<GxEPD2_150_BN, 200> display(GxEPD2_150_BN(DISP_CS, DISP_DC, DISP_RST, DISP_BUSY)); // DEPG0150BN 200x200, SSD1681, TTGO T5 V2.4.1                 
+
+
+class GxEPDDisplay : public DisplayDriver {
+
+  GxEPD2_BW<GxEPD2_150_BN, 200> display;
+  bool _init = false;
+
+public:
+  GxEPDDisplay() : DisplayDriver(200, 200), display(GxEPD2_150_BN(DISP_CS, DISP_DC, DISP_RST, DISP_BUSY)) { 
+
+  }
+
+  bool begin();
+
+  bool isOn() override { return true; }
+  void turnOn() override;
+  void turnOff() override;
+  void clear() override;
+  void startFrame(Color bkg = DARK) override;
+  void setTextSize(int sz) override;
+  void setColor(Color c) override;
+  void setCursor(int x, int y) override;
+  void print(const char* str) override;
+  void fillRect(int x, int y, int w, int h) override;
+  void drawRect(int x, int y, int w, int h) override;
+  void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override;
+  void endFrame() override;
+};

variants/techo/platformio.ini

@@ -56,17 +56,23 @@ build_flags =
 extends = LilyGo_Techo
 build_flags =
   ${LilyGo_Techo.build_flags}
+  -I src/helpers/ui
   -D MAX_CONTACTS=100
   -D MAX_GROUP_CHANNELS=8
   -D BLE_PIN_CODE=123456
   -D BLE_DEBUG_LOGGING=1
+  -D DISPLAY_CLASS=GxEPDDisplay
+  -D HAS_GxEPD
 ;  -D ENABLE_PRIVATE_KEY_IMPORT=1
 ;  -D ENABLE_PRIVATE_KEY_EXPORT=1
 ;  -D MESH_PACKET_LOGGING=1
 ;  -D MESH_DEBUG=1
 build_src_filter = ${LilyGo_Techo.build_src_filter}
-  +<helpers/nrf52/*.cpp>
-  +<../examples/companion_radio/main.cpp>
+  +<helpers/nrf52/TechoBoard.cpp>
+  +<helpers/nrf52/SerialBLEInterface.cpp>
+  +<helpers/ui/GxEPDDisplay.cpp>
+  +<../examples/companion_radio>
 lib_deps =
   ${LilyGo_Techo.lib_deps}
   densaugeo/base64 @ ~1.4.0
+  zinggjm/GxEPD2 @ 1.6.2

variants/techo/variant.cpp

@@ -2,6 +2,10 @@
 #include "wiring_constants.h"
 #include "wiring_digital.h"
 
+const int MISO = PIN_SPI1_MISO;
+const int MOSI = PIN_SPI1_MOSI;
+const int SCK = PIN_SPI1_SCK;
+
 const uint32_t g_ADigitalPinMap[] = {
   0xff, 0xff, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
   14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,

variants/techo/variant.h

@@ -96,10 +96,18 @@
 #define SX126X_DIO2_AS_RF_SWITCH
 #define SX126X_DIO3_TCXO_VOLTAGE 1.8
 
-#define PIN_SPI1_MISO           (39)
+////////////////////////////////////////////////////////////////////////////////
+// SPI1
+
+#define PIN_SPI1_MISO           (38)
 #define PIN_SPI1_MOSI           (29)
 #define PIN_SPI1_SCK            (31)
 
+// GxEPD2 needs that for a panel that is not even used !
+extern const int MISO;
+extern const int MOSI;
+extern const int SCK;
+
 ////////////////////////////////////////////////////////////////////////////////
 // Display