implement new auto detect display for sh1106 and ssd1306

src/helpers/ui/AutoDetectDisplay.cpp

@@ -0,0 +1,45 @@
+#include "AutoDetectDisplay.h"
+#include <MeshCore.h>
+
+int AutoDetectDisplay::getDisplayStatus(TwoWire& wire, uint8_t addr) {
+  int status = -1;
+  for(int i = 0; i < 4; i++){
+
+    // request display status
+    wire.beginTransmission(addr);
+    wire.write((uint8_t)0x00);
+
+    // ensure response received
+    if (wire.endTransmission() != 0) return -1; // expect success
+    if (wire.requestFrom((int)addr, 1) == 0) return -1; // expect at least 1 byte
+
+    // ensure two consecutive reads are the same
+    int previous = status;
+    status = wire.read() & 0x0F;
+    if(status == previous){
+      break;
+    }
+
+  }
+  return status;
+}
+
+bool AutoDetectDisplay::begin() {
+
+  // request status from display address
+  int status = getDisplayStatus(Wire, DISPLAY_ADDRESS);
+  MESH_DEBUG_PRINTLN("AutoDetectDisplay: status=0x%02X", status);
+
+  // detect SH1106
+  if(status == 0x00 || status == 0x08){
+    MESH_DEBUG_PRINTLN("AutoDetectDisplay: SH1106 detected");
+    _impl = &_sh1106;
+    return _sh1106.begin();
+  }
+
+  // fallback to SSD1306
+  MESH_DEBUG_PRINTLN("AutoDetectDisplay: falling back to SSD1306");
+  _impl = &_ssd1306;
+  return _ssd1306.begin();
+
+}

src/helpers/ui/AutoDetectDisplay.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "DisplayDriver.h"
+#include "SSD1306Display.h"
+#include "SH1106Display.h"
+
+// Auto detects SH1106 display at runtime, otherwise falls back to using SSD1306
+class AutoDetectDisplay : public DisplayDriver {
+  DisplayDriver* _impl;
+  SSD1306Display _ssd1306;
+  SH1106Display _sh1106;
+
+  int getDisplayStatus(TwoWire& wire, uint8_t addr);
+public:
+  AutoDetectDisplay() : DisplayDriver(128, 64), _impl(&_ssd1306) { }
+  bool begin();
+
+  bool isOn() override { return _impl->isOn(); }
+  void turnOn() override { _impl->turnOn(); }
+  void turnOff() override { _impl->turnOff(); }
+  void clear() override { _impl->clear(); }
+  void startFrame(ColorVal bkg = UIColor::window_bkg) override { _impl->startFrame(bkg); }
+  void setTextSize(int sz) override { _impl->setTextSize(sz); }
+  void setColor(ColorVal c) override { _impl->setColor(c); }
+  void setCursor(int x, int y) override { _impl->setCursor(x, y); }
+  void print(const char* str) override { _impl->print(str); }
+  void fillRect(int x, int y, int w, int h) override { _impl->fillRect(x, y, w, h); }
+  void drawRect(int x, int y, int w, int h) override { _impl->drawRect(x, y, w, h); }
+  void drawXbm(int x, int y, const uint8_t* bits, int w, int h) override { _impl->drawXbm(x, y, bits, w, h); }
+  uint16_t getTextWidth(const char* str) override { return _impl->getTextWidth(str); }
+  void endFrame() override { _impl->endFrame(); }
+};

src/helpers/ui/SH1106Display.cpp

@@ -10,15 +10,15 @@ bool SH1106Display::i2c_probe(TwoWire &wire, uint8_t addr)
 }
 
 // Color scheme
-ColorVal UIColor::window_bkg = SH110X_BLACK;
-ColorVal UIColor::title_bkg = SH110X_BLACK;
-ColorVal UIColor::title_txt = SH110X_WHITE;
-ColorVal UIColor::primary_txt = SH110X_WHITE;
-ColorVal UIColor::secondary_txt = SH110X_WHITE;
-ColorVal UIColor::warning_txt = SH110X_WHITE;
-ColorVal UIColor::popup_bkg = SH110X_BLACK;
-ColorVal UIColor::popup_txt = SH110X_WHITE;
-ColorVal UIColor::corp_blue = SH110X_WHITE;
+__attribute__((weak)) ColorVal UIColor::window_bkg = SH110X_BLACK;
+__attribute__((weak)) ColorVal UIColor::title_bkg = SH110X_BLACK;
+__attribute__((weak)) ColorVal UIColor::title_txt = SH110X_WHITE;
+__attribute__((weak)) ColorVal UIColor::primary_txt = SH110X_WHITE;
+__attribute__((weak)) ColorVal UIColor::secondary_txt = SH110X_WHITE;
+__attribute__((weak)) ColorVal UIColor::warning_txt = SH110X_WHITE;
+__attribute__((weak)) ColorVal UIColor::popup_bkg = SH110X_BLACK;
+__attribute__((weak)) ColorVal UIColor::popup_txt = SH110X_WHITE;
+__attribute__((weak)) ColorVal UIColor::corp_blue = SH110X_WHITE;
 
 bool SH1106Display::begin()
 {

variants/rak4631/platformio.ini

@@ -28,11 +28,14 @@ build_src_filter = ${nrf52_base.build_src_filter}
   +<../variants/rak4631>
   +<helpers/sensors>
   +<helpers/ui/SSD1306Display.cpp>
+  +<helpers/ui/SH1106Display.cpp>
+  +<helpers/ui/AutoDetectDisplay.cpp>
   +<helpers/ui/MomentaryButton.cpp>
 lib_deps =
   ${nrf52_base.lib_deps}
   ${sensor_base.lib_deps}
   adafruit/Adafruit SSD1306 @ ^2.5.13
+  adafruit/Adafruit SH110X @ ^2.1.13
   sparkfun/SparkFun u-blox GNSS Arduino Library@^2.2.27
   boschsensortec/BSEC Software Library @ ^1.8.1492
 
@@ -40,7 +43,7 @@ lib_deps =
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"RAK4631 Repeater"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -56,7 +59,7 @@ build_src_filter = ${rak4631.build_src_filter}
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"RAK4631 Repeater"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -75,7 +78,7 @@ lib_deps =
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"RS232 Bridge"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -98,7 +101,7 @@ build_src_filter = ${rak4631.build_src_filter}
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"RS232 Bridge"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -121,7 +124,7 @@ build_src_filter = ${rak4631.build_src_filter}
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"Test Room"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -137,7 +140,7 @@ build_src_filter = ${rak4631.build_src_filter}
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"RAK4631 Room Server"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0
@@ -161,7 +164,7 @@ build_flags =
   -I examples/companion_radio/ui-new
   -D PIN_USER_BTN=9
   -D PIN_USER_BTN_ANA=31
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
   -D ENABLE_USB_INTERFACE
@@ -186,7 +189,7 @@ build_flags =
   -I examples/companion_radio/ui-new
   -D PIN_USER_BTN=9
   -D PIN_USER_BTN_ANA=31
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
   -D ETHERNET_ENABLED=1
@@ -215,7 +218,7 @@ build_flags =
   -I examples/companion_radio/ui-new
   -D PIN_USER_BTN=9
   -D PIN_USER_BTN_ANA=31
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D MAX_CONTACTS=350
   -D MAX_GROUP_CHANNELS=40
   -D BLE_PIN_CODE=123456
@@ -251,7 +254,7 @@ lib_deps =
 extends = rak4631
 build_flags =
   ${rak4631.build_flags}
-  -D DISPLAY_CLASS=SSD1306Display
+  -D DISPLAY_CLASS=AutoDetectDisplay
   -D ADVERT_NAME='"RAK4631 Sensor"'
   -D ADVERT_LAT=0.0
   -D ADVERT_LON=0.0

variants/rak4631/target.h

@@ -9,7 +9,7 @@
 #include <helpers/sensors/EnvironmentSensorManager.h>
 
 #ifdef DISPLAY_CLASS
-  #include <helpers/ui/SSD1306Display.h>
+  #include <helpers/ui/AutoDetectDisplay.h>
   extern DISPLAY_CLASS display;
   #include <helpers/ui/MomentaryButton.h>
   extern MomentaryButton user_btn;