example updates for release

Author: davetcc

examples/arduino32/piPicoTftTouch/piPicoTftTouch.ino

@@ -32,6 +32,20 @@ void setup() {
     // This is added by the code generator, it initialises the menu
     setupMenu();
 
+    // check if the touch screen needs to be initialised, we provide a callback that will be called before and
+    // after the calibration UI is shown, it should reset the screen and touch to native orientation on start, and
+    // put it back to "menu" mode on finishing.
+    touchCalibrator.initCalibration([](bool starting) {
+        static iotouch::TouchOrientationSettings oldSettings = iotouch::TouchOrientationSettings(false, false, false);
+        if(starting) {
+            gfx.setRotation(0);
+            oldSettings = touchScreen.changeOrientation(iotouch::TouchOrientationSettings(false, true, true));
+        } else {
+            gfx.setRotation(1);
+            touchScreen.changeOrientation(oldSettings);
+        }
+    }, true);
+
     // Add a callback to show the build version when the title is pressed
     // this uses the standard function to show a version dialog from tcUtil.h
     setTitlePressedCallback([](int) {

src/extras/DrawableTouchCalibrator.cpp

@@ -136,8 +136,12 @@ uint32_t fltToU32(float val) {
 }
 
 void IoaTouchScreenCalibrator::saveCalibration() {
-    serlogF2(SER_TCMENU_INFO, "Saving IOA touch calibration at ", romPos);
     EepromAbstraction *rom = menuMgr.getEepromAbstraction();
+    if(!rom) {
+        serlogF(SER_ERROR, "Calibration - No ROM defined");
+    }
+
+    serlogF2(SER_TCMENU_INFO, "Saving IOA touch calibration at ", romPos);
     rom->write16(romPos, calibrationMagicIoa);
     rom->write32(romPos + 2, fltToU32(calibrationHandler.getMinX()));
     rom->write32(romPos + 6, fltToU32(calibrationHandler.getMaxX()));
@@ -151,7 +155,7 @@ void IoaTouchScreenCalibrator::saveCalibration() {
 bool IoaTouchScreenCalibrator::loadCalibration() {
     serlogF2(SER_TCMENU_INFO, "Loading IOA touch calibration at ", romPos);
     EepromAbstraction *rom = menuMgr.getEepromAbstraction();
-    if(rom->read16(romPos) != calibrationMagicIoa) {
+    if(!rom || rom->read16(romPos) != calibrationMagicIoa) {
         serlogF(SER_TCMENU_INFO, "Calibrator ROM mismatch");
         return false;
     }