stick at arduino-cli 0.9.0 see arduino/arduino-cli#821

Author: ArminJo

Diff for: .github/workflows/TestCompile.yml

@@ -40,6 +40,7 @@ jobs:
 #          - digistump:avr:digispark-tiny   # ATtiny85 board @16.5 MHz
           - digistump:avr:digispark-tiny16 # ATtiny85 board @16 MHz
           - digistump:avr:digispark-pro
+          - digistump:avr:MHETtiny88 # Chinese MH-Tiny ATTiny88
 
         # Specify parameters for each board.
         # With examples-exclude you may exclude specific examples for a board. Use a comma separated list.
@@ -76,6 +77,7 @@ jobs:
       - name: Compile all examples
         uses: ArminJo/arduino-test-compile@master
         with:
+          cli-version: 0.9.0 # see https://github.com/arduino/arduino-cli/issues/821
           required-libraries: ${{ env.REQUIRED_LIBRARIES }}
           arduino-board-fqbn: ${{ matrix.arduino-boards-fqbn }}
           platform-default-url: ${{ env.PLATFORM_DEFAULT_URL }}

Diff for: README.md

@@ -40,6 +40,44 @@ You may also test the [t85_agressive bootloader](firmware/configuration#overview
 It works for my boards but the USB timing is not guaranteed as stable as in the other configurations.
 Do not forget to change the `upload.maximum_size` entry in *%localappdata%\Arduino15\packages\digistump\hardware\avr\1.6.8\boards.txt* to **6778**.<br/>
 
+# Pin layout
+### ATtiny85 on Digispark
+
+```
+                       +-\/-+
+ RESET/ADC0 (D5) PB5  1|    |8  VCC
+  USB- ADC3 (D3) PB3  2|    |7  PB2 (D2) INT0/ADC1 - default TX Debug output for ATtinySerialOut
+  USB+ ADC2 (D4) PB4  3|    |6  PB1 (D1) MISO/DO/AIN1/OC0B/OC1A/PCINT1 - (Digispark) LED
+                 GND  4|    |5  PB0 (D0) OC0A/AIN0
+                       +----+
+  USB+ and USB- are each connected to a 3.3 volt Zener to GND and with a 68 Ohm series resistor to the ATtiny pin.
+  On boards with a micro USB connector, the series resistor is 22 Ohm instead of 68 Ohm. 
+  USB- has a 1k pullup resistor to indicate a low-speed device (standard says 1k5).                  
+  USB+ and USB- are each terminated on the host side with 15k to 25k pull-down resistors.
+```
+
+### ATtiny167 on Digispark pro
+Digital Pin numbers in braces are for ATTinyCore library
+
+```
+                  +-\/-+
+RX   6 (D0) PA0  1|    |20  PB0 (D8)  0 OC1AU
+TX   7 (D1) PA1  2|    |19  PB1 (D9)  1 OC1BU - (Digispark) LED
+     8 (D2) PA2  3|    |18  PB2 (D10) 2 OC1AV
+INT1 9 (D3) PA3  4|    |17  PB3 (D11) 4 OC1BV USB-
+           AVCC  5|    |16  GND
+           AGND  6|    |15  VCC
+    10 (D4) PA4  7|    |14  PB4 (D12)   XTAL1
+    11 (D5) PA5  8|    |13  PB5 (D13)   XTAL2
+    12 (D6) PA6  9|    |12  PB6 (D14) 3 INT0  USB+
+     5 (D7) PA7 10|    |11  PB7 (D15)   RESET
+                  +----+
+  USB+ and USB- are each connected to a 3.3 volt Zener to GND and with a 51 Ohm series resistor to the ATtiny pin.
+  USB- has a 1k5 pullup resistor to indicate a low-speed device.
+  USB+ and USB- are each terminated on the host side with 15k to 25k pull-down resistors.
+
+```
+
 ## Oak board
 The Arduino ESP8266 core available with https://arduino.esp8266.com/stable/package_esp8266com_index.json supports the *Digistump Oak* board now, better use that.
 

Diff for: digistump-avr/libraries/DigisparkKeyboard/DigiKeyboard.h

@@ -98,11 +98,30 @@ class DigiKeyboardDevice: public Print {
         sendKeyStroke(keyStroke, 0);
     }
 
+    void enableLEDFeedback() {
+        sUseFeedbackLed = true;
+    }
+
+    void disableLEDFeedback() {
+        sUseFeedbackLed = false;
+    }
+
     //sendKeyStroke: sends a key press AND release with modifiers
     void sendKeyStroke(byte keyStroke, byte modifiers) {
+        sendKeyStroke(keyStroke, modifiers,false);
+    }
+
+    //sendKeyStroke: sends a key press AND release with modifiers
+    void sendKeyStroke(byte keyStroke, byte modifiers, bool aUseFeedbackLed) {
+        if(aUseFeedbackLed) {
+            digitalWrite(LED_BUILTIN, HIGH);
+        }
         sendKeyPress(keyStroke, modifiers);
         // This stops endlessly repeating keystrokes:
         sendKeyPress(0, 0);
+        if(aUseFeedbackLed) {
+            digitalWrite(LED_BUILTIN, LOW);
+        }
     }
 
     //sendKeyPress: sends a key press only - no release
@@ -173,12 +192,12 @@ class DigiKeyboardDevice: public Print {
             data = pgm_read_byte_near(keycodes_ascii + (chr - 0x20));
         }
         if (data) {
-            sendKeyStroke(keycode_to_key(data), keycode_to_modifier(data));
+            sendKeyStroke(keycode_to_key(data), keycode_to_modifier(data),sUseFeedbackLed);
         }
         return 1;
     }
 
-    //private: TODO: Make friend?
+    bool sUseFeedbackLed = false;
     uchar reportBuffer[2];    // buffer for HID reports [ 1 modifier byte + (len-1) key strokes]
     using Print::write;
 };