twiddling things trying to get drums working on CH

Makefile

@@ -15,6 +15,11 @@ firmwares: build/MockBand.drums.hex
 build/MockBand.drums.hex: VID=0x1bad
 build/MockBand.drums.hex: PID=0x3110
 
+firmwares: build/MockBand.drums1.hex
+build/MockBand.drums1.hex: VID=0x1bad
+build/MockBand.drums1.hex: PID=00005
+
+
 build/MockBand.%.hex: MockBand.ino
 	mkdir -p build/cache
 	rm -f build/build.options.json

MockBand.ino

@@ -142,8 +142,8 @@ void loop() {
     }
 #else // DRUMS
     buttonState.buttons |= (buttons >> 10) & 0b01011;   // Cymbals
-    bitWrite(buttonState.buttons, 10, buttons & (0b01111 <<  0));  // Drum pad modifier
-    bitWrite(buttonState.buttons, 11, buttons & (0b01011 << 10));  // Cymbals modifier
+    bitWrite(buttonState.buttons, 10, (buttons >>  0) & 0b01111);  // Drum pad modifier
+    bitWrite(buttonState.buttons, 11, (buttons >> 10) & 0b01011);  // Cymbals modifier
     buttonState.axis[3] = bitRead(buttons, 12)?255:0;   // High hat
 
     // rbdrum2midi wants these set
@@ -151,6 +151,9 @@ void loop() {
     buttonState.velocity[1] = bitRead(buttonState.buttons, 2)?127:0; // R 
     buttonState.velocity[2] = bitRead(buttonState.buttons, 1)?127:0; // G
     buttonState.velocity[3] = bitRead(buttonState.buttons, 0)?127:0; // B
+
+    // Say the D-pad is centered
+    buttonState.hatAndConstant = 8;
 #endif
 
 #ifdef DPAD

docs/tech-notes.md

@@ -70,13 +70,19 @@ Here's what each bit means:
 hatAndConstant
 --------------
 
-Here's what the values mean:
+The HAT switch reports its position like a clock.
 
-* 2: right
-* 6: left
-* 0: up
-* 4: down
-* 8: nothing
+    7   0   1
+
+    6   8   2
+
+    5   4   3
+
+0 is up,
+2 is right,
+4 is down,
+6 is left,
+and 8 is centered.
 
 
 velocity