Create README.md

C64_joystick_atmelstudio/README.md

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+```
+13.2.2019:
+Koko ATmega32U4 tuntuu puuttuvan...
+Löytyy kyllä kun tekee uuden projektin...
+Examplet puuttuu kaikki...
+Tools->Extensions and Updates...->Lufa
+Nyt löytyy.
+Lufa->New Example Project->FourWalledCubicle - Dean Camera->Joystick HID Device Demo (Class Driver APIs) - AVR8 Architecture
+Project->Properties->Change Device...->ATmega32U4 (rutkuttaa jotain, mutta suostuu silti)
+
+Tools->External tools
+Title:
+Arduino_via_bootloader
+command:
+C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude.exe
+Arguments:
+-C"C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -patmega32u4 -cavr109 -PCOM5 -b57600 -D -Uflash:w:"$(BinDir)\$(TargetName).hex":i
+Use Output window
+
+Pari kertaa GND->RST, sitten Tools->Arduino_via_bootloader
+C:\Users\lehti\Documents\Atmel Studio\7.0\CLASS_JOYSTICK1\CLASS_JOYSTICK1\Debug\CLASS_JOYSTICK1.hex
+
+Tulee "LUFA Joystick Demo", 2 nappia ja kolme axista (X,Y,Z).
+Näkyy Device managerissa "HID-compliant game controller".
+0x03EB, 0x2043, Atmel Corp., LUFA Joystick Demo Application.
+
+VID/PID ja "LUFA Joystick Demo": Descriptors.c
+suuntien ja nappien määrä ehkä structissa: Joystick.h
+Ja myös: src/LUFA/Drivers/USB/Class/Common/HIDClassCommon.h (HID_DESCRIPTOR_JOYSTICK)
+Pois: HID_RI_USAGE(8, 0x32)
+Muokkaa: HID_RI_REPORT_COUNT(8, 3) -> 2
+
+Koodi: Joystick.c
+
+GitHub-integraation vois tehdä external tools:lla.
+
+PB6,2,3,1
+PB5,4
+```
+## Joystick.c
+SetupHardware (before USB_INIT();):
+```
+	DDRB = 0x0; //PORTB=input
+	PORTB = 0xff; //PORTB=pullup
+```
+  
+CALLBACK_HID_Device_CreateHIDReport (before report size):
+```
+	if (!(in & (1 << 6))) JoystickReport->Y = -100;
+	if (!(in & (1 << 2))) JoystickReport->Y = 100;
+	if (!(in & (1 << 3))) JoystickReport->X = -100;
+	if (!(in & (1 << 1))) JoystickReport->X = 100;
+	if (!(in & (1 << 5))) JoystickReport->Button |= (1 << 0);
+	if (!(in & (1 << 4))) JoystickReport->Button |= (1 << 1);
+```