0.0.16 release of ch55xduino Latest

fix GSINIT in sdcc.sh so volatile variables will not affect even alignment.
add 266 bytes USB ram option and USBtinySPI_CH552 (Adafruit USBtinySPI implementation on CH552 with debugWIRE feature) example.

0.0.15 release of ch55xduino

fix ch559 erase bug for binary larger than 8192 bytes.

0.0.14 release of ch55xduino

Add Serial.h to compile on Windows

0.0.13 release of ch55xduino

Add 12M clk option

fix sed in Arduino 2.0 on Mac

update upload tool for Arduino 2.0 #76

no update sdcc, the current version has -x bug.

0.0.12 release of ch55xduino 

Latest

Update build script for even alignment
Update build script to use -x c and include option for cpp

0.0.11 release of ch55xduino 

Latest

Update SDCC compiler and support generic selection for print function.

0.0.10 release of ch55xduino

Added Serial 1 support
Added 2.5.0 bootloader support. Also support CH375 driver in Windows
Added HID keyboard/mouse and keyboard/media combo example
Suppressed sdcc script print in stderr
Updated delayMicroseconds, increase accuracy
Added Timer2Interrupt and GPIOInterrupt handler in main

0.0.9 release of ch55xduino

Add support for CH559
By default the CH559 will use the pulled-down pin P46 instead of pulled-up D+ to enter the bootloader.

Add basic support for CH549.
CH549 can not jump to bootloader in usercode.

0.0.8 release of ch55xduino

Add Mass Storage support

Bug fix in UsbSerialAdaptor and CMSIS_DAP example

0.0.7 release of ch55xduino

Add soft I2C support.
Add WS2812 (Neopixel) support.

Add 16M clock option for 3.3V board.
Add support for 2.4.0 version bootloader.
Add EEPROM (DataFlash) support.

More optimization. And a CMSIS-DAP example included.

A ch552 acts as debugger for an Arduino-Zero compatible board.

Now you can make any USB device. There are examples of CDC and HID keyboard device.

Also it is possible to upload code with UART1.

Support most Arduino functions. (Except pulse, shift, tone)
Add SPI library
Add touchkey library

Photo of a breakout board. Fully tested.