CH375-Arduino-master.zip_ASD_advice154_ch375_ch375 arduino_outli

# CH375-Arduino * This is an open source library for the Arduino development environment which simplifies the interaction with the CH375 USB controller chips. * Currently in very early development stage: * The CH375 supports communication with a microcontroller both via UART serial and via an 8-bit parallel bust, but at the moment onle the serial mode is supported. * Only supports USB host mode (CH375 can also work as a USB device but this is not supported yet and not a priority). * The goal is to provide a low-level API for USB requests (control transfers, bulk transfers, etc) as well as high-level APIs for the most common [USB device classes](https://en.wikipedia.org/wiki/USB#Device_classes) (printer, HID, mass storage, etc.). * The low-level API is provided by the CH375 class (see CH375.h and CH375.cpp) * At the moment the only available high-level API is for the [Printer device class](https://cscott.net/usb_dev/data/devclass/usbprn10.pdf) (see CH375USBPrinter.h and CH375USBPrinter.cpp) * Currently the main target microcontroller is the ESP8266; tests are done using the [EspSoftwareSerial](https://github.com/plerup/espsoftwareserial) library by Peter Lerup for ESP8266-CH375 communication. The example compiles for the AVR architecture as well but no testing has been done on AVR boards yet. ## Useful links for development ### General information about USB * [Official docs](http://www.usb.org/developers/docs/usb20_docs/) * [usbmadesimple.co.uk](http://www.usbmadesimple.co.uk/) * [beyondlogic.org](http://www.beyondlogic.org/usbnutshell/usb1.shtml) ### CH375 documentation Unfortunately there isn't a lot of English documentation about this chip. A lot of material that can be found on the manufacturer's website is only available in Chinese (which I don't understand), however I found that Google Translate can produce a quite readable English from it. * [English datasheet](http://www.electrodragon.com/w/images/1/18/CH375DS1.PDF) * [Official webpage](http://www.wch.cn/product/CH375.html) - I used Google Translate to get to the Downloads section at the bottom of the page. There are some zips with C code examples for other microcontrollers (Intel MCS-51). Said source files have function and variable names in English but comments in Chinese. Copying and pasting these comments in Google Translate can give a decent understanding of what the code does.