An Arduino library, that allows you access the GPIO pins of the Max 3421 IC present in the USB Host Shield.
This library allows both read and write operations on the GPIO pins of the Max 3421 IC. Each pin can be read or written separately like the digitalWrite or digitalRead.
Also note that only digital write and read are supported, since the IC don't support PWM.
Download or checkout from github the library and place the USB_Host_Shield_GPIO folder inside your Arduino's /library folder.
This library requires the USB Host Shield library, without which this can't work.
Stack the USB Host shield on top of Arduino. After that connect the GIn or GOut pins of the shield to your circuit as needed.
To use the library, you have to include the USB_Host_Shield_GPIO.h header file. After including the header file, create an instance of the MaxGPIO class. You can call the write() or read() method on that object that you have created. These functions are similar to the digitalWrite() and digitalRead() functions which is present in the core.
I have included an example sketch inside the examples folder that explains how you can access the library.
Also checkout my blog post, which explains how to use this library.
I have also uploaded a video, which shows how you can use this library to access the GPIO pins. In the video, I have added 8 LED’s to the 8 GOut pins and I control each of them separately.
The library and the examples are released under released under BeerWare license.
I would, however, consider it a great courtesy if you could email me and tell me about your project and how this code was used, just for my own continued personal gratification.
Updates about this library will be posted in the Hardware Fun blog. You can also follow @hardwarefun in twitter.
The current version of the library is 1.0.0. You can find the full history in the HISTORY.md file
This library adheres to Semantic Versioning 2.0.