The CM108 and similar USB audio chips which are used in many low cost USB sound interfaces have some user controllable GPIO pins. Although these aren't usually connected it is possible …

2022年4月19日 · The CM108 (which is actually the part number for the USB chip) is a USB audio interface with I/O (inputs and outputs) that can be used for connecting a radio to a Raspberry …

Note that, while some CM108 sound cards permit the PTT signal to be derived from GPIO3 on pin 13 of the CM108, not all CM108 sound cards actually expose this pin. In this case, a simple …

2020年5月9日 · Notes on my CM108 adventures. PTT and COS polarity (Active HI vs. Active LOW) are determined by your particular software and OS. If you cannot change them in …

A simple hacked-together PTT library for CM108 USB soundcards. This is code from the Hamlib, which I simplified and made work standalone. It has a very hackish style and should not be …

cosplay.sh is a command line tool that takes a media file (or pipe) and plays its audio content to a radio transceiver with a CM108 PTT interface. It can be used for automatic ident, allstar …

2013年5月9日 · This project will adapt the CM108 fob to be compatible with a standard Echolink-type interface. My interface was built to use a serial port, DB9 pin 7(RTS) for PTT, pin 8(CTS) …

2024年9月28日 · The GPIO ports of the CM108 are accessed by the OS as a USB HID device. Some ham radio applications (like fldigi, VARA, Dire Wolf etc.) can acces the GPIO (PTT) pin …

2022年6月11日 · Software TNC Direwolf 在最新的版本 ver1.6 / 開發版 ver 1.7 支援以 USB soundcard cm108 芯片的 gpio 作為 ptt。 那就可省回一個寶貴的 USB port 和 USB to serial …

2023年11月15日 · It might be helpful if you could run the 'cm108' utility in a Terminal window and post the results here. which will toggle PTT on and off at 1 second intervals, and then see if …