使用 Homebrew 安装 dcled

项目链接

• 主页

命令和别名

• dcled

项目历史

The author wrote the first version after finding a hardware developer manual for the device. The official page says version 1.0 took roughly a Saturday afternoon, and the program was shaped to behave like cat: files go to the display, stdin works as a pipe, and a message option handles one-off text.

The project then accreted features from real desk and server use. Preamble graphics were added because the author missed the beginning of scrolling messages, and later releases moved from libhid to direct libusb use and added a tachometer mode for gauge-like displays.

采用历史

dcled is niche hardware software rather than an ecosystem project. The official page records use for monitoring a game server, Mac OS X compatibility, and a related Ruby userland driver by another developer, which is about the right adoption scale for a single USB novelty device.

使用方式

The practical pattern is Unix plumbing: pipe log output or short status messages into dcled and let the LED board scroll them. The page's example tails a system log through dcled with preamble graphics and echoing enabled so the same text appears on both the terminal and the display.

Options cover brightness, clock display, preambles, repeated scrolling, font selection, speed, test patterns, and a no-device mode, which makes it more scriptable than the toy hardware would suggest.

为什么软件包爱好者会关心

dcled is the kind of package that makes old Unix package indexes fun: one odd USB object, a single-purpose CLI, no daemon, no cloud account, and just enough stream behavior to make it composable.

时间线

• Initial version: Written after the author found the Dream Cheeky hardware developer manual.
• 2011: The page records discussion of a related Inland USB LED badge tool.
• 2012: dcled 2.1 replaced the libhid layer with direct libusb use.
• 2014: dcled 2.2 added tachometer mode and an included cpuload helper.

Related projects

• The official page links to Lewis Clayton's Ruby userland driver for the same Dream Cheeky USB LED Message Board and to an Inland USB LED Badge control project.

来源

• https://www.jeffrika.com/~malakai/dcled/index.html