- Quick specs
- Price: Free
- Operating system: Mac OS X 10.4/10.5/10.4 PPC/Intel/10.5 PPC/Intel
- Date added: September 28, 2009
- Total Downloads: 47
- Downloads last week: 2
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Publisher's description
From Bob Rau Consulting :1 Wire Keyboard Calculator is a tool for embedded system designers to implement a keypad using a single analog to digital converter (A/D) input. For larger keyboards, or keypads that require chording (more than one key pressed at a time) multiple A/D inputs can be used, each with a portion of your complete keypad. Two to 64 key keyboards are supported, however keyboards beyond 26 keys may be hard to realize. 1-Wire keyboards offer lower EMI than scanned keyboards, and need fewer ESD protection components to implement, and require just 1 pin on a microcontroller. The user enters the keypad matrix size, the A/D specifications, the resistor specifications, and the environmental requirements.
What's new in this version:
Improved Resistor selection algorithm. Now generates C code for decoding keypad.
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