PC keyboard
From DP
Contents |
Overview
- Bus: PC keyboard interface library.
- Connections: two pins (KBD/KBC) and ground.
- Output type: open drain/open collector.
- Pull-up resistors: NONE, keyboard has internal pull-ups.
- Maximum voltage: 5volts.
- Last documentation update: v5.6.
This library interfaces PC keyboards. A PC keyboard operates at 5volts, and has it’s own internal pull-up resistors to 5volts. The keyboard issues a clock signal that drives all transactions, the library includes a time-out (v0h+) so the Bus Pirate won’t freeze if the keyboard doesn’t respond.
Syntax
| A/a/@ | Toggle auxiliary pin. Capital “A” sets AUX high, small “a” sets to ground. @ sets aux to input (high impedance mode) and reads the pin value. |
| D/d | Measure voltage on the ADC pin (v1+ hardware only). |
| W/w | Capital ‘W’ enables the on-board power supplies. Small ‘w’ disables them. (v1+ hardware only). |
| r | Read one byte with timeout. (r:1…255 for bulk reads) |
| 0b | Write this binary value with timeout. Format is 0b00000000 for a byte, but partial bytes are also fine: 0b1001. |
| 0x | Write this HEX value with timeout. Format is 0×01. Partial bytes are fine: 0xA. A-F can be lower-case or capital letters. |
| 0-255 | Write this decimal value with timeout. Any number not preceded by 0x or 0b is interpreted as a decimal value. |
| , | Value delimiter. Use a coma or space to separate numbers. Any combination is fine, no delimiter is required between non-number values: {0xa6,0, 0 16 5 0b111 0xaF}. |
| & | Delay 1uS. (&:1…255 for multiple delays) |
| (#) | Run macro, (0) for macro list |
| 0 | Macro menu |
| 1 | Live keyboard monitor (v0h+) |