Skip to content

Commit

Permalink
Update readme.md
Browse files Browse the repository at this point in the history
  • Loading branch information
philipstarkey authored May 29, 2021
1 parent 2229e67 commit ada60b0
Showing 1 changed file with 1 addition and 3 deletions.
4 changes: 1 addition & 3 deletions readme.md
Original file line number Diff line number Diff line change
Expand Up @@ -2,8 +2,6 @@

The PrawnBlaster firmware turns the $5 Raspberry Pi Pico microcontroller board into a [_labscript suite_](https://github.com/labscript-suite) pseudoclock device.

**Current Development Status**: Beta. The firmware has not been well tested. There may be timing errors, errors that appear when running for long periods of time, and/or missing or undocumented features. **There is currently no labscript device class.**

## What is a pseudoclock device?
A pseudoclock is a device that can be programmed to output a variable frequency clock.
The entire sequence of clock pulses is programmed into internal memory (over serial) and then executed on command (in order to achieve precise timing).
Expand Down Expand Up @@ -169,4 +167,4 @@ In general it should work as long as it has 9 GPIO pins available for use (and n
Without pin 20 or 22, you can't externally reference the board.
And with less GPIO pins you can't have 4 independent pseudoclocks each with an independent trigger.
If you only need 1 trigger, you can get away with 1 pin for a trigger, 1 pin for each pseudoclock output you want (somewhere between 1 and 4) and 1 pin (either GPIO 20 or 22) for externally referencing if you need it.
But unless you have a strong reason to get another RP2040 based board, we suggest sticking with the standard Pico (Which is usually the cheaper option anyway).
But unless you have a strong reason to get another RP2040 based board, we suggest sticking with the standard Pico (Which is usually the cheaper option anyway).

0 comments on commit ada60b0

Please sign in to comment.