OSPI PIN DEFINES explanation

[raymartinshair]

Hi,

I am currently writing a web UI and controller for the Opensprinkler and Raspberry PI to run on mono and have a question about the pin defines in the sample python scripts.

what does the pin_sr_noe = 17 represent? I think I understand the other pins see below for details. Any help would be much appreciated.

# OSPI PIN DEFINES
pin_sr_clk = 4 (shift register clock)
pin_sr_noe = 17 (???????????)
pin_sr_dat = 21 # NOTE: if you have RPi rev.2, change this to 27 (shift register data)
pin_sr_lat = 22 (shift register latch)

Cheers
Adam

[Ray]

NOE is the shift register Output Enable (active low) pin. A logic high disables output, and a logic low enables.

[raymartinshair]

Thanks for the heads up Ray.

Cheers
Adam

[Author]

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