[En-Nut-Discussion] Harware SPI usage

Ernst Stippl ernst at stippl.org
Mon Nov 12 22:49:21 CET 2007


I used the HW SPI on an Ethernut 2 to connect to an external UART chip and
did not use a critical section while /CS was low. Did not have any problems
(caused by that...)


-----Ursprüngliche Nachricht-----
Von: en-nut-discussion-bounces at egnite.de
[mailto:en-nut-discussion-bounces at egnite.de] Im Auftrag von Petri Hyötylä
Gesendet: Montag, 12. November 2007 10:03
An: en-nut-discussion at egnite.de
Betreff: [En-Nut-Discussion] Harware SPI usage

I'm planning to use the MCU's hardware SPI in a project.
Is there some precautions in using it to avoid collisions with  
Ethernut's internal SPI traffic or is the hardware SPI complete out of  
My guess is that the time that I keep my /CS low has to be a nut  
critical section.


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