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nodo-domotica.nl • Toon onderwerp - PCF8574 IO Expander PLUGIN 025 - Afdrukweergave
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PCF8574 IO Expander PLUGIN 025
http://www.nodo-domotica.nl/forum/viewtopic.php?f=9&t=1698		 Pagina 1 van 1
Auteur:  wvh [ 29 sep 2013, 11:53 ]
Titel:  PCF8574 IO Expander PLUGIN 025
PCF8574 IO Expander

Plugin 025


* Voor de eenvoud nummeren we de poorten gewoon door indien je meerdere chips aansluit:
* dus poort 1 is poort 1 van de eerste chip op adres 0x20
* poort 9 is poort 1 van de tweede chip op adres 0x21
* poort 17 is poort 1 van de derde chip op adres 0x22
* etc.

Nu..... op de k8000 van velleman staan ook 2 pcf8574AP waarvan AO vast aan de 5v.
de andere A1 en A2 kan ik via schakelaar instellen .

Ik heb alle instellingen via de 2 schakelaars al eens ingesteld maar zonder resultaat .
ik krijg altijd een PUGIN Error terug van de nodo .

Toch bij het commando "Status PLUGIN"

Input=HTTP(141.138.156.245); Unit=1; Event=Status Plugin,0
Plugin 1
Plugin 2
Plugin 3
Plugin 4
Plugin 5
Plugin 7
Plugin 12
Plugin 13
Plugin 25
Plugin 27

is het normaal dat ik Ook een PLUGIN Error krijg bij niet aangesloten PCF8574AP ?
of zit de fout bij A0 die vast aan de 5v zit ?
Wie kan me hier bij helpen ?

Victor
Auteur:  mvdbro [ 29 sep 2013, 13:38 ]
Titel:  Re: PCF8574 IO Expander PLUGIN 025
De PCF8574A is een andere chip dan de PCF8574. Ze werken weliswaar hetzelfde maar het I2C adresbereik is gewijzigd. Daardoor kun je deze chips inzetten als je al 8 gewone chips in gebruik hebt.

Adresbereik PCF8574 0x20-0x27
Adresbereik PCF8574A 0x38-0x3F

De plugin ondersteunt op dit moment alleen de gewone versie. Het vereist een code aanpassing om beide versies te ondersteunen.

Daarnaast moet je inderdaad goed kijken hoe de pinnen A0,A1 en A2 zijn ingesteld. Deze waarde moet je bij het basis adres optellen. (waarde loopt van 0-7)

gr
Martinus
Auteur:  wvh [ 29 sep 2013, 14:27 ]
Titel:  Re: PCF8574 IO Expander PLUGIN 025
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