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Multiple power supply nets

autodeskguest

Hello,

 

my board has several power supply nets. I want to use only one symbol

for Vdd and GND (because has no sense to use 5-6 different symbols) with

explicit lables.

 

Something like this:

 

Vcc_main

GND_main

 

Vcc_analog

GND_analog

 

Vcc_RS485

GND_RS485

 

and so on...

 

I place the power supply symbol on the schematic, connected to the net,

and then I rename that net to its own (see above).

 

Checking with the 'show' command I'm sure the nets don't mix up.

 

Anyway, the ERC screams:

 

WARNING: Sheet 1/5: SUPPLY Pin +5V overwritten with +5V_485

ERROR: Sheet 1/5: SUPPLY Pin +5V overwritten with more than one signal

(+5V, +5V_485)

 

 

Hence I ask you: what's the right way to use different power supply nets

- using only one symbol?

 

Thanks

Marco / iw2nzm

 

Parents

  • Marco Trapanese schrieb:

    Hello,

     

    my board has several power supply nets. I want to use only one symbol

    for Vdd and GND (because has no sense to use 5-6 different symbols) with

    explicit lables.

     

    Something like this:

     

    Vcc_main

    GND_main

     

    Vcc_analog

    GND_analog

     

    Vcc_RS485

    GND_RS485

     

    and so on...

     

    I place the power supply symbol on the schematic, connected to the net,

    and then I rename that net to its own (see above).

     

    Checking with the 'show' command I'm sure the nets don't mix up.

     

    Anyway, the ERC screams:

     

    WARNING: Sheet 1/5: SUPPLY Pin +5V overwritten with +5V_485

    ERROR: Sheet 1/5: SUPPLY Pin +5V overwritten with more than one signal

    (+5V, +5V_485)

     

     

    Hence I ask you: what's the right way to use different power supply nets

    - using only one symbol?

     

     

    You had to define a supply symbol for this signal in one of your

    libraries. The name of the supply pin determins the name of the

    signal EAGLE expects to be connected to. Renaming the net will

    result in a warning.

     

    Howto define a supply symbol:

     

     Create a new Symbol in the library

     Place the pin, with direction Supply

     Pin name corresponds to the signal name

     Set Value placeholder

     

     Create a new Device

     Device name is signal name

     Package assignment not necessary

     

     

     

    --

    Mit freundlichen Gruessen / Best regards

    Richard Hammerl

    CadSoft Support -- hotline@cadsoft.de

    FAQ: http://www.cadsoft.de/faq.htm

     

Reply

  • Marco Trapanese schrieb:

    Hello,

     

    my board has several power supply nets. I want to use only one symbol

    for Vdd and GND (because has no sense to use 5-6 different symbols) with

    explicit lables.

     

    Something like this:

     

    Vcc_main

    GND_main

     

    Vcc_analog

    GND_analog

     

    Vcc_RS485

    GND_RS485

     

    and so on...

     

    I place the power supply symbol on the schematic, connected to the net,

    and then I rename that net to its own (see above).

     

    Checking with the 'show' command I'm sure the nets don't mix up.

     

    Anyway, the ERC screams:

     

    WARNING: Sheet 1/5: SUPPLY Pin +5V overwritten with +5V_485

    ERROR: Sheet 1/5: SUPPLY Pin +5V overwritten with more than one signal

    (+5V, +5V_485)

     

     

    Hence I ask you: what's the right way to use different power supply nets

    - using only one symbol?

     

     

    You had to define a supply symbol for this signal in one of your

    libraries. The name of the supply pin determins the name of the

    signal EAGLE expects to be connected to. Renaming the net will

    result in a warning.

     

    Howto define a supply symbol:

     

     Create a new Symbol in the library

     Place the pin, with direction Supply

     Pin name corresponds to the signal name

     Set Value placeholder

     

     Create a new Device

     Device name is signal name

     Package assignment not necessary

     

     

     

    --

    Mit freundlichen Gruessen / Best regards

    Richard Hammerl

    CadSoft Support -- hotline@cadsoft.de

    FAQ: http://www.cadsoft.de/faq.htm

     

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