13 Replies Latest reply on Sep 11, 2014 1:56 PM by bob.marlowe

SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 9:35 PM

Hi, I am attempting to modify an existing design to add a WaveDAC8. I receive the following error: Resource limit: Maximum number of SC Fixed Blocks exceeded (max=0, needed=1). The requested resource was not available the quantity required by the design. Update the design or select a device with a greater number of the resource requested. What does that mean and how do I fix it? Thanks.

1. Re: SC Fixed Blocks exceeded

bob.marlowe Sep 11, 2014 11:59 AM (in response to user_352784942)

Which device are you programming for?

The errormessage states that you are using a component that is not contained within your selected device.



Bob
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2. Re: SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 12:03 PM (in response to user_352784942)

Hi, And thanks very much for getting back to me. The device is the PSoC 3. This is a bit strange as I have a test configuration (downloaded from the message board) that compiles fine. I will check the configured device in the test configuration.
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3. Re: SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 12:07 PM (in response to user_352784942)

Ah, OK. The test configuration is for a PSoC 5. Ok, so this begs another question. If the WaveDAC8 only permitted with the PSoC 5, why PSoC creator even allowing it to be configured at all? At least give a warning that this particular component is not compatible with the PSoC 3.
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4. Re: SC Fixed Blocks exceeded

user_14586677 Sep 11, 2014 12:28 PM (in response to user_352784942)

There is a Wavedac component and example project in

Creator 3.0 for PSOC 3.







Consider posting your project, makes life easier to troubleshoot.



“File”                                                             Creator

“Create Workspace Bundle”

Use Firefox or IE, not chrome to post.





Regards, Dana.
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5. Re: SC Fixed Blocks exceeded

bob.marlowe Sep 11, 2014 12:35 PM (in response to user_352784942)

The WaveDac8 runs on a PSoC3, so it must be something different.

If you want more help, best would be to post the complete project. To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file (you may use chrome, that should work from now on).



Bob
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6. Re: SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 12:45 PM (in response to user_352784942)
Hello Bob, Yes, you are absolutely correct I should have included the project in my original post. I will do that from now on should I encounter further issues. Please find attached the bundle. Please note it is a work in progress and it is not a finished design. Thanks, Ron

peaberry-iambic.cywrk.Archive01.zip 880.8 K
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7. Re: SC Fixed Blocks exceeded

bob.marlowe Sep 11, 2014 1:56 PM (in response to user_352784942)

You do not have got a PGA or an inverting PGA on your selected PSoC3-chip.

Bob
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8. Re: SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 2:43 PM (in response to user_352784942)

Hi, Yes, removing the PGA eliminated the error. Thanks for you assistance. Do you have any suggestions as to a follow on component to the WaveDac8?. I have tried the Opamp component but that simply reintroduces the Fixed blocks error again. Thanks, Ron
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9. Re: SC Fixed Blocks exceeded

bob.marlowe Sep 11, 2014 2:57 PM (in response to user_352784942)

You need to select a different chip, one with sc blocks. look into device selector.

Bob
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10. Re: SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 3:06 PM (in response to user_352784942)

Hi, Ok, thanks again. I can't select a different chip. I'm working with a hardware design at is fixed. I am working with the firmware to allow for slightly different functionality. So it appears I can not add the functionality I had hoped for. Thanks gain for your help. Ron
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11. Re: SC Fixed Blocks exceeded

bob.marlowe Sep 11, 2014 4:35 PM (in response to user_352784942)

You may use the same PCB but a different pin-compatible chip as the CY8C3446PVI

Bob
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12. Re: SC Fixed Blocks exceeded

user_14586677 Sep 11, 2014 4:48 PM (in response to user_352784942)

Keep in mind Wavedac component is really nothing more than

a VDAC followed by a buffer. The VDAC8 has a hi Z out, so generally

you would buffer.16K ohms typ at 4V range. So if you can design

external circuits to accomidate the Hi Z no reason you cannot have

your own solution w/o need for OpAmp/PGA.



The rest of the solution is a table of values in memory for the waveshape,

and DMA, pretty simple. And a timer that controls rate at which DMA accesses

table. That sets frequency.



Regards, Dana.
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13. Re: SC Fixed Blocks exceeded

user_352784942 Sep 11, 2014 9:35 PM (in response to user_352784942)

Hi, Thanks for all the suggestions. Everyone has been very helpful. Upgrading to another pin capable chip in future releases of the PCB, but that will not address current owners. (The devices is a software defined radio named Peaberry). As for adding an external device, yes that is very doable and I am moving forward with that notion. It will be controlled via one of the existing pins that has already be externalized. Thanks again.
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