SC Fixed Blocks exceeded

[Anonymous]

        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.   

[Bob_Marlowe]

Which device are you programming for?

   

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

       

Bob

[Anonymous]

        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.   

[Anonymous]

        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.   

[ETRO_SSN583]

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.

[Bob_Marlowe]

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
 

[Anonymous]

        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   

[Bob_Marlowe]

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

       

Bob

[Anonymous]

        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   

[Bob_Marlowe]

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

       

Bob

[Anonymous]

        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   

[Bob_Marlowe]

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

       

Bob

[ETRO_SSN583]

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.

[Anonymous]

        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.