I am doing this

uint8 temp;

temp= ControlReg_Read();

Where 'ControlReg' is a control register i named and initialized in TopDesign.cysch

In an Interrupt service routine .

Its giving  the error 

Error: L127 UNRESOLVED EXTERNAL SYMBOL SYMBOL:  ControlReg_Read MODULE:  C:\Users\Antimatter\Documents\PSoC Creator\Design02\Design02.cydsn\DP8051-Keil_Generic\Debug\main.OBJ (MAIN)

Someone please tell me the solution to this.

Hi,

Please check if the name of the "ControlReg" component that placed in your schematic is "Control_Reg_1" or something else other than ''ControlReg', in default, it is "Control_Reg_1",  please change the name to "ControlReg" that aligns with the API you used in the code.

Regards,

Roy

Hi,

I have exactly the same problem. I've double-checked the names, changed the names. Nothing happening.

How can I fix ? This is quite urgent

Thank you

GianLuca

Would it be possible for you to upload the code you are having problems with?

Here attached !

Thank you

GianLuca

Try attaching a digital output pin ( Ports and Pins -> Digital Output Pin) to the TestReg output.

In the original project (this is a simplified project) my RegControl output is connected to one input of an AND port, the other one input of the port is connected to a physical port pin (configured as digital input). The output of the AND is connected to a physical digital output. And it doesn't work.....

GianLuca

Ok, my output MUST have a HW Connection.... sorry :-))))))

When I set it up as you described I don't get a compile time error. The only way I can replicate that error is by disconnecting something, I'm sure that isn't the problem on your end but it might be worth checking. Also, if your control reg has more than 1 output but you only have one output connected, that would cause this error.

Ahh, ok then. Glad you figured it out =)

Yes, there's a message indicating that "unused parts of your design have been optimized out". Seems to be a truely comment from the fitter: it has optimized-out yout control-register.

Stay optimistic (optimizing)

Bob