[ell-i-developers] Re: FYI: ENCx24J600 driver ; SPI testing
- From: Pekka Nikander <pekka.nikander@xxxxxx>
- To: Asif Sardar <engr.asif.sardar@xxxxxxxxxxxxxx>
- Date: Fri, 4 Jul 2014 08:48:40 +0300
On 2014–07–03, at 20:09 , Asif Sardar <engr.asif.sardar@xxxxxxxxxxxxxx> wrote:
> I was compiling the SPI from library by including the .o files inside the
> app.mk e.g. following lines added
>
> APP_OBJS ?= main.o $(APP).o $(VARIANT).o wiring_digital.o
> wiring_digital_pinMode.o ellduino_Serial.o ellduino_spi.o SPIClass.o
> spiStruct.o
>
> VPATH += $(TOP)cores/arduelli $(TOP)variants/$(VARIANT) $(TOP)libraries/SPI
>
> Also, I splitted the wiring_digital.h and wiring_digital_pinmode.h into there
> own source (.c) files to avoid multiple declaration, because the SPIClass.h
> is also including the wiring_digital.h using the digitalWrite and pinMode
> functions. The files are attached to the e-mail.
>
> Still I am getting following error:
>
> ellduino_spi.o: In function `SPIClass::begin(unsigned char) const':
> /home/asif/Ell-i-Working-Directory/Ell-i-Software-Development/Runtime/stm32/build/../libraries/SPI/./SPIClass.h:81:
> undefined reference to `digitalWrite'
> ellduino_spi.o: In function `SPIClass::activate_ss(unsigned char)':
> /home/asif/Ell-i-Working-Directory/Ell-i-Software-Development/Runtime/stm32/build/../libraries/SPI/./SPIClass.h:183:
> undefined reference to `digitalWrite'
> ellduino_spi.o: In function `SPIClass::deactivate_ss(unsigned char)':
> /home/asif/Ell-i-Working-Directory/Ell-i-Software-Development/Runtime/stm32/build/../libraries/SPI/./SPIClass.h:184:
> undefined reference to `digitalWrite'
>
> Any good ideas?
For a quick fix, try changing the order of the objects in the command line. If
that does not help, then I guess SPIClass.h is referring to digitalWrite as a
C++ function while it is declared as a C function, or something similar.
Please check how the files get included and if there are any warnings.
--Pekka
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