Porting Arduino Library - Compile Errors

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Porting Arduino Library - Compile Errors

(5 posts) (2 voices)

Started 4 years ago by mikep
Latest reply from mikep

mikep
Member

Hi All,
I am trying to port the Arduino Ethernet library (for ENC28J60) to the Maple. The Arduino library is located here: http://blog.thiseldo.co.uk/?p=570
I did all the type conversions (unit8_t -> uint8 etc.) and took out the avr-specific includes, but now I am at a point where I get some cryptic (to me at least) compile errors as soon as I try to include "wirish.h"
The errors are like this:
from C:\Users\Michael\Documents\MapleIDE\libraries\EtherShield28J60_062011\enc28j60.c:21:
C:\Program Files (x86)\Leaflabs_Maple\maple-ide-0.0.11\hardware\leaflabs\cores\maple/boards.h:118: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'boardUsesPin' from C:\Users\Michael\Documents\MapleIDE\libraries\EtherShield28J60_062011\enc28j60.c:21: C:\Program Files (x86)\Leaflabs_Maple\maple-ide-0.0.11\hardware\leaflabs\cores\maple/io.h:201: error: expected ';', ',' or ')' before '=' token from C:\Users\Michael\Documents\MapleIDE\libraries\EtherShield28J60_062011\enc28j60.c:21: C:\Program Files (x86)\Leaflabs_Maple\maple-ide-0.0.11\hardware\leaflabs\cores\maple/wirish_math.h:56: error: conflicting types for 'random' C:\Program Files (x86)\Leaflabs_Maple\maple-ide-0.0.11\hardware\leaflabs\cores\maple/wirish_math.h:47: note: previous declaration of 'random' was here from C:\Users\Michael\Documents\MapleIDE\libraries\EtherShield28J60_062011\enc28j60.c:21:
C:\Program Files (x86)\Leaflabs_Maple\maple-ide-0.0.11\hardware\leaflabs\cores\maple/HardwareSPI.h:71: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'HardwareSPI'
This goes on for a while, basically most of the files include'd in wrish.h generate a similar error.
Line 21 in enc28j60.c is this:
#include "wirish.h"
What am I doing wrong?
These low-level files I am working on are C files that are used by the Ethernet.cpp file.
Can wirish not be included in a C file? Is there any better way to troubleshoot this and get to the bottom of this error?
Thank you,
Mike

Posted 4 years ago #
poslathian
LeafLabs
Ill let iperry or mbolivar correct me here but I think the answer is likely that in your case you cant. In general, you can mix and match c/c++ files if:

A) all your c code declarations are wrapped in an appropriate
```
#ifdef __cplusplus
extern "C" {
#endif
```
blocks (see any random .h file in libmaple)

B) you are using the correct c++ compiler (arm-none-eabi-g++ not arm-none-eabi-gcc). You can see in a regular libmaple command line build how the compiler is treating C and C++ files with different compilers.

If you provide a bit more information about your build environment, and link to sources, we can probably track down where its going wrong. You might have success just by changing the C files that include wirish to .cpp files.
Posted 4 years ago #
mikep
Member
Thank you for your answer postlathian,
I am using the regular Maple IDE (0.0.11), which is probably not the best idea when porting a library from Arduino :)
I already had the .h file wrapped in the directive
```
<br />
#ifdef __cplusplus<br />
extern "C" {<br />
#endif<br />
```
And I also looked at the EEPROM library here: https://github.com/adamfeuer/libmaple/tree/eeprom_25xxx/libraries/EEPROM25xxx which also has a C API and is including wirish.h.
Posted 4 years ago #
poslathian
LeafLabs

can you link to your port in its current state, Ill see If I can get it to build

Posted 4 years ago #
mikep
Member

Alright, I will get something posted. In the meantime I have the Ethernet library (for ENC28J60) and a simple webserver working on another STM32 board, using the STM Library SPI and GPIO config commands and pure C. Now I still want to port this to the Maple, I think my biggest issue is really not understanding the C/C++ mix, because the existing library consists of a bunch of .c and .h files and I guess that is where it falls down. But I'll let you know when I have it uploaded.
Mike

Posted 4 years ago #

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