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Compile Error with Custom putchar

Offline Nick Purdue over 9 years ago

Note: This was originally posted on 5th January 2012 at http://forums.arm.com

Hello,

I am new to ARM and uVision and have my first problem.

The firmware i am trying to compile used to work with old compiler but fails with the new compiller ARMCC V3.0.0.947 using uVision 3.34

It does not like my own putchar, i get following errors...

comms.h(74): error: #79: expected a type specifier ........this is my prototype
comms.c(3866): error: #79: expected a type specifier
comms.c(3866): error: #141-D: unnamed prototyped parameters not allowed when body is present

The prototype in H file is....

int putchar(int Inch); This is at line 74 of include file

the first line if the function is..

int putchar(int Inch) This is at line 3886 of source file
{

}

Please tell me what is going wrong

Nick

Offline Scott Douglass over 9 years ago

Note: This was originally posted on 5th January 2012 at http://forums.arm.com

It might be that there's some '#define Inch ...' or -DInch=... that's interfering.
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Offline Nick Purdue over 9 years ago

Note: This was originally posted on 5th January 2012 at http://forums.arm.com

It might be that there's some '#define Inch ...' or -DInch=... that's interfering.

No that not it, it seems to be to do with i am re-defining putchar and that its already in "stdio.h" but i thought you could do that, i have also changed the Inch to just ch to match the putchar in "stdio.h"
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Offline Scott Douglass over 9 years ago

Note: This was originally posted on 5th January 2012 at http://forums.arm.com

Oh, yes. It's puchar itself that's the #define -- but I should have looked at the larger context before answering.

If you want to intercept stdio you want to use the "retargeting" interface. For example http://www.keil.com/...argetcortex.htm
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