Hello,
i use the declaration in atmel studio (file c): It works
static FILE mydata=FDEV_SETUP_STREAM(ili9341_putchar_printf, NULL, _FDEV_SETUP_WRITE); -
but when i use it in Atmel studio (file C++) : there error compilation
when i compile the code, this error is display
Error sorry, unimplemented: non-trivial designated initializers not supported
Please Help Me
Thanks
Note - i havent looked into this too deeply, but you have stumbled across a difference between c and c++. The simple solution is to put the code into a .c file. Be aware of c++ name mangling when mixing c and c++ files. Read up on extern “c”
Error sorry, unimplemented: non-trivial designated initializers not supported
That's a C++ language thing.
"Designated initalisers" are about initialising the fields in a struct by name - rather than just by position - and C++ does not support this.
As an extension, GCC provides limited support for "Designated initalisers" - these are the "trivial" cases. You've tried to go beyond that into non-trivial cases.
Putting the error message text into google will get you all the details.
FDEV_SETUP_STREAM is a macro - presumably it relies upon "Designated initalisers"
EDIT
https://www.avrfreaks.net/forum/fdevsetupstream-c
EDIT 2
Here is the definition of FDEV_SETUP_STREAM - from stdio.h:
#define FDEV_SETUP_STREAM(p, g, f) \
{ \
.put = p, \
.get = g, \
.flags = f, \
.udata = 0, \
}The "designations" of the initialisers are highlighted.
so when you write
static FILE mydata=FDEV_SETUP_STREAM(ili9341_putchar_printf, NULL, _FDEV_SETUP_WRITE); -
the preprocessor expands that to
static FILE mydata=
{
.put = ili9341_putchar_printf,
.get = NULL,
.flags = _FDEV_SETUP_WRITE,
.udata = 0,
};
So you could just do that "manually" - as shown in #10 in the above-mentioned thread
This is why there are actually two ways to setup streams shown in the manual:
https://www.nongnu.org/avr-libc/...
does indeed use designnated initializers which are not supported in C++ but for that you can use the dynamic (runtime) setup:
https://www.nongnu.org/avr-libc/...
As mentioned in the thread Andy linked to you can simply do it "raw":
but fdev_setup_stream() can simply be used as a "helper" for this:
That is .cpp and it builds cleanly.
(aside: foo() is not related and was something I used in this example file previously to show someone a different thing (how to link to C))
Hello Evry one
Thanks you for your response
I will give you a feedback
Hello
THANKS YOU
I use this code , it work now
____________________________________
extern "C" {
#include ...
#include ...
};
int main(void){
FILE mydata;
mydata.put = ili9341_putchar_printf;
mydata.get = NULL;
mydata.flags = _FDEV_SETUP_WRITE;
_____________________________
it work now
thanks for feedback; now please mark the solution - see Tip #5 in my signature(below) for instructions
Also see Tip #1 for how to properly post source code
Ok, thanks for this detail.
