MCUXpresso IDE中的主题 Re: Basic question about strcpy with MCUxpresso:

Basic question about strcpy with MCUxpresso:

marianiordan — Thu, 21 Dec 2017 05:14:42 GMT

Basic question about strcpy: I am using MCUxpresso IDE 10.0 for KL26z128 processor, and I am getting a compile error on following piece of code - need some help with it.

376: char LCD_TXT[2][21];
377: strcpy(LCD_TXT[0], 'def');
378: strcpy(LCD_TXT[1], 'tuv');

Description Resource Path Location Type
expected declaration specifiers or '...' before '\x646566' main.c /MKL26Z128xxx4_Project/source line 377 C/C++ Problem
expected declaration specifiers or '...' before '\x747576' main.c /MKL26Z128xxx4_Project/source line 378 C/C++ Problem
expected declaration specifiers or '...' before 'LCD_TXT' main.c /MKL26Z128xxx4_Project/source line 377 C/C++ Problem
expected declaration specifiers or '...' before 'LCD_TXT' main.c /MKL26Z128xxx4_Project/source line 378 C/C++ Problem
make: *** [source/main.o] Error 1 MKL26Z128xxx4_Project C/C++ Problem
recipe for target 'source/main.o' failed subdir.mk /MKL26Z128xxx4_Project/Debug/source line 18 C/C++ Problem

if changing as below (and corrected is as per Eric's comments - 12/21), output is slightly different, though still failing:

376: char LCD_TXT[2][21];
377: strcpy(char LCD_TXT[0], char "def");
378: strcpy(char LCD_TXT[1], char "tuv");

Description Resource Path Location Type
expected ';', ',' or ')' before string constant main.c /MKL26Z128xxx4_Project/source line 377 C/C++ Problem
expected ';', ',' or ')' before string constant main.c /MKL26Z128xxx4_Project/source line 378 C/C++ Problem
make: *** [source/main.o] Error 1 MKL26Z128xxx4_Project C/C++ Problem
recipe for target 'source/main.o' failed subdir.mk /MKL26Z128xxx4_Project/Debug/source line 18 C/C++ Problem

Re: Basic question about strcpy with MCUxpresso:

BlackNight — Thu, 21 Dec 2017 09:36:41 GMT

'def' is a multi-byte character, not a string (or array of char).

You have to use double quotes:

strcpy(LCD_TXT[0], "def");
strcpy(LCD_TXT[1], "tuv");

I hope this helps,

Erich

Re: Basic question about strcpy with MCUxpresso:

marianiordan — Thu, 21 Dec 2017 12:00:14 GMT

Eric, thanks for the correction, though still does not solve the error:

strcpy(char LCD_TXT[0], char "def");
strcpy(char LCD_TXT[1], char "tuv");

Description Resource Path Location Type
expected ';', ',' or ')' before string constant main.c /MKL26Z128xxx4_Project/source line 377 C/C++ Problem
expected ';', ',' or ')' before string constant main.c /MKL26Z128xxx4_Project/source line 378 C/C++ Problem
make: *** [source/main.o] Error 1 MKL26Z128xxx4_Project C/C++ Problem
recipe for target 'source/main.o' failed subdir.mk /MKL26Z128xxx4_Project/Debug/source line 18 C/C++ Problem

Re: Basic question about strcpy with MCUxpresso:

hanisamara — Thu, 21 Dec 2017 15:29:06 GMT

Hello,

why you write char befor LCD_TXT[0] in the strcpy statement?

try this: strcpy(LCD_TXT[0], (char*) "def"); or this: strcpy(LCD_TXT[0], "def"); both of them showld works.

Re: Basic question about strcpy with MCUxpresso:

marianiordan — Thu, 21 Dec 2017 21:45:51 GMT

Hani,

Thanks for taking the time. if I don't do char before destination, it complains about it missing (see below). I tried strcpy(LCD_TXT[0], "def") in a different environment (both Arduino gcc and Qt) - everything is fine. however in MCUxpresso I get the error above; below you have the errors for both suggestions you mentioned:

376: char LCD_TXT[2][21];
377: strcpy(LCD_TXT[0], (char*) "def");
378: strcpy(LCD_TXT[1], "tuv");

expected declaration specifiers or '...' before '(' token main.c /MKL26Z128xxx4_Project/source line 377 C/C++ Problem
expected declaration specifiers or '...' before 'LCD_TXT' main.c /MKL26Z128xxx4_Project/source line 377 C/C++ Problem
expected declaration specifiers or '...' before 'LCD_TXT' main.c /MKL26Z128xxx4_Project/source line 378 C/C++ Problem
expected declaration specifiers or '...' before string constant main.c /MKL26Z128xxx4_Project/source line 378 C/C++ Problem

Re: Basic question about strcpy with MCUxpresso:

converse — Fri, 22 Dec 2017 09:29:09 GMT

Looks like it is more likely to be how strcpy is defined. How have you defined strcpy? Have you #include <string.h>?

As an example, this snippet compiles perfectly:

#include <string.h>

void test() {

char LCD_TXT[2][21];

strcpy( LCD_TXT[0], "def");

strcpy( LCD_TXT[1], "tuv");

}

Compare this with your failing example, and see if you can fix it. If not, post a compilable example that reproduces your problem.

Re: Basic question about strcpy with MCUxpresso:

marianiordan — Fri, 22 Dec 2017 18:42:47 GMT

Thanks to all that took their time to read and answer (especially Con Verse for putting the code in the context). The problem I had was trying to use the code outside any function's body, just below global declarations. Now it works as expected.

int initLCD(void) {
   char LCD_TXT[2][21];
   strcpy(LCD_TXT[0], "abc");
   strcpy(LCD_TXT[1], "tuv");
return 0;
}