S12 / MagniV MicrocontrollersのトピックHow to transfer variables between main.c and Event.c

How to transfer variables between main.c and Event.c

aaronlee — Mon, 23 Jul 2018 09:10:28 GMT

Hi,

We are using S12ZVCA with processor expert. How to transfer variables between main.c and Event.c?

main.c as follow:

unsigned int i;
void main(void)
{
   .........
   for(;;)
   {
    SCI_Send(i);
   }
   .........
}
........
/*
** ###################################################################
**
** This file was created by Processor Expert 10.3 [05.09]
** for the Freescale HCS12Z series of microcontrollers.
**
** ###################################################################
*/

Event.c as follow:

unsigned int i;
void TI1_OnInterrupt(void)
{
++i; // How to transfer i to main.c
}

Best regards,

Aaron

Re: How to transfer variables between main.c and Event.c

dianabatrlova — Mon, 23 Jul 2018 12:48:46 GMT

Hi Aaron,

Create a global variable in your own source file can be the solution as you can see on the below link:

https://community.nxp.com/message/24869?commentID=24869#comment-24869

There is a description with different Code Warrior and MCU, but the principle is the same.

I hope it helps you.

Best regards,

Diana

Re: How to transfer variables between main.c and Event.c

aaronlee — Tue, 24 Jul 2018 09:40:26 GMT

Hi Diana,

Thanks for you quick reply. We got the link error as follow:

myfunc.c

#include "myfunc.h"
unsigned char TI1_CountUp;
unsigned char foo(void)
{
return TI1_CountUp;
}

myfunc.h

#ifndef MYFUNC_H_
#define MYFUNC_H_
extern unsigned char TI1_CountUp;
unsigned char foo(void);
#endif /* MYFUNC_H_ */

Event.c

#include "Cpu.h"
#include "Events.h"
/* User includes (#include below this line is not maintained by Processor Expert) */
#include "Board_B0005_v100.h"
#include "myfunc.h"
............
void TI1_OnInterrupt(void)
{
/* Write your code here ... */
++TI1_CountUp;
}
............

main.c

/* Including needed modules to compile this module/procedure */
#include "Cpu.h"
#include "Events.h"
.........
/* User includes (#include below this line is not maintained by Processor Expert) */
#include "myfunc.h"
.........
void main(void)
{
   ........
   /* Write your code here */
   for(;;)
   {
      do{} while(!AS1_GetTxComplete());
      AS1_SendChar(TI1_CountUp);
   }
}

How to resolve the issue:

ERROR L1822: Symbol __copy in file C:/....../FLASH/Sources\main_c.obj is undefined

Best regards,

Aaron