9 years, 4 months ago.

call mbed from C library

Dear mbed community,

I am trying to use mbed with STM32Cube_FW_F4_V1.7.0. I have downloaded mbed-src and inserted the required files. Digital_IO-s and Serial already working! Now I would like to write out an error message if a hard fault is happened by using the Serial class. In the file stm32f4xx_it.c I found the empty function:

/**
  * @brief  This function handles Hard Fault exception.
  * @param  None
  * @retval None
  */
void HardFault_Handler()
{

  while (1);
}

The program is compiles and working until this point. If I generate hardfault I find myself in the infinite loop. I can also write some message to the terminal from the main.cpp.

I would like to use Serial class with printf to write some error message. First step is to include mbed.h to stm32f4xx_it.c.

#include "mbed.h"

After this the program won't compile the error message is the following:

Of course the file is there and if I delete the line #include "mbed.h" everything is fine again. From main.cpp I can #include "mbed.h" without a problem.

Maybe there is a problem with calling C++ from C library? Why the error came up in platform.h?

platform.h contains this

#ifndef MBED_PLATFORM_H
#define MBED_PLATFORM_H

#define MBED_OPERATORS    1

#include "device.h"
#include "PinNames.h"
#include "PeripheralNames.h"

#include <cstddef>
#include <cstdlib>
#include <cstdio>
#include <cstring>

#endif

Thank you in advance! Dave