F439_CPP_TX-RX_LoRa_Project

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Functions
sysmem.c File Reference

STM32CubeIDE System Memory calls file. More...

`#include <errno.h>`
`#include <stdint.h>`
Include dependency graph for sysmem.c:

## Functions
void * | _sbrk (ptrdiff_t incr)
| _sbrk() allocates memory to the newlib heap and is used by malloc and others from the C library

## Detailed Description

STM32CubeIDE System Memory calls file.

Author
  Generated by STM32CubeIDE

             For more information about which C functions
             need which of these lowlevel functions
             please consult the newlib libc manual

Attention

Copyright (c) 2025 STMicroelectronics. All rights reserved.

This software is licensed under terms that can be found in the LICENSE file in the root directory of this software component. If no LICENSE file comes with this software, it is provided AS-IS.

## Function Documentation

## ◆ _sbrk()

void * _sbrk | ( | ptrdiff_t | incr | ) |

_sbrk() allocates memory to the newlib heap and is used by malloc and others from the C library

    * ############################################################################
    * #  .data  #  .bss  #       newlib heap       #          MSP stack          #
    * #         #        #                         # Reserved by _Min_Stack_Size #
    * ############################################################################
    * ^-- RAM start      ^-- _end                             _estack, RAM end --^
    *

This implementation starts allocating at the '_end' linker symbol The '_Min_Stack_Size' linker symbol reserves a memory for the MSP stack The implementation considers '_estack' linker symbol to be RAM end NOTE: If the MSP stack, at any point during execution, grows larger than the reserved size, please increase the '_Min_Stack_Size'.

Parameters

  incr | Memory size

Returns
  Pointer to allocated memory