Quality RTOS & Embedded Software

 Real time embedded FreeRTOS RSS feed 
Real time embedded FreeRTOS mailing list 
Quick Start Supported MCUs PDF Books Trace Tools Ecosystem TCP & FAT Training




Loading

Question regarding heap2 in freertos

Posted by Bill Yang on February 23, 2010
Hi,

I wonder if any one knows the answer regarding the heap2 use. My project is based on the demo from freertos. It is using heap2 and has defined the heap size 24000 as below.

#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 24000 ) )

However, after compiling and link, I looked at myproject.map file and found the heap2.0 has allocate ZI RAM by 24004 that is exceeding its defined.

Code (inc. data) RO Data RW Data ZI Data Debug Object Name
568 78 0 24 7460 5153 emac.o
1076 96 4 0 0 6743 flash_packet.o
228 42 0 0 0 4188 flash_uart.o
* 220 14 0 20 24004 3339 heap_2.o

Why there is different between the definition and actually allocating? If this is a problem, how can I fix it?

Thanks,
Bill

RE: Question regarding heap2 in freertos

Posted by Richard on February 25, 2010
I have no idea why that would be, but would guess it was simply something to do with memory alignment padding.

Regards.


[ Back to the top ]    [ About FreeRTOS ]    [ Sitemap ]    [ ]




Copyright (C) 2004-2010 Richard Barry. Copyright (C) 2010-2016 Real Time Engineers Ltd.
Any and all data, files, source code, html content and documentation included in the FreeRTOSTM distribution or available on this site are the exclusive property of Real Time Engineers Ltd.. See the files license.txt (included in the distribution) and this copyright notice for more information. FreeRTOSTM and FreeRTOS.orgTM are trade marks of Real Time Engineers Ltd.

Latest News:

FreeRTOS V9.0.0 is now available for download.


Free TCP/IP and file system demos for the RTOS


Sponsored Links

⇓ Now With No Code Size Limit! ⇓
⇑ Free Download Without Registering ⇑


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

Renesas Electronics Gold Alliance RTOS Partner.jpg

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

Atmel RTOS partner supporting ARM Cortex-M3 and AVR32 microcontrollers

STMicro RTOS partner supporting ARM7, ARM Cortex-M3, ARM Cortex-M4 and ARM Cortex-M0

Xilinx Microblaze and Zynq partner

Silicon Labs low power RTOS partner

Altera RTOS partner for Nios II and Cortex-A9 SoC

Freescale Alliance RTOS Member supporting ARM and ColdFire microcontrollers

Infineon ARM Cortex-M microcontrollers

Texas Instruments MCU Developer Network RTOS partner for ARM and MSP430 microcontrollers

Cypress RTOS partner supporting ARM Cortex-M3

Fujitsu RTOS partner supporting ARM Cortex-M3 and FM3

Microsemi (previously Actel) RTOS partner supporting ARM Cortex-M3

Atollic Partner

IAR Partner

Keil ARM Partner

Embedded Artists