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

HS08 Port H register stacking problem

Posted by Nobody/Anonymous on November 11, 2006
The pshh asm instruction should follow psha to be consistent with portRESTORE_CONTEXT and the pxPortInitialiseStack function's context restore unstacking order. For example, this incorrect order caused obvious issues with the H:X register pair (HS08 parameter passing convention only) being passed the correct 16-bit pointer address through pvParameters during the first call to the created task after the scheduler is started. The code in question is shown below.

#define portSAVE_CONTEXT()\
{\
extern volatile void * pxCurrentTCB;\
extern volatile unsigned portBASE_TYPE uxCriticalNesting;\
\
__asm( "pshh" );/* Save H context */ \
__asm( "lda uxCriticalNesting" );\
__asm( "psha" );\

RE: HS08 Port H register stacking problem

Posted by Nobody/Anonymous on November 11, 2006
Where did you get the code from? There is not an official HS08 port as far as I know. I cannot find the code you highlight in the download. ???

RE: HS08 Port H register stacking problem

Posted by Nobody/Anonymous on November 11, 2006
Here's the link:

http://forums.freescale.com/attachments/freescale/8BITCOMM/2709/1/FreeRTOS_HC(S)

RE: HS08 Port H register stacking problem

Posted by Nobody/Anonymous on November 11, 2006
Can you write on that forum or to the author of the port?


[ 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