Quality RTOS & Embedded Software

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




Loading

Cant take off USB CDC task

Posted by Nobody/Anonymous on September 3, 2005
When I remove the line that creates the USB task from the lwIP project - the next time I compile and run I get a data abort exception. How can not creating the USB task cause an exception?

RE: Cant take off USB CDC task

Posted by Richard on September 3, 2005
Have you removed the idle task hook that writes to the USB port? If you don't initialise the USB port but try to write to it, it could well crash.

Remove the line
vUSBSendByte( cTxByte );

from the function
vApplicationIdleHook();

define in file
FreeRTOS/Demo/lwIP_Demo_Rowley_ARM7/main.c

Regards.


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




Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.

Latest News

FreeRTOS kernel V10 is available for immediate download. Now MIT licensed.


FreeRTOS Partners

ARM Connected RTOS partner for all ARM microcontroller cores

IAR Partner

Microchip Premier RTOS Partner

RTOS partner of NXP for all NXP ARM microcontrollers

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

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

OpenRTOS and SafeRTOS