FreeRTOS Support Archive
The FreeRTOS support forum is used to obtain active support directly from Real
Time Engineers Ltd. In return for using our top quality software and services for
free, we request you play fair and do your bit to help others too! Sign up
to receive notifications of new support topics then help where you can.
This is a read only archive of threads posted to the FreeRTOS support forum.
The archive is updated every week, so will not always contain the very latest posts.
Use these archive pages to search previous posts. Use the Live FreeRTOS Forum
link to reply to a post, or start a new support thread.
[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [August 2008 Threads] lwIP_Demo_Rowley_ARM7 and CDC receiving bytePosted by Steve MULLER on August 13, 2008 Hi,
I am new to FreeRTOS. Seems to be a great OS. I try to modify the demo code to have a simple ping-pong over the CDC.
I add the following lines to several files :
* lwIP_Demo_Rowley_ARM7\USB\USB-CDC.c:262 unsigned vUSBReceiveByte( portCHAR * cByte ) { if ( uxQueueMessagesWaiting( xRxCDC ) != 0 ) { xQueueReceive( xRxCDC, cByte, usbNO_BLOCK ); return 1; } return 0; } /*------------------------------------------------------------*/
* lwIP_Demo_Rowley_ARM7\USB\USB-CDC.h:99 unsigned vUSBReceiveByte( portCHAR * cByte );
* lwIP_Demo_Rowley_ARM7\main.c:313 if ( vUSBReceiveByte( &cTxByte )) { vUSBSendByte( cTxByte ); }
With this code the OS seems to be completly frozen.
What is false in my code ? And why ?
Thanks in advance.
Steve
P.S. : I use the V5.0.2 of FreeRTOS.
RE: lwIP_Demo_Rowley_ARM7 and CDC receiving bytePosted by Dave on August 13, 2008 I think this demo uses an idle task hook function or something similar to continuously send characters in the background. Did you remove this code first? Just setting configUSE_IDLE_HOOK to 0 in FreeRTOSConfig.h might be enough.
RE: lwIP_Demo_Rowley_ARM7 and CDC receiving bytePosted by Steve MULLER on August 13, 2008 Hi,
Currently, I use this hook to handle the Queue over vUSBReceiveByte(). I removed the code who continuously send characters.
Thanks. Steve
Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.
|