|
|||||||||||||||
FreeRTOS Support ArchiveThe 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.
Loading
LWIP stack on ARM7 SAM7 from AtmelPosted by spreet on April 23, 2009 I am looking at the Rowley port of lwIP stack for SAM7 under: lwip_Demo_Rowley_ARM7 In the file ethernetif.c - under routine static struct pbuf *low_level_input(...), it creates and uses xRxSemaphore. It is not clear as to how this is being used? I am not able to see where any other task is trying to acquire this sema? Am I missing something on the use of sema's? Thanks RE: LWIP stack on ARM7 SAM7 from AtmelPosted by Dave on April 23, 2009 It is declared static within the function so no other function can use it. It looks like it is just protecting access to the Ethernet peripheral to make it thread safe. RE: LWIP stack on ARM7 SAM7 from AtmelPosted by spreet on April 23, 2009 Thanks for the quick response. I am still confused - Since this is the only place where this is being used any other thread can still access it if it does not know that this is protected by this semaphore? Or is there something more to it that I need to read about. Thanks again RE: LWIP stack on ARM7 SAM7 from AtmelPosted by Dave on April 23, 2009 If the function is only ever called from one task then I would say the semaphore is not needed. RE: LWIP stack on ARM7 SAM7 from AtmelPosted by spreet on April 23, 2009 Thanks
Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.
|
|||||||||||||||
NXP tweet showing LPC5500 (ARMv8-M Cortex-M33) running FreeRTOS.
Meet Richard Barry and learn about running FreeRTOS on RISC-V at FOSDEM 2019
Version 10.1.1 of the FreeRTOS kernel is available for immediate download. MIT licensed.
View a recording of the "OTA Update Security and Reliability" webinar, presented by TI and AWS.
FreeRTOS and other embedded software careers at AWS.
