The FreeRTOS kernel is now an MIT licensed AWS open source project, and these pages are being updated accordingly.

The FreeRTOS Ecosystem Showcase . . . A Selection of Add-on and Complementary Products    Homepage FreeRTOS+ Products FreeRTOS Labs Support Forum Contact / Enquiries

FreeRTOS Labs  FreeRTOS+POSIX:  POSIX API for FreeRTOS  FreeRTOS+FAT:  Thread aware file system

pucGetNetworkBuffer() [Ethernet Driver Porting API] FreeRTOS_IP_Private.h NetworkBufferManagement.h uint8_t *pucGetNetworkBuffer( size_t *pxRequestedSizeBytes ); Data that is sent out to the network or received from the network is stored in a network buffer. A network buffer is basically just a block of RAM (actually an array of uint8_t in the source code). The embedded TCP/IP stack needs to first locate the network buffers, and once located know how big the network buffers are. Network buffer descriptors are used for that purpose. Whereas pxGetNetworkBufferWithDescriptor() obtains a network buffer descriptor that can (optionally) reference an Ethernet buffer, pucGetNetworkBuffer() just obtains the Ethernet buffer itself and would normally only be used allocate buffers to DMA descriptors in zero copy drivers. pucGetNetworkBuffer() must not be called from an interrupt service routine (ISR). Parameters: xRequestedSizeBytes   The size of the Ethernet buffer to obtain. The size is specified in bytes. Returns: Successful calls return a pointer to the obtained Ethernet buffer. Unsuccessful calls return NULL. Example usage: Examples are provided on the Porting FreeRTOS to a Different Microcontroller page. [ Back to the top ]    [ About FreeRTOS ]    [ Privacy ]    [ FreeRTOS Labs Sitemap ]    [ Main FreeRTOS Sitemap ]    [ ] Copyright (C) Amazon Web Services, Inc. or its affiliates. All rights reserved.