An Introduction to GCC for the GNU Compilers gcc and g++ #1

#ifndef __LWIPOPTS_H__ #define __LWIPOPTS_H__ /** * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain * critical regions during buffer allocation, deallocation and memory * allocation and deallocation. */ #define SYS_LIGHTWEIGHT_PROT 0 #define ETHARP_TRUST_IP_MAC 0 #define IP_REASSEMBLY 0 #define IP_FRAG 0 #define ARP_QUEUEING 0 #define TCP_LISTEN_BACKLOG 1 /** * NO_SYS==1: Provides VERY minimal functionality. Otherwise, * use lwIP facilities. */ #define NO_SYS 0 ادامه مطلب...

Creating a Network Application! تو شرکت...؟؟؟، از RL-ARM (MDK v4) استفاده می کردیم، در آنجا هدف گرفتن داده های سنسورهای محیطی، ذخیره آنها... یک سیستم Data logger بود... سرعت هم زیاد اهمیت نداشت...! RL: Real-Time Library اوایل کارم... پولی بود... Crackشم پیدا نمی شد... Migrate RTX to CMSIS-RTOS RTX هنگام شروع به کار با MDK-ARM Version 5.00، این مهاجرت اجباری است! RTX5 (Keil RTX v5) supplies both API layers: 1- CMSIS-RTOS v1 2- CMSIS-RTOS v2 ادامه مطلب...

The flags field indicates what UDP checksum policy that should be used for a UDP session. This can be either to switch UDP checksumming off completely, or to use UDP Lite in which the checksum covers only parts of the datagram... // main.c static void vSetupIFTask (void *pvParameters) { ... while (1) { physts = lpcPHYStsPoll(); if (physts & PHY_LINK_CHANGED) { if (physts & PHY_LINK_CONNECTED) { tcpip_callback_with_block((tcpip_callback_fn) netif_set_link_up, (void *) &lpc_netif, 1); } else { tcpip_callback_with_block((tcpip_callback_fn) netif_set_link_down, (void *) &lpc_netif, 1); } vTaskDelay(configTICK_RATE_HZ / 4); ...

The lwIP provides two APIs for use by applications: RAW API: The raw API is customized for high performance and lower memory overhead. The limitation of raw API is that it is callback-based, and consequently does not provide portability to other TCP stacks. Best Performance & Code Size Complex For Application Development Socket API: The socket API provides a BSD socket-style interface and is very portable; however, this mode is not as efficient as raw API mode in performance and memory requirements. BSD Socket-style API → (Open-Read-Write-Close) Very Portable...

LPC1768 - Max. CPU speed: 100 MHz - Flash: 512 kB - Total SRAM: 64 kB IROM1 : 0x0000 0000 - 0x0008 0000 : 512 kB on-chip flash IRAM1 : 0x1000 0000 - 0x1000 8000 : 32 kB local static RAM IRAM2 : 0x2007 C000 - 0x2008 4000 : 32 kB AHB SRAM (2 blocks of 16 kB) RAM usage = ZI-data + RW-data Flash usage = Code + RO-data + RW-data ادامه مطلب...