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learning wifi throughput test using iperf 【Purpose】 Learning how to do wifi throughput test using iperf We can do base on tcp/udp protocol 【Eevironmen 阅读全文
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pseudocode: If(reset_button was pressed ) { Change uboot env bootslot^1 } 阅读全文
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reference :https://forum.openwrt.org/viewtopic.php?id=43237 reference :http://blog.chinaunix.net/uid-22547469-id-5048943.html cp httpd cus531-16m/ -a 阅读全文
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pseudocode: if( getenv(“uboot_env_init”) != NULL){ if(uboot_env_init != HAVE_INIT){ Set uboot_env_init=1; Write to uboot_env partition; }else{ Means u 阅读全文
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design: when uboot load kerne failed,we can switch to stanbdy system; how to realize: when boot fail, we can let uboot env bootKenrelFailCount++, then 阅读全文
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find cpu datasheet , watchdog relate registers: 0x18060008 watchdong timer control 0x1806000c watchdog timer we can read and write watchdog register u 阅读全文
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DDR工作频率 在600MHZ. include/configs/board953x.h #define CFG_PLL_FREQ CFG_PLL_650_600_200 #define CFG_DDR_REFRESH_VAL 0x4138 (default 12c) 0x0100 0001 001 阅读全文
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reference :https://github.com/lentinj/u-boot/blob/master/doc/README.autoboot how to enable protect sonsole in uboot stage ? we can add follow contest 阅读全文
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Reference :https://openwrt.org/docs/guide-developer/build-system/use-patches-with-buildsystem example: in the kernel top-level directory # quilt new p 阅读全文
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By passing the kernel panic parameter, the system automatically resets after 3 seconds when kernel panic happen example: bootargs 'board=xxxxx console 阅读全文
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以太网的地址为48位，由ieee统一分配给网卡制造商，每个网卡的地址都必须是全球唯一的。共6个字节的长度 字节 5 4 3 2 1 0 位 47。。40 39。。32 31。。24 23。。16 15。。8 7。。0 例子 08 00 09 A0 4A B1 我们需要注意的是以太网地址的第32位是组 阅读全文
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use dns-sd command simulate mdns message: dns-sd -R test _test._tcp local 1234 a=111111111111111111111111111111111111111111111111111111111111111111111 阅读全文
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Code Reason Explanation 0 Reserved Normal working operation 1 Unspecific Reason We don’t know what’s wrong 2 Previous authentication no longer valid C 阅读全文
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1 Scope of Document This document describes how to export gpio interface under gpio-export driver 2 Requiremen 2.1 Function Requirement We can pull up 阅读全文
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1 Scope of Document This document describes MINI PCIE usb hardware design, for EC20 4G module 2 Requiremen 2.1 Function Requirement Support ec20 ppp d 阅读全文
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1 Scope of Document This document describes how to support reset button under openwrt system2 Requiremen2.1 Function RequirementNA2.2 Performance Requ 阅读全文
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1 Scope of Document This document describes tf card bootup auto do file system check when mount tf card 2 Requiremen 2.1 Function Requirement Auto do 阅读全文
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1 Scope of Document This document describes how to write udev script, when enum usb device maybe produces several interfaces(/dev/ttyUSB*), if we want 阅读全文
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1 Scope of Document This document describes vlan design on nodewrt2p 2 Requiremen 2.1 Function Requirement Port0 be used for wan port, PORT1 PORT2 POR 阅读全文
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1 Scope of Document This document describes how to custom wifi option 2 Requiremen 2.1 Function Requirement Hidden wifi ssid, custom wifi ssid, custom 阅读全文