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About Protocol
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About Protocol
Created
2021-09-04
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Updated
2021-09-04
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常见的协议和不常见的协议
AOA协议android上，谷歌定义的协议
Xmodem协议,基于UART的文件传输协议
NFS协议
RPC协议
HTTP协议
Author:
wang shaodong
Link:
http://linuxmint17.github.io/2021/09/04/about-protocol/
Copyright Notice:
All articles on this blog are licensed under
CC BY-NC-SA 4.0
unless otherwise stated.
Previous
about embed software
busybox Swiss Knife for embed, include a lot of linux cmd (include, vi ,sed, awk, etc) mbedtls The Mbed TLS library is designed to integrate with existing (embedded) applications and to provide the building blocks for secure communication, cryptography and key management learn it @ https://tls.mbed.org/kb/how-to/mbedtls-tutorial 主要用于arm, is for substituting openssl dropbear is a ssh server for embed use musl libc light weight libc for embed environment uCore libc light weight l...
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about bus
总线, 计算机的组成部件间用于传输数据或者指令的物理（软件逻辑）线路，以下列举一些嵌入式中常见的总线和其他总线 MIPIHDMISPI 标准的SPI总线是有CS（chip select)/SS(slave select), CLOCK, MISO(Master IN Slave out), MOSI 四条线，用于nor flash的扩展的SPI额外多了两条引脚 WP（write protect）,HOLD(用于禁止主机和flash器件的所有通讯) 常见的1-wire(只用一条数据线，bitbang,只能单工), 2-wire（可以双工）, 4-wire(使用WP和HOLD脚作为额外的两条数据线) 都是说用来传输数据的线的数量 标准的是2-wire, 1-wire 为了节约引脚，4-wire为了提升速率 SPI通信的开始总是以CS引脚电平拉低开始，拉高而结束 SPI clock的极性（ploar）和相位(phase) 各有0，1两种排列组合出来共有4种，所以spi有4种工作模式 四种模式的差异在于读取数据的时机是在第一个还是第二个跳变沿，是上升沿还...
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常见的协议和不常见的协议
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