STM32 初级课程-以太网基础介绍1life. augmented
Device
Switch
Device B
Device c
Device a
Device b
Device o
life. augmented
Start of frame
Destination
MAC Address
Checksum
TCP-IP
Source
Stack data
MAC Address
life. augmented
3 bytes
3 btes
Organizationally Uniq
STM32 初级课程-TCP-IP协议讲座5Allows the client(a browser,.)to get resources(html pages
pictures, ..)from a server
Get(reqUest)htTp
wwWst.com/stm32
dget(respOnsE)hTtp
STM32(CORTEX M3)-32-bit Microcontrollers
τcP1
buh时mm
eminar
IP
t80
Web server s IP
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STM32 初级课程-TCP-IP协议讲座4life. augmented
life. augmented
simplified sender, assuming
one way data transfer
no flow, congestion control
wait
event
life. augmented
life. augmented
Host a
Host b
User
types
C
Seq=42, ACK=79, data='c host ACKs
receipt of
STM32 初级课程-TCP-IP协议讲座3life. augmented
I want to
IP‖| ransport layer
Ethernet
send data to
MAC Address127.127.127.127
TCP
UDP
IP n\ I want to
UDP
send a datagram
Internet layer
IP Address on the port#
IP
I Want to
工P‖
TCP
send data in
IP address a re
STM32 初级课程-TCP-IP协议讲座2Internet Protocol 3
IP characteristic
IP header
°| P Router
IP Packets Fragments
life. augmented
IP Characteristic
Best Effort Delivery(unreliable, connectionless
4
Packets can be lost
IP
Packets can be duplicated
Packets can b
