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锟斤拷锟斤拷 | 锟斤拷锟斤拷锟节匡拷 | 锟斤拷锟斤拷 | 锟斤拷锟斤拷LF
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[Photo of the Author]
by Guido Socher (homepage)

锟斤拷锟斤拷锟斤拷锟斤拷:

Guido likes Linux because it is a paradise for people who want to develop their own software and hardware.


目录:

 

Linux锟斤拷锟斤拷锟斤拷使锟斤拷USB锟斤拷LCD(锟斤拷锟斤拷锟接癸拷锟诫按钮)

[Illustration]

摘要:

锟斤拷锟斤拷锟角撅拷锟斤拷前锟斤拷写锟斤拷锟斤拷一篇硬锟斤拷锟斤拷锟铰碉拷强锟揭凤拷锟斤拷锟斤拷锟斤拷锟斤拷.LinuxFocus 锟侥讹拷锟斤拷锟斤拷暮锟斤拷锟斤拷锟�!一些锟斤拷锟斤拷要知锟斤拷锟斤拷锟斤拷锟斤拷锟経SB锟斤拷锟斤拷.锟斤拷锟斤拷锟斤拷一锟捷猴拷 锟矫的斤拷锟斤拷锟斤拷锟� .锟斤拷锟斤拷使锟斤拷2002 锟斤拷5锟铰碉拷锟斤拷锟斤拷锟斤拷锟结到锟斤拷LCD锟斤拷示锟斤拷锟斤拷锟斤拷USB使之锟斤拷锟斤拷.全锟斤拷锟借备 锟斤拷锟斤拷锟斤拷锟斤拷USB锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷.锟斤拷锟斤拷锟姐不锟斤拷要锟轿何碉拷锟斤拷拥锟皆�.

使锟矫憋拷锟斤拷锟叫碉拷实锟斤拷,锟斤拷锟斤拷要锟斤拷锟劫帮拷装锟斤拷锟街碉拷Linux AVR锟斤拷锟斤拷锟斤拷锟斤拷.锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷锟�: Programming the AVR Microcontroller with GCC. .

_________________ _________________ _________________

 

锟斤拷锟�

USB锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街达拷锟斤拷锟侥接口诧拷通锟斤拷USB锟斤拷锟斤拷直锟接革拷锟借备锟斤拷 锟斤拷.锟斤拷锟侥接匡拷锟斤拷锟缴诧拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫达拷锟斤拷.锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟脚碉拷. 缺锟斤拷锟斤拷硬锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟狡碉拷屎透锟斤拷拥锟叫拷锟斤拷锟斤拷锟斤拷锟斤拷锟�. 锟饺匡拷锟斤拷锟斤拷些说锟斤拷( http://www.usb.org/developers/, 锟斤拷锟斤拷要锟斤拷锟斤拷1.1锟侥版本锟斤拷说锟斤拷) 锟斤拷锟斤拷锟斤拷锟斤拷327页锟斤拷篇锟斤拷锟斤拷锟斤拷锟捷的伙拷涩锟窖讹拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟揭拷锟経 SB锟借备锟斤拷锟斤拷硕锟斤拷执锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷. 一锟斤拷锟斤拷锟阶讹拷锟斤拷说锟斤拷锟斤拷 http://www.beyondlogic.org/ 锟斤拷锟角伙拷锟角革拷锟斤拷.

锟斤拷锟斤拷锟斤拷呛锟�?锟斤拷锟斤拷锟斤拷伟锟斤拷锟斤拷堑锟轿拷锟斤拷锟斤拷锟�(Microcontroller)锟斤拷USB锟斤拷 锟斤拷锟斤拷锟斤拷?FTDI,一锟斤拷锟秸革拷锟斤拷锟侥癸拷司,锟斤拷锟剿斤拷锟斤拷陌旆�( http://www.ftdichip.com). 锟斤拷锟斤拷锟结供锟斤拷一锟斤拷实锟斤拷USB锟斤拷锟斤拷锟斤拷芯片.FT232BM芯片一锟斤拷锟斤拷RS232, 锟斤拷一锟斤拷锟斤拷USB.锟斤拷一锟戒话说,锟斤拷只锟角斤拷原锟斤拷锟斤拷要锟斤拷拥锟皆达拷锟組A X232转锟斤拷锟斤拷锟剿达拷RS232转锟斤拷锟竭碉拷FT232BM芯片.  

锟斤拷锟斤拷锟斤拷锟斤拷

FT232BM锟斤拷锟斤拷锟斤拷锟侥匡拷平台锟侥斤拷锟斤拷锟斤拷锟�.锟斤拷锟绞合革拷锟街诧拷锟斤拷系统锟侥版本, 为Linux锟节猴拷准锟斤拷锟斤拷锟斤拷ftdi_sio锟斤拷锟斤拷源锟斤拷锟诫开锟斤拷.锟斤拷锟斤拷Linux锟节核碉拷一锟斤拷 锟斤拷.FT232BM锟斤拷锟斤拷锟结供锟斤拷USB锟斤拷RS232锟斤拷锟斤拷锟斤拷.锟斤拷锟斤拷Linux锟铰碉拷锟节猴拷模 锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫的猴拷锟斤拷锟斤拷锟斤拷.USB锟斤拷RS232锟侥诧拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷,锟斤拷锟斤拷锟斤拷锟矫碉拷锟角憋拷准锟斤拷Red Hat 7.3锟斤拷锟斤拷诤锟�(2.4.18), 没锟叫撅拷锟斤拷锟轿猴拷锟斤拷锟铰憋拷锟斤拷锟斤拷薷锟�.只锟角简单地帮拷锟斤拷锟斤拷锟剿斤拷去...

ftdi_sio 锟斤拷http://ftdi-usb-sio.sourceforge.net/锟斤拷锟斤拷.

锟揭碉拷Red Hat 7.3锟斤拷锟斤拷锟揭诧拷锟斤拷USB锟借备锟斤拷时锟斤拷锟皆讹拷锟侥硷拷锟斤拷锟斤拷锟叫碉拷 锟节猴拷模锟斤拷.锟斤拷锟斤拷锟斤拷锟绞癸拷玫姆锟斤拷邪锟斤拷锟斤拷薹锟斤拷锟斤拷锟�,锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷些 模锟斤拷:(锟斤拷锟経SB-UHCI)

/sbin/lsmod usb-uhci
/sbin/lsmod usbcore
/sbin/lsmod usbserial
/sbin/lsmod ftdi_sio

The device file to communicate with the hardware is /dev/ttyUSB0

ftdio_sio锟侥匡拷锟斤拷锟竭斤拷锟斤拷锟斤拷锟斤拷使锟斤拷2.4.20锟斤拷锟斤拷诤锟�,锟斤拷锟斤拷 锟斤拷锟皆匡拷锟斤拷锟斤拷2.4.18也锟斤拷锟皆癸拷锟斤拷(锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷 些锟斤拷锟斤拷锟斤拷锟皆碉拷)  

锟斤拷路图

锟斤拷前锟斤拷锟斤拷锟角碉拷路.锟斤拷只锟角斤拷FT232BM锟斤拷锟诫到微锟斤拷锟斤拷锟斤拷(Microcontroller) 锟斤拷USB 锟斤拷锟斤拷锟斤拷锟叫硷拷锟絉x/Tx锟斤拷之锟斤拷.锟斤拷锟斤拷要一锟斤拷6MHz锟侥撅拷锟斤拷觳拷锟� 锟斤拷锟斤拷锟斤拷锟斤拷一些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷牟锟斤拷锟�.锟斤拷锟斤拷微锟斤拷状锟斤拷(ferrite bead) (锟节碉拷路图锟斤拷锟揭诧拷)锟斤拷一锟斤拷小小锟斤拷锟斤拷锟斤拷去锟斤拷频锟脚号碉拷锟斤拷圈(USB锟斤拷锟斤拷要 锟斤拷48MHz锟斤拷锟斤拷锟斤拷),锟姐还锟斤拷锟皆帮拷一锟斤拷1k锟侥碉拷锟斤拷锟斤拷锟�10圈锟侥碉拷细锟斤拷锟斤拷,锟斤拷 锟斤拷锟斤拷为一锟斤拷同锟斤拷锟斤拷锟斤拷圈锟斤拷使锟斤拷.


schematic
一锟斤拷锟斤拷要注锟斤拷锟斤拷锟斤拷锟斤拷堑锟斤拷锟斤拷锟斤拷锟斤拷锟�,锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟竭癸拷锟斤拷锟斤拷锟� 锟斤拷,锟斤拷锟斤拷锟斤拷锟斤拷小锟斤拷100mA.锟斤拷锟斤拷璞革拷锟斤拷锟斤拷锟街э拷锟経SB锟斤拷锟斤拷模式(Suspend). 锟斤拷一锟斤拷"sleep"锟斤拷锟斤拷位锟节低碉拷位时,锟借备锟侥耗碉拷锟斤拷锟斤拷锟斤拷小锟斤拷0.5mA.锟斤拷一 锟斤拷要锟斤拷使锟斤拷票锟矫革拷锟接碉拷锟斤拷锟斤拷.AVR支锟斤拷一锟斤拷"Idle"模式锟斤拷(锟侥碉拷锟斤拷锟斤拷 2mA)锟斤拷"Power down"模式(锟侥碉拷锟斤拷锟斤拷20uA).锟斤拷锟斤拷锟斤拷锟斤拷微锟斤拷锟斤拷锟斤拷锟斤拷idle 模式锟斤拷锟窖伙拷锟角猴拷锟斤拷锟阶碉拷.锟斤拷然锟斤拷锟轿ワ拷锟揭伙拷锟経SB锟侥憋拷准,锟揭伙拷锟角撅拷锟斤拷 使锟斤拷idle模式.锟斤拷示锟斤拷锟较的憋拷锟斤拷锟狡达拷时锟斤拷乇眨锟斤拷锟斤拷锟斤拷锟铰凤拷暮牡锟斤拷锟斤拷锟� 为3mA.锟斤拷锟�0.5mA要锟襟。碉拷USB锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟杰硷拷锟斤拷锟斤拷锟斤拷 锟斤拷应锟矫伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

说锟斤拷锟斤拷么锟洁，锟揭憋拷锟斤拷锟斤拷锟斤拷锟矫伙拷锟街э拷止锟斤拷锟侥碉拷锟皆ｏ拷锟斤拷锟斤拷锟揭诧拷锟杰诧拷 锟斤拷锟斤拷锟斤拷锟斤拷帧锟斤拷锟斤拷锟斤拷锟叫碉拷锟皆ｏ拷锟斤拷锟斤拷锟斤拷执锟斤拷锟斤拷锟较ワ拷锟绞斤拷锟斤拷裕锟斤拷锟斤拷锟� 锟斤拷锟斤拷一锟铰ｏ拷锟斤拷锟窖斤拷锟斤拷锟斤拷锟斤拷摇锟�

锟斤拷路锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷2002锟斤拷锟� 5锟斤拷锟斤拷一篇锟斤拷锟斤拷锟斤拷锟结到锟斤拷锟斤拷. 锟斤拷锟斤拷锟皆对达拷锟揭就诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
通锟斤拷锟斤拷锟酵硷拷锟斤拷锟斤拷锟斤拷钥锟斤拷锟斤拷糯锟斤拷说锟酵硷拷锟斤拷锟斤拷械锟斤拷募锟斤拷锟斤拷汛锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰碉拷末尾锟斤拷锟截★拷
board
锟斤拷锟角碉拷锟斤拷模锟斤拷锟斤拷锟斤拷蚀锟教层，锟斤拷色锟侥撅拷锟角碉拷锟竭★拷

锟斤拷锟斤拷要锟斤拷USB B锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷示锟斤拷
type B Receptacle

 

锟斤拷SMD芯片锟斤拷锟斤拷

SMD芯片锟叫很好的伙拷械锟斤拷锟斤拷锟斤拷锟斤拷埽锟斤拷锟斤拷缘锟斤拷影锟斤拷锟斤拷锟斤拷锟剿� 却锟斤拷一锟斤拷噩锟轿★拷锟斤拷锟斤拷要锟杰高的猴拷锟接硷拷锟缴ｏ拷锟斤拷锟劫帮拷锟较碉拷SMD 芯片锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭干撅拷锟斤拷锟斤拷锟角筹拷学锟斤拷锟斤拷锟斤拷锟竭憋拷 锟侥★拷锟斤拷锟斤拷锟矫伙拷邪锟斤拷锟斤拷锟绞达拷痰锟铰凤拷澹拷锟斤拷锟叫酒拷锟斤拷锟斤拷锟斤拷锟斤拷锟� 锟斤拷选锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷帧锟�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之前锟斤拷锟斤拷SMD芯片锟斤拷锟接碉拷锟斤拷路锟斤拷锟斤拷.
锟斤拷弄一锟姐焊锟斤拷锟节碉拷锟斤拷锟较ｏ拷然锟斤拷锟斤拷SMD芯片锟斤拷锟斤拷锟斤拷锟斤拷粘锟斤拷一锟斤拷 锟斤拷锟斤拷锟洁（一些锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟桔讹拷锟斤拷锟斤拷为锟斤拷锟斤拷锟桔ｏ拷锟斤拷一锟揭斤拷 锟斤拷"Kontakt锟斤拷学"锟侥德癸拷锟斤拷司锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟阶达拷锟�"Lötlack" 锟斤拷锟斤拷 锟斤拷锟斤拷锟绞癸拷锟斤拷锟饺ワ拷锟斤拷婧革拷锟斤拷邸锟�

锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟芥不锟斤拷锟斤拷锟斤拷魏蔚暮锟斤拷锟斤拷锟斤拷拢锟饺伙拷锟阶� 确锟侥凤拷锟斤拷FT232BM锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖挂伙拷锟矫匡拷锟斤拷锟脚★拷锟斤拷要 锟斤拷锟斤拷锟接猴拷锟斤拷锟剿★拷ft232SMD

锟斤拷锟斤拷一锟斤拷锟侥伙拷锟斤拷锟斤拷锟斤拷锟斤拷秃芎锟斤拷恕锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷小锟脚碉拷锟斤拷锟斤拷也没 锟叫讹拷锟侥癸拷系锟斤拷只要锟斤拷一锟斤拷锟绞合碉拷锟斤拷确锟斤拷锟节接达拷锟斤拷锟斤拷前锟角干撅拷锟侥★拷 锟揭诧拷锟斤拷锟斤拷使锟矫筹拷锟斤拷锟芥烤锟斤拷锟斤拷锟斤拷锟斤拷野锟斤拷锟侥凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥凤拷锟斤拷锟杰匡拷 锟杰伙拷锟斤拷芯片锟侥★拷  

锟斤拷锟斤拷

锟揭斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷源说锟铰凤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拥锟紸VR微锟斤拷锟斤拷锟斤拷锟侥诧拷锟斤拷锟较★拷 linux锟斤拷锟较筹拷FTDI芯片锟斤拷锟斤拷应锟矫匡拷锟斤拷锟斤拷/proc/bus/usb/device锟叫匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷ｏ拷

T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0403 ProdID=6001 Rev= 2.00
S: Manufacturer=FTDI
S: Product=USB <-> Serial
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 90mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=serial
E: Ad=81(I) Atr=02(Bulk) MxPS= 64 Ivl= 0ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl= 0ms

之锟斤拷锟斤拷锟紸VR微锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷一锟斤拷锟斤拷使LED锟斤拷锟斤拷烁锟侥筹拷锟斤拷 锟解开linuxusblcd锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰碉拷末尾锟斤拷锟斤拷锟截ｏ拷锟斤拷锟斤拷锟诫：

make testload0

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟経SB转锟斤拷锟斤拷锟斤拷应锟矫诧拷锟较★拷
锟斤拷锟斤拷锟斤拷猿晒锟斤拷锟矫达拷锟斤拷锟皆肯讹拷微锟斤拷锟斤拷锟斤拷锟酵匡拷锟皆癸拷锟斤拷锟剿★拷

之锟斤拷锟斤拷涂锟斤拷园锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷氐锟轿拷锟斤拷锟斤拷锟斤拷校锟�

make load

锟斤拷锟斤拷锟斤拷涂锟斤拷锟绞癸拷锟�"ttydevinit /dev/ttyUSB0" 锟斤拷锟斤拷始锟斤拷USB锟斤拷锟斤拷锟斤拷锟接ｏ拷 锟斤拷锟斤拷锟斤拷"cat>/dev/ttyUSB0"锟斤拷锟斤拷锟借备锟皆伙拷锟斤拷

ttydevinit /dev/ttyUSB0
cat > /dev/ttyUSB0
D=hello world

锟解将锟斤拷示"Hello world"锟斤拷锟斤拷示锟斤拷锟较★拷锟斤拷细锟斤拷锟斤拷锟捷硷拷2002锟斤拷5锟斤拷 锟脚碉拷锟斤拷锟铰★拷锟斤拷篇锟斤拷锟斤拷锟斤拷锟结到一锟斤拷锟斤拷llp.pl锟侥筹拷锟津，撅拷锟斤拷通锟斤拷LC D锟斤拷示锟斤拷锟较碉拷锟斤拷锟斤拷锟斤拷钮锟皆斤拷锟斤拷式锟侥凤拷式锟斤拷锟斤拷锟斤拷锟皆伙拷锟侥癸拷锟杰★拷 锟斤拷锟斤拷锟斤拷也锟斤拷使锟斤拷锟斤拷锟角★拷

锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷锟侥达拷锟斤拷时锟斤拷锟斤拷钮锟斤拷没锟斤拷锟斤拷锟斤拷去锟斤拷FT232BM锟节帮拷锟斤拷锟斤拷妫�:
usb lcd
 

锟缴癸拷选锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷然锟斤拷锟斤拷牡锟铰凤拷芗虻ィ锟斤拷锟斤拷猿锟窖э拷锟斤拷锟剿碉拷锟斤拷锟斤拷诒锟斤拷锟竭憋拷锟斤拷 SMD芯片锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷实锟街★拷锟斤拷锟斤拷锟矫伙拷邪锟斤拷眨锟斤拷锟斤拷锟揭伙拷锟斤拷锟� 业锟斤拷锟侥筹拷品锟斤拷缺锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷玫锟斤拷锟斤拷锟接癸拷锟斤拷LED锟酵帮拷钮锟斤拷 锟斤拷锟斤拷锟斤拷璞革拷锟斤拷锟街伙拷玫锟絃CD锟斤拷示锟斤拷锟斤拷锟斤拷些锟侥价革拷也锟杰猴拷锟斤拷锟斤拷 锟斤拷LCD锟斤拷锟借备只锟斤拷30欧元锟斤拷

锟斤拷锟揭碉拷锟角ｏ拷锟襟部分碉拷锟斤拷业锟斤拷品锟斤拷锟斤拷锟斤拷锟斤拷锟教碉拷锟斤拷锟叫号ｏ拷锟斤拷锟斤拷锟角伙拷锟斤拷ftdi芯片锟侥诧拷品锟斤拷 锟斤拷锟斤拷锟侥伙拷锟节核诧拷锟斤拷识锟斤拷锟斤拷锟斤拷,锟斤拷为USB锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷.锟斤拷锟斤拷要锟睫革拷锟节核ｏ拷 锟斤拷锟铰憋拷锟诫。锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷丫锟斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟斤拷耄诧拷锟斤拷锟斤拷锟斤拷陌姹撅拷锟街э拷锟斤拷碌锟叫酒拷恕锟�
 

锟轿匡拷锟斤拷锟阶ｏ拷

 

锟斤拷锟斤拷篇锟斤拷锟铰凤拷锟斤拷锟斤拷锟斤拷

每篇锟斤拷锟铰讹拷锟叫革拷锟皆的凤拷锟斤拷页锟芥。锟斤拷锟斤拷锟揭筹拷锟斤拷铮拷锟斤拷锟斤拷锟斤拷峤伙拷锟斤拷郏锟揭诧拷锟斤拷圆榭达拷锟斤拷锟斤拷锟斤拷叩锟斤拷锟斤拷郏锟�
 锟斤拷锟斤拷页锟斤拷 

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