[LinuxFocus-icon]
<--  | 站锟斤拷锟酵�  | 锟斤拷锟斤拷  | 锟斤拷锟斤拷
锟斤拷锟斤拷 | 锟斤拷锟斤拷锟节匡拷 | 锟斤拷锟斤拷 | 锟斤拷锟斤拷LF
This document is available in: English  ChineseGB  Deutsch  Francais  

[Photo of the Author]
by Guido Socher (homepage)

锟斤拷锟斤拷锟斤拷锟斤拷:

Guido喜锟斤拷Linux锟斤拷锟斤拷为锟斤拷锟节匡拷锟斤拷锟皆硷拷锟斤拷硬锟斤拷锟斤拷说Linux确实锟斤拷一锟斤拷锟角筹拷锟矫碉拷系统锟斤拷


目录:

 

锟节讹拷锟斤拷锟斤拷 锟斤拷锟斤拷 一锟斤拷锟斤拷锟斤拷锟铰度计伙拷锟斤拷锟斤拷atmel微锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷I2C通锟斤拷

[Illustration]

摘要:

锟节第讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟角斤拷锟斤拷锟斤拷一锟斤拷液锟斤拷锟斤拷示锟斤拷锟斤拷LCD锟斤拷锟斤拷锟斤拷锟斤拷锟揭斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷摹锟�

锟斤拷一锟轿讹拷锟斤拷一系锟斤拷锟斤拷锟铰的讹拷锟斤拷锟斤拷锟斤拷锟侥讹拷 锟斤拷一锟斤拷锟斤拷(February2005 article365).

_________________ _________________ _________________

 

锟铰讹拷锟斤拷

锟斤拷 锟斤拷一篇锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟窖撅拷锟斤拷锟斤拷锟斤拷锟剿大部分碉拷硬锟斤拷锟斤拷锟铰度计碉拷锟斤拷要锟斤拷锟杰诧拷锟街ｏ拷也锟斤拷锟斤拷锟剿碉拷Linux PC 锟斤拷锟斤拷锟捷达拷锟戒。锟斤拷锟斤拷一篇锟斤拷锟斤拷锟角斤拷锟斤拷锟斤拷一锟斤拷液锟斤拷锟斤拷示锟斤拷锟斤拷一锟斤拷锟角筹拷锟津单碉拷gtk GUI锟斤拷锟芥。

锟斤拷锟斤拷锟筋工锟斤拷锟斤拷锟斤拷锟斤拷锟阶★拷锟斤拷锟斤拷锟斤拷锟铰碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭斤拷锟斤拷锟斤拷一锟斤拷I2C锟斤拷锟斤拷锟斤拷模锟斤拷转锟斤拷锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷摹锟�  

液锟斤拷锟斤拷示锟斤拷

锟斤拷锟斤拷使锟斤拷一锟斤拷HD44780锟斤拷锟斤拷LCD锟斤拷示锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷使锟矫癸拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷愿锟斤拷锟斤拷欠锟斤拷锟紸SCII锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷示锟斤拷锟斤拷微锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟绞癸拷谩锟�
HD44780 compatible LCD display

锟斤拷锟斤拷锟斤拷锟斤拷一系锟叫碉拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟� shop.tuxgraphics.org锟斤拷锟揭碉拷锟斤拷锟斤拷LCD 锟斤拷锟节碉拷锟斤拷锟斤拷元锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷同锟斤拷锟斤拷锟斤拷锟斤拷锟诫。 实锟斤拷LCD锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷lcd.c锟斤拷lcd.h锟斤拷lcd_hw.h锟斤拷 锟斤拷锟角凤拷锟斤拷一锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷诒锟斤拷牡锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷锟截★拷 锟斤拷些锟斤拷锟斤拷慕涌诘锟饺凤拷浅锟斤拷锟斤拷锟绞癸拷茫锟� 
// call this once:
// initialize LCD display, cursor off
lcd_init(LCD_DISP_ON);

// to write some text we first clear
// the display:
lcd_clrscr();
lcd_puts("Hello");
// go to the second line:
lcd_gotoxy(0,1);
lcd_puts("LCD");
the linuxfocus September2002 article "Understanding HD44780 compatible LCD-displays" 锟叫斤拷锟斤拷锟斤拷HD44780锟斤拷示锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷摹锟�

锟斤拷锟角碉拷锟斤拷锟斤拷锟斤拷16x2锟斤拷20x2锟斤拷LCD锟较讹拷锟杰癸拷锟斤拷锟斤拷

board change 锟斤拷锟斤拷锟斤拷锟角对碉拷路图锟斤拷锟斤拷锟斤拷一些锟斤拷锟铰★拷锟揭凤拷锟斤拷锟斤拷一些LCD锟斤拷锟斤拷锟斤拷锟侥比斤拷锟斤拷锟斤拷锟叫革拷锟竭的碉拷锟捷革拷锟截和革拷锟酵的碉拷锟借。 锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷懈锟斤拷玫锟紼SD锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷LCD锟斤拷示锟斤拷锟斤拷锟接碉拷SCK锟斤拷MOSI锟斤拷锟绞憋拷锟� 锟斤拷一锟斤拷锟斤拷母锟斤拷锟斤拷锟斤拷诓锟斤拷锟铰凤拷锟斤拷锟叫匡拷锟杰伙拷锟斤拷锟斤拷锟斤拷锟诫。

锟斤拷一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絃CD锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿讹拷锟斤拷牡锟斤拷琛� 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斤拷锟斤拷锟斤拷锟斤拷锟剿ｏ拷锟斤拷锟斤拷锟角笔记憋拷锟斤拷锟斤拷锟矫伙拷锟斤拷然锟斤拷锟斤拷锟斤拷锟解。

为锟剿筹拷锟阶憋拷锟斤拷锟斤拷一锟斤拷锟斤拷锟揭革拷锟斤拷锟剿碉拷路图锟斤拷锟斤拷锟节帮拷LCD锟斤拷示锟斤拷锟斤拷D7锟斤拷RS锟斤拷锟斤拷锟接碉拷锟斤拷PD7锟斤拷PD6锟较★拷 锟斤拷使锟斤拷锟窖撅拷锟斤拷锟矫碉拷路锟藉，锟斤拷锟斤拷些锟侥憋拷也锟斤拷锟斤拷锟斤拷什么锟斤拷锟斤拷摹锟� 锟斤拷只要锟节帮拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟竭诧拷锟斤拷锟斤拷PB3锟斤拷锟斤拷锟斤拷锟斤拷小锟斤拷锟叫断就匡拷锟斤拷锟剿★拷

Circuit diagram

 

一锟斤拷小锟斤拷GUI锟斤拷锟斤拷

为锟剿凤拷锟斤拷喜锟斤拷锟斤拷锟斤拷系统锟斤拷GUI锟斤拷锟斤拷锟斤拷没锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷浅锟斤拷虻サ锟紾UI锟斤拷 锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷签锟斤拷桑锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞緄2ctemp_linux锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷叩锟斤拷锟斤拷 锟斤拷i2ctemp_linux锟斤拷通锟斤拷I2C锟斤拷锟竭从碉拷路锟较讹拷取锟铰度碉拷锟斤拷锟筋）锟斤拷
GUI

锟斤拷锟斤拷锟斤拷锟角撅拷锟斤拷锟斤拷一锟斤拷锟角筹拷锟斤拷锟斤拷露燃锟斤拷恕锟斤拷锟斤拷锟斤拷锟斤拷锟揭恍╋拷锟斤拷埽锟� 锟斤拷锟斤拷锟揭斤拷锟节憋拷锟斤拷剩锟铰的诧拷锟街斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷一些锟斤拷锟斤拷锟斤拷  

模锟斤拷转锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷锟�

Atmega8支锟斤拷锟斤拷锟斤拷模式锟斤拷一锟斤拷模式锟斤拷锟斤拷锟斤拷远锟斤拷锟斤拷模锟斤拷锟脚号诧拷锟斤拷锟节诧拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷一锟斤拷锟叫断★拷 应锟矫筹拷锟斤拷锟斤拷锟斤拷锟酵匡拷锟斤拷锟斤拷锟叫断凤拷锟斤拷时锟斤拷锟劫地斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拇锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷小锟�

锟斤拷一锟斤拷模式锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷模式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟阶拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥Ｊ斤拷俣群芸臁� 锟斤拷锟斤拷锟侥达拷锟斤拷锟斤拷锟斤拷锟节讹拷锟斤拷前锟侥斤拷锟斤拷时锟戒，锟斤拷锟斤拷然锟斤拷锟皆伙拷锟矫匡拷锟�100锟轿碉拷转锟斤拷锟劫度★拷 锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷愎伙拷恕锟斤拷锟斤拷锟斤拷锟斤拷遣锟斤拷锟斤拷锟斤拷锟侥Ｊ斤拷锟�

锟斤拷锟斤拷锟角碉拷Atmega8锟斤拷锟斤拷锟角匡拷锟斤拷使锟斤拷模锟斤拷锟斤拷锟斤拷锟紸DC0锟斤拷ADC3锟斤拷 锟斤拷锟斤拷之锟解还锟斤拷AGND锟斤拷模锟斤拷兀锟斤拷锟斤拷拥锟斤拷锟酵拷兀锟斤拷锟紸REF锟斤拷锟轿匡拷锟斤拷压锟斤拷锟斤拷AVCC锟斤拷锟斤拷锟斤拷+5V锟斤拷锟斤拷

锟斤拷模锟斤拷转锟斤拷锟斤拷锟斤拷锟斤拷模锟斤拷锟脚猴拷锟斤拷AREF锟斤拷冉稀锟斤拷锟紸REF锟斤拷鹊锟侥ｏ拷锟斤拷藕锟斤拷嗟憋拷锟斤拷锟斤拷锟街�1023锟斤拷 AREF锟斤拷锟斤拷锟斤拷锟轿猴拷锟解部0-5V之锟斤拷牟慰锟斤拷锟窖癸拷锟斤拷锟斤拷锟斤拷使锟斤拷锟解部锟轿匡拷锟斤拷压锟斤拷 锟斤拷也锟斤拷锟斤拷通锟斤拷使锟斤拷一锟斤拷锟节诧拷锟轿匡拷锟斤拷压锟斤拷2.56V锟斤拷锟斤拷AVCC锟斤拷锟斤拷锟斤拷确锟斤拷转锟斤拷锟斤拷 锟斤拷锟斤拷使锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷ADMUX锟侥达拷锟斤拷锟斤拷REFS0锟斤拷REFS1锟斤拷锟斤拷锟斤拷锟侥★拷

模锟斤拷转锟斤拷锟斤拷一锟轿匡拷锟斤拷转锟斤拷ADC0锟斤拷ADC3锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷摺锟� 锟斤拷锟斤拷转锟斤拷之前锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟紸DMUX锟侥达拷锟斤拷锟侥憋拷志位锟斤拷通知芯片使锟斤拷锟斤拷一锟斤拷通锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷一锟斤拷锟津单碉拷模锟斤拷转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樱锟� 
volatile static int analog_result;
volatile static unsigned char analog_busy;

analog_busy=1; // busy mark the ADC function
channel=0; // measure ADC0
// use internal 2.56V ref
outp((1<<REFS1)|(1<<REFS0)|(channel & 0x07),ADMUX);
outp((1<<ADEN)|(1<<ADIE)|(1<<ADIF)|(1<<ADPS2),ADCSR);
sbi(ADCSR,ADSC); // start conversion
锟斤拷锟斤拷微锟斤拷锟斤拷锟斤拷锟酵斤拷锟斤拷锟斤拷模锟斤拷转锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷准锟斤拷锟矫ｏ拷锟斤拷锟酵伙拷锟斤拷锟絊IGNAL(SIG_ADC)锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟角匡拷锟皆斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟揭恍╋拷锟斤拷锟斤拷锟斤拷锟侥ｏ拷狻霸拷锟斤拷浴锟斤拷锟斤拷锟� 锟斤拷为一锟斤拷锟斤拷锟斤拷员锟斤拷锟斤拷锟斤拷锟斤拷燃锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷牡锟�8位锟斤拷锟捷★拷 
SIGNAL(SIG_ADC) {
        unsigned char adlow,adhigh;
        adlow=inp(ADCL); /* read low first, two lines. Do not combine
                          the two lines into one C statement */
        adhigh=inp(ADCH);
        analog_result=(adhigh<<8)|(adlow & 0xFF);
        analog_busy=0;
}
锟斤拷锟斤拷之锟斤拷锟斤拷锟角就匡拷锟皆达拷analog_result锟斤拷锟斤拷锟叫伙拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷玫锟侥ｏ拷锟阶拷锟斤拷慕锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诔锟斤拷锟斤拷锟斤拷锟斤拷锟轿何地凤拷使锟矫★拷锟角筹拷锟斤拷锟斤拷使锟矫★拷

锟斤拷锟斤拷锟斤拷锟叫碉拷锟叫断讹拷锟斤拷要锟斤拷锟斤拷sei();锟斤拷锟斤拷锟斤拷为锟斤拷全锟街可硷拷锟斤拷锟斤拷应锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥筹拷锟斤拷胤锟绞碉拷锟� 锟斤拷锟斤拷锟斤拷没锟叫筹拷锟斤拷锟斤拷

锟揭简单斤拷锟斤拷一锟斤拷一些锟斤拷锟斤拷位锟酵憋拷志位锟斤拷 Atmega8锟叫硷拷锟街匡拷选锟侥参匡拷锟斤拷压锟斤拷锟轿匡拷锟斤拷压锟斤拷锟斤拷锟斤拷锟角碉拷模锟斤拷锟斤拷锟斤拷锟窖癸拷锟饺较★拷 锟斤拷锟洁当锟斤拷锟斤拷锟街碉拷压值1023锟斤拷
REFS0=0, REFS1=0使锟斤拷锟解部锟斤拷AREF锟斤拷锟节诧拷Vref锟斤拷锟截憋拷
REFS0=0, REFS1=1使锟斤拷AVCC锟斤拷AREF锟斤拷锟斤拷峡锟窖★拷锟斤拷獠匡拷锟斤拷锟�
REFS0=1, REFS1=1使锟斤拷锟节诧拷2.56V锟轿匡拷锟斤拷压锟斤拷AREF锟较匡拷选锟斤拷锟解部锟斤拷锟斤拷
AREF锟斤拷一锟斤拷锟斤拷选锟侥碉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斤拷锟饺讹拷AREF锟斤拷压锟斤拷

 

锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷模锟絀2C通锟脚ｏ拷Atmega8锟斤拷锟斤拷

锟斤拷锟窖撅拷锟节碉拷一锟斤拷锟斤拷 (February2005 article365) 锟斤拷锟斤拷锟斤拷I2C协锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷摹锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷帧锟紸tmega8锟叫讹拷I2C通锟脚碉拷硬锟斤拷支锟街★拷 锟斤拷锟斤拷锟斤拷没锟叫憋拷要锟斤拷锟斤拷锟斤拷去实锟斤拷锟斤拷一协锟介。锟斤拷只锟斤拷要实锟斤拷一锟斤拷状态锟斤拷锟斤拷 锟斤拷一状态锟斤拷锟斤拷锟皆革拷锟斤拷Atmega8锟斤拷一锟斤拷要锟斤拷什么锟斤拷锟诫看锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷樱锟�

锟斤拷Atmega8锟秸碉拷一锟斤拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟斤拷)锟斤拷址锟斤拷I2C锟斤拷时锟斤拷锟斤拷锟酵伙拷使锟斤拷状态锟斤拷0x60 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰硷拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷状态锟诫）锟斤拷锟斤拷锟斤拷SIGNAL锟斤拷SIG_2WIRE_SERIAL)锟斤拷锟斤拷锟斤拷

--> 锟斤拷锟斤拷锟斤拷锟角憋拷锟斤拷通锟斤拷锟斤拷锟矫硷拷锟斤拷锟侥达拷锟斤拷锟斤拷锟斤拷锟斤拷Atmega8锟斤拷一锟斤拷要锟斤拷什么锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷锟角撅拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷帮拷锟斤拷锟斤拷锟斤拷证实锟脚号★拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷憋拷锟斤拷锟斤拷锟皆猴拷锟斤拷锟角就会被锟斤拷状态锟斤拷0x80锟斤拷锟矫★拷

--> 然锟斤拷锟斤拷锟角就匡拷锟皆讹拷取锟斤拷锟斤拷锟街节诧拷锟揭革拷锟斤拷Atmega8锟斤拷锟斤拷锟揭伙拷锟斤拷纸诘锟斤拷锟斤拷莸锟斤拷锟绞憋拷锟斤拷锟斤拷锟斤拷锟街な碉拷藕拧锟�

通锟脚斤拷锟斤拷时锟斤拷锟角伙拷玫锟阶刺拷锟�0xA0锟斤拷停止锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟角就匡拷锟斤拷通知锟斤拷锟角碉拷应锟矫筹拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷息锟窖撅拷锟秸碉拷锟剿★拷

I2C锟斤拷模式全锟斤拷锟斤拷状态锟斤拷锟斤拷锟斤拷锟叫匡拷锟杰碉拷状态值锟斤拷Atmega8锟街册（ 锟斤拷锟斤拷锟侥猴拷锟斤拷牟慰锟斤拷锟斤拷锟斤拷锟�183页锟斤拷锟斤拷锟捷憋拷锟斤拷锟斤拷锟斤拷细锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷锟斤拷疲锟斤拷锟揭伙拷锟斤拷锟斤拷锟缴★拷  

锟斤拷锟斤拷锟斤拷喂锟斤拷锟斤拷模锟絀2C通锟脚ｏ拷Linux锟斤拷

i2c input stage 锟斤拷锟斤拷说一锟斤拷硬锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷使锟斤拷锟斤拷I2C锟斤拷锟竭ｏ拷锟斤拷锟斤拷锟角斤拷锟斤拷通锟斤拷锟斤拷锟斤拷使锟斤拷一锟斤拷锟斤拷锟借备锟斤拷锟斤拷锟借备锟斤拷Linux PC锟斤拷 锟斤拷牡愕斤拷锟斤拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷然锟斤拷锟借备要锟斤拷锟斤拷锟斤拷锟较的碉拷压锟斤拷锟斤拷只要锟斤拷锟斤拷锟斤拷锟节碉拷锟铰讹拷路锟斤拷 锟斤拷锟角就匡拷锟皆斤拷约一锟斤拷锟斤拷锟斤拷锟斤拷锟借。锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷只锟斤拷锟斤拷锟较斤拷锟斤拷一锟斤拷4.7K锟侥碉拷锟借。

锟斤拷平值锟斤拷锟斤拷锟斤拷凇锟斤拷锟斤拷锟斤拷使锟斤拷一锟斤拷锟斤拷压锟斤拷锟斤拷锟杰斤拷锟斤拷锟斤拷压锟斤拷锟狡碉拷-0.7V锟斤拷 锟斤拷锟斤拷锟斤拷锟斤拷压锟斤拷锟狡碉拷锟斤拷锟�+5.1锟斤拷锟斤拷

锟节讹拷Atmega8锟斤拷锟节诧拷锟斤拷锟剿革拷锟斤拷锟斤拷私锟街拷锟斤拷业贸锟揭伙拷锟斤拷锟斤拷郏锟� 锟斤拷锟斤拷通锟斤拷4.7K锟斤拷锟斤拷牡锟斤拷锟斤拷浅锟叫★拷锟紸tmega8锟斤拷锟诫级锟节诧拷锟侥憋拷锟斤拷锟斤拷锟斤拷锟窖撅拷锟姐够锟剿★拷 实锟斤拷锟斤拷锟斤拷锟角诧拷锟斤拷锟角憋拷锟斤拷使锟斤拷锟斤拷压锟斤拷锟斤拷锟杰★拷没锟斤拷锟斤拷压锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷锟斤拷什么影锟届。

Linux I2C锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷锟斤拷一锟斤拷锟斤拷全锟斤拷I2C协锟斤拷栈锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷要一锟斤拷小锟斤拷锟斤拷锟斤拷锟叫癸拷锟竭ｏ拷 锟斤拷锟斤拷一锟斤拷锟斤拷应锟矫诧拷锟斤拷锟斤拷锟斤拷锟轿猴拷锟斤拷锟斤拷目锟斤拷锟节猴拷模锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷憧匆伙拷锟絠2c_m.c锟侥硷拷锟斤拷锟斤拷锟斤拷锟截诧拷锟街ｏ拷锟斤拷锟斤拷涂锟斤拷钥锟斤拷锟矫恳伙拷锟絀2C锟斤拷息锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟截的癸拷锟斤拷摹锟�

为锟剿诧拷锟斤拷锟斤拷锟斤拷位锟斤拷锟斤拷锟角憋拷锟斤拷锟斤拷锟絉C232锟接口碉拷锟斤拷锟斤拷锟斤拷拧锟� 锟斤拷锟斤拷锟斤拷ioctl锟斤拷锟斤拷锟斤拷实锟街的ｏ拷 
        // set RTS pin:
        int arg=TIOCM_RTS;
        ioctl(fd, TIOCMBIS, &arg);
锟斤拷锟竭诧拷锟斤拷一锟斤拷0锟斤拷 
        // clear RTS pin:
        int arg=TIOCM_RTS;
        ioctl(fd, TIOCMBIC, &arg);
锟斤拷锟斤拷锟斤拷虢拷锟揭恍拷锟秸伙拷锟街诧拷锟斤拷锟斤拷锟斤拷锟酵拷锟絆S锟较ｏ拷锟斤拷只锟斤拷亩锟斤拷锟叫╋拷芯涂锟斤拷锟斤拷恕锟� 锟斤拷锟斤拷锟侥讹拷锟斤拷锟斤拷通锟斤拷C锟斤拷锟皆★拷  

USB锟斤拷RS232

锟斤拷锟节碉拷锟斤拷锟斤拷些没锟斤拷RS232锟接口的笔记憋拷锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷说锟斤拷锟斤拷锟斤拷约虻サ锟绞癸拷锟経SB-RS232转锟斤拷锟斤拷锟斤拷 锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷一锟斤拷没锟斤拷锟斤拷锟街碉拷转锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷Prolific 2303芯片锟斤拷 锟斤拷转锟斤拷锟斤拷锟斤拷/proc/bus/usb/devices锟侥硷拷锟叫匡拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷 Vendor=067b ProdID=2303 Rev= 2.02锟斤拷 锟斤拷锟斤拷圆榭达拷锟� "Use your ATEN UC-232A USB adapter with Linux (Linuxfocus, November 2001, article 223)".  

锟斤拷锟斤拷

mount the sensor 锟斤拷锟斤拷锟斤拷锟窖撅拷使锟斤拷锟斤拷一锟铰度硷拷2锟斤拷锟斤拷锟剿ｏ拷锟揭非筹拷喜锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟街憋拷哟锟揭猴拷锟斤拷锟绞撅拷锟斤拷隙锟饺★拷露取锟� 锟斤拷锟斤拷锟斤拷也锟斤拷锟皆斤拷锟斤拷锟叫碉拷锟斤拷锟捷存储锟斤拷锟斤拷锟絇C锟较★拷锟斤拷锟斤拷锟街憋拷涌锟斤拷锟揭诧拷锟斤拷锟酵筹拷苹锟酵硷拷锟斤拷浅锟斤拷帷�

锟斤拷锟斤拷拇锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞碉拷锟侥憋拷锟斤拷锟皆憋拷锟斤拷锟斤拷晒锟斤拷锟杰★拷锟斤拷锟斤拷越锟斤拷锟斤拷锟斤拷锟揭恍╋拷锟斤拷锟斤拷锟狡凤拷校锟� 锟斤拷锟揭诧拷锟狡硷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讹拷么锟斤拷锟斤拷水锟斤拷锟斤拷锟杰伙拷锟斤拷锟斤拷去锟侥ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷妗� NTC锟角筹拷锟斤拷锟斤，锟斤拷锟绞伙拷锟斤拷锟矫皇裁达拷锟较碉拷模锟街灰拷锟斤拷芨删锟斤拷小锟� 使锟斤拷一锟斤拷锟斤拷装锟侥ｏ拷锟节筹拷锟铰ｏ拷锟斤拷锟接ｏ拷锟斤拷锟斤拷水锟酵匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷


the thermometer


锟斤拷锟斤拷然锟斤拷锟皆达拷 shop.tuxgraphics.org 锟斤拷锟斤拷锟教店定锟斤拷锟斤拷锟叫碉拷元锟斤拷锟斤拷锟斤拷LCD锟斤拷示锟斤拷锟斤拷印刷锟斤拷路锟藉，微锟斤拷锟斤拷锟斤拷锟饺ｏ拷锟斤拷

Have fun!  

锟轿匡拷锟斤拷锟斤拷

 

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 

<--, LF 锟斤拷页
Go to the index of this issue

锟斤拷页锟斤拷LinuxFocus锟洁辑锟斤拷维锟斤拷
© Guido Socher
"some rights reserved" see linuxfocus.org/license/
http://www.LinuxFocus.org 		锟斤拷锟斤拷锟斤拷息:
en --> -- : Guido Socher (homepage)
en --> zh: SEVEN <seven1240/at/163.com>

2005-03-07, generated by lfparser version 2.51