FirstSome time ago, took a little time to do the number of children learning problems of the small programHomeDo a problem interface (topics are randomly generated every time, subtraction)To record a problem.Now the question is coming, how can we know at any time whether the homework is finished?It's too hard to refresh every time you open the title record page.So I made a Raspberry Pi + small LED light equ
() - whileGpio.input (echo_pin): + Pass At2 =time.time () at return(T2-T1) *340/2 - - Try: - whileTrue: - Print 'distance:%0.2f M'%checkdist () -Time.sleep (3) in exceptKeyboardinterrupt: -Gpio.cleanup ()found that the catch of the exception is for Crtl+c trigger, before my several modules if the output of the CTRL + C or will continue to output, I can only write a script to close the output of the corresponding pin, with this abnormal capture, it is more convenie
Javame embedded 3.3 released, supporting Raspberry Pi
Author: chszs, reprinted with note. Blog homepage: http://blog.csdn.net/chszs
Oracle recently released two javame versions:
First, javame embedded 3.3 for Raspberry Pi (Ea version );The second is javame SDK 3.3 (EA ).
Developers can now develop rich javame app
The problem is the Web server built on the Raspberry Pi, want to control the Raspberry Pi Gpio through the Web page, the webpage is implemented by PHP, through the PHP exec function call write good program implementation of the GPIO
This is a creation in
Article, where the information may have evolved or changed.
This program achieves LED blink in Raspberry Pi with Go lang.//This is the implemented with Hard-coding and uses only main Function.package mainimport ("FMT" "OS" "Time") Func main () {//Initialize GPIO25 FMT . Println ("Initialize GPIO25") fd, ERR: = OS. OpenFile ("/sys/class/gpio/
it here."2" Installation Wiringpi, previously mentioned, check the Gpio pin assignment after installation. The PIN diagram is as follows:"3" according to the figure line, TXD is 8 feet connected to the MAX232 Rx Rxd on the TX, the TTL level to RS232 level so that the computer can recognize.Writing code in "4" Eclipse#include intMainvoid){ intFD; if(FD = Serialopen ("/dev/ttyama0",9600)) 0) {printf ("Serial err\n"); } while(1) {uartbuff[0]=Seri
Look at build 2015 in the middle of the night, basically heard 3, 4 times "Raspberry Pi", but always did not demonstrate win10 in the RPI above what kind of, so ... Try it yourself. First the pit is DISM: see an Ffu file, read the instructions, that is DISM directly deployed to the SD card. So is it possible to use LINUX+DD? Try it, no ... Then using win8.1 for DISM, found error 87, go back to look at the
0. Power supply is micro USB (Android power connector)
1. Download the operating system from the official website and write the memory card with Win32diskimager.
2. Locate the IP and set the static IP under the router:
Command: sudo vi/etc/network/interfaces
Switch
Auto LoIface Lo inet LoopbackIface eth0 inet StaticAddress 192.168.1.88Netmask 255.255.255.0Gateway 192.168.1.1Allow-hotplug Wlan0Iface Wlan0 inet ManualWpa-roam/etc/wpa_supplicant/wpa_supp
Raspberry Pi native Serial port default for console output, if you want to use in your own program need to shut down the system to occupy this serial port.
The method is configured for Rasp-config, or directly modifies the/boot/cmdline.txt
#dwc_otg. lpm_enable=0 console=tty1 console=serial0,115200 root=/dev/mmcblk0p2 rootfstype=ext4 elevator= Deadline Fsck.repair=yes Rootwai
Dwc_otg.lpm_enable=0 console=tty
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