L.O.N.G.F.E.L.l.o.w.

2017年4月15日星期六

Convert NMEA format data to latitude and longitude for GMap Latlng

Reference...

http://aprs.gids.nl/nmea/

Format...

$GPRMC,hhmmss.ss,A,llll.ll,a,yyyyy.yy,a,x.x,x.x,ddmmyy,x.x,a*hh

1 = UTC of position fix

2 = Data status (V=navigation receiver warning)

3 = Latitude of fix

4 = N or S

5 = Longitude of fix

6 = E or W

7 = Speed over ground in knots

8 = Track made good in degrees True

9 = UT date

10 = Magnetic variation degrees (Easterly var. subtracts from true course)

11 = E or W

12 = Checksum

Formula...

Latitude / Longitude = ddmm.mmmm = dd + (mm.mmmm/60) (* -1 for W and S)

Java code...

String str = "$GPRMC,182807.036,A,3731.9404,N,10601.6986,W,0.078542,40.74,050107,,*20"

if( str.startsWith( "$GPRMC" ) )

{

String[] tags = str.split(",");

if( tags[2].equals("A") ) {

String lotdd = tags[3].substring( 0, tags[3].indexOf(".") - 2 );

String lotmm = tags[3].substring( tags[3].indexOf(".") -2 );

float lot = Float.valueOf( lotdd ) + Float.valueOf( lotmm )/60;

if( tags[4].equals("S") )

lot = -lot;

String lngdd = tags[5].substring( 0, tags[5].indexOf(".") - 2 );

String lngmm = tags[5].substring( tags[5].indexOf(".") -2 );

float lng = Float.valueOf( lngdd ) + Float.valueOf( lngmm )/60;

if( tags[6].equals("W") )

lng = -lng;

LatLng pos = new LatLng( lot, lng );

} else {

// Invalid $GPRMC

}

2017年3月26日星期日

python 透過 google smtp server 發信的方法

python code‧‧‧

import smtplib
to = 'where@gmail.com'
server = "smtp.gmail.com"
#port = 465 # ssl
port = 587 # tls
gmail_user = 'youraccount@gmail.com'
gmail_pwd = 'yourpassword or application password'
#smtpserver = smtplib.SMTP_SSL(server, long(port)) # ssl
smtpserver = smtplib.SMTP(server, long(port)) # tls
smtpserver.ehlo()
smtpserver.starttls() # tls
smtpserver.login(gmail_user, gmail_pwd)
header = 'To:' + to + '\n' + 'From: ' + gmail_user + '\n' + 'Subject:test \n'
print header
msg = header + '\n this is test \n\n'
smtpserver.sendmail(gmail_user, to, msg)
print 'done!'
smtpserver.quit()

*如果你有使用兩階段驗證，必須先到 google 個人設定頁，增加應用程式密碼，smtp 才會驗證通過…

https://myaccount.google.com/apppasswords

2017年3月1日星期三

網頁後台使用 php 執行 python 操作 serial (uart) 權限的設定

uart0.php... (透過 shell_exec 執行 python 碼)
===============================================
$cmd = escapeshellcmd ( '/usr/bin/python uart0.py' );
$output = shell_exec ( $cmd );
echo $output;
===============================================

uart0.py... (console下執行沒問題，但透過 php 執行沒結果)
===============================================
import serial
serialport = serial.Serial("/dev/ttyAMA0", 9600, timeout=0.5)
serialport.write( "TEST" )
response = serialport.readlines(None)
print response
===============================================

解決… (需要設定裝置的權限 ttyAMA0 屬於 dialout 群組)
=1=暫時-reboot後無效==============================
sudo chmod 777 /dev/ttyAMA0
=2=============================================
sudo adduser youruser dialout
usermod -aG dialout youruser
===============================================

2016年10月18日星期二

AFS ReVersiNG

AFS ReVersiNG Guide

-working with MAZDA CX5、Cadillac ATS

STEP0. Hardware Analyze - connector defination、power line、data line…

STEP1. Use Linbus/Canbus Analyzer

STEP2, Stage by stage mining Linbus data records, in the meantime watch over AFS's action

ACC OFF
ACC ON
ENGINE START
TURN ON THE HEADLIGHT
GEAR SHIFT TO P/N/D/R/...
TURN WHEEL LEFT/RIGHT
TURN OFF THE HEADLIGHT
STOP ENGINE
ACC OFF

STEP3. Find out the valuable changing with wheel turning

STEP4. Figure out which record is writing and which is reading and what is there meaning

STEP5. Is there any initial progress at beginning ?

STEP6. Hardware implement

STEP7. Firmware implement

STEP8. Cut off KD module and replace with reversing one

Attention: Do not run to this step until you figure out the ECU's every read / write procedure

STEP9. See what happens :)

2016年4月26日星期二

Xilinx Virtual Download Cable using Raspberry Pi

based on this project below…( Thanks this great project )
https://github.com/tmbinc/xvcd

just replacement following function calls…

======== gipo.c ========
#include

#define GPIO_TDI 3 /// JTAG TDI pin
#define GPIO_TDO 12   /// JTAG TDO pin
#define GPIO_TCK 13   /// JTAG TCK pin
#define GPIO_TMS 14   /// JTAG TMS pin

void gpio_init(void)
{
if (wiringPiSetup() == -1)
return;
gpio_output(GPIO_TDI, 1);
gpio_output(GPIO_TMS, 1);
gpio_output(GPIO_TCK, 1);
gpio_output(GPIO_TDO, 0);
}

void gpio_close(void)
{
}
================

======== gipo_inline.h ========
static inline void gpio_output(int i, int dir)
{
if (dir)
pinMode (i, OUTPUT);
else
pinMode (i, INPUT);
}

static inline void gpio_set(int i, int val)
{
if (!val)
digitalWrite (i, 0) ; // Off
else
digitalWrite (i, 1) ; // On

}

static inline int gpio_get(int i)
{
return (digitalRead( i )!=0);
}
================

Tested with NetBeans IDE 8.1 + Raspberry Pi 1 & 2 + Xilinx XC3S400AN

2016年4月22日星期五

NETBEANS 開發 RASPBERRY PI APP

使用 NETBEANS 開發 RASPBERRY PI APP
非常方便，可遠端開發、執行偵錯

請參考此篇…
http://www.raspberry-projects.com/pi/programming-in-c/compilers-and-ides/netbeans-windows/installing-netbeans-for-c-remote-development-on-a-raspberry-pi

主要需增加一個遠端 HOST 的設定

若有使用 WIRING PI 等 I/O 底層服務，則需以 ROOT 身份進行遠端操作
可參考此篇…
http://www.raspberry-projects.com/pi/programming-in-c/compilers-and-ides/netbeans-windows/creating-a-new-project

主要為了打開 ROOT 帳戶
sudo passwd root
sudo nano /etc/ssh/sshd_config
PermitRootLogin and change it to yes (the default "without-password" won't work – change it to "yes"
存檔後 reboot