WordPress revolution slider – start an animate on scroll

wordpress-logoThe revolution slider is a way to animate a web page based on a wordpress plugin. When you create a slider it start to be animated directly when the page is loaded. So if your slider is on top of the page it is perfect but if your animation is on the middle / bottom, the animate will be finished when the user will scroll to that part.

It is possible to custom the javascript part and fix this problem as described in this post.

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SWD programming using a RaspberryPi

I previously write this post on how to use a BeagleBoneBlack as a JTAG (SWD) programmer. It was fun but really slow. I port my code on RaspberryPI and now what was taken 5-8 hours is a couple of minutes.

To connect the SWD connector to the PI use the following schema

Connect SWD to RaspberryPi

Connect SWD to RaspberryPi

I use this peace of code to reflash my TD1204 and TD1208 based both on EFM32 when bricked after unsuccessful update…

Here is the python file to interact with SWD : https://github.com/disk91/PySWD/blob/master/RpiGPIO.py

I hop it will be soon integrated in the main PySWD project as the previous one.

You should check or modify flashEFM32.py file

import array

from PirateSWD import *
from RpiGPIO import *
from SWDCommon import *


def main():
    busPirate = RpiSWD("", vreg = True)
    debugPort = DebugPort(busPirate)
    efm32     = EFM32(debugPort)

To run the Flash program, just launch

# ./flashEFM32.py ../myProgram.bin


Manage sigfox device for consumer deployment

sigfoxWhen you plan to deploy / sell sigfox based solution to consumer, you have to manage you device park. The sigfox network have a restricted radio medium to ensure you will not emit more than what you payed for you will be charged by them if a device you own is emitting, even if it is emitting out of your control. There is no network subscription like in 3G before being able to emit so anyone can emit.  That is why, to ensure every one is clear, you have an extra cost if you emit more than you are allowed or if you emit from a non registered device.

When you are designing end-user system you have no control on the device and if you propose a monthly fee to use your solution you will never sure the end user will unplug it once he stop to pay for your service. It means you could have a consumer stopping to pay for your service but a device continuing to emit and sigfox request you to pay for it.

Since the network allow you to have downlink message, now you have the capability to send order to your device and as a consequence allowing you to kill the device remotely. This is a good solution !

Next you have a new scenario where your end user finally decide to reuse your service and want to reactivate the device. At this step you won’t be able to communicate with it and you will have to find another way to reset its state to normal. You can eventually add a “factory reset” button or request to reflash it. There is another funny when : playing with the reboot time.

This post will describe how to lock a device to stop emit on network and how to play with the startup sequence to reset it. Read more !

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Download Arduino 1.5.8 Beta for Mac Os X

arduino_logoAfter having update my Mac Os X, the java 6 have been removed and unfortunately Arduino request to use it. Personally I’m not really happy to install this not even more supported version of Java on my machine.

I was looking for the 1.5.8 Beta made for Java 7. I was not able to download it as the download stops in the middle even if I have a really good transfer rate at the beginning.

It seems that there is no mirror for Arduino (waouhou !! what that sh*t ?!?) and it seems this download problem is not really new. Here is the solution obtained from here. Use command line curl program:

curl -LOGC - http://arduino.cc/download.php?f=/arduino-1.5.8-macosx-java7.zip

The last step to be able to use it is to install Java from java.com

Telecom Design sdk – track your stack usage

When trying to see what is happening with your code, you could try to follow stack size and current running time. Here is a simple function for doing the work :

void dsk_printDebug() {
#ifdef DEBUG
    uint64_t time;
    uint32_t msec, t;
    uint16_t hour, min, sec;
    time = TD_SCHEDULER_GetTime();

    msec = time & 0x3FFF;
    time >>= 15;
    t = time;

    sec = t % 60;
    t = t / 60;
    min = t % 60;
    t = t / 60;
    hour = t % 24;
    t = t / 24;

    #ifndef __ICCARM__
        extern char __cs3_stack[];
        char *limit=__cs3_stack;
        extern char CSTACK$$Limit[];
        char *limit = CSTACK$$Limit;
        uint32_t *sp = (uint32_t *) __get_MSP();

    tfp_printf("[debug] Time:%d.%02d:%02d:%02d.%3d || Stack size : %d / %d \r\n",
        (uint32_t) t, hour, min, sec, (msec * 1000) >> 15,
        ((uint32_t)limit - (uint32_t)sp), CONFIG_STACK_SIZE

Telecom Design SDK – TD_USER_Loop working way

After some discussions this afternoon with TD support and get a good advice from them, this post details some notice about TD_USER_Loop working way and power saving.

For those like experienced with Arduino, Telecom Design loop is not working like

while(1) {

But it is called on Interrupt ; I don’t know why but I was expecting it to be called every tick (32KHz) which was a wrong assumption. In fact, this procedure is called on wake up from any interrupt. The frequency of call can’t be determined, it can be not called in a minute if no events occurs. That is why schedulers helps you to have a predictable call.

Use node & javascript for web crawling

I recently have to crawl the web to get some data from a website, even if I’m more a Java addict and convinced that JavaScript is the 21 century basic, this language seemed to be the more efficient way to do this task.

I discovered for this purpose the use if crawler : a javascript library for node.js

This post details this experimentation.

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Getting start with Square template for Angular.js

Square is a template  you can find on themeforest for 19$ for a single site and for a non profit website. It contains angular, twitter bootstrap and other package already configured to make your project quickly operational.

This post is detailing some way to use it. You won’t find everything but the points I had to search longer before finding a solution. Hope it will help

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