Clik here to view.
Setting ASF to disable toolchain optimization
I hate to spend time trying to remember things that I already did in the past, but all times that I didn’t document it I always spend time figuring it out. When compiling an ELF binary in the Atmel ASF...
View ArticleClik here to view.
What are the types of shaft coupling to use on CNC ?
Coupling are used for transmitting torque between two shafts even when they are misaligned. For hobbyist CNCs they are used to connect the Stepper Motor axis and the leadscrew/ballscrew. Rigid Coupling...
View ArticleClik here to view.
How to update the OpenBench Logic Sniffer’s firmware
First you need to download firmware updater software from here: http://www.gadgetfactory.net/logicsniffer/index.php?n=LogicSniffer.Download Press the UPDATE and RESET buttons of OpenBench board,...
View ArticleClik here to view.
NuttX low power modes
The NuttX power management has four levels or modes (from include/nuttx/power/pm.h): NORMAL The normal, full power operating mode. IDLE This is still basically normal operational mode, the system is,...
View ArticleClik here to view.
Payoneer not that easy as supposed to be
Payoneer motto is: “The Easy Way to Send & Receive Money” But unfortunately it is not… I was trying to add my Payoneer “US Payment Service” bank account to Paypal, but was receiving this error...
View ArticleClik here to view.
How to see a Skype’s user location in the map
You can discover the location of an online Skype user using this approach: 1) Verify if the user is really online; 2) Go to https://www.hanzresolver.com/skype2 and put the Skype user name; 3) It will...
View ArticleClik here to view.
Fixing KiCAD library not found issue
I was receiving this kind IO_ERROR when importing the netlist and want trying to update the component: Errors were encountered loading footprints IO_ERROR: http GET command failed Cannot get/download...
View ArticleClik here to view.
Playing two audio languages of movies at same time
I’m looking for a way to play two audio languages at same time each one in a different audio card. I want to watch movies in the original language (English), but my wife likes to watch it dubbed in...
View ArticleClik here to view.
Hacking MikroElektronika SmartG100 board and connecting to GPRS
I was testing a MikroElektronika SmartG100 board and was facing some issues to get its serial line working. “Fortunately” many people suffered from same issue before me:...
View ArticleClik here to view.
Getting started with PPPD on NuttX
NuttX has PPP support to GSM/3G modems, then I decided to test it with UBlox Leon-G100 modem. As you can see on my previous post I was testing the SmartG100 board on Linux to verify if GSM modem is...
View ArticleClik here to view.
Listing of GSM Modem AT commands
3GPP TS 27.007 Release 9 145 V9.4.0 (2010-06) AT+CAAP 7.25 - Automatic answer for eMLPP Service AT+CACM 8.25 - Accumulated call meter AT+CAEMLPP 7.22 - eMLPP Priority Registration and Interrogation...
View ArticleClik here to view.
Testing an RGB LED in the NuttX
This is a small video showing a small driver I did to control an RGB LED in the NuttX running on STM32F4Discovery board:
View ArticleClik here to view.
Updating Android SDK from command line
I was getting this error message trying to compile an Android application using the gradle : * What went wrong: Execution failed for task ':app:preBuild'. > failed to find Build Tools revision...
View ArticleClik here to view.
Using fastboot with Dell Venue 7 Model 3741
I was trying to get fastboot working with my low cost Dell Venue 7 but the fastboot doesn’t return anything. After some search I found this fastboot binary:...
View ArticleClik here to view.
Using JLinkExe to flash a new firmware into STM32F407
These are the commands I use to flash a nuttx.bin firmware in the STM32F407 microcontroller: $ JLinkExe SEGGER J-Link Commander V4.98e ('?' for help) Compiled May 5 2015 11:49:39 DLL version V4.98e,...
View ArticleClik here to view.
Testing MPU-9250 in the NuttX shell using the i2c command
NuttX is fantastic, just like Linux is… except you cannot run Linux in a fast way in small microcontroller. From NuttX shell (NSH) I could test if MPU-9250 is working, just reading the WHOAMI (0x75)...
View ArticleClik here to view.
nRF51822 and OpenOCD: Cannot erase protected sector at 0x0
If you receive this error message: > flash write_image erase openbeacon.bin 0 auto erase enabled nRF51822-QFAA(build code: G0) 256kB Flash Cannot erase protected sector at 0x0 failed erasing sectors...
View ArticleClik here to view.
Trying the compile nrf51-sdk
These are the steps I’m executing to try to compile the nrf51-sdk on Linux: $ git clone https://github.com/relayr/nrf51-sdk.git $ cd nrf51-sdk $ mv build.mk Makefile $ cd nordic/ $ unzip...
View ArticleClik here to view.
Fixing gnu arm toolchain issues Ubuntu vs Terry Guo
I was using the default “gcc-arm-none-eabi” package from Ubuntu 14.04 but was receiving this error message when trying to compile “nrf51-sdk”: arm-none-eabi-gcc: error: nano.specs: No such file or...
View ArticleClik here to view.
Getting started with PPPD on NuttX
NuttX has PPP support to GSM/3G modems, then I decided to test it with UBlox Leon-G100 modem. As you can see on my previous post I was testing the SmartG100 board on Linux to verify if GSM modem is...
View Article
