In “tinyK20 Open Source ARM Debug/Universal Board – First Prototypes” I talked about using a USB thumb drive enclosure for the board, so here is the idea:
Thumb Case for tinyK20
tinyK20 USB Thumb Drive Enclosure
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Tag Archives: Building
Editing Compiler Include (or other) Settings in Eclipse
So now I have carefully set up my compiler include paths in Eclipse to tell the GNU compiler where to find my header files:
Include Paths
The question is: how can I apply these settings to another project?
CRC Checksum Generation with ‘SRecord’ Tools for GNU and Eclipse
One of the things missing for Embedded in the GNU linker is that it cannot generate a CRC checksum. Luckily, there is the solution of using SRecord:
Semihosting with GNU ARM Embedded (Launchpad) and Kinetis Design Studio
A while back I wrote two articles about Semihosting: “Semihosting with GNU ARM Embedded (LaunchPad) and GNU ARM Eclipse Debug Plugins” and Semihosting with Kinetis Design Studio. With using the GNU ARM Embedded (lauchpad) in my Kinetis Design Studio, time for a ‘summary’ post :-).
Semihosting Output in Console
Sensirion SHT11 Temperature and Humidity Sensor on a MikroElektronika Click Board
In one of my earlier posts (“Using the DHT11/DHT22 Temperature/Humidity Sensor with a FRDM Board“) I’m using the DHT11/DHT22 temperature/humidity sensors with the FRDM-KL25Z board. These sensors are very inexpensive, but have limited measurement range and accuracy. As pointed out by a reader of that article, Sensirion (a Swiss company :-)) has good sensors too, and I decided I would like to try the SHT11 sensor:
- 0-100% Relative Humidity
- +/- 3% Relative Humidity accuracy
- -40 – +125°C
- 2.4 – 5.5V supply voltage
SHT11 Sensor
Poor Man’s Trace: Free-of-Charge Function Entry/Exit Trace with GNU Tools
There are cases where my application runs find for days, weeks or even months, but then from time to time there is an application crash. Yes, the watchdog will recover it, but still it would be good to know what happened? One solution would be to hook up a trace probe (like the one I have described in this post: “First Steps with the P&E Tracelink“). But having such a trace probe attached all the time is first not cheap and second not always possible. So what if the application would leave ‘breadcrumbs’ behind which would tell me the flow of the program leading to the problem? I have found a functionality in the GNU tools which seems not be widely known or use, but is incredibly helpful in such cases.
So what if I could get a log like this telling me which functions get called by whom?
{ 00000E88->00000DA0 ???->DEMO_Init
} 00000E88<-00000DA0 ???<-DEMO_Init
{ 00000E8C->00000D40 ???->DEMO_Run
{ 00000D62->00000CE8 DEMO_Run:0x0022->decide
{ 00000D0E->00000C60 decide:0x0026->calcValue
} 00000D0E<-00000C60 decide:0x0026<-calcValue
{ 00000D16->00000CA0 decide:0x002E->getValue
{ 00000CC6->00000C60 getValue:0x0026->calcValue
} 00000CC6<-00000C60 getValue:0x0026<-calcValue
} 00000D16<-00000CA0 decide:0x002E<-getValue
} 00000D62<-00000CE8 DEMO_Run:0x0022<-decide
{ 00000D62->00000CE8 DEMO_Run:0x0022->decide
Solving the 8192 Character Command Line Limit on Windows
There is a really annoying issue with using command line tools on Windows: the maximum length of the command line passed to cmd.exe is 8192 characters (see http://blogs.msdn.com/b/oldnewthing/archive/2003/12/10/56028.aspx). So you think this is not a problem for you, as you would not pass such a long command line to cmd.exe (the DOS shell under Windows)? Well, if you are using Eclipse (as I do) which generates make files (which is the normal way), then the cmd.exe very likely is involved to call the compiler/linker/etc, indirectly with the usage of make.exe. Compiling files is usually not a problem as it does not hit that 8192 limit. However, it is likely that link phase will end up with an error:
Error in the Problems View
If you have such a problem, there is a solution ….
Altium File for Freescale FRDM-K25Z Board
If you are designing your own board for the Freescale FRDM boards, then having the matching PCB design files is a good thing to have. I have posted this week an Altium contribution on GitHub for the FRDM headers (see “FRDM-KL25Z Arduino Headers with Altium“). And here there is yet another contribution I received from [Darren]: the FRDM-KL25Z board in Altium :-):
FRDM-KL25Z in Altium
Using Kinetis Design Studio with IAR Embedded Workbench IDE
For everyone who wants to combine the power of Eclipse and Processor Expert with the IAR Embedded Workbench IDE, here is how to get them working side by side:
Continue reading
Creating a Library with Kinetis Design Studio
There is no special option in Kinetis Design Studio ‘New Project Wizard’ (NPW) to create a library (or archive). But it is really easy to create a library project.
Library Project
MCU on Eclipse 