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Found 16 results

  1. Hi, I'm trying to use an old stellaris launchpad board as a datalogger to an SD card for logging data from an accelerometer. I've already built such a project on the arduino hardware but best I can do is one reading per 2ms and I want to get it logging faster... at least 1 reading every 500us. So I thought I would port it onto the the launchpad boards I had kicking around. Straight up the SD card didn't work trying to use SPI(3) as the underlying SPI bus and I have downloaded and tried about 6 different sd card libraries but got nowhere. What I then did was go back to first principles. Confirm SPI is working on the default SPI bus SPI(2) before switching to SPI3 and before putting the SD libraries on top of it. So I grabbed the simplest SPI product I had, a microchip MCP4251 digital pot and wired it up on a breadboard and confirmed it fully working at 5v with the arduino. The MCP4251 is specced for 3.3v @10Mhz so presumably there should be no issue using it with the launchpad. When I wired it to the launchpad it didn't work. It sort of worked for one of the digital pot's channels but not for the other. It's sort of stuck on power up settings but the behaviour is not logical so I cannot diagnose a problem. I tried the clock divider to slow it down a bit to check if that was the case but to no effect. I tried setting the SPI modes to 0 and 1 as per the pots datasheet and I tried manually pulling down the CS earlier but it seems that the SPI library does something that disables access to the CS pin. Checking and comparing the signals at the chip with a scope they all "appear" correct but I only have a 2 channel scope and no logic analyser so I cannot check it with enough detail to confirm. I can bit bang it but want to do it in hardware. I swapped the pot for 2 others I have and they all perform (or don't perform) exactly the same. There's some sonsistency there at least. At this stage i'm left with wondering if there's an issue with the energia SPI library. Not something I would have expected to be the case as SPI is pretty basic functionality but you never know. Alternatively it's possibly an issue with using the library. Unfortunately there are no examples of SPI usage which are relevant as they all use the msp430. If anyone has an example that they can confirm working against a Microchip product It would be much appreciated. I'm using energia given i'm trying to port arduino code but happy to use CCS which i've used for other projects. I'm at work and don't have the code with me which is why I havent posted code. Regards, David
  2. Good evening, I have been working with the ez430-915 Chronos watch from TI for a project and I need it to communicate with the CC110L RF Anaren Air Boosterpack attached to a Stellaris Launchpad Microcontroller. I have searched around for a solution but all the answers I found were a few years old and did not provide a clear solution. I have also attempted to change the RF settings on the watch to match the AIR Boosterpack according to the user's manual. I am relatively inexperienced with RF modules and settings so I am not sure what exactly I need to change. I used SmartRF Studio to adjust the parameters for the Chronos and started it in packetTX mode to send packets with the launchpad boosterpack running the example energia code for the receiver. The settings are shown below. Base Freq: 903MHz Xtal Freq: 26MHz Carrier Freq: 903MHz Modulation: 2-FSK Data Rate: 38kBaud Channel Spacing: 96.008 kHz RX filter BW: 812.5 kHz TX Power: 10dBm Channel Number: 0 which resulted in the register settings: These all match the settings in the user manual too. 0x29, // IOCFG2 GDO2 Output Configuration 0x2E, // IOCFG1 GDO1 Output Configuration 0x06, // IOCFG0 GDO0 Output Configuration 0xFF, // FIFOTHR RX FIFO and TX FIFO Thresholds 0xD3, // SYNC1 Sync Word, High Byte 0x91, // SYNC0 Sync Word, Low Byte 0xFF, // PKTLEN Packet Length 0x04, // PKTCTRL1 Packet Automation Control 0x45, // PKTCTRL0 Packet Automation Control 0x00, // ADDR Device Address 0x00, // CHANNR Channel Number 0x0C, // FSCTRL1 Frequency Synthesizer Control 0x00, // FSCTRL0 Frequency Synthesizer Control 0x21, // FREQ2 Frequency Control Word, High Byte 0x6B, // FREQ1 Frequency Control Word, Middle Byte 0x24, // FREQ0 Frequency Control Word, Low Byte 0x1A, // MDMCFG4 Modem Configuration 0x71, // MDMCFG3 Modem Configuration 0x03, // MDMCFG2 Modem Configuration 0x21, // MDMCFG1 Modem Configuration 0xE5, // MDMCFG0 Modem Configuration 0x71, // DEVIATN Modem Deviation Setting 0x07, // MCSM2 Main Radio Control State Machine Configuration 0x30, // MCSM1 Main Radio Control State Machine Configuration 0x18, // MCSM0 Main Radio Control State Machine Configuration 0x1D, // FOCCFG Frequency Offset Compensation Configuration 0x1C, // BSCFG Bit Synchronization Configuration 0x47, // AGCCTRL2 AGC Control 0x40, // AGCCTRL1 AGC Control 0xB0, // AGCCTRL0 AGC Control 0x00, // WOREVT1 High Byte Event0 Timeout 0x00, // WOREVT0 Low Byte Event0 Timeout 0x00, // WORCTRL Wake On Radio Control 0xB7, // FREND1 Front End RX Configuration 0x10, // FREND0 Front End TX Configuration 0xE9, // FSCAL3 Frequency Synthesizer Calibration 0x2A, // FSCAL2 Frequency Synthesizer Calibration 0x00, // FSCAL1 Frequency Synthesizer Calibration 0x1F, // FSCAL0 Frequency Synthesizer Calibration 0x59, // FSTEST Frequency Synthesizer Calibration Control 0x7F, // PTEST Production Test 0x3F, // AGCTEST AGC Test 0x88, // TEST2 Various Test Settings 0x31, // TEST1 Various Test Settings 0x09, // TEST0 Various Test Settings I can't seem to get anything to receive on the stellaris with the boosterpack. Would someone be able to help me out? I've been tweaking the settings and testing but I've been stuck for a while now. Any help would be appreciated. I have also attached the code for the energia file I am using to receive data. Thank you, WG Edit: I think I may have this in the wrong thread. I'm sorry about that WirelessTest.ino
  3. mahmoud899

    Stellaris interfacing with LCD

    Hello, I have a Stellaris Launchpad LM4F120XL Board and I am trying to interface with an 16x2 LCD. My LCD requires 5V and my Stellaris Launchpad has 3.3V output power pin. I have 2 questions, 1) Would it be alright if I connected the LCD to an external 5V supply and connected the data pins (D0-D7) to the Stellaris Launchpad GPIOs or do I have to have an LCD that operates on 3.3V supply? 2) Will it work if I connected the LCD to the 3.3V output power pin of the Stellaris Launchpad and connected the data pins (D0-D7) to the Stellaris Launchpad GPIOs ? Thank You
  4. Hello, sorry I'm totally beginner working with Stellaris less than a week so probably those questions will be silly but: I saw a project "Using Stellaris LaunchPad as a Thermometer" I wonder is it possible (and if yes how ?) to port to Energia ? Is there any ready library for DHT11 working with LM4F120 ? I saw this only for MSP430. Thank You Mic
  5. Hello everyone! I dont know how to add a new path in the Includes's folder when i create a new project in CCS v5. Can you help me? Thank you very much
  6. veimmone

    3D model of Stellaris LaunchPad

    Hi all, I created a 3D model of the Stellaris LaunchPad and thought I could share it, so here goes: https://dl.dropboxusercontent.com/u/2496393/StellarisLaunchpad.STEP (attaching .STEP files is not allowed, so Dropbox for now) I included all components I thought had some external relevance (and the chip itself for looks). All the pin positions are according to the LaunchPad manual, so they should be accurate. Other positions have been measured with a caliper, but as always - trust but verify. Dimensions of the pins themselves (apart from height) should not be trusted, they're mostly for looks. If you need it in another format, ask and you might receive. StellarisLaunchpad.STEP
  7. Hi, I've designed a circuit to produce a high voltage, high frequency sine wave from a low voltage square, produced by a microcontroller(Stellaris Launchpad). I've used a simple LC oscillator as a voltage magnifier. Voltage input to LC circuit = 3.3v (peak to peak) Voltage out = 54.42v (peak to peak) Resonance frequency = 355kHz The voltage generator produces a square wave Vmax=3.3v, Vmin=0v, with an internal resistance of 20k ohms at a frequency of 355kHz. Duty cycle is 50%. to simulate the microcontrollers output pin. The buffer IC used, is the LMH6321. Is this circuit effective? Are there any modifications or improvements to it? Any alternative circuits? Also, will the current circuit be safe to interface to the microcontroller (no chances of over heating or short circuiting)?
  8. Hi, I've never noticed that the license for the examples of the stellaris launchpad were closed, they say explicitly that: # Texas Instruments (TI) is supplying this software for use solely and # exclusively on TI’s microcontroller products. The software is owned by # TI and/or its suppliers, and is protected under applicable copyright # laws. You may not combine this software with “viral” open-source # software in order to form a larger program. I wasn't very comfortable with this and I finally decided to write the needed linker script, startup file and the useful Makefile from scratch and license them with a BSD license. You can find my impressions here and the code in this github repository. Right now it doesn't support Stellarisware (It's basically the first working version) but I'm planning to add support for libraries in the Makefile as soon as I have time! I don't think it would be so difficult! Of course the sofware it's opened, so: every help, suggestion, bug issue it's welcome! I hope this would be useful in any way!
  9. Just curious if anyone got newer or even older one , my board is using the e"X"perimental release LX4F120H5QR with revision A3. Fyi, the link for latest errata document, LM4F120H5QR RevA1/A3 Errata (Rev. D) document -> http://www.ti.com/litv/pdf/spmz611d
  10. Hi, This site has been a very good resource. I was able to get debugging from CCS to LM4F120 launpad working from ubuntu. So, now I'm moving on to my next issue... My environment: Ubuntu 12.04; CCS 5.2.1; TI Stellaris LM4F120 Launchpad. The launchpad target has to uUSB ports, one for debug the other for com, e.g. uartprintf(). The qs_rgb and helloworld examples use uartprintf() to communicate with a user, but I have not been able to get it to work from my ubuntu laptop. When I connect the 2nd (non-debug) USB to my laptop it does not enumerate. Any idea how I can get this to work? Thanks
  11. Hi, I'm trying to get my Stellaris Launchpad to work with the Energia IDE. I'm told to upload programs and to run the serial port I've got to create a udev entry. I'm relatively new to linux (although not Ubuntu) so could anyone please provide me with a sample udev file. My Stellaris board's on port /dev/ttyACM0, VID=1cbe and PID=00fd. As of now I'm using this -> # This file allows non-root access to TI stellaris launchpad # See udev(7) for syntax. # SUBSYSTEM=="usb",ATTRS{idVendor}=="1cbe",ATTRS{idP roduct}=="00fd",MODE="0666" KERNEL=="ttyACM0",ATTRS{idVendor}=="1cbe",ATTRS{id Product}=="00fd",MODE="0666" # Thanks in advance
  12. I've followed the cdcacm directions and have the MSP430 working with Energia! Well, I can upload Blinky example anyway. But, I can't get the Stellarpad to work. Upon upload I get "No ICDI device with USB VID:PID 1cbe:00fd found! Failed!" error. Linux Mint 3.2.0-23 kernel, fresh install yesterday Energia latest version downloaded and installed today Any suggestions?
  13. Karma Link. Should be able to see it in your profile view. Also, Stellaris Launchpad Initial Adopter awards will be given till the November 15th, 2012. So if your not awarded, reply below. Also, list the awards you would like to see. I'll start. BP Developer Award Code Contributor Blue Smoke(in case you blow up something, must provide proof)
  14. michalchovanak

    Stellaris LaunchPad and servo control

    Hi guys, i want to make a little project to create a 360°photography tool. My dad has a brand new Stellaris Launch Pad LM4F120, so i want to make it with this piece of hardware. My idea is to control a servo (TowerPro MG995) that will rotate a white desk, where i will have placed for example a Phone. I need to program stellaris to rotate the desk for 22,5°then send a signal to a DSLR to make a photo, then rotate the desk further for 22,5°then make a photo and soo, till i get 16 photos of the phone so i can create a 360°photo. I am new at ARM programing so i need your help to point me to some materials, where i can learn this stuff. Maybe some ol projects to control a digital servo. Thx and hope somebody will answer
  15. At the eStore, the price just went up to $12.99. I thought they would extend it a bit more until they started shipping out and people make something out of it. Increasing it now will only hurt the eco system now.
  16. If by any chance your PC is not able to install drivers for the Stellaris Launchpad ICDI , follow this procedure. The quickstart guide does not have this. You also may want to use this if you have an older version of CCS. my version of CCS is 5.2.1.00018: Plugin your Stellaris Launchpad. You will see the following on device manager: Go here and download the Stellaris ICDI drivers. These are not FTDI drivers, but drivers for the emulator. There is no FTDI on the Stellaris Launchpad Point to the same folder for each of the three drivers. You will get this: Once installed, you will get the following ports: - Stellaris Launchpad virtual Serial Port - Stellaris ICDI DFU Device <------------------DFU for device Firmware Update - Stellaris ICDI JTAG/SWD Interace Hope this helps.
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