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Found 10 results

  1. Am I missing something obvious? To save power I want to run this processor at 1 MHz so I amended the boards.txt in Energia 18 as follows: (see below, the second half). The sketch does work at 8MHz and 16MHz. An related question is this: where is F_CLK specified in an Energia sketch imported into CCStudio? MSP-EXP430FR5969LP.vid.0=0x2341 MSP-EXP430FR5969LP.pid.0=0x0c9f MSP-EXP430FR5969LP.name=MSP-EXP430FR5969LP MSP-EXP430FR5969LP.build.mcu=msp430fr5969 MSP-EXP430FR5969LP.build.f_cpu=8000000L MSP-EXP430FR5969LP.build.core=msp430 MSP-EXP430FR5969LP.build.variant=MSP-EXP430FR5969LP MSP-EXP430FR5969LP.build.board=MSP-EXP430FR5969LP MSP-EXP430FR5969LP.upload.tool=dslite MSP-EXP430FR5969LP.upload.protocol=dslite MSP-EXP430FR5969LP.upload.maximum_size=65536 MSP-EXP430FR5969LP.upload.maximum_data_size=2048 MSP-EXP430FR5969LPmhz1.vid.0=0x2341 MSP-EXP430FR5969LPmhz1.pid.0=0x0c9f MSP-EXP430FR5969LPmhz1.name=MSP-EXP430FR5969LP_1MHz MSP-EXP430FR5969LPmhz1.build.mcu=msp430fr5969 MSP-EXP430FR5969LPmhz1.build.f_cpu=1000000L MSP-EXP430FR5969LPmhz1.build.core=msp430 MSP-EXP430FR5969LPmhz1.build.variant=MSP-EXP430FR5969LP MSP-EXP430FR5969LPmhz1.build.board=MSP-EXP430FR5969LP MSP-EXP430FR5969LPmhz1.upload.tool=dslite MSP-EXP430FR5969LPmhz1.upload.protocol=dslite MSP-EXP430FR5969LPmhz1.upload.maximum_size=65536 MSP-EXP430FR5969LPmhz1.upload.maximum_data_size=2048 sketch_mar29a.ino
  2. Hi All, I'm new to the forum, and fairly new to developing for TI chips, that being said I've played about in TI-RTOS for the SensorTag. I am trying to build a low power sub-GHz network, and as such I've got hold of some CC1310 LaunchPads, and I'd love to use Energia for my project. Can someone please explain how to put this board into any or each of the different low power modes it has? I've tried using the Sleep() command, but the compiler tells me it's not defined, and when I measure the power of the LaunchPad board during a Delay() command I'm seeing several mA. If I can get this down to tens of uA I'd be very happy. All and any help is greatly appreciated. Regards, -Steve
  3. Hello Folks, Here is Malkiat Singh from Punjab India.This forum has been doing a suberb job and lot of great topics enlighting various aspects on Low-power microcontrollers. I was reading " What's left for MSP430?" and decided to join a forum. Wonderful job by you guys. Currently, I am making various agro-based sensors and scratching web and 43oh.
  4. I've been lurking here for awhile... I am a noob to Energia, but have more than a little experience designing and writing interrupt-driven C code for msp430f2013, as well as some time spent with the value line devices. I am working on a personal project with the F5529, connecting to a GPS (the adafruit ultimate BOB), an Iridium 9602 Sat-Comm device (sparkfun RockBlock), and a cap touch TFT LCD (have worked with both the adafruit 2.8" BOB and a www.buydisplay.com version of same). The project is a DIY short-burst-data comm device to let my wife know I've not been eaten by a bear on an upcoming 250 mile hike on the John Muir Trail. Oh, and I'm aware that there are commercial devices available ($600 - $1200 plus subscription fees). I chose the F5529, in part, for the dual hardware UARTs, one connected to the GPS @9600 and the other to the 9602 @19200. The LCD uses SPI for screen management and I2C for the cap-touch interface. While the system is up and running, the different devices will not be running concurrently. I had been thinking of a LPM3 timer interrupt-based system that would capture and communicate position data on an hourly basis during the day, and that I could put into LPM4 at night to conserve battery. The LCD merely provides a UI for mostly menu-driven messages and system-state options, but may include a free text option to send a special message, or read a message from my wife. In C, I have successfully connected to all three devices using both UARTs for the two async devices with both a F5529 launchpad, and also an MSP-FET430U80+F5529. I've been intrigued by Energia as a means to code my project a little more quickly with "trusted" libraries. But on closer inspection, I see that the basic construct for Energia is one focused on Arduino compatibility and not necessarily low power interrupt-driven designs. I've read several discussions on this board regarding using low power modes, and the potential for interfering with the Energia architecture, as well as possible workarounds. I've also looked at pabigot's class libraries, and they look like a solid alternative, but I'm not sure my C/C++ skills are really up to snuff to effectively use the work. I do have some questions regarding Serial, Serial1 and the backchannel UART, but I need to do some more experimenting so I can ask better questions, assuming I can't find my own solutions. TIA for any thoughts, suggestions, etc! Bob
  5. For low power application (in our case a standalone RedBear Micro with CC3200 on solar cells) it would be desirable to limit transmission power of the 3200 to the minimum necessary. According to the TI datasheet, this could reduce power consumption for transmit from 229mA to ~140mA. Is there any API approach to do this ? ( Would reduction of the M0 clock rate reduce power, too, and if yes, how could it be done ?) Thanks
  6. I was wondering if anybody has been able to get LPM modes working with Energia EMT and the MSP432. I have tried a few things, but have been unsuccessful in lowering the current draw of the MSP432. Any insights would be appreciated. Thanks!
  7. Last updated: May 07, 2015 May 07: added SBM-20 background CPM value vs 1kg potassium salt and python code to log the data. April 26: added deadtime image. April 23: updated to 75
  8. Here's an in-depth article by Jack Ganssle about the challenges of running an MCU project for a decade on a coin cell: Hardware and Firmware Issues in Using Ultra-Low Power MCUs http://www.ganssle.com/reports/ultra-low-power-design.html Ignoring the fruitless rant about what "typical" means, it's a pretty interesting read. I was not aware of that leakage of decoupling caps can be such a major factor.
  9. Hi guys, For my final year project I'm going to be doing some embedded development related to "the internet of things". The specs aren't fully formed yet but it'll be mcu+sensors+wifi+maybe some actuators. At the moment I've been doing some research on components, and was wondering if I could get some of your input? So for wifi connectivity I'm looking at the CC3000 and RN-171, and currently favouring the CC3000. I was wondering if anyone worked with either of these chips, and what they thought about them? My big question involves choosing a microcontroller (ideally a development board initially). The final application will likely be battery powered, so low power is a must. Sensors etc need some a/d, and since it is wifi enabled I would like a reasonable amount of RAM/Flash to experiment with. Currently, since I have some experience with the value line series, I'm considering the MSP430F5529 board since it seems to have ample resources. I was wondering if anyone could weigh in with thoughts/ ideas/ suggestions? I've also been looking into the STM32LVDISCOVERY board, but have seen a few complaints with about the quality of resources (libraries etc) available for it. I know this forum might be biased towards the MSP430 but I'm posting in other micros hoping to get the opinions of those who have worked with other brands, but all feedback is welcomed :grin: (Its not a major issue for me, but when it comes to development I tend to prefer working in Linux and avoiding the use of an IDE, so any chips with compilers that support Linux would be a bonus )
  10. Hi, All. I am New to the TI 430 devices and am a retired engineer looking for a truly Low Power display for a Home Status Monitor for the elderly and physically disabled. The EPD device looks to be a natural for this purpose. Doc
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