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Found 5 results

  1. SRAM decay and reset

    Hi all, I have a potentially odd question. I am using and MSP430FR5994 board and would like to measure SRAM decay. However, whenever I toggle the system from on to off and then on again the locations in SRAM that I am reading are full of random of values. While I would expect random values, I would not expect them at the timescales that I have the system off. The system is off for no more than 10ms. According to https://spqr.eecs.umich.edu/papers/rahmati-usenix12.pdf that should be short enough where I get very little decay. I should also specify that the random values seem to be consistent across runs; what I mean is they don't really seem random at all since the values appear each time. Some Questions: 1. Could this have something to with my SRAM controller settings? I do not set anything in this regard. 2. Could this have something to do with the way I am powering the board? Probably out of the scope of this forum, but I do have a capacitor, so even though I say "turn off," the voltage supplied to the board usually does not reach zero. Cheers!
  2. MSP430 and I2C

    I have been trying to use a simple I2C sensor (LM75) with a MSP430FR5994. I find there are two pin maps. One at Energia (http://energia.nu/wordpress/wp-content/uploads/2016/11/Capture-2016-11-30-à-15.10.44.png) and one at TI directly (http://www.ti.com/lit/ml/slau677/slau677.pdf) on page 2. I have tried using I2C (1) as indicated at in the TI reference, and I have tried I2C (2) as indiicated in the Energia reference. neither one work. I can use an Arduino to access the sensor so I have some hope that this might work. What pins do I need to use to use I2C? Is there a library call to specify which I2C pins to use? By the way, I can connect to the board and load the blink sample, and I can do serial communication, so board connectivity is OK, I2C is not. Gerald
  3. Are there any plans to add support to Energia for the new MSP430FR5994 LaunchPad? It has a really nice specification including 256 KB FRAM, 8 KB SRAM, a maths accelerator, and an on-board micro SD card. It looks like an ideal platform for my small Lisp interpreter, uLisp.
  4. Hi, TI has a new launchpad MSP430FR5994 LaunchPad Development Kit based on the MSP430FR5994. The new controller is in "Preview" status , but looks interesting -- 256KB FRAM + 8KB RAM + a Low-Energy Accelerator for Vector Math Operations ( TI claims 35x Faster Than ARM Cortex-M0+ Core for 256-Point Complex FFT ). Check the app note Benchmarking the Signal Processing Capabilities of the Low-Energy Accelerator (Rev. A) for details. The launchpad itself is interesting as it has an on-board micro SD card and super capacitor. Has any one got hands on experience with this one? I was thinking of getting one for a data-logging application, 256KB FRAM + SD card combo is very much tempting. Would like to hear from you guys , has TI finally going in the right direction, as far as MSP430 is concerned, with the LEA in the fight against ARM?
  5. Looks like TI have launched a new part, 256KB FRAM and 4 UART's a dream for me. Is Energia support available at launch? Happy to help out if not. http://www.ti.com/tool/msp-exp430fr5994 Great news or a very cruel April fool!
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