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Found 14 results

  1. I'm following the attached I2C example code provided by TI. The MCU is put into LPM0 with three interrupts enabled. On a pending RX interrupt, the ISR stores one byte of the receive buffer and clears the LPM0 SR bits taking the MCU out of LPM0 (lines 133-135). What's the reason for exiting LPM0? And why isn't the __bic_SR_register_on_exit(LPM0_bits) used for the NACIFG and BCNTIFG? msp430fr235x_euscib0_i2c_10.c
  2. Hi, guys. I use ENERGIA on Windows 10 with two launchpads; MSP-EXP430FR2355 and MSP‑EXP432P401R. The low power modes for instance http://dev.ti.com/tirex/explore/node?node=ACF129zBlYdZobLAvNAIKw__IOGqZri__LATEST MSP430FR2355's LPM4.5 mode, http://dev.ti.com/tirex/explore/node?node=AG55-ANEqflMyH6kh9dbJA__z-lQYNj__LATEST MSP432P's LPM4.5 mode examples were a good reference when using CCS. I want to migrate these examples when I'm using ENERGIA. Are there functions to enter LPM4.5 or other low power modes when using ENERGIA?
  3. Hi, I’m trying to get my MSP-EXP430FR5969 (or preferably MSP-EXP430F5529) to work with BOOSTXL-SHARP128 at a few uA when it is not selected or being written to, i.e. when it’s idle. My MSP430s consume only a fraction of a uA in lowest power mode, but as soon as I add myScreen.begin() to setup(), it all goes crazy. In my sketch (below), I have set all ports as outputs to ensure there are no floating inputs. This reduces current consumption from several hundred uA to ~160 uA. I then connected my BOOSTXL-SHARP128 to my MSP-EXP430FR5969 via jumper wires to LCD_DISP, LCD_CD, SPI_CLK, SPI_
  4. Hi, I was working on interfacing my MSP430 with a 4x4 keypad and I stumbled upon this application report. Then I looked into the specific low power modes of the F5529 and noticed that there was a LPM4.5. The application report uses LPM4 as it isn't the same device, and I was wondering if it was possible to use LPM4.5 as the device was waiting for keypad input as my goal is to minimize power usage.
  5. First, I'd like to say thanks for the implementation of EasyLink for the cc1310/cc1350 in Energia 18. Last year the community was invaluable in helping me develop some MSP430FR5949/BME280 dataloggers for my dissertation research. I'm working on a new version based off the cc1310, because well, transmitting my data wirelessly sure beats having to recover the dataloggers. I have a couple questions that I have been unable to answer - 1. The EMT documentation suggests that if you use delay, during compiling this is converted to a low power mode. Is this only for the MSP430/432 variants?
  6. Good morning everybody, I'm Curtis, Fairly new to the world of MSP430, but VERY HAPPY that this forum exists. Energia has made my life much easier. I was about to make a hole in my wall by repeatedly bashing my head against it, but Energia removed a bunch of the minutia and provides a great abstraction layer and way of programming the MSP4230G2553 controller. See ya 'round, Curtis
  7. 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!
  8. G'day, How can I enter/exit the LPM's on a Tiva? (Can do it OK on the 430) Grant
  9. My question is about where in the code I
  10. Hi, I'm newbie in low power mode. I've seen a lot of examples but I'm not able to see a low current in LMP4 mode. The lowest current I can see is about 90uA. Is there a minimal working sketch in order to run LPM4 mode and wake up the microcontroller with an external interrupt and switch on a led? My hardware is launchpad V1.5 with Msp430G2553. Both red an green leds are off. I've removed all the jumpers (Vcc and uart, NOT rst and test) and my power supply is a battery at 3.5V. Thank you for your help and sorry for this newbie question.
  11. I am currently working on a battery operated wireless doorsensor. A message is sent whenever a magnetic switch causes an interrupt. I have read some topics on this forum and changed some lines in Winterrupts file and created the following sketch: #include <x10rf.h> #define intpin1 P1_5 #define txpin P1_7 #define txvcc P1_0 #define reps 4 x10rf myx10 = x10rf(txpin,0,reps); void setup() { myx10.begin(); pinMode(intpin1,INPUT_PULLUP); pinMode(txvcc,OUTPUT); digitalWrite(intpin1, HIGH); digitalWrite(txvcc, LOW); attachInterrupt(intpin1, Wake, CHAN
  12. So finally coded up my lm4970 project. And using a interrupt on switch p1.3, and tried to get LPM. Well, it didn't work. If I remove LPM, it works, but with a huge issue where it keeps looping, but still works. So the only problem is my main code, not the usi/i2c/lm4970 code. What I expect it to do: Initialize everything (Works)Go Into While LoopSwitch on State Variable Run given Case, Break out of Switch Enable Interrupts and Go to Sleep ( LPM4 + GIE )Sleep until Interrupt Interrupt Disables GIE and LPM4, Increases State Variable Exit Interrupt, reach end of While Loop, back to Switch S
  13. The same question is posted on reddit here: http://redd.it/18bkdl We are meeting with our project sponsors tonight and would love to have some kind of answer as to what's going on with our power draw. We are using an MSP430 Launchpad to develop a small project to be powered by a solar cell. Eventually we will have a single hardware interrupt, and a 30 Hz counter interrupt to update an LCD. We have estimated our power budget to be around 20 micro Watts. Oddly, with the software I have written and provided below, we are getting around 30 micro amps at 2.2V when we separate the MSP fro
  14. Could someone throw out some example code of how I could for instance, run some code, go into LPM3 or 4 for 60 seconds, then run the code again? So: Loop: Do something Sleep for 60 sec Couldn't the watch dog timer be used to accomplish this? I have looked at some examples, I am just having a hard time seeing how to make it all work in the Energia IDE. Here is the sample code I have been looking at...I get what is going on here, but what I want is to get rid of the parts setting LED on or off, and turn it into a function so that I can call it, it will sleep, then t
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