• State Resolved
  • Locked Locked
  • Replies 8 replies
  • Subscribers 79 subscribers
  • Views 1027 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

development system w/240x240 display controller, pressure sensor & Origin GPS module for MSP430 LO92

Mike Landis
Prodigy 30 points

Other Parts Discussed in Thread: MSP430L092, MSP430F5438A

Can anyone recommend a development kit for MSP430 LO92 that includes (or can incorporate) a 240x240 color display controller, miniature pressure sensor, and Origin ORG447X GPS module?

  • 0
    Guru 227245 points

    None of the MSP development kits has a color LCD (even though some have a B/W matrix LCD). Also, I don't know of any experimenter board with a pressure sensor (IIRC, the Chronos watch has one for altimeter, but none of the exp boards). And I don't know of any GPS module present on any EXP board, let alone this specific brand. However, most boards have breakout connectors and on those you usually can connect an LCD though SPI, a pressure senor through I2C or a GPS module through UART.

    I don't know why you want to do it with an L092. THe main purpose of using the L092 is to run on ultra-low voltage, and neither LCD (let alone color LCD) or GPS will run on low voltage (and GPS won't run on low current too). It sounds like building an F1 racing car and then putting a go-cart 'motor' in it to reduce gas consumption.

  • 0 in reply to Jens-Michael Gross
    Prodigy 30 points

    Thanks, I suspected as much on the sensor front.  I have dinky GPS and a WWVB receivers in mind, but I could still use temperature, pressure, perhaps others (still up in the air).

    On powering an F1 with go-cart motor... when battery life is paramount, you have to save where you can - maximally separating time between charges is all I'm after.  Now leaning toward a Nios II/e, expecting it's significantly smaller silicon footprint to aid battery conservation.

  • 0 in reply to Mike Landis
    Guru 227245 points

    Mike Landis said:
    On powering an F1 with go-cart motor... when battery life is paramount, you have to save where you can

    But it makes no sense sacrificing functionality and features for saving a few µA, when there is a GPS module that burns some 100mA and an LCD that doesn't require much less.

    And even if I agree that there might be an application that requires such a setup, it makes no sense creating a demo board for this. For the one or two customers who might perhaps find it useful.

    Compared to the power consumption you have on your application, the difference between the MSP430L092 and the MSP430F5438A (consumption-like) is so small that it isn't worth dealing with the L092 limitations. And if you properly use the low-power features, then the difference is even smaller.

  • 0 in reply to Jens-Michael Gross
    Prodigy 30 points

    Actually, 28mA GPS (which would still be a huge load on a watch battery) is possible and OLEDs are much more efficient than backlit TFTs (if you can find one that works), so not as dire as you suggest.

  • 0 in reply to Mike Landis
    Guru 46710 points

    Mike Landis said:
    Actually, 28mA GPS

    Anyway first thing you do - calculate power budget for your device, battery capacity needed. When you are done - come back and show which exactly battery you think is OK for your project. Would be nice to select battery having proper datasheet so we can read it.

  • 0 in reply to Mike Landis
    Guru 227245 points

    Mike Landis said:
    Actually, 28mA GPS

    That's quite low. However, the difference in MSP power consumption is still only 1 or 2% of this. Not to mention that the GPS surely needs more than 0.9V (and the LCD or OLED too), so what you gain with using the L092 you lose on additional voltage regulation.

    If the battery only lasts one day, I wouldn't care for +-15 minutes. That was my point.

  • 0 in reply to Jens-Michael Gross
    Guru 46710 points

    Jens-Michael Gross said:
    difference in MSP power consumption is still only 1 or 2% of this.

    GPS updage rate is not that fast meaning that msp can sleep between updates consuming nearly zero power compared to 28mA. So virtually _any_ msp is OK for application not to mention any modern uC

  • 0 in reply to Ilmars
    Guru 227245 points

    Ilmars said:
    msp can sleep between updates consuming nearly zero power compared to 28mA. So virtually _any_ msp is OK for application

    That's what I meant a few posts before when saying "And if you properly use the low-power features, then the difference is even smaller."

**Attention** This is a public forum