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leo.martinez_oto

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  1. leo.martinez_oto

    Rc method: Strange signals in oscilloscope

    Hi, I am trying to use the capacitive library (rc method) but i get some strange behaviours. First, i develop a program which measures the capacitance of a 20 pF capacitor with a R of 13,25 Mohm and it worked fine. The problem is that I measure the Vref and the Vinput (with an opamp as a voltage follower) with my oscilloscope and i see disturbances in the signals. For instance, not a great square wave signal in Vref and sometimes the Vinput doesn't reach the 3.3 V. Maybe the problem if that i can`t measure the signals... I am doing this in order to measure a capacitance in a pad located 1 metre from the MCU (driven shielded (or active shielded) coaxial cable). I could do it right with a bigger pad but with the real size i can't do it. Maybe it`s impossible... Could you help me? Thanks!
  2. leo.martinez_oto

    Battery problem + LM317 + msp430g2553

    Hi all, Thanks for that. I was forgetting the rst pin. How silly... Thanks.
  3. leo.martinez_oto

    Battery problem + LM317 + msp430g2553

    I have checked it with mu oscilloscope and it works ok. It is not about the input of lm317 because the output it's fine...
  4. leo.martinez_oto

    Battery problem + LM317 + msp430g2553

    Yes, it is 1.8 V. It's checked. The problem is that nothing happens. Whereas, doing the same to the launchpad it works ok. Now, i am connecting a dc transformer from main power to the lm317 but i have a 50 hz wave in each led. Just in that pins of the msp430... It's really strange... I think that i am forgetting something that the launchpad has.
  5. leo.martinez_oto

    Battery problem + LM317 + msp430g2553

    Hi, I have a little problem with my msp430. I am sourcing it through a lm317 which transforms the 3.3v of a battery to 1.8 v. Then i am trying to light some leds. The problem is that it doesn
  6. leo.martinez_oto

    C library for MSP430G2553

    Oh, sorry. I did not know where to post it. Won`t happen again.
  7. leo.martinez_oto

    C library for MSP430G2553

    Thanks. Because I have a MSP430G2553 and i do not want to have unstable results I will read the official documentation and, with the examples given by TI, I will develop my own program. I guess this is the best solution. Regards.
  8. leo.martinez_oto

    C library for MSP430G2553

    What do tou mean with all your needs? Which are the disadvantages of using this library? Is there any general library? I have seen MSP430Ware, but i am not sure if it is for my G2553...
  9. leo.martinez_oto

    C library for MSP430G2553

    Thanks, but that link is for USI i2c and not for USCI i2c... Maybe it is more helpful working with the registers like the examples...
  10. leo.martinez_oto

    C library for MSP430G2553

    Hello, I am working with MSP430G2553 and i was wondering if there any library to this microcontroller. I have seen the code examples and the registers are modified to do something. I am thinking like high level programming. For instance, libraries for i2c or adc would be ideal for me. Thanks!
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