Use the Launchpad

Marek Prochazka

Other Parts Discussed in Thread: MSP430F1232

Hi, I use Launchpad. But until now there seems to me that I can not pre-programmed removed and used outside of Launchpad. Is that so?

over 14 years ago

0 Marek Prochazka over 14 years ago

Intellectual 925 points

Launchpad is the programmer or not?

0 Esa Korhonen over 14 years ago in reply to Marek Prochazka

Prodigy 70 points

You can program the MSP430 MCU using the Launchpad and then remove the MSP430 from the socket and use it stand alone.

0 Marek Prochazka over 14 years ago in reply to Esa Korhonen

Intellectual 925 points

But I programmed processor, run the CCS and run it. LED blinks. When I put my CPU and I will contact field, get involved 3.6V, connect LED .... and nothing. Thank You for next tips.

0 Esa Korhonen over 14 years ago in reply to Marek Prochazka

Prodigy 70 points

Make sure that the reset pin is high and you are using some internal clock source. Try without CCS, just power up the launchpad using USB cable. Does it work?

0 Marek Prochazka over 14 years ago in reply to Esa Korhonen

Intellectual 925 points

Thank you very much! I did not know that it should be 3.6 V to pin the "Reset". Now it works :-)

0 Jens-Michael Gross over 14 years ago in reply to Marek Prochazka

Guru 227245 points

Marek Prochazka said:
I did not know that it should be 3.6 V to pin the "Reset".

Actually it shouldn't be pinned to 3.6V. It should be pulled down by a capacitor and pulled high by a resistor. So that it remains low (compared to VCC) for some time until VCC has settled. It avoids that the MSP tries to start while VCC still ahsn't reached the required operating voltage and the MSP crashes.
Most newer MSP series have a voltage supervisor and a brownout detector, whcih make this reset pin handling less critical than with the old 1x MSPs. Still the BOR is released at ~1.5V while 1.8V are required for proper program execution.

0 Marek Prochazka over 14 years ago in reply to Jens-Michael Gross

Intellectual 925 points

Thank you very much, all introduce myself by studying the MSP430 datasheet :-) Before I did just that PIC did not have anything like that.

0 Jens-Michael Gross over 14 years ago in reply to Marek Prochazka

Guru 227245 points

Marek Prochazka said:
Before I did just that PIC did not have anything like that.

For the PICs we used before moving to the MSP430F1232 as replacement, we had to add an external reset controller so the PIC would start up properly under the difficult conditions we had (capacitor power supply directly from AC).

Yes, the MSP datasheet and the users guide should be read completely (at least a quick scan of all chapters) before starting any serious project. It really helps to know what's possible with these chips, before you start doing things in software which can be done in hardware much easier.

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