BSL For msp430f168

Santiago Perrotto Seeber

Other Parts Discussed in Thread: MSP430F168

Hi! I'm trying to communicate with the msp430f168 through the bootloader but i can't.

I've checked the signals going out of my computer like test and reset which are the ones that activate the bootloader but no response has came from the uP. And the TX line of the bootloader didn't put in idle state.

I've checked the pinout used but i guess i can be wrong.

Please let me know:

PC signal name ------------------------ MSP Signal name (pin number)

RXD BSL TXD/ P1.1 (PIN13)

TXD BSL RXD/P2.2 (PIN 22)

RTS TEST/TCK (PIN57)

DTR RESET (PIN58)

The signal coming out of my computer to activate the bootloader it's as the one shown in the Bootloader User's Guide. So... i guess the software is not the problem. So... i have two choices: wrong pinout or the uP is not working. In which case i'd like to know if there's a way to chaeck it out.

Thank's for your help!

over 14 years ago

0 old_cow_yellow over 14 years ago

Guru 58965 points

Do you use a RS232 to 3.3V level converter?

What "Bootloader User's Guide" are you referring to?

SLAU265a.pdf Figure 2-3 on page 13 shows waveforms of the 3.3V signals that are connected directly to the MSP430 pins. They are not the signals that come out directly from the PC.

0 Santiago Perrotto Seeber over 14 years ago in reply to old_cow_yellow

Prodigy 30 points

Thanks for your response.

Well... the the Bootloader User's Guide i refer is is the one you mentined SLAU265.pdf.

I use a USB to serial connector. And the signals i measured are the ones the uP is getting.

Any further information anyone needs, please let me know.

0 old_cow_yellow over 14 years ago in reply to Santiago Perrotto Seeber

Guru 58965 points

1) Double check the polarity of the signals. Fig 2.2 is for low pin count chips that use TEST instead of TCK. Fig 2.3 is the one for your chip.

2) If the existing code in your chip uses the nRST/NMI pin for NMI, it may causes a problem. You need to drive that pin low and hold it low when you power up the chip.

0 Santiago Perrotto Seeber over 14 years ago in reply to old_cow_yellow

Prodigy 30 points

Thanks! I tried the reseting thing and worked perfectly. But, why does it start in an NMI mode? Or is that another problem?

Anyway, thank you!

0 old_cow_yellow over 14 years ago in reply to Santiago Perrotto Seeber

Guru 58965 points

See last line of Section 2.2.1 or 2.2.3 in slau256a.pdf

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BSL For msp430f168