BSL Response

Hy Gs!

The BSL in FR5739 is etched in ROM Mask. What silicon version is your chip? I do not think the BSL will do what you said.

My guess is, the FRAM is already loaded with someone's code. And that code is sending you "Hy Gs!" via UART at 115.2 kb/s

yes, good catch, you are correct!

I'm not getting response from the MSP430 and I think the reason is because I don't have even parity enabled on my com port:

From the user guide:

UART Protocol
The UART protocol applied here is defined as:
• Baud rate is fixed to 9600 baud in half-duplex mode (one sender at a time).
• Start bit, 8 data bits (LSB first), an even parity bit, 1 stop bit.
• Handshake is performed by an acknowledge character.
• Minimum time delay before sending new characters after characters have been received from the
MSP430 BSL: 1.2 m

You could use BSLDEMO2 or BSLscripter on the PC. If you do not have the hardware interface required, you could use a G2 LaunchPad as that interface (in a very sneaky way). See: Launchpad-Based MSP430 UART BSL Interface (Rev. A)

There is also prepared script for MSP430FR5739 in slaa535 LaunchPad-Based MSP430 UART BSL Interface

slaa535\LPAD_BSL_INTERFACE\TestScripts\MSP430FR5739

You shouldn't drive TCK pin. You should have driven TEST pin with the signal inverted.

Sorry I did not notice this earlier.

That was it!  Many Thanks.