MSP-FET issue.

SIlverwolfman

Intellectual 340 points

Other Parts Discussed in Thread: MSP-FET, MSP430FR5726, MSP430G2553, MSP-TS430RHA40A

I am wiring the MSP-FET usb programmer to Device MSP430FR5726 like what is shown in the pic.

But the CCS couldn't find the chip after compiling: Error connecting to the target: Unknown device

I've double check the connection, seems it is correct. I use Vcc tool from the programer provide 3.3V to the chip.

TDO/TDI connect to pin11, TDI/VPP connect to pin 12, TMS to pin 13, TCK to pin 14.

I've also change to 2 wire connection and it still didn't solve the issue.

Did I missed some steps when using the MSP-FET(maybe not configure right)? In addition, is there any software tool could allow MSP-FET to detect the device before programming? I remember the old Spectrum Digital Programmer could see the chips before burning in the firmware.

The waveform below shows the communication waveform.

yellow(TDO/TDI), blue (TDI/VPP), purple (TMS), green(TCK).

Thanks,

over 8 years ago

0 Sean Huang15 over 8 years ago

TI__Expert 4215 points

Hi,

In CCS project options, have you selected the correct chip? Additionally, check that the cap on RST is not larger than 2.2nF. The device can also be resetting constantly due to bad code or the WDT timeout issue, in which case, a mass erase using the BSL is needed.

I would use the MSP Flasher to test connection with the device.
www.ti.com/.../msp430-flasher

Hope this information helps you solve the connection issue.

Sincerely,
Sean

0 SIlverwolfman over 8 years ago in reply to Sean Huang15

Intellectual 340 points

Hi Sean,

Thank you for the reply.
I double checked the chip selection, the cap and the resistor configuration, they seems correct. I'll try to see if the flasher program will give more information for debugging.
In the mean time, I captured waveform while connect to the MSP430FR5726, attached to the original post. It appears that only 2 wires are using for communication(TDI/VPP and TCK), TDI/TDO and TMS stays high during the whole process, Is this the correct communication waveform? I am a little confused, In my understanding, even when using the 2 wire connection, the wire suppose to be TDI/TDO and TCK.

Thank you for the help!

Best Regards,

0 Sean Huang15 over 8 years ago in reply to SIlverwolfman

TI__Expert 4215 points

Hi,

It does seem like TDO/TDI and TCK are having connection issues according to your oscilloscope readout for the 4-wire JTAG configuration, I will further look into it.

Sincerely,
Sean

0 SIlverwolfman over 8 years ago in reply to Sean Huang15

Intellectual 340 points

Hi,

I've used the software, and it can't detect the device as well. I try connecting the MSP-FET to the other chip MSP430G2553 on the launchpad, while the jumper from on-board emulator is removed. and got the error message indicating the voltage for FET is not correct.

0 Sean Huang15 over 8 years ago in reply to SIlverwolfman

TI__Expert 4215 points

How are you connecting the FET to the G2 Launchpad? There's not a JTAG port available.

Sincerely,
Sean

0 SIlverwolfman over 8 years ago in reply to Sean Huang15

Intellectual 340 points

I referred to the schematic of G2 launchpad and used the 4 wire connection for MSP-FET, there is a 47K pull up resistor and 1nF Cap on Pin16 already, so I directly connected to Rst pin on FET. TDO/TDI to pin 1.7, TDI/Vpp to pin 1.6, TMS pin1.5, TCK pin 1.4.

0 Sean Huang15 over 8 years ago in reply to SIlverwolfman

TI__Expert 4215 points

Hi,

Could you use the following MSP-TS430RHA40A target board with the MSP430FR5726 and confirm the connections?
www.ti.com/.../msp-ts430rha40a

Sincerely,
Sean

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MSP-FET issue.