Other Parts Discussed in Thread: EVM430-F6779,
Hello,
I am using a EVM430-F6779 - 3 Phase Electronic Watt-Hour EVM for Metering and also I designed a custom board based on this evaluation board.
I tried to communicate the evaluation board with the computer using the old e-meter GUI and library that is based in IAR. Communication works well: Both TX and RX have signals (There are not phases connected during this test, I powered the evaluation board using the DGND and DVCC pins)
When I upload this firmware to the MSP430 of my custom board, it also works well:
After checking my custom board can communicate with the the old firmware and the old GUI, I upload the firmware using the MSP Energy Measurement Design Center Guide to the evaluation board:
Checking the signals I can detect when the software sends the signal to start send information to the PC. Also, I can detect all the bytes that are sent to the computer.
Now, when I try to program the firmware to my custom board, I cannot detect the MSP:
When I check the signals, I can see how the TX signal arrives to the MSP, but it does not answer:
My initial thoughts were my schematic was wrong, but if the old GUI can work, it means the MSP has TX/RX connection well, and means I can flash the program well. Also, i check the same firmware with both MSP. Both of them has the same reference: MSP430F67791A
I searched if I did some mistake deleting an important connection:
Am I doing something wrong with the firmware or the schematic is wrong?
Thanks,
David