Hello,
I am in trouble with MSP-EXP432P401R Launchpad UART module when evaluating the board uart capabilities with the CCS - DriverLib example:uart_pc_echo_12mhz_brclk.
To keep everything simple, on MSP side I have not made any modification on the example code. In LabVIEW using Example finder with keywords "Serial" the vi named: "Basic Serial Write and Read.vi" you can find the host VI for test.
My problem is: The elapsed time between sending a byte to the MSP UART and receiving a byte takes too long. In the above example, it takes 150 ms to get a reply from MSP432.
I have tried the following:
- Changing the USB ports (type 2.0 | type 3.0)
- MCLK speed, UART speed
- Changed the MSP432 launchpad and the Host PC too
without any success.
The problem: It takes 150ms to get a first character from the MSP since I write into it. After the first byte arrived to host, all the remaining data can transfer fast and smooth it there are.
Later on, I have repeated the test with .NET based Serial Host application but nothing changed.
Here is my original thread from TI Forum: https://e2e.ti.com/support/microcontrollers/msp430/f/166/t/417262
Unfortunately, I have not received any useful reply for almost a week. Could you help me to handle this issue? Thank you so much!