CCS/MSP430FR5994: eUSCI transmit interrupt when PC tries to read data

Tool/software: Code Composer Studio

Hello everyone,

I am using the MSP together with an FTDI cable to try to transmit and receive data from the MSP to the PC with python. The "main" script should be the python script, where I want to send some data to the MSP, who has to do some stuff and then send data back.

I successfully received and transmitted data between the two interfaces. But until now I cannot do both - receive and then transmit. So the question is:

1. Do I need an exact timing to read out from the MSP, so that the data is ready when my python code reaches the read part? Meaning delay the python code until I think the MSP is finished with its calculations?

2. Or does the MSP feature a possibility to create an interrupt when the computer tries to read data over UART?

For better understanding just a raw idea what I want to do:

Python Code

import serial
ser = serial.Serial('/dev/ttyUSB0')

#do some stuff and generate data to send to MSP
ser.write(data_raw) #and then do some stuff on the MSP

#wait until MSP is finished? or directly read and MSP handles it like an interrupt and transmits data whenever it is ready?
data_processed = ser.read()

I hope you understand what I mean.

Kind regards, LS