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CCS/TMS570LC4357: SCI/UART Testing

Shivam Kakad
Expert 1355 points

Part Number: TMS570LC4357

Tool/software: Code Composer Studio

Hello,

For the TMS570LC4357, I am trying to establish the communication. So for the testing, I have configured the SCI1 module which is muxed with the LIN1. 

As far as the connections are considered, I have connected the HDK via 100v2 USB to the PC. and The CRO probes are connected to the B7 i.e. LINTX pin.

Now in the code I have configured SCI1 as: BaudRate=9600, no parity, 2 stop bits and I am transmiting following data continuously:

uint8_t sci_tx[10] = {1,2,3,4,5,6,7,8,9,10};

But in the Oscilloscope i can see the continuous high pulse for his LINTX pin.

So, is it expected to get the coontinuous high pulse on the Tx pin or i should have supposed to get the data on oscilloscope(in different pulses format)?

I verified the LIN1\SCI1 transmit buffer for the transmitted data, so it is not having an issue as such. it is properly receiving the data.

Can anyone please help me about this behaviour?

Regards,

Shivam Kakad