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UART Communication between Arduino and MSP430F5529


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Dear Developers,

I want to send data from MSP430F5529 to my Arduino Nano through UART connection. But somehow it is not working filne. I have used voltage devider circuit to convert Arduino's 5V to MSP's 3.3V. 

Connection

Arduino's RX -> MSP's TX

Arduino's TX -> MSP's RX

Ground of Both -> ground of voltage devicer.

Code of Arduino :

const int chipSelect = 10;

String inByte = " ";
void setup() {
  // initialize both serial ports:
  Serial.begin(9600);

}

void loop() {
  if(Serial.available())
 {
    char b = Serial.read();
    Serial.println(b);
  }
  
  delay(50);
}

Code of MSP430F5529

void setup() {

  Serial.begin(9600);
}

void loop() {
  Serial.write("Hii");

  delay(50);
}

Please Help me.

Thank you.

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9 minutes ago, hemangjoshi37a said:

From Arduino's Serial terminal I should get "Hii" message

How? Your Arduino is connected to the MSP board. Is it connected to the PC in the same time? I don't think you can share the U(S)ART link in this way.

When you check it with the oscilloscope, is the MSP board connected to the Arduino/PC, or alone?

 

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Arduino is connected to PC through USB cable and to MSP through TX/RX Pins. (to both at same time.)

But When I  transmit anything through Arduino, It shows on oscilloscope as well as on serial terminal. Why so?? So that in arduino we can intercept the serial signal and in MSP we cant. right??

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So what is this?? solution ??

6 minutes ago, LiviuM said:

Arduino -> PC & MSP: one output TX (arduino) "speaking" to two inputs (RX PC & RX MSP)

Arduino <- PC & MSP: two outputs (TX PC & TX MSP) trying to drive in the same time different logic levels on the same line (RX Arduino).

 

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look man just forget about connection to PC, because arduino and MSP both are connected to PC through USB cable, Not using RS232 connection.

And very basic question is why MSP is not able to develop any signal on TX pin while I am transmitting some data. however Arduino generates signal on TX pin when I try to transmit some data using same code.

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