MSP432P401R - C# Serial Communication Problem

James Evans said:

Hi,

First, welcome to E2E and thanks for providing your code.

For simulating the "aci" integer being sent from your C# application, I just used a Tera Term terminal (COM5, 9600 baud rate). After calling the "serialEvent()" function from inside the "loop()" function, I was able to read the integer (1000, 2000, etc.) that was entered in the terminal.

This should fix your communication problem. Below, I've attached my code and a screenshot of the terminal for your reference.

#include <Servo.h> // Include servo library

Servo servoEks6, servoEks5, servoEks4, servoEks3, servoEks2, servoEks1; // Declare servos

int aci;
int servo=0;

void setup() {  
  
 // Setup the serial interface
 Serial.begin(9600);
 
 // Attach the servos to specific pins on MSP432
 servoEks1.attach(8);   // Attach to pin 8,  selected by entering 1000 in terminal
 servoEks2.attach(9);   // Attach to pin 9,  selected by entering 2000 in terminal
 servoEks3.attach(10);  // Attach to pin 10, selected by entering 3000 in terminal
 servoEks4.attach(11);  // Attach to pin 11, selected by entering 4000 in terminal
 servoEks5.attach(12);  // Attach to pin 12, selected by entering 5000 in terminal
 servoEks6.attach(13);  // Attach to pin 13, selected by entering 6000 in terminal

  // Initialize the servos
  servoEks1.write(90);
  servoEks2.write(10); 
  servoEks3.write(110); 
  servoEks4.write(60); 
  servoEks5.write(90); 
  servoEks6.write(30); 
}

void loop() {
  
  // Put your main code here, to run repeatedly:
  serialEvent();
}

void serialEvent() {
  
  // Determine if a value has been entered in the terminal
  if (Serial.available() > 0) {
    
    // Read the incoming integer
    aci = Serial.parseInt();
    
    // Print the received integer for confirmation
    Serial.print(" I received the following integer: ");
    Serial.print(aci, DEC);
    
    // Identify and configure the servos
    servo = aci/1000;
    aci = aci % 1000;
    
    if(aci!=0) {
      if(servo==1) {
        servoEks1.write(aci);
      }
      
      else if(servo==2) {
        servoEks2.write(aci);
      }
      
      else if(servo==3) {
        servoEks3.write(aci);
      }
      
      else if(servo==4) {
        servoEks4.write(aci);
      }

      else if(servo==5) {
        servoEks5.write(aci);
      }
      
      else if(servo==6) {
        servoEks6.write(aci);
      }      
    }
  }
}

Also, here are some valuable resources related to using serial communication with Energia:

http://energia.nu/Serial.html

http://energia.nu/Serial_Read.html

http://energia.nu/Tutorial_SerialEvent.html

Regards,

James

MSP Customer Applications

Firstly, thank you for help. 

Program worked smoothly. But there is one small problem. For example;

- Servo motors is giving late response ( ~0.5 s),  jump occurs. No similar problems in Arduino. Maybe because of baud rate? (MSP432=9600, Arduino=115200)

Regards

Eren