Why serial communication is needed in Embedded C - See It in Action

Why Serial Communication is Needed

📖 Scenario: You are working on a small embedded system project where two devices need to exchange data. One device is a microcontroller, and the other is a sensor module. To make them talk to each other, you need to use serial communication.

🎯 Goal: Understand why serial communication is needed by creating a simple program that sets up data to send and receive using serial communication concepts.

📋 What You'll Learn

Create a variable to hold data to send

Create a variable to hold received data

Set a baud rate configuration variable

Simulate sending data using a function

Print the received data

💡 Why This Matters

🌍 Real World

Serial communication is used in embedded systems to connect sensors, displays, and other modules with microcontrollers using minimal wiring.

💼 Career

Understanding serial communication is essential for embedded engineers to design and debug hardware interfaces and communication protocols.

1

DATA SETUP: Create data variables

Create a char array called dataToSend with the value "Hello" and a char variable called receivedData initialized to '\0'.

Embedded C

# Create dataToSend and receivedData variables
// Your code here

Need a hint?

Use a character array for the data to send and a char variable for received data.

2

CONFIGURATION: Set baud rate

Create an int variable called baudRate and set it to 9600.

Embedded C

char dataToSend[] = "Hello";
char receivedData = '\0';
// Set baudRate to 9600
// Your code here

Need a hint?

Baud rate is the speed of serial communication. Use an integer variable.

3

CORE LOGIC: Simulate sending and receiving data

Write a function called sendData that takes a char* parameter called data and sets receivedData to the first character of data. Then call sendData with dataToSend.

Embedded C

char dataToSend[] = "Hello";
char receivedData = '\0';
int baudRate = 9600;
// Write sendData function and call it
// Your code here

Need a hint?

Simulate sending by copying the first character from dataToSend to receivedData.

4

OUTPUT: Print the received data

Write a printf statement to print receivedData as a character.

Embedded C

#include 

char dataToSend[] = "Hello";
char receivedData = '\0';
int baudRate = 9600;

void sendData(char* data) {
    receivedData = data[0];
}

int main() {
    sendData(dataToSend);
    // Print receivedData
    // Your code here
    return 0;
}

Need a hint?

Use printf("Received data: %c\n", receivedData); to show the received character.