#include <stdint.h>
#include <stdbool.h>
#include "tm4c123gh6pm.h" // Include the header file for the specific microcontroller

void UART0_Init(void);
void UART0_Transmit(char data);
void UART0_TransmitString(const char *str);

int main(void) {
    UART0_Init(); // Initialize UART0

    const char myString[] = "Hello, World!";
    UART0_TransmitString(myString); // Transmit the string

    while (1) {
        // Main loop
    }

    return 0;
}

void UART0_Init(void) {
    SYSCTL_RCGCUART_R |= 0x01; // Enable UART0
    SYSCTL_RCGCGPIO_R |= 0x01; // Enable port A

    UART0_CTL_R &= ~0x01; // Disable UART0

    UART0_IBRD_R = 104; // 16 MHz / (16 * 9600) = 104.1667
    UART0_FBRD_R = 11;  // Fraction part, round(0.1667 * 64) = 11

    UART0_LCRH_R = (0x3 << 5); // 8-bit, no parity, 1-stop bit
    UART0_CTL_R = 0x301;       // Enable UART0, TXE, RXE

    GPIO_PORTA_AFSEL_R |= 0x03; // Enable alternate functions on PA0 and PA1
    GPIO_PORTA_PCTL_R = (GPIO_PORTA_PCTL_R & 0xFFFFFF00) + 0x00000011;
    GPIO_PORTA_DEN_R |= 0x03; // Enable digital on PA0 and PA1
}

void UART0_Transmit(char data) {
    while ((UART0_FR_R & 0x20) != 0); // Wait until the transmitter is not full
    UART0_DR_R = data;                // Transmit the character
}

void UART0_TransmitString(const char *str) {
    while (*str) {
        UART0_Transmit(*str++);
by

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Read inputs from stdin

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#include <stdio.h>
int main()
{
    char name[50];
    printf("Enter name:");
    scanf("%s", name);
    printf("Hello %s \n" , name );
    return 0;
    
}

About C

C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.

Key features:

  • Structured Programming
  • Popular system programming language
  • UNIX, MySQL and Oracle are completely written in C.
  • Supports variety of platforms
  • Efficient and also handle low-level activities.
  • As fast as assembly language and hence used as system development language.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition if-else is used.

if(conditional-expression) {
   // code
} else {
   // code
}

You can also use if-else for nested Ifs and if-else-if ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to if-else-if ladder.

switch(conditional-expression) {    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
...    
    
default:     
 // code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  // code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while(condition) {  
 // code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {
  // code 
} while (condition);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

One dimentional Array:

data-type array-name[size];

Two dimensional array:

data-type array-name[size][size];

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

Two types of functions are present in C

  1. Library Functions:

Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,

  1. User defined functions:

User defined functions are the ones which are written by the programmer based on the requirement.

How to declare a Function

return_type function_name(parameters);

How to call a Function

function_name (parameters)

How to define a Function

return_type function_name(parameters) {  
  //code
}