STM8 MCU LED Blinking Sample Code

STM8S103K3 LED Blinking Sample Code:

Example 1:

#include "stm8s.h"

#define LED_GPIO_PORT (GPIOC) //Port configuration may be vary. Please check.
#define LED_GPIO_PINS (GPIO_PIN_3 | GPIO_PIN_2 | GPIO_PIN_1 | GPIO_PIN_0)

void delay(uint16_t myCount);

void main(void)
{

GPIO_Init(LED_GPIO_PORT, (GPIO_Pin_TypeDef)LED_GPIO_PINS, GPIO_MODE_OUT_PP_LOW_FAST);
while(1)
{
GPIO_WriteReverse(LED_GPIO_PORT, (GPIO_Pin_TypeDef)LED_GPIO_PINS);
delay(0xFFFF);
}
}

void delay(uint16_t myCount)
{
while(myCount != 0)
{
myCount--;
}
}

#ifdef USE_FULL_ASSERT

void assert_failed(uint8_t* file, uint32_t line)
{
while(1)
{}
}
#endif

Example 2:

#include "stm8s.h"

#include "STM8S003K3.h"

void myDelay(void);

void myDelay()

{

   int i, j;

   for(i=0; i<1000; i++)

   {

       for(j=0; j<100; j++);    

   }  

}   

int main()

{

    // Configure pins (Port/Pin number may be vary)

    PC_DDR = 0x17;

    PC_CR1 = 0x17;

// Loop

while(1)

{

           PC_ODR ^= 0x17;

           myDelay();

}

}

How to find factorial of a given number in C Language

C Program for factorial without recursion:

#include<stdio.h>
//Main funtion
void main()
{
int num, factorial;
num = 5; factorial = 1;

while(num >= 2)
{
if(num <= 1)
{ break; }
else
{ factorial = factorial * num; }
--num;
}
printf("factorrial of given number is = %d", factorial);
}

C Program for factorial with recursion:

#include<stdio.h>

//Funtion that calculate factorial using recursion
int factorial(int n)
{
return(n<=1 ? 1 : n*factorial(n-1));
}

//Main funtion that calls factorial function
void main()
{
int x = 5;
printf("factorrial of given number is = %d", factorial(x));
}

How to write a low level file copy program in C Language

Low Level File Copy Program:

#include "fcntl.h"
#include "types.h"
#include "stat.h"
main(int argc, char *argv[])
{
char buffer[512];
int in, out, bytes;
in = open(argv[1], O_RDONLY|O_BINARY);
if (in == -1)
{
puts("Cannot open file");
exit();
}
out = open(argv[2], O_CREATE|O_WRONLY|O_BINARY|S_IWRITE);
if(out == -1)
{
puts("Cannot open file");
exit();
}
while(1)
{
bytes = read(in, out, 512);
if (bytes > 0)
{
write(out, buffer, bytes);
}
else
{
break;
}
}
close(in);
close(out);
}

How to find GCD of two numbers in C Language

C Program for GCD of Two Numbers:

#include<stdio.h>
void main()
{
int x, y;
x = 12; y = 18;

while(x != y)
{
if(x > y)
x = x - y;
else
y = y - x;
}

printf("GCD of x and y is = %d", x);
}

How to find LCM of two numbers in C Language

C Program for LCM of Two Numbers:

#include<stdio.h>
void main()
{
int x, y, LCM;
x = 4; y = 9; LCM =1;

for(;;)
{
if(LCM % x != 0 || LCM % y != 0)
++LCM;
else
break;
}

printf("LCM of x and y is = %d", LCM);
}

How to swap two numbers in C Language

Using Two Variable:

Program 1:

#include<stdio.h>
#define SWAP(a,b) (a)^=(b)^=(a)^=(b)
void main()
{
int a,b;
a=12; b=17;
SWAP(a,b);
printf("a=%i,b=%i",a,b);
}

Program 2:

#include<stdio.h>
void main()
{
int a,b;
a=12; b=17;
a=a+b;
b=a-b;
a=a-b;
printf("a=%i,b=%i",a,b);
}

Using Third Variable:

#include<stdio.h>
void main()
{
int a,b,temp;
a=12; b=17; temp=0;
temp=a;
a=b;
b=temp;
printf("a=%i,b=%i",a,b);
}

How to print "Hello World" without using semicolon in main?

There are number of ways you can do it.

First Way:

#include<stdio.h>
void main()
{
if (printf("Hello World")) {}
}

Second Way:

#include<stdio.h>
void main()
{
while(!printf("Hello World")) {}
}

Third Way:

#include<stdio.h>
void main()
{
switch(printf("Hello World")) {}
}

Fourth Way:

#include<stdio.h>

#define PRINT printf("Hello World")

void main()

{

if(PRINT) {}

}