Blinking the PIC16F887 in MikroC

Starting to program a micro-controller is usually writing a code with blinking an LED to make sure that the introductory coding works correctly. Most of embedded C compiler makes a ready to use examples include all the features of their compiler and the target MCU.

However I make an easy beginning to code the PIC16F887 8-bit MCU with MikroC for PIC. A free version of this compiler offers a free firmware building of the coding size that does not exceed 2 Kb of MCU program memory.

Using  PORTD of the PIC16F887, the CPU regularly toggle pin RD0 for every one second. The delay_ms() function of the MikroC create an acceptable delay time in milli-seconds. 

#define LED PORTD.RD0   // LED IS AT RD0
#define rate  1000      // rate is 1000ms
 
void main() {
     LED=0;        // CLEAR LED
     TRISD=0x00;    // PORTD AS OUTPUT
     while (1)
     {
           LED=0;              // LED OFF
           delay_ms(rate);   // wait for 1000ms
           LED=1;            // LED ON
           delay_ms(rate);   // wait for 1000ms
     }
}

The input parameter to the delay_ms() function is a unsigned long data type. However it is a constant rather than a variable.

Schematic Diagram