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• MSP430 C++ Hello World MSP430G2553

  Marius Taciuc • 05/03/2018 at 04:25 • 0 comments

  MSP430G2553 programming with a Hello World code. C++ on IAR Embedded Workbench. 

  Code here:

  // Basic MSP430 Hello World 

  #include "msp430G2553.h"

  #define G_LED BIT6
  #define R_LED BIT0

  int i,j,delay;

  void delay_time(int);
  void delay_long(int);

  void main(void){
  WDTCTL = WDTPW + WDTHOLD; // disable watch dog timer
  DCOCTL = CALDCO_16MHZ;    // set internal oscillator at 16MHz
  BCSCTL1 = CALBC1_16MHZ;   // set internal oscillator at 16MHz

  P1OUT = 0x00;
  P2OUT = 0x00;
  P1DIR = 0xFF; // Set all as outputs
  P2DIR = 0xFF; // Set all as outputs

      for(;;) {
                   
         
      P1OUT |= G_LED;      // Enable = 1                  
      delay_long(delay); 
      P1OUT &= ~(G_LED);   // Disable = 0   
      delay_long(delay);                                  
      }                                 
  }

  //----------------------------------------------------------------------------------------------------------------------------------
  //-----------------  Functions & Procedures  -----------  Functions & Procedures  -----------  Functions & Procedures  -------------
  //----------------------------------------------------------------------------------------------------------------------------------

  void delay_time (int delay){      //----------------------------------------- Delay---------------------
        
       do delay--;
       while (delay != 0);
  }

  void delay_long (int){            //--------------------------------------- Delay long------------------

              int j;                   
              j = 100;
           do{ 
              delay_time(5000);
           j--;
           }while (j != 0); 
  }

• ASM Hello World Program for PIC16F628 / PIC16F819

  Marius Taciuc • 05/02/2018 at 05:51 • 0 comments

  Programming a PIC16F628 microcontroller using MPLABX and PICkit3 - A Hello World Program demonstrating the basic principles of writing a piece of ASM code. The LEDs on the PORTB are lighting up according to some pressed buttons on the PORTA used as an input here.

  For details about the hardware used in this video, refer to the following website: www.funelectronicstoday.com

  The result code, in case you want to copy-paste it:

  ; Hello world basic 16F628 ASM program
   
   RESET CODE 0x00
   #INCLUDE P16F628A.inc ; put angle brackets here
   __CONFIG _HS_OSC & _CP_OFF & _LVP_OFF & _BODEN_OFF & _MCLRE_ON & _PWRTE_OFF & _WDT_OFF 
   
   ; THIS PROGRAM WAS DESIGNED FOR 20 MHZ OSC
   ;------------------------------------
   ;_XT_OSC             : EXTERNAL 4MHZ
   ;_HS_OSC             : EXTERNAL 20MHZ
   ;_INTRC_OSC_NOCLKOUT : INTERNAL 4MHZ
   ;------------------------------------
   
   CBLOCK 0X20 ; THIS IS HOW YOU DECLARE A BLOCK OF VARIABLES
      NVAR1, NVAR2
   ENDC
   
   CLRF PORTA ;SET THESE PINS BEFORE YOU ACTUALLY CONFIGURE THEM
   CLRF PORTB
   
   MOVLW 0X07    ; DISABLE THE COMPARATORS AND ENABLING THE PINS FOR
   MOVWF CMCON   ; FUNCTIONING AS I-O

   
   
   
   
   
   BCF STATUS, RP1 ;SETS BANK1
   BSF STATUS, RP0 ;
   
   MOVLW B'00111111' ;SET PINS 0 - 4 AS INPUTS ; TRIS 5 AS 1 ALWAYS  
   MOVWF TRISA 
   
   MOVLW 0X00 ;SET PINS 0 - 7 AS OUTPUTS
   MOVWF TRISB 
   
   BCF STATUS, RP1 ;SETS BANK1
   BCF STATUS, RP0 ;
   
   
  ;MAIN LOOP----------------

  REPEAT
   
   MOVFW PORTA
   MOVWF NVAR1
   
   MOVFW NVAR1
   MOVWF PORTB
   
   GOTO REPEAT ; END OF MAIN LOOP 
   
   END

• Delay loop code in ASM PIC16F628 / PIC16F819

  Marius Taciuc • 05/02/2018 at 05:46 • 0 comments

  In the previous videos I've been explaining how to initialize the ports of the PIC16f628 microcontroller. This other video shows how to write a delay loop and blink some LEDs for fun. The code of the main loop and of the delay loop is listed below in case you want to copy-paste it:  Check also funelectronicstoday.com for more fun projects.

  ;MAIN LOOP----------------

  REPEAT
      MOVLW 0X00
      MOVWF PORTB
      CALL DELAY 
   
      MOVLW 0X01
      MOVWF PORTB
      CALL DELAY
      
      MOVLW 0X02
      MOVWF PORTB
      CALL DELAY
      
      MOVLW 0X04
      MOVWF PORTB
      CALL DELAY
      
      MOVLW 0X08
      MOVWF PORTB
      CALL DELAY
      
      CLRF PORTB 
      
      CALL DELAY

       
   
   GOTO REPEAT ; END OF MAIN LOOP 
   

  DELAY
   CLRF DELAY1
   CLRF DELAY2

  DELAYLOOP 
   DECFSZ DELAY2,F
   GOTO DELAYLOOP
   
   DECFSZ DELAY1,F
   GOTO DELAYLOOP
   
   
   RETURN

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