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Mikrovezérlő

Stepper Motor Driver

2010, december 11 - 17:04 — Jung Ervin 

/*==============================================================================
   stepper_motor.h  (tested on MINIANGLE STEPPER MOTOR 5V/1A and L298 IC)
 
   Bidirectional Stepper Motor Driver for Small Device C Compiler
   Written by Ervin Jung (2010)

HOPE RF12 FSK Transceiver Library

2010, szeptember 11 - 16:16 — Jung Ervin 

/*==============================================================================
   rf12.h
 
   HOPE RF12 FSK Transceiver Library 
   Written by Ervin Jung (2010)
 
   Based on: HOPE RF, RF12B programming guide
--------------------------------------------------------------------------------
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version.

Led villogó megszakítással

2010, augusztus 25 - 18:32 — Jung Ervin

main.c

//==============================================================================
// example: Led flasher by Interrupts
// Written by Ervin Jung (2010)
//==============================================================================
 
#include "main.h"
#include <simple_delay.h>
 
char led2_state = 0;
char led1_state = 0;
 
// 5,461 ms
SIGHANDLER(timer0_handler) {
  LATDbits.LATD3 = led2_state;
  led2_state = !led2_state; 
  INTCONbits.TMR0IF = 0;
}
 
// 5,461 ms
SIGHANDLER(timer2_handler) {
  LATDbits.LATD2 = led1_state;
  led1_state = !led1_state;

Bootloader használata

2010, augusztus 23 - 17:31 — Jung Ervin
Bootloader settings

A bootloader használatához szükségesek a megfelelően előkészített startup kódok, attól függően melyiket kívánjuk használni. Ezek a kódok a crt0.c, crt0i.c és a crt0iz.c fájlokban vannak. Illetve szükséges még a megfelelően megszerkesztett Linker Script és a megfelelő compiler és linker opciók beállítása is.

Példaként nézzük a crt0i.c tartalmának egy döntő részletét, ami alapesetben a reset vektort a 0x0000 címre helyezi:

/*
 * entry function, placed at interrupt vector 0 (RESET)
 */
void _entry (void) __naked __interrupt 0
{
  __asm
    goto    __startup

HD44780 LCD egyedi karakterek

2010, augusztus 4 - 18:22 — Jung Ervin

Példaprogram egyéni karakterek létrehozására és használatra.

/*==============================================================================
   Custom Charcters
   Written by Ervin Jung (2010)
 
   You can find more infromations in the lcd.h
==============================================================================*/
#include <pic18fregs.h>
 
#define  FOSC 48000000     // because PPL5 
#define  LCD_USE_DEFAULTS
#include <simple_delay.h>
#include <lcd.h>
#include <math.h>
#include <stdlib.h>

LCD_Custom_Char LCD_Custom_Char

ADC konfigurálás

2010, augusztus 1 - 21:43 — Jung Ervin

Elkészült az ADC-átalakító támogatása, illetve az Usart Terminálba bekerült egy ADC monitor, amivel feldogozható két ADC érték.

Egy példaprogram a használathoz:

while (1) {
    usart_putc(1); //Begin
    printf("ADC0=%u\r\n", adc_read(ADC_CHN_0)); 
    printf("ADC1=%u\r\n", adc_read(ADC_CHN_1)); 
    usart_putc(4); //End 
    delay_ms(500);
  }

ADCConfig Usart_Terminal_ADC

AD Converter

2010, augusztus 1 - 18:18 — Jung Ervin 

/*==============================================================================
   analog.h optimized for IDE for PIC18F
 
   devices: pic18f2455, pic18f2550,pic18f4455, pic18f4550
 
   Written by Ervin Jung (2010)
 
--------------------------------------------------------------------------------
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version.

Timers

2010, július 30 - 14:16 — Jung Ervin 

/*==============================================================================
   timers.h optimized for IDE for PIC18F
 
   Written by Ervin Jung (2010)
 
--------------------------------------------------------------------------------
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version.
 
   This program is distributed in the hope that it will be useful,

Default config for PIC18F4550 20 Mhz (48 Mhz)

2010, július 22 - 17:26 — Jung Ervin 

#define FOSC 48000000 
 
code char at __CONFIG1L config1l = 0xff & _PLLDIV_DIVIDE_BY_5__20MHZ_INPUT__1L & _CPUDIV__OSC1_OSC2_SRC___1__96MHZ_PLL_SRC___2__1L & _USBPLL_CLOCK_SRC_FROM_96MHZ_PLL_2_1L;
code char at __CONFIG1H config1h = 0xff & _OSC_HS__HS_PLL__USB_HS_1H & _FCMEN_OFF_1H & _IESO_OFF_1H;
code char at __CONFIG2L config2l = 0xff & _PUT_ON_2L & _BODEN_ON_2L & _BODENV_2_0V_2L & _VREGEN_ON_2L;
code char at __CONFIG2H config2h = 0xff & _WDT_DISABLED_CONTROLLED_2H & _WDTPS_1_32768_2H;

Simple delay functions

2010, július 20 - 20:51 — Jung Ervin 

/*==============================================================================
   simple_delay.h
 
   simple delay functions  
   Written by Ervin Jung (2010)
 
--------------------------------------------------------------------------------
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 2, or (at your option) any
   later version.
 
   This program is distributed in the hope that it will be useful,

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