Balogh na 21:49, 6. november 2008

2008-11-06T21:49:08Z

← Staršia verzia		Verzia z 21:49, 6. november 2008
Riadok 110:		Riadok 110:
	</source>		</source>

	[[Category:AVR~~,CADRS~~]]		[[Category:AVR]][[Category:CAD_RS]]

Balogh na 21:47, 6. november 2008

2008-11-06T21:47:03Z

← Staršia verzia		Verzia z 21:47, 6. november 2008
Riadok 109:		Riadok 109:
	}		}
	</source>		</source>

			[[Category:AVR,CADRS]]

Balogh: Nová stránka: //***************************************************************************** // File Name : basiciotest.c // // Title : example usage of basic input and output...

2008-11-05T11:03:09Z

Nová stránka: <source lang="c"> //***************************************************************************** // File Name : basiciotest.c // // Title : example usage of basic input and output...

Nová stránka

<source lang="c">
//*****************************************************************************
// File Name : basiciotest.c
//
// Title : example usage of basic input and output functions on the AVR
// Revision : 1.0
// Notes :
// Target MCU : Atmel AVR series
// Editor Tabs : 4
//
// Revision History:
// When Who Description of change
// ----------- ----------- -----------------------
// 18-Nov-2005 balogh Created the program
//*****************************************************************************

//----- Include Files ---------------------------------------------------------
#include <avr/io.h> // include I/O definitions (port names, pin names, etc)
#include <avr/signal.h> // include "signal" names (interrupt names)
#include <avr/interrupt.h> // include interrupt support

#include "global.h" // include our global settings

#define LED1 PINB0 // .equ LED1 =PINB0
#define LED2 PINB1 // .equ LED2 =PINB1

// PINB0 je v atmega16.h je zadefinovany ako cislo 0
// Takze ma zmysel sbi(PORTB,LED0);

// Naopak, toto nema zmysel, dosadi sa 3.
// #define SW1 PINB3
// Spravne ma byt:
#define SW1 bit_is_clear(PINB, 3) // .equ SW1 =PINB3
#define SW2 bit_is_clear(PINB, 4) // .equ SW2 =PINB4

//----- Zaciatok programu ------------------------------------------------------------
int main(void)
{
// All AVR processors have I/O ports which each contain up to 8
// user-controllable pins. From a hardware perspective, these I/O pins
// are each an actual physical pin coming out of the processor chip.
// The voltage on the pins can be sensed or controlled via software,
// hence their designation as Input/Output pins.

// While I/O pins are actual wires in the real world, they also exist
// inside the processor as special memory locations called registers.
// The software-controlled contents of these registers is what
// determines the state and operation of I/O pins and I/O ports.

// Since AVR processors deal naturally with 8 bits at a time, I/O pins
// are grouped into sets of 8 to form I/O ports. Three registers
// are assigned to each I/O port to control the function and state of
// that port's pins. The registers are 8-bits wide, and each bit (#0-7)
// determines the operation of the corresponding number pin (pin 0-7).
// The three registers are:

// DDRx - this register determines the direction (input/output) of the pins on port[x]
// A '0' bit in the DDR makes that port pin act as input
// A '1' bit in the DDR makes that port pin act as output

// PORTx - this register contains the output state of the pins on port[x]
// A '0' bit makes the port pin output a LOW (~0V)
// A '1' bit makes the port pin output a HIGH (~5V)

// PINx - this register contains the input state of the pins on port[x]
// A '0' bit indicates that the port pin is LOW (at ~0V)
// A '1' bit indicates that the port pin is HIGH (at ~5V)

// The x should be replaced with A,B,C,D,E,F, or G depending on the
// desired port. Note that not all AVR processors have the same set
// or number of ports. Consult the datasheet for your specific processor
// to find out which ports it has.

// in the AVR-GCC C language, ports can be accessed using two kinds of
// commands:
// inb() and outb() - in-byte and out-byte
// cbi() and sbi() - clear-bit and set-bit

// inb() and outb() should be used when you intend to read or write
// several bits of a register at once. Here are some examples:

unsigned char TMP; // .def TMP =r16
// Vystup na port ma obratene poradie: outp(hodnota, port);
// Pri pouziti AVRlib je mozne pouzit "logickejsiu" outb:
// outb(DDRB, 0x18); // set some of port B pins to input
// okrem toho v C sa neda pouzit binarna hodnota, len oct, dec a hex
outb(DDRB,0x018); // ldi TMP,0b00011000 ;nastav vstupy a vystupy
// out DDRB,TMP
outb(PORTB,0x0F0); // ldi TMP,0x0F0 ; zhasni LED
// out PORTB,TMP ; zapis na port

do // rjmp LOOP ; dokola
{
if (SW1) // sbis PINB,SW1 ; obskoc ak je stlacene tlacitko
{cbi(PORTB,LED1); // rcall LED1_ON
sbi(PORTB,LED2);
}
if (SW2) // sbis PINB,SW2 ; obskoc ak je stlacene tlacitko
{
cbi(PORTB,LED2); // rcall LED2_ON
sbi(PORTB,LED1);
}
} while (1);

return 0;
}
</source>

Program AVR03 - História úprav

Balogh na 21:49, 6. november 2008

Balogh na 21:47, 6. november 2008

Balogh: Nová stránka: //***************************************************************************** // File Name : basiciotest.c // // Title : example usage of basic input and output...