Собрал типовую схему и прикрутил к ней atmega16.
Вот такой код поучился:
Код
/*****************************************************
This program was produced by the
CodeWizardAVR V2.05.0 Professional
Automatic Program Generator
© Copyright 1998-2010 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
Project :
Version :
Date : 12.02.2012
Author : NeVaDa
Company :
Comments:
Chip type : ATmega16
Program type : Application
AVR Core Clock frequency: 8,000000 MHz
Memory model : Small
External RAM size : 0
Data Stack size : 256
*****************************************************/
#include <mega16.h>
#include <delay.h>
#include <stdlib.h>
#include <string.h>
// Standard Input/Output functions
#include <stdio.h>
#define SetBit(reg, b) reg |= (1<<b)
#define ClearBit(reg, b) reg &= (~(1<<b))
#define InvBit(reg, b) reg ^= (1<<b)
#define BitIsSet(reg, b) ((reg & (1<<b)) != 0)
#define BitIsClear(reg, b) ((reg & (1<<b)) == 0)
#define SCK 7
#define MOSI 5
#define MISO 6
#define DRDY ((PIND & (1<<2)) != 0)
void Writetoreg (unsigned char byteword)
{
unsigned char i;
for (i=0;i<8;i++)
{
ClearBit(PORTB, MOSI); // DIN=0
ClearBit(PORTB,SCK); // Подаем синхроимпульс: SCLK=0
if (byteword & 0x80) SetBit(PORTB, MOSI);// Если выделенный бит =1, то DIN=1
byteword=byteword<<1; // Сдвигаем byteword на один разряд влево для выделения следующего бита
SetBit(PORTB,SCK); // SCLK=1
#asm("NOP");
};
};
unsigned int Read (void)
{
unsigned int tmp=0;
unsigned char i;
delay_ms(1);
for (i=0;i<16;i++)
{
ClearBit(PORTB,SCK); // SCLK=0 Подаем синхроимпульс
#asm("NOP");
SetBit(PORTB,SCK); // SCLK=1
tmp=tmp<<1; // Если DOUT=0, тогда просто сдвигаем tmp влево
if BitIsSet(PORTB, MISO) tmp=tmp+1; // Если DOUT=1 - тогда прибавляем еще единицу
};
return tmp; // Возвращаем 16-и разрядное слово
};
void INIT_ADC(void)
{
delay_ms(100);
Writetoreg (0b00010010);
delay_ms(100);
Writetoreg (0b01000110);
};
unsigned int ADC(void)
{
unsigned int V;
while DRDY;
Writetoreg(0b00111010);
V=Read();
return V;
};
// Declare your global variables here
void main(void)
{
// Declare your local variables here
unsigned char str[10];
unsigned int I;
// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;
// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;
// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;
// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x00;
// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;
// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;
// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;
// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;
// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: Off
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud Rate: 9600
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x33;
// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
// ADC initialization
// ADC disabled
ADCSRA=0x00;
// SPI initialization
// SPI disabled
SPCR=0x00;
// TWI initialization
// TWI disabled
TWCR=0x00;
DDRB|=(1<<7)|(1<<5);
//PORTB|=(1<<7);
INIT_ADC();
while (1)
{
// Place your code here
I=ADC();
UDR=I>>8;
delay_ms(10);
UDR=I;
delay_ms(1000);
}
}
This program was produced by the
CodeWizardAVR V2.05.0 Professional
Automatic Program Generator
© Copyright 1998-2010 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
Project :
Version :
Date : 12.02.2012
Author : NeVaDa
Company :
Comments:
Chip type : ATmega16
Program type : Application
AVR Core Clock frequency: 8,000000 MHz
Memory model : Small
External RAM size : 0
Data Stack size : 256
*****************************************************/
#include <mega16.h>
#include <delay.h>
#include <stdlib.h>
#include <string.h>
// Standard Input/Output functions
#include <stdio.h>
#define SetBit(reg, b) reg |= (1<<b)
#define ClearBit(reg, b) reg &= (~(1<<b))
#define InvBit(reg, b) reg ^= (1<<b)
#define BitIsSet(reg, b) ((reg & (1<<b)) != 0)
#define BitIsClear(reg, b) ((reg & (1<<b)) == 0)
#define SCK 7
#define MOSI 5
#define MISO 6
#define DRDY ((PIND & (1<<2)) != 0)
void Writetoreg (unsigned char byteword)
{
unsigned char i;
for (i=0;i<8;i++)
{
ClearBit(PORTB, MOSI); // DIN=0
ClearBit(PORTB,SCK); // Подаем синхроимпульс: SCLK=0
if (byteword & 0x80) SetBit(PORTB, MOSI);// Если выделенный бит =1, то DIN=1
byteword=byteword<<1; // Сдвигаем byteword на один разряд влево для выделения следующего бита
SetBit(PORTB,SCK); // SCLK=1
#asm("NOP");
};
};
unsigned int Read (void)
{
unsigned int tmp=0;
unsigned char i;
delay_ms(1);
for (i=0;i<16;i++)
{
ClearBit(PORTB,SCK); // SCLK=0 Подаем синхроимпульс
#asm("NOP");
SetBit(PORTB,SCK); // SCLK=1
tmp=tmp<<1; // Если DOUT=0, тогда просто сдвигаем tmp влево
if BitIsSet(PORTB, MISO) tmp=tmp+1; // Если DOUT=1 - тогда прибавляем еще единицу
};
return tmp; // Возвращаем 16-и разрядное слово
};
void INIT_ADC(void)
{
delay_ms(100);
Writetoreg (0b00010010);
delay_ms(100);
Writetoreg (0b01000110);
};
unsigned int ADC(void)
{
unsigned int V;
while DRDY;
Writetoreg(0b00111010);
V=Read();
return V;
};
// Declare your global variables here
void main(void)
{
// Declare your local variables here
unsigned char str[10];
unsigned int I;
// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;
// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;
// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;
// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x00;
// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;
// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;
// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;
// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;
// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;
// USART initialization
// Communication Parameters: 8 Data, 1 Stop, No Parity
// USART Receiver: Off
// USART Transmitter: On
// USART Mode: Asynchronous
// USART Baud Rate: 9600
UCSRA=0x00;
UCSRB=0x08;
UCSRC=0x86;
UBRRH=0x00;
UBRRL=0x33;
// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;
// ADC initialization
// ADC disabled
ADCSRA=0x00;
// SPI initialization
// SPI disabled
SPCR=0x00;
// TWI initialization
// TWI disabled
TWCR=0x00;
DDRB|=(1<<7)|(1<<5);
//PORTB|=(1<<7);
INIT_ADC();
while (1)
{
// Place your code here
I=ADC();
UDR=I>>8;
delay_ms(10);
UDR=I;
delay_ms(1000);
}
}
Но вместо данных стабильно идут нули. Вот где я мог наплужить?
DRDY дёргается... ( всмысле - значит инициализация нормальная )
CS на земле
Reset на +5;