老外的M8 mini邏輯分析儀制作資料

ID:367645 · 發(fā)表于 2018-7-9 10:38

網(wǎng)上找的一個老外的作品，用AVR M8做的一個簡易的邏輯分析儀，適合有一定單片機基礎(chǔ)的學(xué)習(xí)者參考學(xué)習(xí)。喜歡的可以自己玩玩。

制作出來的實物圖如下：

單片機源程序如下:

/*
** Four-channel mini logic analyzer.
**
** Target: ATmega8 at 16MHz crystal
**
** Input pins PD0-PD3
**
** Frimware v1.00 was written by Vassilis Serasidis on 01 January 2012.
** avrsite@yahoo.gr, info@serasidis.gr
**
** IDE: AVRstudio 4.18 with AVR-gcc plugin (WinAVR-20100110).
**
** Nokia 3310 / 5110 gLCD library (84*48 pixels) was written by Tony Myatt - 2007
** Small modifications to the gLCD source code library had been made by Vassilis Serasidis.
**
** 3310/5110 LCD is connected on AVR's PORT B
** See <lcd.h> file for pins assignment between AVR and 3310/5110 LCD.
**
** Nokia LCD ATmega8
** ------------ -------
** LCD_CLK_PIN PB4
** LCD_DATA_PIN PB3
** LCD_DC_PIN PB2
** LCD_RST_PIN PB1
** LCD_CE_PIN PB0
**
**
*/
#include <avr/io.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <util/delay.h>
#include <avr/pgmspace.h>
#include "lcd.h"
#include "introScreen.h"
#include "createdBy.h"
#define BUFFER_SIZE 870 // 290 Sample transitions * 3 bytes for each sample = 870 bytes.
#define POSITIONS_LENGTH 19004860 //BUFFER_SIZE * (MAX_SAMPLE_TIME/3) = (870/3) * 65534 = 19004860
#define ONE_LINE_LENGTH 84
#define MAX_SAMPLE_TIME 65534
#define IN1 0
#define IN2 1
#define IN3 2
#define IN4 3
#define ONE 32
#define ZERO 4
#define TRANSITION 60
#define MIDDLE 36
#define FALSE 1
#define TRUE 0
#define BTN_INCREASE PD4
#define BTN_DECREASE PC5
#define BTN_ZOOM_OUT PD5
#define LED1 PB5
char dataBuffer[BUFFER_SIZE];
volatile unsigned int i, counter, bufferUsedSpace, zoom, minSampleTime;
volatile unsigned long samplesPos;
char int2str[8];
void checkIfNoButtonIsPressed (void);
void checkDecreaseButton (void);
void checkIncreaseButton (void);
void printCapturedData (unsigned long position, unsigned char inputChannel);
void printRuler (void);
void saveSampleToBuffer (void);
void checkInputs (void);
void sendChannelsDataOnLCD (void);
void getNextSampleString (void);
//char createdBy1 [] PROGMEM = {"Vassilis"};
//char createdBy2 [] PROGMEM = {"Serasidis"};
//char createdBy3 [] PROGMEM = {"(c)01 Jan 2012"};
//char createdBy4 [] PROGMEM = {"www*serasidis*gr"};
//========================================================================
// Main program
//========================================================================
int main(void)
{
DDRD = 0x00;
PORTD = 0x00;
DDRC = 0x00;
PORTC = 0xff;
DDRB |= (1<<LED1);
PORTB &= ~(1<<LED1);
PORTD |= (1<<BTN_INCREASE); //Enable pull-up resistor on BTN_DECREASE pin.
PORTC |= (1<<BTN_DECREASE); //Enable pull-up resistor on BTN_INCREASE pin.
PORTD |= (1<<BTN_ZOOM_OUT); //Enable pull-up resistor on BTN_ZOOM_OUT pin.
_delay_ms(100);
lcd_init();
_delay_ms(100);
lcd_contrast(0x40);
printPictureOnLCD(introScreen);
printPictureOnLCD(createdBy);
samplesPos = 0;
bufferUsedSpace = 0;
zoom = 1;
minSampleTime = MAX_SAMPLE_TIME;
counter = 0;
lcd_clear();
lcd_goto_xy(3,3);
lcd_str("Waiting for");
lcd_goto_xy(4,4);
lcd_str("signal...");
checkInputs(); // Stay here until a logic level change will be made on PORT D.
// Then, read all changes on PORT D until dataBuffer will be full.
lcd_clear();
lcd_goto_xy(14,1);
lcd_chr('1');
printRuler();
sendChannelsDataOnLCD();
for(;;)
{
checkDecreaseButton();
checkIncreaseButton();
checkIfNoButtonIsPressed();
}
}
//========================================================================
//
//========================================================================
void getNextSampleString (void)
{
unsigned int w;
if(bit_is_clear(PINC,BTN_DECREASE))
{
for(w=0; w<BUFFER_SIZE;w++) //Clear the buffer for next sample string.
dataBuffer[w] = 0xFF;
samplesPos = 0;
bufferUsedSpace = 0;
zoom = 0;
minSampleTime = MAX_SAMPLE_TIME;
counter = 0;
lcd_clear();
lcd_goto_xy(3,3);
lcd_str("Waiting for");
lcd_goto_xy(4,4);
lcd_str("signal...");
checkInputs();
lcd_clear();
lcd_goto_xy(14,1);
lcd_chr('1');
printRuler();
}
}
//========================================================================
//
//========================================================================
void checkInputs (void)
{
unsigned char dataPins;
dataPins = PIND; //Read the pins status on Port D (this is the initial PORT D status).
while (dataPins == PIND); //Stay here until at least one pin on PORT D changes its Logic status.
PORTB |= (1<<LED1); //Turn-ON the LED. Start recording sample lengths to the AVR's dataBuffer.
while(bufferUsedSpace < BUFFER_SIZE) //While the used buffer is not full, repeat this loop.
{
if((dataPins == PIND)&&(counter < MAX_SAMPLE_TIME)) // If the PORT D has the same status as before, just...
counter++; //... increase the counter.
else // or else,
{
saveSampleToBuffer(); //save to the buffer the length of the pulse.
dataPins = PIND; //Read the pins status on Port D.
}
}
PORTB &= ~(1<<LED1); //Turn-OFF the LED. That means that AVR has filled its dataBuffer.
}
//========================================================================
//
//========================================================================
void checkIfNoButtonIsPressed (void)
{
unsigned int w;
if(bit_is_clear(PIND,BTN_ZOOM_OUT))
{
while(bit_is_clear(PIND,BTN_ZOOM_OUT));
getNextSampleString();
if((zoom > 0)&&(zoom < 8192))
zoom *= 2;
else
zoom = 1;
lcd_clear_area(1,61,83);
itoa(zoom,int2str,10);
w = strlen(int2str);
lcd_goto_xy(15 - w,1);
lcd_str(int2str);
sendChannelsDataOnLCD();
}
}
//========================================================================
//
//========================================================================
void checkIncreaseButton (void)
{
if(bit_is_clear(PIND,BTN_INCREASE)&&(samplesPos < POSITIONS_LENGTH)) //Scroll to the left the waveform content.
{
if(counter < MAX_SAMPLE_TIME)
{
if(samplesPos < (POSITIONS_LENGTH - zoom))
samplesPos += zoom;
sendChannelsDataOnLCD();
}
}
}
//========================================================================
//
//========================================================================
void checkDecreaseButton (void)
{
if(bit_is_clear(PINC,BTN_DECREASE)&&(samplesPos > 0)) //Scroll to the right the waveform content.
{
if(counter < MAX_SAMPLE_TIME)
{
if(samplesPos >= zoom)
samplesPos -= zoom;
sendChannelsDataOnLCD();
}
}
}
//========================================================================
//
//========================================================================
void printCapturedData (unsigned long position, unsigned char inputChannel)
{
unsigned int m,j, b,sampleLength,n,samplLength;
unsigned char w, sample, nextSample = 0;
unsigned long lengthSum,oldLength;
lcd_clear_area(1,1,42);
ltoa(position,int2str,10);
w = strlen(int2str);
lcd_goto_xy(9-w,1);
lcd_str(int2str);
lcd_goto_xy(1,inputChannel + 3); //Go to LCD line 3, 4, 5 or 6.
n = 0;
w = 1;
b = 0;
lengthSum = 0;
oldLength = 0;
samplLength = 0;
sampleLength = dataBuffer[b];
sampleLength <<= 8; //HIGH byte of counter
sampleLength |= dataBuffer[b+1]; //LOW byte of counter
do
{
lengthSum += sampleLength;
if(samplesPos > lengthSum)
{
oldLength += sampleLength;
b += 3; //Each sample has 3 bytes. 2 for sample length and 1 for the PIN D status data.
sampleLength = dataBuffer[b];
sampleLength <<= 8; //HIGH byte of counter
sampleLength |= dataBuffer[b+1]; //LOW byte of counter
}
}while(samplesPos > lengthSum);
for(m=b;m<BUFFER_SIZE;m+=3)
{
sampleLength = dataBuffer[m];
sampleLength <<= 8; //HIGH byte of counter
sampleLength |= dataBuffer[m+1]; //LOW byte of counter
if(w > 0)
{
sampleLength -= (samplesPos - oldLength);
w=0;
}
sample = dataBuffer[m+2];
if((m+5) < BUFFER_SIZE)
{
nextSample = dataBuffer[m+5];
nextSample ^= sample;
}
samplLength = sampleLength;
if(zoom > 0)
samplLength /= zoom;
for(j=0;j<samplLength;j++)
{
if(bit_is_set(sample,inputChannel))
lcd_col(ONE); //1
else
lcd_col(ZERO);//0
n++;
if(n >= ONE_LINE_LENGTH)
break;
}
if(bit_is_set(nextSample,inputChannel))
{
lcd_pixelBack();
lcd_col(TRANSITION);
nextSample = 0; //Set nextSample to <No Sample> status.
}
if(n >= ONE_LINE_LENGTH)
break;
}
}
//========================================================================
//
//========================================================================
void printRuler (void)
{
unsigned char k;
lcd_goto_xy(1,2); //Go to LCD line 2.
for(k=0;k<8;k++)
{
lcd_col(TRANSITION);
lcd_col(0b00000000);
lcd_col(0b00011000);
lcd_col(0b00000000);
lcd_col(0b00011000);
lcd_col(0b00000000);
lcd_col(0b00011000);
lcd_col(0b00000000);
lcd_col(0b00011000);
lcd_col(0b00000000);
}
lcd_col(TRANSITION);
lcd_col(0b00000000);
lcd_col(0b00011000);
lcd_col(0b00000000);
}
//========================================================================
//
//========================================================================
void saveSampleToBuffer (void)
{
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