AT402-POV-display

This is a simple POV display with an ATtiny402

I built it from scratch, then created a PCB for better display I use a tilt switch to turn it on when the fan spins. You can change in the code, what it says, speeds and working on reverse mode (code still under construction).

/*

* ATtiny402-POV-fan.c

*

* Created: 1/31/2024 17:36:42

* Author : sherm

*/

#define F_CPU 3333333

#include <avr/io.h>

#include <util/delay.h>

#include "povFont.h"

#define led0 PIN1_bm

#define led1 PIN2_bm

#define led2 PIN3_bm

#define led3 PIN6_bm

#define led4 PIN7_bm

//#define spaceDelay 2000 //use space font 26 instead.

#define letterSpaceDelay 800

#define columnSpaceDelay 200

#define columnOnDelay 1000

const uint8_t word[]={P,R,A,Y,SPACE,O,F,T,E,N,EP,SPACE,SPACE};

void dispLetter(uint8_t);

void displayWord (void);

//not working yet

void dispLetterReverse(uint8_t);

void displayWordReverse (void);

int main(void)

{

/* Replace with your application code */

PORTA.DIRSET = PIN3_bm|PIN1_bm|PIN2_bm|PIN6_bm|PIN7_bm;

// PORTA.OUT = PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

while (1)

{

// displayWordReverse();

dispLetter(SPACE);

displayWord();

dispLetter(SPACE);

}

//not working functions///////////////////////////////////////////////////

void displayWordReverse (void){

// for(uint8_t i = sizeof(word)-1; i>=0;i--){

dispLetterReverse(P);//word[i]);

// }

/*

uint8_t revLetter=sizeof(word);

revLetter--;

do{

dispLetterReverse(sizeof word); //[revLetter]);

revLetter--;

}while(revLetter>=0);

*/

}

void dispLetterReverse(uint8_t Rletter){ //letter

uint8_t revWord;

// uint8_t revWord = 4;

// do{

// revWord--;

for (revWord=0;revWord < 5;revWord++){

if(font[Rletter][revWord] == 0){

PORTA.OUTCLR= PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

}else{

if(0x1 & font[Rletter][revWord]){

PORTA.OUTSET = led0;

}

if(0x2 & font[Rletter][revWord]){//revWord

PORTA.OUTSET = led1;

}

if(0x4 & font[Rletter][revWord]){

PORTA.OUTSET = led2;

}

if(0x8 & font[Rletter][revWord]){

PORTA.OUTSET = led3;

}

if(0x10 & font[Rletter][revWord]){

PORTA.OUTSET = led4;

}

_delay_us(columnOnDelay);

PORTA.OUTCLR= PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

_delay_us(columnSpaceDelay);

// revWord--;

// } while (revWord >=0);

}

PORTA.OUTCLR= PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

_delay_us(letterSpaceDelay);

}

//working functions//////////////////////////////////////////////////////////////

void displayWord (void){

for(uint8_t i = 0; i<sizeof(word);i++){

dispLetter(word[i]);

}

void dispLetter(uint8_t letter){

for (uint8_t i=0;i<5;i++){

if(font[letter][i] == 0){

PORTA.OUTCLR= PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

}else{

if(0x1 & font[letter][i]){

PORTA.OUTSET = led0;

}

if(0x2 & font[letter][i]){

PORTA.OUTSET = led1;

}

if(0x4 & font[letter][i]){

PORTA.OUTSET = led2;

}

if(0x8 & font[letter][i]){

PORTA.OUTSET = led3;

}

if(0x10 & font[letter][i]){

PORTA.OUTSET = led4;

}

_delay_us(columnOnDelay);

PORTA.OUTCLR= PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

_delay_us(columnSpaceDelay);

}

PORTA.OUTCLR= PIN7_bm|PIN6_bm|PIN3_bm|PIN1_bm|PIN2_bm;

_delay_us(letterSpaceDelay);

}

/*

* povFont.h

*

* Created: 2/1/2024 12:00:15

* Author: sherm

*/

#ifndef POVFONT_H_

#define POVFONT_H_

#define A 0

#define B 1

#define C 2

#define D 3

#define E 4

#define F 5

#define G 6

#define H 7

#define I 8

#define J 9

#define K 10

#define L 11

#define M 12

#define N 13

#define O 14

#define P 15

#define Q 16

#define R 17

#define S 18

#define T 19

#define U 20

#define V 21

#define W 22

#define X 23

#define Y 24

#define Z 25

#define SPACE 26

#define EP 27

#define QM 28

#define PERIOD 29

#define DASH 30

const uint8_t font[31][5] = {

{0b00011100, //A

0b00000110,

0b00000101,

0b00000110,

0b00011100},

{0b00011111, //B

0b00010101,

0b00001010},

{0b00001110, //C

0b00010001,

0b00001010},

{0b00011111, //D

0b00010001,

0b00001010,

0b00000100},

{0b00011111, //E

0b00010101,

0b00010101},

{0b00011111, //F

0b00000101,

0b00000001},

{0b00001110, //G

0b00010001,

0b00010101,

0b00011101},

{0b00011111, //H

0b00000100,

0b00011111},

{0b00000000, //I

0b00010001,

0b00011111,

0b00010001,

0b00000000},

{0b00000001, //J

0b00001001,

0b00010001,

0b00001111,

0b00000001},

{0b00011111, //K

0b00000100,

0b00001010,

0b00010001,

0b00000000},

{0b00000000, //L

0b00011111,

0b00010000,

0b00000000},

{0b00011111, //M

0b00000010,

0b00000100,

0b00000010,

0b00011111},

{0b00011111, //N

0b00000010,

0b00000100,

0b00001000,

0b00011111},

{0b00001110, //O

0b00010001,

0b00001110},

{0b00011111, //P

0b00000101,

0b00000010},

{0b00001110, //Q

0b00010001,

0b00001001,

0b00010110},

{0b00011111, //R

0b00000101,

0b00001101,

0b00010110},

{0b00010010, //S

0b00010101,

0b00001001,

0b00000000},

{0b00000001, //T

0b00000001,

0b00011111,

0b00000001,

0b00000001},

{0b00001111, //U

0b00010000,

0b00001111},

{0b00000111, //V

0b00001000,

0b00010000,

0b00001000,

0b00000111},

{0b00001111, //W

0b00010000,

0b00000100,

0b00010000,

0b00001111},

{0b00010001, //X

0b00001010,

0b00000100,

0b00001010,

0b00010001},

{0b00000001, //Y

0b00000010,

0b00011100,

0b00000010,

0b00000001},

{0b00010001, //Z

0b00011001,

0b00010101,

0b00010011,

0b00010001},

{0b00000000, //SPACE

0b00000000,

0b00000000},

{0b00000000, //EP

0b00000000,

0b00010111,

0b00000000,

0b00000000},

{0b00000000, //QM

0b00000010,

0b00011001,

0b00000101,

0b00000010},

{0b00000000, //PERIOD

0b00010000,

0b00000000,

0b00000000},

{0b00000000, //DASH

0b00000100,

0b00000000}

};

#endif /* POVFONT_H_ */