fezder
Well-Known Member
Thanks doggy, all leds are lit now with this current code:
C:
#include "FontMap.h"
int dataPin = 2; // ic: 14, ser_in Define which pins will be used for the Shift Register control
int latchPin = 3; // ic:12 silkscreen numbers!
int clockPin = 4;
unsigned char displayPointer=0; // for interrupt use...
unsigned char buffer1[32]; // buffer for screen
unsigned char backbuffer[32]; // Spare screen for drawing on
unsigned char power[8]={128,64,32,16,8,4,2,1};
ISR(TIMER1_COMPA_vect) // timer compare interrupt service routine
{
if(TIFR0) // Make sure its the timer interrupt.
{
setcolumn(displayPointer);
setdata(buffer1[displayPointer]);
digitalWrite(latchPin ,HIGH);digitalWrite(latchPin , LOW ); // STORECLOCK
if(++displayPointer==32) { displayPointer = 0; } // 32 LED row sections in total
}
TIFR0 = 0; // Clear timer 2 interrupt flag
}
void setcolumn(unsigned char col){
signed char pos;
for (pos = 32;pos>-1;pos--){
if (col == pos){digitalWrite(dataPin ,HIGH);}else {digitalWrite(dataPin ,LOW);} // PIN1 DATA pin
digitalWrite(clockPin ,HIGH);digitalWrite(clockPin ,LOW);
}}
void setdata(unsigned char dat){
unsigned char pos;
for (pos = 0;pos<8;pos++){
if (dat & 128){dat-=128;digitalWrite(dataPin ,HIGH);}else { digitalWrite(dataPin ,LOW);} // PIN1 DATA pin
dat = dat * 2;
digitalWrite(clockPin ,HIGH);digitalWrite(clockPin ,LOW);
}}
void clr() //clear
{
int addr;
for(addr=0;addr<32;addr++) // Empty display buffer
backbuffer[addr]= 0;
}
void Blit() //transfers data between display buffer to screen buffer
{
int addr=0;
noInterrupts(); // disable all interrupts during setup
for(addr=0;addr < 32;addr ++)
{
buffer1[addr] = backbuffer[addr]; // put all data from display buffer
} // to screen buffer
interrupts(); // enable all interrupts
}
void pixel(signed char x,signed char y,int cond)
{
unsigned char pix,msk;
if(x<0 || y<0) return; // outside drawing limits negative
if(x>31 || y>7) return; // outside drawing limits positive
pix = power[y];
msk = backbuffer[x]; // get exsisting data
if(cond == 2)
pix ^= msk; // XOR data to screen
if (cond == 1)
{
pix = ~pix;
pix &= msk; // AND data to screen
}
if(cond == 0)
pix |= msk; // OR data to screen
backbuffer[x] = pix; // apply changes
}
void charput(unsigned char ch, signed char x,signed char y)
{
signed char x1, y1;
unsigned char disp;
unsigned char disp2;
for( x1=0;x1<8;x1++) // eight rows
{
disp = font[x1+(ch * 8)];
for (y1 = 0; y1<8; y1++) // eight pixels
{
disp2 = disp & power[y1];
if(disp2 > 0)
{
pixel(x+x1,y+y1,0); // OR the pixel to the display buffer
}
}
}
}
void strput(const char* ch, signed char x,signed char y)
{
int addr;
while (*ch )
{
charput(*ch++,x,y); // write a string to the display buffer
x+=7;
}
}
void setup() //setup runs once
{
noInterrupts(); // disable all interrupts during setup
DDRD = DDRD | B11111100; //port registers used to set pin directions
// Set the Timer Mode to CTC
TCCR0A |= (1 << WGM01);
// Set the value that you want to count to
OCR0A = 0xF9;
// start the timer
TCCR0B |= (1 << CS01) | (1 << CS00);
// set prescaler to 64 and start the timer
while ( (TIFR0 & (1 << TOV0) ) > 0) // wait for the overflow event
{
}
TIFR0 &= ~(1 << TOV0);
// reset the overflow flag
interrupts(); // enable all interrupts
} // End main
void loop() //just sitting here
{
clr();
pixel(0,0,0);
pixel(31,8,0);
strput("WOOF",1,0);
Blit();
delay(500);
}
Last edited: