Keyestudio ARDUINO maker learning kit Manual page 121

Sample program for displaying "0"
//////////////////////////////////////////////////////////
// set an array to store character of "0"
unsigned char Text[]={0x00,0x1c,0x22,0x22,0x22,0x22,0x22,0x1c};
void Draw_point(unsigned char x,unsigned char y)// point drawing function
{ clear_();
digitalWrite(x+2, HIGH);
digitalWrite(y+10, LOW);
delay(1);
}
void show_num(void)// display function, call point drawing function
{
unsigned char i,j,data;
for(i=0;i<8;i++)
{
data=Text[i];
for(j=0;j<8;j++)
{
if(data & 0x01)Draw_point(j,i);
data>>=1;
}
}
}
void setup(){
int i = 0 ;
for(i=2;i<18;i++)
{
pinMode(i, OUTPUT);
}
clear_();
}
void loop()
{ show_num();
}
void clear_(void)// clear screen
{for(int i=2;i<10;i++)
digitalWrite(i, LOW);
for(int i=0;i<8;i++)
digitalWrite(i+10, HIGH);
}
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