Pantalla12x8

Design constraints

The matrix used has 12 pixels width and 8 pixels height, for a total of 96 pixels.

To design the 0-9 numbers for the decimal format, we first centered them in the screen.

So we are dividing the screen in horizontal mode, in 3 sections, each with 8 pixels width and 8 pixels height, and we only use the one in the middle.

In that third, we decided to leave the first column blank, in order to be able to display up to 3 numbers in the screen, with a space in between.

The other design decision was to make numbers have a smaller upper section, and a larger lower section.

Numbers in 8x12 matrices

uint32_t cero[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 }
};
 
uint32_t uno[8][12] = {
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }
};
 
uint32_t dos[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 }
};
 
uint32_t tres[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 }
};
 
uint32_t cuatro[8][12] = {
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }
};
 
 uint32_t cinco[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 }
};
 
uint32_t seis[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 }
};
 
uint32_t siete[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }
};
 
uint32_t ocho[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 }
};
 
uint32_t nueve[8][12] = {
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
  { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
 { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 }
};

Numbers in hexadecimal format

Each 4 bits in a row are converted to 1 hexadecimal character.

Each screen can then be written as 3 numbers, each made up of 8 hexadecimal characters.

uint32_t cero[] = {
  0x07005005,
  0x00500500,
  0x50050070
};
 
uint32_t uno[] = {
  0x01003005,
  0x00100100,
  0x10010010
};
 
uint32_t dos[] = {
  0x07001001,
  0x00700400,
  0x40040070
};
 
uint32_t tres[] = {
  0x07001001,
  0x00700100,
  0x10010070
};
 
uint32_t cuatro[] = {
  0x05005005,
  0x00700100,
  0x10010010
};
 
uint32_t cinco[] = {
  0x07004004,
  0x00700100,
  0x10010070
};
 
uint32_t seis[] = {
  0x07004004,
  0x00700500,
  0x50050070
};
 
uint32_t siete[] = {
  0x07001007,
  0x00100100,
  0x10010010
};
 
uint32_t ocho[] = {
  0x07005005,
  0x00700500,
  0x50050070
};
 
uint32_t nueve[] = {
  0x07005007,
  0x00100100,
  0x10010010
};