SHIELD-Malb41k1/slave/SPISlave.c

#include <avr/io.h>
#include "SPISlave.h"
#include "head_oled_i2c.h"

static int index = 0;
static int arIndex = 0;
static char data[255];

void SPI_SlaveInit(void)
{
  DDR_SPI = (1 << DD_MISO);
  SPCR = (1 << SPE) | (1 << SPIE);
}

void SetCommand(char *data2, int length){
  char command = data2[0];
  // Отрезать 1 элемент от оставшихся
  switch (command){
    case 1:
      AllClearCommand(&data2[1], length-1);
      break;
    case 2:
      SetPageCommand(&data2[1], length-1);
      break;
    case 3:
      AddSymbolCommand(&data2[1], length-1);  
      break;
    case 4:
      DelSymbolCommand(&data2[1], length-1);
      break;
    case 5:
      DrawPixelCommand(&data2[1], length-1);
      break;
    case 6:
      DrawLineCommand(&data2[1], length-1);
      break;
    case 7:
      DrawCircleCommand(&data2[1], length-1);
      break;
    case 8:
      DrawRectangleCommand(&data2[1], length-1);
      break;
    case 9:
      DrawCharCommand(&data2[1], length-1);
      break;
  }
}

// command 1
void AllClearCommand(char *symbols, int lenght){
  int param = symbols[0];
  if (param == 0){
    Fill(0);
    update();
  }
  else{
    Fill(255);
    update();
  }
  ClearPages();
 }

// command 2
void SetPageCommand(char *symbols, int lenght){
  SetPage(symbols[0]);
  update();
 }

// command 3
void AddSymbolCommand(char *symbols, int lenght) {
  for (int i = 0; i < lenght - 1; i++) {
    AddSymbol(symbols[i]);
  }
  update();
}

// command 4 
void DelSymbolCommand(char *symbols, int lenght) {
  for (int i = 0; i < symbols[0]; i++) {
    DelSymbol();
  }
  
  update();
}

// command 5
void DrawPixelCommand(char *symbols, int lenght){
  int x = symbols[0];
  int y = symbols[1];
  int color = symbols[2];

  DrawPixel(x, y, color);
  update();
}

// command 6
void DrawLineCommand(char *symbols, int lenght){
  int x = symbols[0];
  int y = symbols[1];
  int x1 = symbols[2];
  int y1 = symbols[3];
  int color = symbols[4];

  DrawLine(x, y, x1, y1, color);
  update();
}

// command 7
void DrawCircleCommand(char *symbols, int lenght){
  int x = symbols[0];
  int y = symbols[1];
  int r = symbols[2];
  // white on black color=1, fill=0
  int color = symbols[3];
  int fill = symbols[4]; 

  DrawCircle(x, y, r, color, fill);
  update();
}

// command 8
void DrawRectangleCommand(char *symbols, int lenght){
  int x = symbols[0];
  int y = symbols[1];
  int width = symbols[2];
  int height = symbols[3];
  // white on black color=1, fill=0
  int color = symbols[4];
  int fill = symbols[5]; 
  DrawRect(x, y, width, height, color, fill);
  update();
}

// command 9
void DrawCharCommand(char *symbols, int lenght){
  int x = symbols[0];
  int y = symbols[1];
  int charIndex = symbols[2];
  int fill = symbols[3];
  // white on black color=1, fill=0

  DrawChar(x, y, charIndex, fill);
  update();
}

char crc8(char *data, int len) {
  char crc = 0x00;
  while (len--) {
    crc ^= *data++;
    for (int i = 0; i < 8; i++) {
      if (crc & 0x80) {
        crc = (crc << 1) ^ 0x07;
      } else {
        crc <<= 1;
      }
    }
  }
  return crc;
}