Max7219 Sample Code - Raspberry Pi

// blink.c
//
// Example program for bcm2835 library
// Blinks a pin on an off every 0.5 secs
//
// After installing bcm2835, you can build this
// with something like:
// make or gcc -o led led.c -lbcm2835
// sudo ./led
/*
             define from bcm2835.h                       define from Board DVK511
                 3.3V | | 5V               ->                 3.3V | | 5V
    RPI_V2_GPIO_P1_03 | | 5V               ->                  SDA | | 5V
    RPI_V2_GPIO_P1_05 | | GND              ->                  SCL | | GND
       RPI_GPIO_P1_07 | | RPI_GPIO_P1_08   ->                  IO7 | | TX
                  GND | | RPI_GPIO_P1_10   ->                  GND | | RX
       RPI_GPIO_P1_11 | | RPI_GPIO_P1_12   ->                  IO0 | | IO1
    RPI_V2_GPIO_P1_13 | | GND              ->                  IO2 | | GND
       RPI_GPIO_P1_15 | | RPI_GPIO_P1_16   ->                  IO3 | | IO4
                  VCC | | RPI_GPIO_P1_18   ->                  VCC | | IO5
       RPI_GPIO_P1_19 | | GND              ->                 MOSI | | GND
       RPI_GPIO_P1_21 | | RPI_GPIO_P1_22   ->                 MISO | | IO6
       RPI_GPIO_P1_23 | | RPI_GPIO_P1_24   ->                  SCK | | CE0
                  GND | | RPI_GPIO_P1_26   ->                  GND | | CE1

::if your raspberry Pi is version 1 or rev 1 or rev A
RPI_V2_GPIO_P1_03->RPI_GPIO_P1_03
RPI_V2_GPIO_P1_05->RPI_GPIO_P1_05
RPI_V2_GPIO_P1_13->RPI_GPIO_P1_13:

*/
#include <bcm2835.h>
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int


//#define Max7219_pinCLK  RPI_GPIO_P1_11
#define Max7219_pinCS  RPI_GPIO_P1_24
//#define Max7219_pinDIN  RPI_V2_GPIO_P1_13

uchar disp1[38][8] = {
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//0
{0x10,0x30,0x50,0x10,0x10,0x10,0x10,0x7C},//1
{0x3E,0x02,0x02,0x3E,0x20,0x20,0x3E,0x00},//2
{0x00,0x7C,0x04,0x04,0x7C,0x04,0x04,0x7C},//3
{0x08,0x18,0x28,0x48,0xFE,0x08,0x08,0x08},//4
{0x3C,0x20,0x20,0x3C,0x04,0x04,0x3C,0x00},//5
{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x00},//6
{0x3E,0x22,0x04,0x08,0x08,0x08,0x08,0x08},//7
{0x00,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E},//8
{0x3E,0x22,0x22,0x3E,0x02,0x02,0x02,0x3E},//9
{0x08,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A
{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x00},//B
{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x00},//C
{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x00},//D
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C},//E
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40},//F
{0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C},//G
{0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44},//H
{0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C},//I
{0x3C,0x08,0x08,0x08,0x08,0x08,0x48,0x30},//J
{0x00,0x24,0x28,0x30,0x20,0x30,0x28,0x24},//K
{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C},//L
{0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81},//M
{0x00,0x42,0x62,0x52,0x4A,0x46,0x42,0x00},//N
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//O
{0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20},//P
{0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D},//Q
{0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21},//R
{0x00,0x1E,0x20,0x20,0x3E,0x02,0x02,0x3C},//S
{0x00,0x3E,0x08,0x08,0x08,0x08,0x08,0x08},//T
{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C},//U
{0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18},//V
{0x00,0x49,0x49,0x49,0x49,0x2A,0x1C,0x00},//W
{0x00,0x41,0x22,0x14,0x08,0x14,0x22,0x41},//X
{0x41,0x22,0x14,0x08,0x08,0x08,0x08,0x08},//Y
{0x00,0x7F,0x02,0x04,0x08,0x10,0x20,0x7F},//Z
{0x08,0x7F,0x49,0x49,0x7F,0x08,0x08,0x08},//中
{0xFE,0xBA,0x92,0xBA,0x92,0x9A,0xBA,0xFE},//国
};
void Delay_xms(uint x)
{

 bcm2835_delay(x);

}
//------------------------
void Write_Max7219_byte(uchar DATA)
{
         uchar i ;
         bcm2835_gpio_write(Max7219_pinCS,LOW);
       /* for(i = 8; i >= 1; i--)
            {
             bcm2835_gpio_write(Max7219_pinCLK,LOW);
             bcm2835_gpio_write( Max7219_pinDIN, (DATA & 0x80));
             DATA = DATA << 1;
             bcm2835_gpio_write(Max7219_pinCLK,HIGH);
            }
       */
      bcm2835_spi_transfer(DATA);

}
void Write_Max7219(uchar address1,uchar dat1,uchar address2,uchar dat2)
//void Write_Max7219(uchar address,uchar dat)
{
  bcm2835_gpio_write(Max7219_pinCS,LOW);

  Write_Max7219_byte(address1);
  Write_Max7219_byte(dat1);
  Write_Max7219_byte(address2);
  Write_Max7219_byte(dat2);
   //_nop_();
  //Write_Max7219_byte(address);
  //Write_Max7219_byte(dat);
  bcm2835_gpio_write(Max7219_pinCS,HIGH);
}

void Init_MAX7219(void)
{
 Write_Max7219(0x09,0x00,0x09,0x00);
 Write_Max7219(0x0a,0x03,0x0a,0x03);
 Write_Max7219(0x0b,0x07,0x0b,0x07);
 Write_Max7219(0x0c,0x01,0x0c,0x01);
 Write_Max7219(0x0f,0x00,0x0f,0x00);
}

/*void Init_MAX7219(void)
{
 Write_Max7219(0x09,0x00);
 Write_Max7219(0x0a,0x03);
 Write_Max7219(0x0b,0x07);
 Write_Max7219(0x0c,0x01);
 Write_Max7219(0x0f,0x00);
}
*/

void main(void)
{
 uchar i , j;
 if (!bcm2835_init())
        return 1;
 bcm2835_spi_begin();
 bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);      // The default
 bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);                   // The default
 bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_256); // The default


  bcm2835_gpio_fsel(Max7219_pinCS, BCM2835_GPIO_FSEL_OUTP);

  bcm2835_gpio_write(disp1[j][i],HIGH);

 Delay_xms(50);
 Init_MAX7219();
 while(1)
 {
  for(j = 0;j <37; j++)
  {
   for(i = 1;i < 9;i++)
     Write_Max7219(i , disp1[j+1][i-1],i,disp1[j][i-1]);
     Delay_xms(1000);
  }
 }
  bcm2835_spi_end();
  bcm2835_close();
  return 0;
}