以下是ps7219.h文件源码：
#define                  addr_bit_1                           0x01
#define                  addr_bit_2                           0x02
#define                  addr_bit_3                           0x03
#define                  addr_bit_4                           0x04
#define                  addr_bit_5                           0x05
#define                  addr_bit_6                           0x06
#define                  addr_bit_7                           0x07
#define                  addr_bit_8                           0x08
#define                  addr_trans_mode                  0x09
#define                  addr_light_con                  0x0a
#define                  addr_scan_count                  0x0b
#define                  addr_close                           0x0c
#define                  addr_echo_test                  0x0d

sbit                   ps7219_pin_RST =    P1^4;
sbit                  ps7219_pin_LOAD =    P1^5;
sbit                  ps7219_pin_DIN         =    P1^6;
sbit                  ps7219_pin_CLK         =    P1^7;

void ps7219_init();
void ps7219_reset();
void ps7219_echo(unsigned char da_1 da_2 da_3 da_4);
void ps7219_send_data(unsigned char addr da);
void ps7219_delay(void);

以下是ps7219.c文件源码：
#include "reg51.h"
#include "ps7219.h"

void ps7219_reset()
{
unsigned char i;
ps7219_pin_RST=0;
for(i=0;i<125;i++)
ps7219_delay();
ps7219_pin_RST=1;
for(i=0;i<255;i++)
ps7219_delay();
ps7219_pin_RST=0;
for(i=0;i<125;i++)
ps7219_delay();
}

void ps7219_init()
{
ps7219_reset();
ps7219_send_data(addr_scan_count 0 0 0 0 ps7219_echo(unsigned char da_1 da_2 da_3 da_4)
{
        ps7219_send_data(0x01 da_1);
        ps7219_send_data(0x02 da_2);
   ps7219_send_data(0x03 da_3);
   ps7219_send_data(0x04 da_4);

}

void ps7219_send_data(unsigned char addr da)
{
unsigned char i byte_out;
byte_out=addr;
ps7219_pin_DIN=1;
ps7219_pin_CLK=1;
ps7219_pin_LOAD=0;

for(i=0;i<8;i++)
{
ps7219_pin_CLK=1;
ps7219_pin_DIN=(bit)(byte_out&0x80);
byte_out=byte_out<<1;
ps7219_pin_CLK=0;
ps7219_delay();

}

ps7219_pin_CLK=1;
byte_out=da;
for(i=0;i<7;i++)
{
ps7219_pin_CLK=1;
ps7219_pin_DIN=(bit)(byte_out&0x80);
byte_out=byte_out<<1;
ps7219_pin_CLK=0;
ps7219_delay();

}
ps7219_pin_CLK=1;
ps7219_pin_LOAD=1;
ps7219_pin_DIN=(bit)(byte_out&0x80);
ps7219_pin_CLK=0;
ps7219_delay();
ps7219_pin_CLK=1;
}

void ps7219_delay(void)
{
unsigned char i;
for(i=0;i<125;i++)
{}

}

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