c8051F040单片机驱动74HC595程序

#include "C8051F040.h"
#define uchar unsigned char
#define uint unsigned int

uchar xdata virt_port;
bit SPI_BUSY;
unsigned char xdata tab1[16]={0x20,0x20,0x42,0x54,0x20,0x46,0x30,0x34,0x30,0x20,0x56,0x31,0x2e,0x30
                            ,0x20,0x20};
unsigned char xdata Netdata[16]={0x77,0x77,0x77,0x2e,0x78,0x68,0x6c,0x2e,0x63,0x6f,
                                0x6d,0x2e,0x63,0x6e,0x20,0x20}; 
sbit LCDCs=P2^5;
void os_init();
void port_init();
void spi_init();
void writecode(uchar ins);
void writEDAta(uchar d);
void lcdchar (void);
void lcdinit();
void writelcd(uchar spi_data);
void main()
{  
    WDTCN = 0xDE;                                           // 关闭看门狗
    WDTCN = 0xAD;
    os_init();
    port_init();
    spi_init();
      SFRPAGE   = CONFIG_PAGE;
     EIE1      = 0x01;
     EA=1;
   while(1)
   {
 
   
   lcdinit();
   lcdchar();
   }

}
void os_init()
{
    int i = 0;
    SFRPAGE   = CONFIG_PAGE;
    OSCXCN    = 0x67;                                    //外部22.1184M晶振
    for (i = 0; i < 3000; i++);                         //等待外部晶振稳定 
    while ((OSCXCN & 0x80) == 0);
    CLKSEL    = 0x01;                                    //系统时钟不分频
}
void port_init()
{
    SFRPAGE   = CONFIG_PAGE;
       P0MDOUT=0xff;
    XBR0      = 0x06;
    XBR2      = 0x40;

}
void spi_init()
{
      SFRPAGE   = SPI0_PAGE;
      SPI0CFG   = 0x40;
      SPI0CN    = 0x01;
      SPI0CKR   = 0x6D;


}



 void delay1us(void)
    {
    uchar xdata i;
    for(i=10;i>0;i--);
    } 

void writelcd(uchar spi_data)       //向LV595写数据以SPI方式
{
  uint xdata i,j,k;
     for(i=0;i<9;i++);
    LcdCs=0;
    delay1us();    
    SPI_BUSY=1;
    SFRPAGE   = SPI0_PAGE;
    SPI0DAT=spi_data;
    for(j=0;j<500;j++)
        {
       if(!SPI_BUSY)break;
        } 
    delay1us();
    
    LcdCs=1;
    delay1us();
    delay1us();
    delay1us();
    delay1us();
    delay1us();
    delay1us();
    for(k=0;k<5000;k++);
    
/* **************************************************************************
 // 以下这段代码，是用IO口模拟SPI传输的程序
   LcdCs=0;
  for(i=0;i<8;i++)
  { SPICLK=0;
    if(spi_data&0x80)
       spi_mosi=1;
    else 
       spi_mosi=0;
    spi_data<<=1;
    SPICLK=1;
     for(j=0;j<10;j++)
     {_nop_();}
    SPICLK=0;
   }
   LcdCs=1;
/***************************************************************************/
}
void writecode(uchar ins)                    //向液晶控制模块写命令
     {
      uchar xdata t;
      uint xdata j;
    
      for(j=0;j<500;j++);    
      virt_port|=ins&0xf0;                    //取高字节向１６０２写数据 
      writelcd(virt_port);                    //先写高４位后再写低４位　这是在选择四个数据线的时候
     
      virt_port|=0x08;                          
      writelcd(virt_port);                    //使能E脚为高电平
      virt_port&=~0x08;                    
      writelcd(virt_port);                    //使能E脚为低电平

      t=ins<<4;             

[1] [2] [3]  下一页

本文关键字：单片机  程序  51单片机，单片机-工控设备 - 51单片机