原创 AT91sam7s64的LCD1602简便6线显示

     手头只有lcd1602和st7920的lcd128*64两款lcm，现在是基于at91sam7s64的lcd1602显示，过几天在把st7920的显示发上来。

     lcd显示只要把时序做好就可以了，在此基础上可以把at91sam7s64的AD和RTC都可以在lcd上显示，为了保护at91sam7s64，接口电路最好接电平转换芯片或者电阻。

/*--------------------------lcd.h----------------------------------------*/

主要源码：

void E_Pulse()
{
  l_pPio->PIO_SODR = BIT10; 
  Delay_mS(100);            
  l_pPio->PIO_CODR = BIT10;  
}

void LCDInit()
{
  l_pPio->PIO_OER = (BIT28|BIT29|BIT30|BIT31|BIT8|BIT9|BIT10);

  l_pPio->PIO_PER = (BIT28|BIT29|BIT30|BIT31|BIT8|BIT9|BIT10);

  l_pPio->PIO_CODR = BIT8|BIT9|BIT10; 
  Delay_mS(1100000);                    

  l_pPio->PIO_SODR = BIT28|BIT29;        
  E_Pulse();                            

  Delay_mS(100000);                    

  l_pPio->PIO_SODR = BIT28|BIT29;      
  E_Pulse();                            

  Delay_mS(100000);                     

  l_pPio->PIO_SODR = BIT28|BIT29;      
  E_Pulse();                             

  Delay_mS(100000);                    

  l_pPio->PIO_CODR = BIT28;             
  l_pPio->PIO_SODR = BIT29;             
  E_Pulse();                             

  Delay_mS(100000);                     
}

void LCDSendCommand(unsigned long a)
{

  l_pPio->PIO_CODR =  BIT9;                

  Delay_mS(20000);                           

  data = 0x0;                             

  data = 0xffffff0f | a;                     

  l_pPio->PIO_CODR = BIT28|BIT29|BIT30|BIT31;

  data = data << 24;                       

  l_pPio->PIO_SODR = 0xf0000000 & data;     

  l_pPio->PIO_CODR =  BIT8;             

  E_Pulse();                               

  data = 0x0;                               

  a = a<<4;                                  

  data = 0xffffff0f | a;                    

  l_pPio->PIO_CODR = BIT28|BIT29|BIT30|BIT31;

  data = data <<24;                        

  l_pPio->PIO_SODR = 0xf0000000 & data;     
  l_pPio->PIO_CODR =  BIT8;                 

  E_Pulse();                                 

}

void LCDSendChar(unsigned long a)
{
  l_pPio->PIO_CODR =  BIT9;                

  Delay_mS(20000);                        

  data = 0x0;                              

  data = 0xffffff0f | a;                     

  l_pPio->PIO_CODR = BIT28|BIT29|BIT30|BIT31;

  data = data << 24;                         

  l_pPio->PIO_SODR = 0xf0000000 & data;     
  l_pPio->PIO_SODR =  BIT8;               

  E_Pulse();                                

  data = 0x0;                               

  a = a<<4;                                  

  data = 0xffffff0f | a;                     

  l_pPio->PIO_CODR = BIT28|BIT29|BIT30|BIT31;

  data = data << 24;                        

  l_pPio->PIO_SODR = 0xf0000000 & data;      

  l_pPio->PIO_SODR =  BIT8;            

  E_Pulse();                               
}

void LCDSendTxt(char* a)
{
  for(int i="0"; i<strlen(a); i++)
  {
    LCDSendChar(a);
  }
}