3310.c

at91sam7s64 SPI 演示程序

/************************************************************/
/*		 3310 Code for   AT91SAM7S64						*/
/*				By   pasyong								*/
/*				www.okarm.com								*/
/*				Base IAR 4.30A							*/
/************************************************************/
#include "ioat91sam7s64.h"
#include "english_6x8_pixel.h "
#define LCD_DC      ((unsigned int) 1 << 28)
#define LCD_CE       ((unsigned int) 1 << 29)
#define LCD_RST      ((unsigned int) 1 << 30)
/*-----------------------------------------------------------------------
PORT_INIT函数
-----------------------------------------------------------------------*/
void PORT_init()
{
  *AT91C_PIOA_PER|=(LCD_DC|LCD_CE|LCD_RST);
  *AT91C_PIOA_OER|=(LCD_DC|LCD_CE|LCD_RST);
}
void SPI_init()
{

  *AT91C_PMC_PCER=1<<AT91C_ID_SPI ;
  //PIO外设功能时钟始能
  *AT91C_PIOA_PDR|=(AT91C_PA12_MISO|AT91C_PA13_MOSI|AT91C_PA14_SPCK);
   //PIO使能引脚的外设功能
  *AT91C_PIOA_ASR|=(AT91C_PA12_MISO|AT91C_PA13_MOSI|AT91C_PA14_SPCK);
  //外设A分配给SPI外设A功能;
  *AT91C_SPI_CR|=AT91C_SPI_SPIEN ;
  //允许SPI口
  *AT91C_SPI_MR|=(AT91C_SPI_MSTR|AT91C_SPI_PS_FIXED|AT91C_SPI_MODFDIS|AT91C_SPI_DLYBCS);
  //主机模式,不分频,固定片选0,禁止错误检测
  *AT91C_SPI_CSR=AT91C_SPI_NCPHA|AT91C_SPI_BITS_8|((unsigned int) 0xFF <<  8);
  //8位数据，传输完成后片选保持，48M/12分频，传输前延时255，连续传输延时255 AT91C_SPI_SCBR

}

/*-----------------------------------------------------------------------
3310调用函数
-----------------------------------------------------------------------*/
/*-----------------------------------------------------------------------
LCD_write_byte    : 使用SPI接口写数据到LCD

输入参数：data    ：写入的数据；
          command ：写数据/命令选择；

-----------------------------------------------------------------------*/
void LCD_write_byte(unsigned char  data, unsigned char command)
  {
   *AT91C_PIOA_CODR|=LCD_CE ;		            // 使能LCD

    if (command == 0)
      {
	*AT91C_PIOA_CODR|= LCD_DC ;                 // 传送命令
	  }
    else
      {
	*AT91C_PIOA_SODR|= LCD_DC ;		    // 传送数据
	  }

    *AT91C_SPI_TDR = data;	                    // 传送数据到SPI寄存器

    while((*AT91C_SPI_SR&AT91C_SPI_TXEMPTY)==0) {;} // 等待数据传送完毕
	
   *AT91C_PIOA_SODR|= LCD_CE ;		            // 关闭LCD
  }
/*-----------------------------------------------------------------------
LCD_set_XY        : 设置LCD坐标函数

输入参数：X       ：0－83
          Y       ：0－5

-----------------------------------------------------------------------*/
void LCD_set_XY(unsigned char  X,unsigned char  Y)
  {
    LCD_write_byte(0x40 | Y, 0);		// column
    LCD_write_byte(0x80 | X, 0);          	// row
  }
/*-----------------------------------------------------------------------
LCD_write_char    : 显示英文字符

输入参数：c       ：显示的字符；
-----------------------------------------------------------------------*/
void LCD_write_char(unsigned char  c)
  {
    unsigned char line;

    c -= 32;

    for (line=0; line<6; line++)
      LCD_write_byte(font6x8[c][line], 1);
  }
/*-----------------------------------------------------------------------
LCD_write_english_String  : 英文字符串显示函数

输入参数：*s      ：英文字符串指针；
          X、Y    : 显示字符串的位置,x 0-83 ,y 0-5	
-----------------------------------------------------------------------*/
void LCD_write_english_string(unsigned char  X,unsigned char  Y,unsigned char  *s)
  {
    LCD_set_XY(X,Y);
    while (*s)
      {
	 LCD_write_char(*s);
	 s++;
      }
  }

/*-----------------------------------------------------------------------
LCD_clear         : LCD清屏函数
-----------------------------------------------------------------------*/
void LCD_clear(void)
  {
    unsigned int i;

    LCD_write_byte(0x0c, 0);	        //普通显示模式		
    LCD_write_byte(0x80, 0);            //设置RAM的X地址	

    for (i=0; i<504; i++)
      LCD_write_byte(0, 1);		//写0数据	
  }
/*-----------------------------------------------------------------------
LCD_init          : 3310LCD初始化
-----------------------------------------------------------------------*/
void LCD_init(void)
  {
    *AT91C_PIOA_CODR|=LCD_RST;          // 产生一个让LCD复位的低电平脉冲
    *AT91C_PIOA_SODR|=LCD_RST;
    *AT91C_PIOA_SODR|=~LCD_CE ;		// 关闭LCD
    *AT91C_PIOA_CODR|=LCD_CE;		// 使能LCD

    LCD_write_byte(0x21, 0);     	// 使用扩展命令设置LCD模式
    LCD_write_byte(0xc8, 0);	        // 设置偏置电压
    LCD_write_byte(0x06, 0);     	// 温度校正
    LCD_write_byte(0x13, 0);     	// 1:48

    *AT91C_PIOA_SODR|=LCD_CE ;		// 关闭LCD
    *AT91C_PIOA_CODR|=LCD_CE;		// 使能LCD

    LCD_write_byte(0x20, 0);	        // 使用基本命令
    LCD_clear();	                // 清屏
    LCD_write_byte(0x0c, 0);	        // 设定显示模式，正常显示

    *AT91C_PIOA_SODR|=LCD_CE ;          // 关闭LCD
  }


int main(void)
{
    PORT_init();
    SPI_init();
    LCD_init();
    LCD_write_english_string(0,0,"WWW.okarm.COM");
    LCD_write_english_string(0,2,"WELCOM YOU");
    LCD_write_english_string(0,4,"PASyong");	
    while(1)
     {
	;
     }
}