lpc_lib_spi.c~

使用embest IDE开发工具开发的基于LPC2294 的触摸屏开发

/*
***********************************************************************

       Embest Info&Tech Co., Ltd.  All rights reserved.
                     www.embedinfo.com

***********************************************************************

---------------- file information -------------------------------------

file name: lpc_lib_spi.c
version  : v0
author   : peter pan / [e-mail]
begin    : 2006-02-10
finish   : 2006-02-10
define   : lpc spi controll functions

notes    :

---------------- modify information -----------------------------------
version  :
modify   :
begin    :
finish   :
define   :
-----------------------------------------------------------------------
*/



// (--------------------- compiler condition --------------------------

/*
#ifdef  xxx
        #define  xxx
#endif
*/

// --------------------- compiler condition --------------------------)



/*-------------------------------------------------------------------*/
/*                       include files                               */
/*---------------------------------------------------------------- --*/
#include    "lpc_lib_spi.h"



/*-------------------------------------------------------------------*/
/*                       variable define                             */
/*-------------------------------------------------------------------*/

/*
INT32U      XXXXXX;
*/



/*-------------------------------------------------------------------*/
/*                       extern function declare                     */
/*-------------------------------------------------------------------*/

/*--- define in XXX.c ---
extern  void    XXX();
*/


/*-------------------------------------------------------------------*/
/*                       extern variable declare                     */
/*-------------------------------------------------------------------*/

/*--- USED in XXX() ---
XXX SSS; // used inXXX()
*/



/*-------------------------------------------------------------------*/
/*                       function code                               */
/*-------------------------------------------------------------------*/


/**********************************************************************
* name  :    xxxxx
* func  :    xxxxx
* para  :    xxxx
* ret   :    xxxx

* glob  :    xxxx
* inc   :

* author:
* date  :

* modify:
* comment:
**********************************************************************/
/*void  xxx(xxx xxx)
      {
      }
*/
/**********************************************************************
* name  :    spi_init
* func  :    spi bus init
* para  :    channel: 0/1
	         mode:    0-slave
	         	      1-master
			 onoff:   0-off to gpio
			          1-on
* ret   :    none

* glob  :    xxxx
* inc   :

* author:
* date  :

* modify:
* comment:
**********************************************************************/


void spi_init(INT8U channel, INT8U mode, INT8U onoff)
     {
	  INT32U i,j;

      if (0==channel)
      	 {
          if (0==onoff)
             {         //off the spi
			  //set to input
			   i = PINSEL0;
			      i &= (~SPI0_EN);
			      i |= SPI0_EN_MASK;
			      PINSEL0 = i;
		      //set pin to gpio
			  //set to input
             }
		  else
			 {         //on the spi
		      if (1==mode)
		      	 {    //master mode
		          //set pin to spi
			      i = PINSEL0;
			      i &= (~SPI0_EN_MASK);
			      i |= SPI0_EN;
			      PINSEL0 = i;
//for 7843			   
//			      //set 7843 to GPIO
			      i = PINSEL1;
			      i &= (~P0_X__GPIO_7843_MASK);
			      i |= P0_X__GPIO_7843;
			      PINSEL1 = i;

			      //set SPCR for 7843
			      SPI0_SPCR = SPCR_SPI_7843;
			      
			      //set clock
			       SPI0_SPCCR=78
//for 7843			      
			      //set spi to master
			      //set p0.24 to GPIO
			      i = PINSEL1;
			      i &= (~P0_24__GPIO_024_MASK);
			      i |= P0_24__GPIO_024;
			      PINSEL1 = i;
			      //set GPIO024 output
			      i = IODIR0;
			      i |= (0x01<<24);
			      IODIR0 = i;
			      //set output to 1
			      i = IOSET0;
			      i |= (0x01<<24);
			      IOSET0 = i;

			      //set clock
//			      SPI0_SPCCR = SPI_SPCCR_value_max;
//testing audio cs4334			      
			      SPI0_SPCCR=78;
			      
			      //set SPCR
			      SPI0_SPCR = SPCR_SPI_595;


		      	 }
		      else
		      	 {    //slave mode
		      	 } 			  
			  
		     }
      	 }

     else if (1==channel)
      	 {


      	 }
     }



/**********************************************************************
* name  :    spi_send
* func  :    spi bus send byte
* para  :    chr		--in,	send value
* ret   :    none

* glob  :    xxxx
* inc   :

* author:
* date  :

* modify:
* comment:
**********************************************************************/
void spi_send(INT8U channel, INT8U data_send)
     {
      if (0==channel)
      	 { //spio
	      SPI0_SPDR  = data_send;  //。发送数据通过将数据写入该寄存器来实现
	      while( 0==(SPI0_SPSR & 0x80) );  //最高位为1 时表示一次SPI 数据传输完成
      	                                    //一直等到传输完成
      	 }
      else
      	 { //spi1
	      SPI1_SPDR  = data_send;
	      while( 0==(SPI1_SPSR & 0x80) );
      	        	  
      	 }
     }


void spi_receive(INT8U channel)
     {   
        INT8U      data_receive
      if (0==channel)
      	 { //spio
		 
	       while( 1==(SPI0_SPSR & 0x80) );	 //。发送数据通过将数据写入该寄存器来实现
	                                         //最高位为1 时表示一次SPI 数据传输完成
	         data_receive= SPI0_SPDR;       //一直等到传输完成
      	      return(data_receive);                             
      	 }
      else
      	 { //spi1
	      while( 1==(SPI1_SPSR & 0x80) );	 
	         data_receive= SPI1_SPDR;    
      	      return(data_receive);  
      	        	  
      	 }
     }



/**********************************************************************
* name  :    spi_data_send
* func  :    spi bus send byte
* para  :    channel
	         chr		--in,	send value
* ret   :    none

* glob  :    xxxx
* inc   :

* author:
* date  :

* modify:
* comment:
**********************************************************************/
void spi_data_send(INT8U channel, INT8U data_send)
     {
      if (0==channel)
      	 {
      	  //spi0 init on
          spi_init(0, 1, 1);
          
		  //data send
          spi_send(0, data_send);
			
		  //return
       	 }

      if (1==channel)
      	 {
      	  //spi0 init on
          spi_init(1, 1, 1);
          
		  //data send
           spi_send(1, data_send);

		  //return
       }
      
void spi_data_receive(INT8U channel)
     {
      if (0==channel)
      	 {
      	  //spi0 init on
          spi_init(0, 1, 1);
          
		  //data send
          spi_receive(0);
			
		  //return

      	 }

      if (1==channel)
      	 {
      	  //spi0 init on
          spi_init(1, 1, 1);
          
		  //data send
           spi_receive(1);

		  //return

      	 }
     		
     	
     }