.include hardware.inc
.define P_SIO_Data  0x701A
.define LOAD   0x0004		//iob2
.define CLK    0x0001       //iob0
.define DIN    0x0002       //iob1
//.define LOAD   0x0002		  //iob1，檢測(cè)用
//.define CLK    0x0004       //iob2，檢測(cè)用
//.define DIN    0x0001       //iob0，檢測(cè)用
.code
//===================================================================================================
//函數(shù)：Init_SIO()
//功能：初始化串行輸出
//===================================================================================================
.public _Init_SIO
_Init_SIO:.PROC
  R1=0x00d9;                   //設(shè)置為輸出端口
  [P_SIO_Ctrl]=r1;             //B0,B1分別為sclk，sdata引腳，串行地址無(wú)
  RETF
  .ENDP
//======================================================================================================
//函數(shù)：void    sent_LED( unsigned int n )
//功能：輸出16位數(shù)據(jù)到MAX7219
//輸入：16位數(shù)據(jù)
//======================================================================================================
.public _sent_LED_Bake
_sent_LED_Bake:.proc
  INT OFF                        //關(guān)中斷
  PUSH bp TO  [sp];  		      //彈出入口參數(shù)共兩個(gè)入口參數(shù)
    bp = sp + 1   
  r2 = [bp+3]                  //取出第一個(gè)入口參數(shù)
 
  r3=[P_IOB_Data]			   //LOAD置低
  r4=LOAD^0xffff
  r3=r3&r4
  [P_IOB_Data]	=r3
//  R1=0x00d9;                   //設(shè)置為輸出端口
//  [P_SIO_Ctrl]=r1;             //B0,B1分別為sclk，sdata引腳，串行地址無(wú)
  r3=r2;		          
  r3=r3 LSR 4;             //高8位
  r3=r3 LSR 4;			  
  r2=r2&0x00ff;            //低8位
  r1=0x0000		               //寫入串行輸入輸出啟動(dòng)端口
  [P_SIO_Start]=r1;
 
 //高8位傳輸  
  [P_SIO_Data]=r3;			//寫入傳送數(shù)據(jù)
  call  L_busy				//忙否？處理
 //低8位傳輸      
  [P_SIO_Data]=r2;
  call  L_busy				  //忙否？處理
  r3=[P_IOB_Data]			   //LOAD置高
  r3=r3|LOAD
  [P_IOB_Data]	=r3
  INT IRQ,FIQ					//開中斷
  POP bp FROM [sp]
  retf
.endp
.public L_busy
L_busy:.proc
       ?L_busy:	
       r1=0x0080		      //讀出占用標(biāo)志位busy
       test r1,[P_SIO_Start]  //忙，沒(méi)有寫完
       jnz ?L_busy			  //繼續(xù)檢測(cè)
       [P_SIO_Stop]=r1;       //寫入任意一個(gè)值，停止
       retf
   .endp
//=============================================================================================
//相關(guān)LOAD ,CLK, DIN位改變函數(shù)：
//=============================================================================================  
.public _Set_LOAD_Low
_Set_LOAD_Low:.proc  
  push r3,r4 to [sp]
  r3=[P_IOB_Data]			   //LOAD置低
  r4=LOAD^0xffff
  r3=r3&r4
  [P_IOB_Data]	=r3
  pop r3,r4 from [sp]
  retf;
.endp
.public _Set_LOAD_High
_Set_LOAD_High:.proc
  push r3,r4 to [sp]
  r3=[P_IOB_Data]			   //LOAD置高
  r3=r3|LOAD
  [P_IOB_Data]	=r3
  pop r3,r4 from [sp]
  retf
.endp
.public _Set_CLK_Low
_Set_CLK_Low:.proc  
  push r3,r4 to [sp]
  r3=[P_IOB_Data]			   //CLK置低
  r4=CLK^0xffff
  r3=r3&r4
  [P_IOB_Data]	=r3
   pop r3,r4 from [sp]
  retf;
.endp
.public _Set_CLK_High
_Set_CLK_High:.proc
 push r3,r4 to [sp]
  r3=[P_IOB_Data]			   //CLK置高
  r3=r3|CLK
  [P_IOB_Data]	=r3
 pop r3,r4 from [sp]
  retf
.endp
.public _Set_DIN_Low
_Set_DIN_Low:.proc 
  push r3,r4 to [sp] 
  r3=[P_IOB_Data]			   //DIN置低
  r4=DIN^0xffff
  r3=r3&r4
  [P_IOB_Data]	=r3
  pop r3,r4 from [sp]
  retf;
.endp
.public _Set_DIN_High
_Set_DIN_High:.proc
  push r3,r4 to [sp]
  r3=[P_IOB_Data]			   //DIN置高
  r3=r3|DIN
  [P_IOB_Data]	=r3
   pop r3,r4 from [sp]
  retf
.endp