//*********************************************
//文件名字:UARTFUNCTION
//實現功能：存放與UART有關的自定義函數 _UARTinit  _UARTsend
//*********************************************
.DEFINE P_IOB_Data				0x7005
.DEFINE P_IOB_Buffer			0x7006
.DEFINE P_IOB_Dir				0x7007
.DEFINE P_IOB_Attrib			0x7008
.DEFINE P_UART_Command1			0x7021
.DEFINE P_UART_Command2			0x7022
.DEFINE P_UART_Data				0x7023
.DEFINE	P_UART_BaudScalarLow	0x7024
.DEFINE	P_UART_BaudScalarHigh	0x7025
.DEFINE P_Watchdog_Clear		0x7012
.CODE
.public _UARTinit
.public _UARTsend
 //********************************
 //程序名字：_UARTinit
 //功能：初使化UART 9600 偶校驗 不允許中斷
 //入口參數：無
 //影響資源：R1
 //返回值：無
 //********************************* 
_UARTinit: 
       R1=[P_IOB_Data]
       r1=r1&0xff7f
       r1=r1|0x0400
       [P_IOB_Dir]=r1
       r1=r1|0x0480
       [P_IOB_Attrib]=r1
       [P_IOB_Data]=r1
       r1=0x00
       [P_UART_BaudScalarLow]=r1
       r1=0x05
       [P_UART_BaudScalarHigh]=r1
       r1=0x000c
       [P_UART_Command1]=r1
       r1=0xc0
       [P_UART_Command2]=r1
       r1=01
       [P_Watchdog_Clear]=r1
      RETF
 //********************************
 //程序名字：_UARTsend
 //功能：串行發送一個字節的數據
 //入口參數：R1
 //影響資源：R1、R2
 //返回值：無
 //*********************************      
  _UARTsend:
      r2=[P_UART_Command2]
       test r2,0x40
       jz _UARTsend
        r2=01
       [P_Watchdog_Clear]=r2
       [P_UART_Data]=r1
       retf