serial.lst

Keil CARM Examples 很好的例子

ARM COMPILER V2.00f,  serial                                                               19/02/05  10:02:20  PAGE 1   


ARM COMPILER V2.00f, COMPILATION OF MODULE serial
OBJECT MODULE PLACED IN serial.OBJ
COMPILER INVOKED BY: C:\Keil\ARM\BIN\CA.exe serial.c THUMB OPTIMIZE(7,SPEED) BROWSE DEBUG TABS(4) 

stmt  level    source

    1          /************************************************************/
    2          /* PROJECT NAME: Standard IO                                */
    3          /* Project:      LPC2100 Training course                    */
    4          /* Engineer:     T Martin    [e-mail]            */
    5          /* Filename:     serial.c                                   */
    6          /* Language:     C                                          */
    7          /* Compiler:     Keil ARM   V2.00b                          */
    8          /* Assembler:                                               */
    9          /*                                                          */
   10          /************************************************************/
   11          /* COPYRIGHT: Hitex UK Ltd      2005                        */
   12          /* LICENSE:   THIS VERSION CREATED FOR FREE DISTRIBUTION    */
   13          /************************************************************/
   14          /* Function:                                                */
   15          /*                                                          */
   16          /* Example Standard I/O program for LPC2100                 */
   17          /*                                                          */
   18          /* Demonstrates interfacing STDIO library function          */
   19          /* to low level drivers                                     */
   20          /*                                                          */  
   21          /* Oscillator frequency 12.000 Mhz                          */
   22          /* Target board Keil MCB2100                                */
   23          /************************************************************/
   24          
   25          #define CR     0x0D
   26          
   27          #include <LPC21xx.H> 
   28          int putchar (int ch);
   29          
   30          int putchar (int ch) 
   31          {                    /* Write character to Serial Port  */
   32   1      
   33   1        if (ch == '\n')  
   34   1        {
   35   2          while (!(U0LSR & 0x20));
   36   2          U0THR = CR;                          /* output CR */
   37   2        }
   38   1        while (!(U0LSR & 0x20));
   39   1      
   40   1        
   41   1        return (U0THR = ch);
   42   1      }
   43          
   44          
ARM COMPILER V2.00f,  serial                                                               19/02/05  10:02:20  PAGE 2   

ASSEMBLY LISTING OF GENERATED OBJECT CODE



*** PUBLICS:
 PUBLIC         putchar?T



*** CODE SEGMENT '?PR?putchar?T?serial':
   30: int putchar (int ch) 
 00000000  ---- Variable 'ch' assigned to Register 'R0' ----
   33:   if (ch == '\n')  
 00000000  280A      CMP         R0,#0xA ; ch
 00000002  D107      BNE         L_9  ; T=0x00000014
   35:     while (!(U0LSR & 0x20));
 00000004          L_2:
 00000004  4800      LDR         R1,=0xE000C014
 00000006  7809      LDRB        R1,[R1,#0x0]
 00000008  2220      MOV         R2,#0x20
 0000000A  4211      TST         R1,R2
 0000000C  D0FA      BEQ         L_2  ; T=0x00000004
   36:     U0THR = CR;                          /* output CR */
 0000000E  220D      MOV         R2,#0xD
 00000010  4800      LDR         R1,=0xE000C000
 00000012  700A      STRB        R2,[R1,#0x0]
   38:   while (!(U0LSR & 0x20));
 00000014          L_9:
 00000014          L_6:
 00000014  4800      LDR         R1,=0xE000C014
 00000016  7809      LDRB        R1,[R1,#0x0]
 00000018  2220      MOV         R2,#0x20
 0000001A  4211      TST         R1,R2
 0000001C  D0FA      BEQ         L_6  ; T=0x00000014
   41:   return (U0THR = ch);
 0000001E  4800      LDR         R1,=0xE000C000
 00000020  7008      STRB        R0,[R1,#0x0]
 00000022  0600      LSL         R0,R0,#0x18 ; ch
 00000024  0E00      LSR         R0,R0,#0x18
   42: }
 00000026  4770      BX          R14
 00000028          ENDP ; 'putchar?T'



Module Information          Static
----------------------------------
  code size            =    ------
  data size            =    ------
  const size           =    ------
End of Module Information.


ARM COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)