ARM COMPILER V2.00f,  main                                                                 20/02/05  10:38:14  PAGE 1   


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

stmt  level    source

    1          /************************************************************/
    2          /* PROJECT NAME: GPIO                                       */
    3          /* Project:      LPC2100 Training course                    */
    4          /* Engineer:     T Martin        tmartin@hitex.co.uk        */
    5          /* Filename:     main.c                                     */
    6          /* Language:     C                                          */
    7          /* Compiler:     Keil ARM   V2.0b                           */
    8          /* Assembler:                                               */
    9          /*                                                          */
   10          /************************************************************/
   11          /* COPYRIGHT: Hitex UK Ltd      2005                        */
   12          /* LICENSE:   THIS VERSION CREATED FOR FREE DISTRIBUTION    */
   13          /************************************************************/
   14          /* Function:                                                */
   15          /*                                                          */
   16          /* Example                                                  */
   17          /*                                                          */
   18          /* Demonstrates Use of the LPC2100 GPIO                     */
   19          /*                                                          */  
   20          /* Oscillator frequency 12.000 Mhz                          */
   21          /* Target board Keil MCB21000                               */
   22          /************************************************************/
   23          
   24          #include <LPC21xx.H> 
   25          
   26          void ChangeGPIOPinState(unsigned int state);
   27          
   28          
   29          int main(void)
   30          {
   31   1      unsigned int delay;
   32   1      unsigned int flasher = 0x00010000;                      // define locals
   33   1      
   34   1      IODIR1              = 0x00FF0000;                       // set all ports to output
   35   1      
   36   1      while(1)
   37   1      {
   38   2      
   39   2      for(delay = 0;delay<0xA0000;delay++)                    //simple delay loop
   40   2      {
   41   3      ;
   42   3      }
   43   2      
   44   2      ChangeGPIOPinState(flasher);                            //set the state of the ports
   45   2      flasher             = flasher <<1;                      //shift the active led
   46   2      if(flasher&0x01000000) 
   47   2          flasher         = 0x00010000;                       //Increment flasher led and test for overflow
   48   2      
   49   2      }
   50   1      }
   51          
   52          void ChangeGPIOPinState(unsigned int state)
   53          {
   54   1      IOCLR1              = ~state;                           //clear output pins
   55   1      IOSET1              =  state;                           //set output pins
   56   1      
   57   1      }
   58          
   59          
ARM COMPILER V2.00f,  main                                                                 20/02/05  10:38:14  PAGE 2   

ASSEMBLY LISTING OF GENERATED OBJECT CODE



*** EXTERNALS:
 EXTERN NUMBER (__startup)



*** PUBLICS:
 PUBLIC         ChangeGPIOPinState?T
 PUBLIC         main



*** CODE SEGMENT '?PR?main?main':
   29: int main(void)
 00000000  B500      PUSH        {LR}
   30: {
 00000002            ; SCOPE-START
   32: unsigned int flasher = 0x00010000;                      // define locals
 00000002  4800      LDR         R4,=0x10000
 00000004  ---- Variable 'flasher' assigned to Register 'R4' ----
   34: IODIR1                 = 0x00FF0000;                       // set all ports to output
 00000004  4800      LDR         R1,=0xFF0000
 00000006  4800      LDR         R0,=0xE0028018
 00000008  6001      STR         R1,[R0,#0x0]
   39: for(delay = 0;delay<0xA0000;delay++)                    //simple delay loop
 0000000A          L_9:
 0000000A  2000      MOV         R0,#0x0
 0000000C  ---- Variable 'delay' assigned to Register 'R0' ----
   42: }
 0000000C          L_5:
 0000000C  3001      ADD         R0,#0x1
 0000000E  4800      LDR         R1,=0xA0000
 00000010  4288      CMP         R0,R1 ; delay
 00000012  D3FB      BCC         L_5  ; T=0x0000000C
   44: ChangeGPIOPinState(flasher);                            //set the state of the ports
 00000014  1C20      MOV         R0,R4
 00000016  F7FF      BL          ChangeGPIOPinState?T  ; T=0x0001  (1)
 00000018  FFF3      BL          ChangeGPIOPinState?T  ; T=0x0001  (2)
   45: flasher             = flasher <<1;                      //shift the active led
 0000001C  0064      LSL         R4,R4,#0x1 ; flasher
   46: if(flasher&0x01000000) 
 0000001E  4800      LDR         R0,=0x1000000
 00000020  4204      TST         R4,R0 ; flasher
 00000022  D0F2      BEQ         L_9  ; T=0x0000000A
   47:     flasher         = 0x00010000;                       //Increment flasher led and test for overflow
 00000024  4800      LDR         R4,=0x10000
   49: }
 00000026  E7F0      B           L_9  ; T=0x0000000A
 00000028            ; SCOPE-END
 00000028  BC08      POP         {R3}
 0000002A  4718      BX          R3
 0000002C          ENDP ; 'main'


*** CODE SEGMENT '?PR?ChangeGPIOPinState?T?main':
   52: void ChangeGPIOPinState(unsigned int state)
 00000000  1C03      MOV         R3,R0 ; state
 00000002  ---- Variable 'state' assigned to Register 'R3' ----
   54: IOCLR1                 = ~state;                           //clear output pins
 00000002  1C19      MOV         R1,R3 ; state
 00000004  43CA      MVN         R2,R1 ; state
 00000006  4800      LDR         R0,=0xE002801C
 00000008  6002      STR         R2,[R0,#0x0]
   55: IOSET1                 =  state;                           //set output pins
 0000000A  4800      LDR         R0,=0xE0028014
 0000000C  6001      STR         R1,[R0,#0x0]
   57: }
 0000000E  4770      BX          R14
 00000010          ENDP ; 'ChangeGPIOPinState?T'


ARM COMPILER V2.00f,  main                                                                 20/02/05  10:38:14  PAGE 3   


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


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