t0_m1_c_gs.lst

C51 TIMER 0的使用 Timer_0_mode_1_counter_gate_soft

C51 COMPILER V7.06   T0_M1_C_GS                                                            04/06/2004 13:58:50 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE T0_M1_C_GS
OBJECT MODULE PLACED IN t0_m1_c_gs.OBJ
COMPILER INVOKED BY: C:\KEIL\C51\BIN\C51.EXE t0_m1_c_gs.c BROWSE DEBUG OBJECTEXTEND TABS(3)

stmt level    source

   1          /**
   2           * @file $RCSfile: t0_m1_c_gs.c,v $
   3           *
   4           * Copyright (c) 2004 Atmel.
   5           *
   6           * Please read file license.txt for copyright notice.
   7           *
   8           * @brief This file is an example to use timer0 in mode 1.
   9           *
  10           * This file can be parsed by Doxygen for automatic documentation
  11           * generation.
  12           * Put here the functional description of this file within the software
  13           * architecture of your program.
  14           *
  15           * @version $Revision: 1.0 $ $Name:  $
  16           */
  17          
  18          /* @section  I N C L U D E S */
  19          #include "reg_c51.h"
  20          
  21          
  22          /**
  23           * FUNCTION_PURPOSE: This file set up timer 0 in mode 1 (16 bits counter) 
  24           * with a software gate. The counter count up at eatch negative transitions
  25           * The 16-bits register consist of all 8 bits of TH0 and all 8 bits   
  26           * of TL0.
  27           * FUNCTION_INPUTS: P3.4(T0) must be an external clock
  28           * FUNCTION_OUTPUTS: void
  29           */
  30          void main(void)
  31          {
  32   1         TMOD &= 0xF0;              /* Timer 0 mode 1 counter with software gate */
  33   1         TMOD |= 0x05;              /* GATE0=0; C/T0#=1; M10=0; M00=1; */
  34   1         
  35   1         TH0 = 0x00;                /* init values */
  36   1         TL0 = 0x00;    
  37   1         ET0=1;                     /* enable timer0 interrupt */
  38   1         EA=1;                      /* enable interrupts */
  39   1         TR0=1;                     /* timer0 run */
  40   1         while(1);                  /* endless  */
  41   1      }
  42          
  43          
  44          /**
  45           * FUNCTION_PURPOSE: timer0 interrupt
  46           * FUNCTION_INPUTS: void
  47           * FUNCTION_OUTPUTS: P1.0 toggle period = 2 * 65536 cycles * P3.4(T0) period  
  48           */
  49          void it_timer0(void) interrupt 1 /* interrupt address is 0x000b */
  50          {
  51   1         TF0 = 0;                   /* reset  interrupt flag (already done by hardware)*/
  52   1         P1_0 = ~P1_0;              /* P1.0 toggle when interrupt. */
  53   1      }


C51 COMPILER V7.06   T0_M1_C_GS                                                            04/06/2004 13:58:50 PAGE 2   

MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     24    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)