www.pudn.com > Bit1611_demo_code.rar > TIMER.C

/* ********************************************************************** 
 
         Copyright (c) 2002-2006 Beyond Innovation Technology Co., Ltd 
 
        All rights are reserved. Reproduction in whole or in parts is 
    prohibited without the prior written consent of the copyright owner. 
   ---------------------------------------------------------------------- 
 
    Module: TIMER.C 
 
    Purpose: Implementation of TIMER module. 
 
    Version: 0.01                                   11:33AM  2005/11/17 
 
    Compiler: Keil 8051 C Compiler v8.01 
 
    Reference: 
 
   ---------------------------------------------------------------------- 
    Modification: 
 
    R0.01 11:33AM  2005/11/17 Jeffrey Chang 
    Reason: 
        1. Original. 
    Solution: 
 
   ********************************************************************** */ 
 
#define _TIMER_C_ 
 
/* ------------------------------------ 
    Header Files 
   ------------------------------------ */ 
#include "common.h" 
#include "led.h" 
#include "key.h" 
#include "mcu.h" 
#include "menu.h" 
#include "platform.h" 
#include "timer.h" 
#include "yuv.h" 
 
#if (IR_CFG != IR_00_UNUSE) 
    #include "ir.h" 
#endif 
 
/* ------------------------------------ 
    Macro Definitions 
   ------------------------------------ */ 
 
/* ------------------------------------ 
    Type Definitions 
   ------------------------------------ */ 
 
 
/* ------------------------------------ 
    Variables Definitions 
   ------------------------------------ */ 
 
 
/* ------------------------------------ 
    Function Prototypes 
   ------------------------------------ */ 
 
 
/* ------------------------------------------------------------------- 
    Name: TIMER_Init - To initialize TIMER module. 
    Purpose: 
    Passed: None. 
    Returns: None. 
    Notes: 
 
    Reference: [3]87, [3]89 
   ------------------------------------------------------------------- */ 
void TIMER_Init (void) 
{ 
    IP  = 0x2A; 
 
 
    // [3]64, 89 
    TMOD            = TIMER_MODE; 
 
    // Timer Mode 1 (16-bit) 
    TIMER_COUNTER_H = (65536 - MACHINE_PER_TICK) / 256; 
    TIMER_COUNTER_L = (65536 - MACHINE_PER_TICK) % 256; 
 
    /* [3]89 Timer 0/1 start running */ 
    TIMER_RUN       = TRUE; 
 
    /* [3]87 Enable Timer 0/1 overflow interrupt */ 
    TIMER_ENABLE    = TRUE; 
 
    /* Initialize Variables */ 
    wTIMER_TickCnt  = 0; 
 
    wTIMER_BurnInTick = 0; 
} /* TIMER_Init */ 
 
 
/* ------------------------------------------------------------------- 
    Name: TIMER_ISR - 
    Purpose: System Timer Interrupt Service Routine (ISR). 
    Passed: None 
    Returns: None. 
    Notes: 
 
    Reference: [2]19 
   ------------------------------------------------------------------- */ 
void TIMER_ISR (void) interrupt TIMER_INT   using TIMER_USING 
{ 
    // Timer Mode 1 (16-bit) 
    TIMER_COUNTER_H = (65536 - MACHINE_PER_TICK) / 256; 
    TIMER_COUNTER_L = (65536 - MACHINE_PER_TICK) % 256; 
 
    wTIMER_TickCnt++; 
 
 
    /* .................................... 
       KEY module 
       .................................... */ 
    /* To scan the keypad every 8 System Ticks since 
       the debounce needs 48 ms at least                */ 
    // Period = 8 Ticks 
    if ((wTIMER_TickCnt & 0x0007) == 0) 
        KEY_Scan(); 
 
    #if (KEY_VR_AIN21) 
    if (bKEY_VR_ADJUSTMENT) 
        bKEY_VR_ADJUSTMENT--; 
    #endif 
 
    /* .................................... 
       TIMER module 
       .................................... */ 
    if (bTIMER_Tick)                  
        bTIMER_Tick--; 
 
    if (wTIMER_Tick) 
        wTIMER_Tick--; 
 
    /* .................................... 
       DISPATCH module 
       .................................... */ 
    if (wTIMER_BurnInTick) 
        wTIMER_BurnInTick--; 
 
    /* .................................... 
       MENU module 
       .................................... */ 
    if (wMENU_Tick) 
        wMENU_Tick--; 
 
 
    /* .................................... 
       LED module 
       .................................... */ 
    if (fLED_RED_Blink) 
    { 
        // Period = 128 Ticks 
        // 50% duty cycle 
        if ((wTIMER_TickCnt & 0x007F) == 0x0000) 
            LED_RED_OFF; 
 
        if ((wTIMER_TickCnt & 0x007F) == 0x0040) 
            LED_RED_ON; 
    } 
 
 
    if (fLED_GREEN_Blink) 
    { 
        // Period = 128 Ticks 
        // 50% duty cycle 
        if ((wTIMER_TickCnt & 0x007F) == 0x0010) 
            LED_GREEN_OFF; 
 
        if ((wTIMER_TickCnt & 0x007F) == 0x0050) 
            LED_GREEN_ON; 
    } 
 
} /* TIMER_ISR */ 
 
 
/* ------------------------------------------------------------------- 
    Name: TIMER_DelayMS - 
    Purpose: To wait a moment in milli-seconds. 
    Passed: 
        wMS = 1..65530                  @ System tick = 6ms 
 
        Delay duration = 1 Tick         @ wMS = 1 
                       = 6 ms           @ wMS = 1 
        Delay duration = 10922 Ticks    @ wMS = 65530 
                       = 65532 ms       @ wMS = 65530 
 
    Returns: None. 
    Notes: 
    Reference: [2]19 
   ------------------------------------------------------------------- */ 
void TIMER_DelayMS (UW16 wMS) 
{ 
    TIMER_RUN   = FALSE; 
 
    wTIMER_Tick = (wMS + MS_PER_TICK - 1) / MS_PER_TICK; 
 
    TIMER_RUN   = TRUE; 
 
    while (wTIMER_Tick)         
        ;                       
} /* TIMER_DelayMS */ 
 
 
/* ------------------------------------------------------------------- 
    Name:  - 
    Purpose: . 
    Passed: None. 
    Returns: None. 
    Notes: 
   ------------------------------------------------------------------- */ 
 
 
/* ********************************************************************** 
 
    Description: 
 
 
   ********************************************************************** */ 
 
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