51单片机制作MP3 电路图源代码 -

/*C**************************************************************************
* NAME: scheduler.c
*----------------------------------------------------------------------------
* Copyright (c) 2003 Atmel.
*----------------------------------------------------------------------------
* RELEASE: snd1c-refd-nf-4_0_3
* REVISION: 1.8
*----------------------------------------------------------------------------
* PURPOSE:
* This file contains the scheduler routines
*
* NOTES:
* Configuration:
* - SCH_TYPE in scheduler.h header file
* - SCH_TIMER in scheduler.h header file
* Global Variables:
* - gl_cpt_tick: byte in data space
* - gl_kbd_tick: byte in data space
* - gl_mem_tick: byte in data space
*
*****************************************************************************/
/*_____ I N C L U D E S ____________________________________________________*/
#include "config.h" /* system definition */
#include "lib_mcu\timer\timer_drv.h" /* timer definition */
#include "scheduler.h" /* scheduler definition */
/*_____ M A C R O S ________________________________________________________*/
/*_____ D E F I N I T I O N ________________________________________________*/
extern data Byte gl_cpt_tick; /* general tick counter */
extern data Byte gl_kbd_tick; /* keypad tick counter */
extern data Byte gl_mem_tick; /* memory tick counter */
extern data Byte gl_led_tick; /* led tick counter */
extern idata Uint16 gl_act_tick; /* led tick counter */
#if (SCH_TYPE != SCH_FREE)
bit sch_tick_flag;
#endif
/*_____ D E C L A R A T I O N ______________________________________________*/
static void sch_time_init (void);
/*F**************************************************************************
* NAME: sch_scheduler_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Scheduler initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* Task_x_init() and Task_x_fct() are defined in scheduler.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void sch_scheduler_init (void)
{
Task_1_init();
Task_2_init();
Task_3_init();
Task_4_init();
Task_5_init();
Task_6_init();
Task_7_init();
Task_8_init();
Task_9_init();
Task_10_init();
#if (SCH_TYPE != SCH_FREE)
sch_tick_flag = FALSE;
#endif
sch_time_init(); /* start time base */
}
/*F**************************************************************************
* NAME: sch_scheduler
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Task execution scheduler
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void sch_scheduler (void)
{
while (1)
{
Task_1_fct();
Sch_call_next_task();
Task_2_fct();
Sch_call_next_task();
Task_3_fct();
Sch_call_next_task();
Task_4_fct();
Sch_call_next_task();
Task_5_fct();
Sch_call_next_task();
Task_6_fct();
Sch_call_next_task();
Task_7_fct();
Sch_call_next_task();
Task_8_fct();
Sch_call_next_task();
Task_9_fct();
Sch_call_next_task();
Task_10_fct();
Sch_call_next_task();
Sch_new_schedule();
}
}
/*F**************************************************************************
* NAME: sch_default_fct
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* This function does nothing
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void sch_default_fct (void)
{
}
#if (SCH_TIMER == SCH_TIMER0)
/*F**************************************************************************
* NAME: sch_time_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Scheduler time base (timer 0) initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* mode 16-bit Timer, Time counter
* T0_PRIO to be defined in config.h
* TIM_LOW & TIM_HIGH defined in scheduler.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void sch_time_init (void)
{
T0_init(T0_NOT_GATED, T0_TIMER, T0_MODE_1);
TL0 = TIM_LOW;
TH0 = TIM_HIGH;
t0_set_prio(T0_PRIO); /* set-up priority */
T0_enable_int(); /* enable interrupt */
T0_start(); /* start time base */
}
/*F**************************************************************************
* NAME: sch_timer_int
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Timer 0 interrupt function
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* IRQ_T0 defined in extsnd1.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
******************************************************************************/
Interrupt (sch_timer_int(void), IRQ_T0)
{
// T0_stop(); /* stop timer */
TL0 = TIM_LOW; /* reload timer */
TH0 = TIM_HIGH;
// T0_start(); /* restart timer */
#if (SCH_TYPE != SCH_FREE)
sch_tick_flag = TRUE;
#endif
/* increment task tick counters */
gl_cpt_tick++; /* general timer */
gl_kbd_tick++; /* keyboard timer */
gl_mem_tick++; /* memory timer */
gl_led_tick++; /* LED timer */
gl_act_tick++; /* Inactivity TIMER */
}
#elif (SCH_TIMER == SCH_TIMER1)
/*F**************************************************************************
* NAME: sch_time_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Scheduler time base (timer 1) initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* mode 16-bit Timer, Time counter
* T1_PRIO to be defined in config.h
* TIM_LOW & TIM_HIGH defined in scheduler.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void sch_time_init (void)
{
T1_init(T1_NOT_GATED, T1_TIMER, T1_MODE_1);
TL1 = TIM_LOW;
TH1 = TIM_HIGH;
t1_set_prio(T1_PRIO); /* set-up priority */
T1_enable_int(); /* enable interrupt */
T1_start(); /* start time base */
}
/*F**************************************************************************
* NAME: sch_timer_int
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Timer 1 interrupt function
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* IRQ_T1 defined in extsnd1.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
Interrupt (sch_timer_int(void), IRQ_T1)
{
// T1_stop(); /* stop timer */
TL1 = TIM_LOW; /* reload timer */
TH1 = TIM_HIGH;
// T1_start(); /* restart timer */
#if (SCH_TYPE != SCH_FREE)
sch_tick_flag = TRUE;
#endif
gl_cpt_tick++;
}
#elif (SCH_TIMER == SCH_TIMER2)
/*F**************************************************************************
* NAME: sch_time_init
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Scheduler time base (timer 2) initialization
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* mode 16-bit auto-reload
* T2_PRIO to be defined in config.h
* TIM_LOW & TIM_HIGH defined in scheduler.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
*****************************************************************************/
void sch_time_init (void)
{
T2_init(T2_AUTO_RELOAD, T2_TIMER, T2_NOT_GATED);
RCAP2L = TIM_LOW;
RCAP2H = TIM_HIGH;
t2_set_prio(T2_PRIO); /* set-up priority */
T2_enable_int(); /* enable interrupt */
T2_start(); /* start time base */
}
/*F**************************************************************************
* NAME: sch_timer_int
*----------------------------------------------------------------------------
* PARAMS:
*
* return:
*----------------------------------------------------------------------------
* PURPOSE:
* Timer 2 interrupt function
*----------------------------------------------------------------------------
* EXAMPLE:
*----------------------------------------------------------------------------
* NOTE:
* IRQ_T2 defined in extsnd1.h
*----------------------------------------------------------------------------
* REQUIREMENTS:
******************************************************************************/
Interrupt (sch_timer_int(void), IRQ_T2)
{
TF2 = 0; /* ack interrupt */
#if (SCH_TYPE != SCH_FREE)
sch_tick_flag = TRUE;
#endif
gl_cpt_tick++;
}
#endif

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