bsp.c

详细介绍了arm7-at91r40008,的开发全过程

/*
*********************************************************************************************************
*                                               Atmel AT91
*                                       EB40A Board Support Package
*
*                         (c) Copyright 1992-2003, Jean J. Labrosse, Weston, FL
*                                          All Rights Reserved
*
*
* File : BSP.C
* By   : Jean J. Labrosse
*********************************************************************************************************
*/

#include "../ucos_ii/includes.h"


/*
*********************************************************************************************************
*                                         BSP INITIALIZATION
*
* Description : This function should be called by your application code before you make use of any of the
*               functions found in this module.
*               
* Arguments   : none
*********************************************************************************************************
*/

void  BSP_Init (void)//在这里要禁止一切中断
{
    at91_pio_open ( &PIO_DESC, LED_MASK, PIO_OUTPUT );
    
	  at91_irq_close(WDI_ID);//add by zxd
    Tmr_TickInit();
   
}




/*
*********************************************************************************************************
*                                       TICKER INITIALIZATION
*
* Description : This function is called to initialize uC/OS-II's tick source (typically a timer generating
*               interrupts every 1 to 100 mS).
*               
* Arguments   : none
*
* Notes       : TC0_CMR:
*
*                 B2  B1  B0   010   MCLK / 32
*                 B3           0     Counter is incremented on RISING edge
*                 B5  B4       00    Clock is NOT gated
*                 B6           0     Counter clock is NOT stopped  on RC
*                 B7           0     Counter clock is NOT disabled on RC
*
*                 B9  B8       00    No externel event edge selection
*                 B11 B10      01    No externel event      selection
*                 B12          0     External event has no effect on TIOA
*                 B14          1     RC Compare resets the counter and starts the counter clock
*                 B15          1     WAVEFORM mode is enabled
*                 
*                 B17 B16      10    Clear TIOA when RA compares
*                 B19 B18      01    Set   TIOA when RC compares
*                 B21 B20      00    External event   has NO effect on TIOA
*                 B23 B22      00    Software trigger has NO effect on TIOA
*                 
*                 B25 B24      10    Clear TIOA when RA compares
*                 B27 B26      01    Set   TIOA when RC compares
*                 B29 B28      00    External event   has NO effect on TIOA
*                 B31 B30      00    Software trigger has NO effect on TIOA
*********************************************************************************************************
*/

void  Tmr_TickInit (void)
{

  
	watchdog_init();

}


/*
*********************************************************************************************************
*                                         TIMER #0 IRQ HANDLER
*
* Description : This function handles the timer interrupt that is used to generate TICKs for uC/OS-II.
*               
* Arguments   : none
*********************************************************************************************************
*/

void  Tmr_TickISR_Handler (void)
{
	volatile  INT32U  sr;
	
	sr = WD_SR;
	AIC_ICCR = 0x80;
	AIC_EOICR = AIC_EOICR;
	WD_CR = WD_RSTKEY ; 
	
    OSTimeTick();                       /* If the interrupt is from the tick source, call OSTimeTick() */
                     
}