bsp.c

ADS下基于AT91SAM7X256-EK的可以运行的uCOS-II源码

* Arguments   : led    is the number of the LED to control
*                      0    indicates that you want ALL the LEDs to be ON
*                      1    turns ON LED1 on the board
*                      .
*                      .
*                      4    turns ON LED4 on the board
*********************************************************************************************************
*/

void  LED_On (INT8U led)
{
   
}

void LED_TurnOff(unsigned int led)
{       
  AT91F_PIO_SetOutput( AT91C_BASE_PIOB, led) ;
}

/*
*********************************************************************************************************
*                                             LED OFF
*
* Description : This function is used to control any or all the LEDs on the board.
*               
* Arguments   : led    is the number of the LED to turn OFF
*                      0    indicates that you want ALL the LEDs to be OFF
*                      1    turns OFF LED1 on the board
*                      .
*                      .
*                      4    turns OFF LED4 on the board
*********************************************************************************************************
*/

void  LED_Off (INT8U led)
{

}

void LED_TurnOn(unsigned int led)
{       
  AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, led);        
}
/*
*********************************************************************************************************
*                                             LED TOGGLE
*
* Description : This function is used to toggle any or all the LEDs on the board.
*               
* Arguments   : led    is the number of the LED to toggle
*                      0    indicates that you want ALL the LEDs to be toggle
*                      1    toggles LED1 on the board
*                      .
*                      .
*                      4    toggles LED4 on the board
*********************************************************************************************************
*/

void  LED_Toggle (INT8U led)
{

}

/*
*********************************************************************************************************
*                                           IRQ ISR HANDLER
*
* Description : This function is called by OS_CPU_IRQ_ISR() to determine the source of the interrupt
*               and process it accordingly.
*
* Arguments   : none
*********************************************************************************************************
*/
void  OS_CPU_IRQ_ISR_Handler (void)
{
    BSP_PFNCT  pfnct;
	
#if 1  
	
    pfnct = (BSP_PFNCT)AT91C_BASE_AIC->AIC_IVR;     /* Read the interrupt vector from the VIC          */
    if (pfnct != (BSP_PFNCT)0) {                    /* Make sure we don't have a NULL pointer          */
        (*pfnct)();                                 /* Execute the ISR for the interrupting device     */
    }
#else
    pfnct = (BSP_PFNCT)AT91C_BASE_AIC->AIC_IVR;     /* Read the interrupt vector from the VIC          */
    while (pfnct != (BSP_PFNCT)0) {                 /* Make sure we don't have a NULL pointer          */
      (*pfnct)();                                   /* Execute the ISR for the interrupting device     */
        pfnct = (BSP_PFNCT)AT91C_BASE_AIC->AIC_IVR; /* Read the interrupt vector from the VIC          */
    }
#endif    
}

/*
*********************************************************************************************************
*                                           FIQ ISR HANDLER
*
* Description : This function is called by OS_CPU_FIQ_ISR() to determine the source of the interrupt
*               and process it accordingly.
*
* Arguments   : none
*********************************************************************************************************
*/

void  OS_CPU_FIQ_ISR_Handler (void)
{
    BSP_PFNCT  pfnct;
#if 1   
	
    pfnct = (BSP_PFNCT)AT91C_BASE_AIC->AIC_FVR;     /* Read the interrupt vector from the VIC               */
    if (pfnct != (BSP_PFNCT)0) {                    /* Make sure we don't have a NULL pointer               */
        (*pfnct)();                                 /* Execute the ISR for the interrupting device          */
    }
#else    
    pfnct = (BSP_PFNCT)AT91C_BASE_AIC->AIC_FVR;     /* Read the interrupt vector from the VIC               */
    while (pfnct != (BSP_PFNCT)0) {                 /* Make sure we don't have a NULL pointer               */
      (*pfnct)();                                   /* Execute the ISR for the interrupting device          */
        pfnct = (BSP_PFNCT)AT91C_BASE_AIC->AIC_FVR; /* Read the interrupt vector from the VIC               */
    }
#endif    
}

/*
*********************************************************************************************************
*                                         TICKER INITIALIZATION
*
* Description : This function is called to initialize uC/OS-II's tick source which uses the PIT
*               (typically a timer generating interrupts every 1 to 100 mS).
*               
* Arguments   : none
*
* Note(s)     : 1) PIT Interrupt frequency:
*
*                         MCLK        1
*               Freq =    ---- * -----------
*                          16     (PIV + 1)
*
*
*                         MCLK      1
*               PIV  =  ( ---- * ------ ) - 1
*                          16     Freq
*
*               Where:
*                    MCLK = 48 MHz (i.e 48,000,000)
*                    Freq = Desired frequency (i.e. OS_TICKS_PER_SEC) 
*********************************************************************************************************
*/

void  Tmr_TickInit (void)
{
    INT32U  counts;

                                                /* Set the vector address for PIT                      */
    AT91C_BASE_AIC->AIC_SVR[AT91C_ID_SYS] = (INT32U)Tmr_TickISR_Handler;
    AT91C_BASE_AIC->AIC_SMR[AT91C_ID_SYS] = AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE
                                          | AT91C_AIC_PRIOR_LOWEST; 
    AT91C_BASE_AIC->AIC_ICCR              = 1 << AT91C_ID_SYS;
    AT91C_BASE_AIC->AIC_IECR              = 1 << AT91C_ID_SYS;

    counts                                = (48000000 / 16 / OS_TICKS_PER_SEC) - 1;
  	AT91C_BASE_PITC->PITC_PIMR            = AT91C_PITC_PITEN | AT91C_PITC_PITIEN | counts;
}
/*
*********************************************************************************************************
*                                           PIT IRQ HANDLER
*
* Description : This function handles the PIT interrupt that is used to generate TICKs for uC/OS-II.
*               
* Arguments   : none
*********************************************************************************************************
*/

static  void  Tmr_TickISR_Handler (void)
{
     volatile static INT32U  status;
    AT91C_BASE_AIC->AIC_IVR   = 0;            /* Debug variant of vector read (protect mode is used)   */
    AT91C_BASE_AIC->AIC_ICCR  = AT91C_ID_SYS; /* Clear  timer #0 interrupt                             */
   	AT91C_BASE_AIC->AIC_EOICR = 0;            /* Signal end of interrupt                               */
    
    
	//OSTimeTick();

    
	if((AT91PS_PITC)AT91C_BASE_PITC->PITC_PISR)
    {
    	status                    = AT91C_BASE_PITC->PITC_PIVR;
    	OSTimeTick();                             // Tell uC/OS-II about clock tick                        
	}
	else
	{
		if((int)((AT91PS_DBGU)AT91C_BASE_DBGU->DBGU_CSR) & (int)0x01)
		{
			if(pRxdt==&RXDT[19])
			{
				pRxdt=RXDT;
			}
			*(++pRxdt)=(int)(AT91PS_DBGU)AT91C_BASE_DBGU->DBGU_RHR;
			OSSemPost (pE_Key);
		}
	}
}

//---------------------------------------------------------------------------------------------------------
void  time_delay(int  dly)
{  
	int  i;
	for(; dly>0; dly--) 
		for(i=0; i<500; i++);
}

//--------------------------------------------------------
void pri_info(void)
{		
	AT91F_DBGU_Printk("\n\r    ================================================");
	AT91F_DBGU_Printk("\n\r    |         欢迎使用深圳英贝德公司的产品         |");
	AT91F_DBGU_Printk("\n\r    |          SAM7X256 uCOS-II的演示测试          |");
	AT91F_DBGU_Printk("\n\r    |     更多的帮助请到 http://www.szembed.com    |");		
	AT91F_DBGU_Printk("\n\r    ================================================\n\r\n\r");
}


//*----------------------------------------------------------------------------
//* 函数名： AT91F_DBGU_GetStatus_zzf
//* 功能：获得USART（DBGU，US0，US1）通道状态寄存器的值，供中断程序用
//*----------------------------------------------------------------------------
unsigned int AT91F_USART_GetStatus_zzf(AT91PS_USART pUSART )
{
	return(pUSART->US_CSR);
}

//*----------------------------------------------------------------------------
//* 函数名： AT91F_DBGU_GetInterruptMaskStatus_zzf
//* 功能：中断屏蔽寄存器的值，供中断程序使用
//*----------------------------------------------------------------------------
unsigned int AT91F_USRT_GetInterruptMaskStatus_zzf(AT91PS_USART pUSART)
{
	return(pUSART->US_IMR);
}


void US0_irq_handler(void)
{
	unsigned int  status; //变量定义



	//禁止系统中断（DBGU属于系统中断）
	AT91F_AIC_DisableIt(AT91C_BASE_AIC, AT91C_ID_US0);    
	//查看是那类中断，读取状态积存器/中断屏蔽积存器，以清除中断标志，		
	status=(AT91F_USART_GetStatus_zzf((AT91PS_USART)AT91C_BASE_US0)&AT91F_USRT_GetInterruptMaskStatus_zzf((AT91PS_USART)AT91C_BASE_US0));
	 
	if ( status & AT91C_US_RXRDY)
	{
		 while (!AT91F_US_TxReady((AT91PS_USART)AT91C_BASE_US0));
		 AT91F_US_PutChar (AT91C_BASE_US0, AT91F_US_GetChar(AT91C_BASE_US0));
	}

	//* Clear the interrupt.    
	AT91F_AIC_ClearIt(AT91C_BASE_AIC, AT91C_ID_US0);      
	//* End of interrupt 	
	AT91C_BASE_AIC->AIC_EOICR = 0;
	AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_US0);   
   
}

void prvSetupUARTInterrupt()
{
	
	//* 允许接受缓冲区满中断
	AT91F_US_EnableIt((AT91PS_USART)AT91C_BASE_US0,AT91C_US_RXRDY);
	//* 允许接受缓冲区满中断
	AT91F_AIC_ConfigureIt ( AT91C_BASE_AIC,
							AT91C_ID_US0,
							US0_INT_LEVEL,
							AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL,
							( void (*)( void ) ) US0_irq_handler );
	//* 允许中断
	AT91F_AIC_EnableIt (AT91C_BASE_AIC, AT91C_ID_US0);		
}

void US0_init()
{ 	
	//* 配置I/O
	AT91F_US0_CfgPIO ();  //调用库函数
	//开US0时钟
	AT91F_US0_CfgPMC();       
	//* 配置 US0
	AT91F_US_Configure (                         			// 调用库函数
						(AT91PS_USART) AT91C_BASE_US0,    	// US0 基地址
						AT91B_MCK,
						AT91C_US_ASYNC_MODE ,              	// 模式积存器
						AT91C_US0_BAUD ,                  	// 波特率
						0);                               	// 触发时间
	//*允许串口接受发送
	AT91F_US_EnableTxRx((AT91PS_USART)AT91C_BASE_US0);
    //*中断设置
	prvSetupUARTInterrupt();	
}