lib_at91rm9200.h

AT91SAM9261的USB设备驱动程序

	AT91F_PDC_SetTx(pPDC, (char *) 0, 0);
	AT91F_PDC_SetRx(pPDC, (char *) 0, 0);

    //* Enable the RX and TX PDC transfer requests
	AT91F_PDC_EnableRx(pPDC);
	AT91F_PDC_EnableTx(pPDC);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PDC_Close
//* \brief Close PDC: disable TX and RX reset transfer descriptors
//*----------------------------------------------------------------------------
__inline void AT91F_PDC_Close (
	AT91PS_PDC pPDC)       // \arg pointer to a PDC controller
{
    //* Disable the RX and TX PDC transfer requests
	AT91F_PDC_DisableRx(pPDC);
	AT91F_PDC_DisableTx(pPDC);

	//* Reset all Counter register Next buffer first
	AT91F_PDC_SetNextTx(pPDC, (char *) 0, 0);
	AT91F_PDC_SetNextRx(pPDC, (char *) 0, 0);
	AT91F_PDC_SetTx(pPDC, (char *) 0, 0);
	AT91F_PDC_SetRx(pPDC, (char *) 0, 0);

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PDC_SendFrame
//* \brief Close PDC: disable TX and RX reset transfer descriptors
//*----------------------------------------------------------------------------
__inline unsigned int AT91F_PDC_SendFrame(
	AT91PS_PDC pPDC,
	char *pBuffer,
	unsigned int szBuffer,
	char *pNextBuffer,
	unsigned int szNextBuffer )
{
	if (AT91F_PDC_IsTxEmpty(pPDC)) {
		//* Buffer and next buffer can be initialized
		AT91F_PDC_SetTx(pPDC, pBuffer, szBuffer);
		AT91F_PDC_SetNextTx(pPDC, pNextBuffer, szNextBuffer);
		return 2;
	}
	else if (AT91F_PDC_IsNextTxEmpty(pPDC)) {
		//* Only one buffer can be initialized
		AT91F_PDC_SetNextTx(pPDC, pBuffer, szBuffer);
		return 1;
	}
	else {
		//* All buffer are in use...
		return 0;
	}
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PDC_ReceiveFrame
//* \brief Close PDC: disable TX and RX reset transfer descriptors
//*----------------------------------------------------------------------------
__inline unsigned int AT91F_PDC_ReceiveFrame (
	AT91PS_PDC pPDC,
	char *pBuffer,
	unsigned int szBuffer,
	char *pNextBuffer,
	unsigned int szNextBuffer )
{
	if (AT91F_PDC_IsRxEmpty(pPDC)) {
		//* Buffer and next buffer can be initialized
		AT91F_PDC_SetRx(pPDC, pBuffer, szBuffer);
		AT91F_PDC_SetNextRx(pPDC, pNextBuffer, szNextBuffer);
		return 2;
	}
	else if (AT91F_PDC_IsNextRxEmpty(pPDC)) {
		//* Only one buffer can be initialized
		AT91F_PDC_SetNextRx(pPDC, pBuffer, szBuffer);
		return 1;
	}
	else {
		//* All buffer are in use...
		return 0;
	}
}
/* *****************************************************************************
                SOFTWARE API FOR AIC
   ***************************************************************************** */
#define AT91C_AIC_BRANCH_OPCODE ((void (*) ()) 0xE51FFF20) // ldr, pc, [pc, #-&F20]

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_ConfigureIt
//* \brief Interrupt Handler Initialization
//*----------------------------------------------------------------------------
__inline unsigned int AT91F_AIC_ConfigureIt (
	AT91PS_AIC pAic,  // \arg pointer to the AIC registers
	unsigned int irq_id,     // \arg interrupt number to initialize
	unsigned int priority,   // \arg priority to give to the interrupt
	unsigned int src_type,   // \arg activation and sense of activation
	void (*newHandler) (void) ) // \arg address of the interrupt handler
{
	unsigned int oldHandler;
    unsigned int mask ;

    oldHandler = pAic->AIC_SVR[irq_id];

    mask = 0x1 << irq_id ;
    //* Disable the interrupt on the interrupt controller
    pAic->AIC_IDCR = mask ;
    //* Save the interrupt handler routine pointer and the interrupt priority
    pAic->AIC_SVR[irq_id] = (unsigned int) newHandler ;
    //* Store the Source Mode Register
    pAic->AIC_SMR[irq_id] = src_type | priority  ;
    //* Clear the interrupt on the interrupt controller
    pAic->AIC_ICCR = mask ;

	return oldHandler;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_EnableIt
//* \brief Enable corresponding IT number
//*----------------------------------------------------------------------------
__inline void AT91F_AIC_EnableIt (
	AT91PS_AIC pAic,      // \arg pointer to the AIC registers
	unsigned int irq_id ) // \arg interrupt number to initialize
{
    //* Enable the interrupt on the interrupt controller
    pAic->AIC_IECR = 0x1 << irq_id ;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_DisableIt
//* \brief Disable corresponding IT number
//*----------------------------------------------------------------------------
__inline void AT91F_AIC_DisableIt (
	AT91PS_AIC pAic,      // \arg pointer to the AIC registers
	unsigned int irq_id ) // \arg interrupt number to initialize
{
    unsigned int mask = 0x1 << irq_id;
    //* Disable the interrupt on the interrupt controller
    pAic->AIC_IDCR = mask ;
    //* Clear the interrupt on the Interrupt Controller ( if one is pending )
    pAic->AIC_ICCR = mask ;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_ClearIt
//* \brief Clear corresponding IT number
//*----------------------------------------------------------------------------
__inline void AT91F_AIC_ClearIt (
	AT91PS_AIC pAic,     // \arg pointer to the AIC registers
	unsigned int irq_id) // \arg interrupt number to initialize
{
    //* Clear the interrupt on the Interrupt Controller ( if one is pending )
    pAic->AIC_ICCR = (0x1 << irq_id);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_AcknowledgeIt
//* \brief Acknowledge corresponding IT number
//*----------------------------------------------------------------------------
__inline void AT91F_AIC_AcknowledgeIt (
	AT91PS_AIC pAic)     // \arg pointer to the AIC registers
{
    pAic->AIC_EOICR = pAic->AIC_EOICR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_SetExceptionVector
//* \brief Configure vector handler
//*----------------------------------------------------------------------------
__inline unsigned int  AT91F_AIC_SetExceptionVector (
	unsigned int *pVector, // \arg pointer to the AIC registers
	void (*Handler) () )   // \arg Interrupt Handler
{
	unsigned int oldVector = *pVector;

	if ((unsigned int) Handler == (unsigned int) AT91C_AIC_BRANCH_OPCODE)
		*pVector = (unsigned int) AT91C_AIC_BRANCH_OPCODE;
	else
		*pVector = (((((unsigned int) Handler) - ((unsigned int) pVector) - 0x8) >> 2) & 0x00FFFFFF) | 0xEA000000;

	return oldVector;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_Trig
//* \brief Trig an IT
//*----------------------------------------------------------------------------
__inline void  AT91F_AIC_Trig (
	AT91PS_AIC pAic,     // \arg pointer to the AIC registers
	unsigned int irq_id) // \arg interrupt number
{
	pAic->AIC_ISCR = (0x1 << irq_id) ;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_IsActive
//* \brief Test if an IT is active
//*----------------------------------------------------------------------------
__inline unsigned int  AT91F_AIC_IsActive (
	AT91PS_AIC pAic,     // \arg pointer to the AIC registers
	unsigned int irq_id) // \arg Interrupt Number
{
	return (pAic->AIC_ISR & (0x1 << irq_id));
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_IsPending
//* \brief Test if an IT is pending
//*----------------------------------------------------------------------------
__inline unsigned int  AT91F_AIC_IsPending (
	AT91PS_AIC pAic,     // \arg pointer to the AIC registers
	unsigned int irq_id) // \arg Interrupt Number
{
	return (pAic->AIC_IPR & (0x1 << irq_id));
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_AIC_Open
//* \brief Set exception vectors and AIC registers to default values
//*----------------------------------------------------------------------------
__inline void AT91F_AIC_Open(
	AT91PS_AIC pAic,        // \arg pointer to the AIC registers
	void (*IrqHandler) (),  // \arg Default IRQ vector exception
	void (*FiqHandler) (),  // \arg Default FIQ vector exception
	void (*DefaultHandler)  (), // \arg Default Handler set in ISR
	void (*SpuriousHandler) (), // \arg Default Spurious Handler
	unsigned int protectMode)   // \arg Debug Control Register
{
	int i;

	// Disable all interrupts and set IVR to the default handler
	for (i = 0; i < 32; ++i) {
		AT91F_AIC_DisableIt(pAic, i);
		AT91F_AIC_ConfigureIt(pAic, i, AT91C_AIC_PRIOR_LOWEST, AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE, DefaultHandler);
	}

	// Set the IRQ exception vector
	AT91F_AIC_SetExceptionVector((unsigned int *) 0x18, IrqHandler);
	// Set the Fast Interrupt exception vector
	AT91F_AIC_SetExceptionVector((unsigned int *) 0x1C, FiqHandler);

	pAic->AIC_SPU = (unsigned int) SpuriousHandler;
	pAic->AIC_DCR = protectMode;
}
/* *****************************************************************************
                SOFTWARE API FOR SPI
   ***************************************************************************** */
//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_CfgCs
//* \brief Configure SPI chip select register
//*----------------------------------------------------------------------------
__inline void AT91F_SPI_CfgCs (
	int cs,     // SPI cs number (0 to 3)
 	int val)   //  chip select register
{
	//* Write to the CSR register
	*(AT91C_SPI_CSR + cs) = val;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_EnableIt
//* \brief Enable SPI interrupt
//*----------------------------------------------------------------------------
__inline void AT91F_SPI_EnableIt (
	AT91PS_SPI pSPI,     // pointer to a SPI controller
	unsigned int flag)   // IT to be enabled
{
	//* Write to the IER register
	pSPI->SPI_IER = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_DisableIt
//* \brief Disable SPI interrupt
//*----------------------------------------------------------------------------
__inline void AT91F_SPI_DisableIt (
	AT91PS_SPI pSPI, // pointer to a SPI controller
	unsigned int flag) // IT to be disabled
{
	//* Write to the IDR register
	pSPI->SPI_IDR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_Reset
//* \brief Reset the SPI controller
//*----------------------------------------------------------------------------
__inline void AT91F_SPI_Reset (
	AT91PS_SPI pSPI // pointer to a SPI controller
	)
{
	//* Write to the CR register
	pSPI->SPI_CR = AT91C_SPI_SWRST;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_Enable
//* \brief Enable the SPI controller
//*----------------------------------------------------------------------------
__inline void AT91F_SPI_Enable (
	AT91PS_SPI pSPI // pointer to a SPI controller
	)
{
	//* Write to the CR register
	pSPI->SPI_CR = AT91C_SPI_SPIEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_Disable
//* \brief Disable the SPI controller
//*----------------------------------------------------------------------------
__inline void AT91F_SPI_Disable (
	AT91PS_SPI pSPI // pointer to a SPI controller
	)
{
	//* Write to the CR register
	pSPI->SPI_CR = AT91C_SPI_SPIDIS;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_CfgMode