lib_at91rm9200.c

该源码是AT91RM9200处理器的loader文件

        return pRtc->RTC_IMR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_RTC_IsInterruptMasked
//* \brief Test if RTC Interrupt is Masked 
//*----------------------------------------------------------------------------
 int AT91F_RTC_IsInterruptMasked(
        AT91PS_RTC pRtc,   // \arg  pointer to a RTC controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_RTC_GetInterruptMaskStatus(pRtc) & flag);
}

/* *****************************************************************************
                SOFTWARE API FOR SSC
   ***************************************************************************** */
//* Define the standard I2S mode configuration

//* Configuration to set in the SSC Transmit Clock Mode Register
//* Parameters :  nb_bit_by_slot : 8, 16 or 32 bits
//* 			  nb_slot_by_frame : number of channels
#define AT91C_I2S_ASY_MASTER_TX_SETTING(nb_bit_by_slot, nb_slot_by_frame)( +\
									   AT91C_SSC_CKS_DIV   +\
                            		   AT91C_SSC_CKO_CONTINOUS      +\
                            		   AT91C_SSC_CKG_NONE    +\
                                       AT91C_SSC_START_FALL_RF +\
                           			   AT91C_SSC_STTOUT  +\
                            		   ((1<<16) & AT91C_SSC_STTDLY) +\
                            		   ((((nb_bit_by_slot*nb_slot_by_frame)/2)-1) <<24))


//* Configuration to set in the SSC Transmit Frame Mode Register
//* Parameters : nb_bit_by_slot : 8, 16 or 32 bits
//* 			 nb_slot_by_frame : number of channels
#define AT91C_I2S_ASY_TX_FRAME_SETTING(nb_bit_by_slot, nb_slot_by_frame)( +\
									(nb_bit_by_slot-1)  +\
                            		AT91C_SSC_MSBF   +\
                            		(((nb_slot_by_frame-1)<<8) & AT91C_SSC_DATNB)  +\
                            		(((nb_bit_by_slot-1)<<16) & AT91C_SSC_FSLEN) +\
                            		AT91C_SSC_FSOS_NEGATIVE)


//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_SetBaudrate
//* \brief Set the baudrate according to the CPU clock
//*----------------------------------------------------------------------------
 void AT91F_SSC_SetBaudrate (
        AT91PS_SSC pSSC,        // \arg pointer to a SSC controller
        unsigned int mainClock, // \arg peripheral clock
        unsigned int speed)     // \arg SSC baudrate
{
        unsigned int baud_value;
        //* Define the baud rate divisor register
        if (speed == 0)
           baud_value = 0;
        else
        {
           baud_value = (unsigned int) (mainClock * 10)/(2*speed);
           if ((baud_value % 10) >= 5)
                  baud_value = (baud_value / 10) + 1;
           else
                  baud_value /= 10;
        }

        pSSC->SSC_CMR = baud_value;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_Configure
//* \brief Configure SSC
//*----------------------------------------------------------------------------
 void AT91F_SSC_Configure (
             AT91PS_SSC pSSC,          // \arg pointer to a SSC controller
             unsigned int syst_clock,  // \arg System Clock Frequency
             unsigned int baud_rate,   // \arg Expected Baud Rate Frequency
             unsigned int clock_rx,    // \arg Receiver Clock Parameters
             unsigned int mode_rx,     // \arg mode Register to be programmed
             unsigned int clock_tx,    // \arg Transmitter Clock Parameters
             unsigned int mode_tx)     // \arg mode Register to be programmed
{
    //* Disable interrupts
	pSSC->SSC_IDR = (unsigned int) -1;

    //* Reset receiver and transmitter
	pSSC->SSC_CR = AT91C_SSC_SWRST | AT91C_SSC_RXDIS | AT91C_SSC_TXDIS ;

    //* Define the Clock Mode Register
	AT91F_SSC_SetBaudrate(pSSC, syst_clock, baud_rate);

     //* Write the Receive Clock Mode Register
	pSSC->SSC_RCMR =  clock_rx;

     //* Write the Transmit Clock Mode Register
	pSSC->SSC_TCMR =  clock_tx;

     //* Write the Receive Frame Mode Register
	pSSC->SSC_RFMR =  mode_rx;

     //* Write the Transmit Frame Mode Register
	pSSC->SSC_TFMR =  mode_tx;

    //* Clear Transmit and Receive Counters
	AT91F_PDC_Open((AT91PS_PDC) &(pSSC->SSC_RPR));


}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_EnableRx
//* \brief Enable receiving datas
//*----------------------------------------------------------------------------
 void AT91F_SSC_EnableRx (
	AT91PS_SSC pSSC)     // \arg pointer to a SSC controller
{
    //* Enable receiver
    pSSC->SSC_CR = AT91C_SSC_RXEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_DisableRx
//* \brief Disable receiving datas
//*----------------------------------------------------------------------------
 void AT91F_SSC_DisableRx (
	AT91PS_SSC pSSC)     // \arg pointer to a SSC controller
{
    //* Disable receiver
    pSSC->SSC_CR = AT91C_SSC_RXDIS;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_EnableTx
//* \brief Enable sending datas
//*----------------------------------------------------------------------------
 void AT91F_SSC_EnableTx (
	AT91PS_SSC pSSC)     // \arg pointer to a SSC controller
{
    //* Enable  transmitter
    pSSC->SSC_CR = AT91C_SSC_TXEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_DisableTx
//* \brief Disable sending datas
//*----------------------------------------------------------------------------
 void AT91F_SSC_DisableTx (
	AT91PS_SSC pSSC)     // \arg pointer to a SSC controller
{
    //* Disable  transmitter
    pSSC->SSC_CR = AT91C_SSC_TXDIS;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_EnableIt
//* \brief Enable SSC IT
//*----------------------------------------------------------------------------
 void AT91F_SSC_EnableIt (
	AT91PS_SSC pSSC, // \arg pointer to a SSC controller
	unsigned int flag)   // \arg IT to be enabled
{
	//* Write to the IER register
	pSSC->SSC_IER = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_DisableIt
//* \brief Disable SSC IT
//*----------------------------------------------------------------------------
 void AT91F_SSC_DisableIt (
	AT91PS_SSC pSSC, // \arg pointer to a SSC controller
	unsigned int flag)   // \arg IT to be disabled
{
	//* Write to the IDR register
	pSSC->SSC_IDR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_ReceiveFrame
//* \brief Return 2 if PDC has been initialized with Buffer and Next Buffer, 1 if PDC has been initialized with Next Buffer, 0 if PDC is busy
//*----------------------------------------------------------------------------
 unsigned int AT91F_SSC_ReceiveFrame (
	AT91PS_SSC pSSC,
	char *pBuffer,
	unsigned int szBuffer,
	char *pNextBuffer,
	unsigned int szNextBuffer )
{
	return AT91F_PDC_ReceiveFrame(
		(AT91PS_PDC) &(pSSC->SSC_RPR),
		pBuffer,
		szBuffer,
		pNextBuffer,
		szNextBuffer);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_SendFrame
//* \brief Return 2 if PDC has been initialized with Buffer and Next Buffer, 1 if PDC has been initialized with Next Buffer, 0 if PDC is busy
//*----------------------------------------------------------------------------
 unsigned int AT91F_SSC_SendFrame(
	AT91PS_SSC pSSC,
	char *pBuffer,
	unsigned int szBuffer,
	char *pNextBuffer,
	unsigned int szNextBuffer )
{
	return AT91F_PDC_SendFrame(
		(AT91PS_PDC) &(pSSC->SSC_RPR),
		pBuffer,
		szBuffer,
		pNextBuffer,
		szNextBuffer);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_GetInterruptMaskStatus
//* \brief Return SSC Interrupt Mask Status
//*----------------------------------------------------------------------------
 unsigned int AT91F_SSC_GetInterruptMaskStatus( // \return SSC Interrupt Mask Status
        AT91PS_SSC pSsc) // \arg  pointer to a SSC controller
{
        return pSsc->SSC_IMR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SSC_IsInterruptMasked
//* \brief Test if SSC Interrupt is Masked 
//*----------------------------------------------------------------------------
 int AT91F_SSC_IsInterruptMasked(
        AT91PS_SSC pSsc,   // \arg  pointer to a SSC controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_SSC_GetInterruptMaskStatus(pSsc) & flag);
}

/* *****************************************************************************
                SOFTWARE API FOR SPI
   ***************************************************************************** */
//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_Open
//* \brief Open a SPI Port
//*----------------------------------------------------------------------------
 unsigned int AT91F_SPI_Open (
        const unsigned int null)  // \arg
{
        /* NOT DEFINED AT THIS MOMENT */
        return ( 0 );
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_CfgCs
//* \brief Configure SPI chip select register
//*----------------------------------------------------------------------------
 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
//*----------------------------------------------------------------------------
 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
//*----------------------------------------------------------------------------
 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
//*----------------------------------------------------------------------------
 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
//*----------------------------------------------------------------------------
 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
//*----------------------------------------------------------------------------
 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
//* \brief Enable the SPI controller
//*----------------------------------------------------------------------------
 void AT91F_SPI_CfgMode (
	AT91PS_SPI pSPI, // pointer to a SPI controller
	int mode)        // mode register 
{
	//* Write to the MR register
	pSPI->SPI_MR = mode;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_CfgPCS
//* \brief Switch to the correct PCS of SPI Mode Register : Fixed Peripheral Selected
//*----------------------------------------------------------------------------
 void AT91F_SPI_CfgPCS (
	AT91PS_SPI pSPI, // pointer to a SPI controller