lib_at91rm9200.c

基于K9 AT91RM9200 学习板的loader源码

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_B_RegisterSelection
//* \brief PIO B Register Selection 
//*----------------------------------------------------------------------------
 void AT91F_PIO_B_RegisterSelection(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  pio B register selection 
{
        pPio->PIO_BSR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_Get_AB_RegisterStatus
//* \brief Return PIO Interrupt Status
//*----------------------------------------------------------------------------
 unsigned int AT91F_PIO_Get_AB_RegisterStatus( // \return PIO AB Register Status
        AT91PS_PIO pPio) // \arg  pointer to a PIO controller
{
        return pPio->PIO_ABSR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_IsAB_RegisterSet
//* \brief Test if PIO AB Register is Set
//*----------------------------------------------------------------------------
 int AT91F_PIO_IsAB_RegisterSet(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_PIO_Get_AB_RegisterStatus(pPio) & flag);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_OutputWriteEnable
//* \brief Output Write Enable PIO
//*----------------------------------------------------------------------------
 void AT91F_PIO_OutputWriteEnable(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  pio output write to be enabled
{
        pPio->PIO_OWER = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_OutputWriteDisable
//* \brief Output Write Disable PIO
//*----------------------------------------------------------------------------
 void AT91F_PIO_OutputWriteDisable(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  pio output write to be disabled
{
        pPio->PIO_OWDR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_GetOutputWriteStatus
//* \brief Return PIO Output Write Status
//*----------------------------------------------------------------------------
 unsigned int AT91F_PIO_GetOutputWriteStatus( // \return PIO Output Write Status
        AT91PS_PIO pPio) // \arg  pointer to a PIO controller
{
        return pPio->PIO_OWSR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_IsOutputWriteSet
//* \brief Test if PIO OutputWrite is Set
//*----------------------------------------------------------------------------
 int AT91F_PIO_IsOutputWriteSet(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_PIO_GetOutputWriteStatus(pPio) & flag);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_GetCfgPullup
//* \brief Return PIO Configuration Pullup
//*----------------------------------------------------------------------------
 unsigned int AT91F_PIO_GetCfgPullup( // \return PIO Configuration Pullup 
        AT91PS_PIO pPio) // \arg  pointer to a PIO controller
{
        return pPio->PIO_PPUSR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_IsOutputDataStatusSet
//* \brief Test if PIO Output Data Status is Set 
//*----------------------------------------------------------------------------
 int AT91F_PIO_IsOutputDataStatusSet(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_PIO_GetOutputDataStatus(pPio) & flag);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_IsCfgPullupStatusSet
//* \brief Test if PIO Configuration Pullup Status is Set
//*----------------------------------------------------------------------------
 int AT91F_PIO_IsCfgPullupStatusSet(
        AT91PS_PIO pPio,   // \arg  pointer to a PIO controller
        unsigned int flag) // \arg  flag to be tested
{
        return (~AT91F_PIO_GetCfgPullup(pPio) & flag);
}

/* *****************************************************************************
                SOFTWARE API FOR TWI
   ***************************************************************************** */
//*----------------------------------------------------------------------------
//* \fn    AT91F_TWI_EnableIt
//* \brief Enable TWI IT
//*----------------------------------------------------------------------------
 void AT91F_TWI_EnableIt (
	AT91PS_TWI pTWI, // \arg pointer to a TWI controller
	unsigned int flag)   // \arg IT to be enabled
{
	//* Write to the IER register
	pTWI->TWI_IER = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TWI_DisableIt
//* \brief Disable TWI IT
//*----------------------------------------------------------------------------
 void AT91F_TWI_DisableIt (
	AT91PS_TWI pTWI, // \arg pointer to a TWI controller
	unsigned int flag)   // \arg IT to be disabled
{
	//* Write to the IDR register
	pTWI->TWI_IDR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TWI_Configure
//* \brief Configure TWI in master mode
//*----------------------------------------------------------------------------
 void AT91F_TWI_Configure ( AT91PS_TWI pTWI )          // \arg pointer to a TWI controller
{
    //* Disable interrupts
	pTWI->TWI_IDR = (unsigned int) -1;

    //* Reset peripheral
	pTWI->TWI_CR = AT91C_TWI_SWRST;

	//* Set Master mode
	pTWI->TWI_CR = AT91C_TWI_MSEN | AT91C_TWI_SVDIS;

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TWI_GetInterruptMaskStatus
//* \brief Return TWI Interrupt Mask Status
//*----------------------------------------------------------------------------
 unsigned int AT91F_TWI_GetInterruptMaskStatus( // \return TWI Interrupt Mask Status
        AT91PS_TWI pTwi) // \arg  pointer to a TWI controller
{
        return pTwi->TWI_IMR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TWI_IsInterruptMasked
//* \brief Test if TWI Interrupt is Masked 
//*----------------------------------------------------------------------------
 int AT91F_TWI_IsInterruptMasked(
        AT91PS_TWI pTwi,   // \arg  pointer to a TWI controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_TWI_GetInterruptMaskStatus(pTwi) & flag);
}

/* *****************************************************************************
                SOFTWARE API FOR USART
   ***************************************************************************** */

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_Baudrate
//* \brief Caluculate baud_value according to the main clock and the baud rate
//*----------------------------------------------------------------------------
 unsigned int AT91F_US_Baudrate (
	const unsigned int main_clock, // \arg peripheral clock
	const unsigned int baud_rate)  // \arg UART baudrate
{
	unsigned int baud_value = ((main_clock*10)/(baud_rate * 16));
	if ((baud_value % 10) >= 5)
		baud_value = (baud_value / 10) + 1;
	else
		baud_value /= 10;
	return baud_value;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_SetBaudrate
//* \brief Set the baudrate according to the CPU clock
//*----------------------------------------------------------------------------
 void AT91F_US_SetBaudrate (
	AT91PS_USART pUSART,    // \arg pointer to a USART controller
	unsigned int mainClock, // \arg peripheral clock
	unsigned int speed)     // \arg UART baudrate
{
	//* Define the baud rate divisor register
	pUSART->US_BRGR = AT91F_US_Baudrate(mainClock, speed);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_SetTimeguard
//* \brief Set USART timeguard
//*----------------------------------------------------------------------------
 void AT91F_US_SetTimeguard (
	AT91PS_USART pUSART,    // \arg pointer to a USART controller
	unsigned int timeguard) // \arg timeguard value
{
	//* Write the Timeguard Register
	pUSART->US_TTGR = timeguard ;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_EnableIt
//* \brief Enable USART IT
//*----------------------------------------------------------------------------
 void AT91F_US_EnableIt (
	AT91PS_USART pUSART, // \arg pointer to a USART controller
	unsigned int flag)   // \arg IT to be enabled
{
	//* Write to the IER register
	pUSART->US_IER = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_DisableIt
//* \brief Disable USART IT
//*----------------------------------------------------------------------------
 void AT91F_US_DisableIt (
	AT91PS_USART pUSART, // \arg pointer to a USART controller
	unsigned int flag)   // \arg IT to be disabled
{
	//* Write to the IER register
	pUSART->US_IDR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_Configure
//* \brief Configure USART
//*----------------------------------------------------------------------------
 void AT91F_US_Configure (
	AT91PS_USART pUSART,     // \arg pointer to a USART controller
	unsigned int mainClock,  // \arg peripheral clock
	unsigned int mode ,      // \arg mode Register to be programmed
	unsigned int baudRate ,  // \arg baudrate to be programmed
	unsigned int timeguard ) // \arg timeguard to be programmed
{
    //* Disable interrupts
    pUSART->US_IDR = (unsigned int) -1;

    //* Reset receiver and transmitter
    pUSART->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX | AT91C_US_RXDIS | AT91C_US_TXDIS ;

	//* Define the baud rate divisor register
	AT91F_US_SetBaudrate(pUSART, mainClock, baudRate);

	//* Write the Timeguard Register
	AT91F_US_SetTimeguard(pUSART, timeguard);

    //* Clear Transmit and Receive Counters
    AT91F_PDC_Open((AT91PS_PDC) &(pUSART->US_RPR));

    //* Define the USART mode
    pUSART->US_MR = mode  ;

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_EnableRx
//* \brief Enable receiving characters
//*----------------------------------------------------------------------------
 void AT91F_US_EnableRx (
	AT91PS_USART pUSART)     // \arg pointer to a USART controller
{
    //* Enable receiver
    pUSART->US_CR = AT91C_US_RXEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_EnableTx
//* \brief Enable sending characters
//*----------------------------------------------------------------------------
 void AT91F_US_EnableTx (
	AT91PS_USART pUSART)     // \arg pointer to a USART controller
{
    //* Enable  transmitter
    pUSART->US_CR = AT91C_US_TXEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_ResetRx
//* \brief Reset Receiver and re-enable it
//*----------------------------------------------------------------------------
 void AT91F_US_ResetRx (
	AT91PS_USART pUSART)     // \arg pointer to a USART controller
{
	//* Reset receiver
	pUSART->US_CR = AT91C_US_RSTRX;
    //* Re-Enable receiver
    pUSART->US_CR = AT91C_US_RXEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_ResetTx
//* \brief Reset Transmitter and re-enable it
//*----------------------------------------------------------------------------
 void AT91F_US_ResetTx (
	AT91PS_USART pUSART)     // \arg pointer to a USART controller
{
	//* Reset transmitter
	pUSART->US_CR = AT91C_US_RSTTX;
    //* Enable transmitter
    pUSART->US_CR = AT91C_US_TXEN;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_DisableRx
//* \brief Disable Receiver
//*----------------------------------------------------------------------------
 void AT91F_US_DisableRx (
	AT91PS_USART pUSART)     // \arg pointer to a USART controller
{
    //* Disable receiver
    pUSART->US_CR = AT91C_US_RXDIS;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_US_DisableTx
//* \brief Disable Transmitter
//*----------------------------------------------------------------------------
 void AT91F_US_DisableTx (
	AT91PS_USAR