lib_at91rm9200.c

基于K9 AT91RM9200 学习板的loader源码

	char PCS_Device) // PCS of the Device
{	
 	//* Write to the MR register
	pSPI->SPI_MR &= 0xFFF0FFFF;
	pSPI->SPI_MR |= ( (PCS_Device<<16) & AT91C_SPI_PCS );
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_ReceiveFrame
//* \brief Return 2 if PDC has been initialized with Buffer and Next Buffer, 1 if PDC has been initializaed with Next Buffer, 0 if PDC is busy
//*----------------------------------------------------------------------------
 unsigned int AT91F_SPI_ReceiveFrame (
	AT91PS_SPI pSPI,
	char *pBuffer,
	unsigned int szBuffer,
	char *pNextBuffer,
	unsigned int szNextBuffer )
{
	return AT91F_PDC_ReceiveFrame(
		(AT91PS_PDC) &(pSPI->SPI_RPR),
		pBuffer,
		szBuffer,
		pNextBuffer,
		szNextBuffer);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_SendFrame
//* \brief Return 2 if PDC has been initialized with Buffer and Next Buffer, 1 if PDC has been initializaed with Next Buffer, 0 if PDC is bSPIy
//*----------------------------------------------------------------------------
 unsigned int AT91F_SPI_SendFrame(
	AT91PS_SPI pSPI,
	char *pBuffer,
	unsigned int szBuffer,
	char *pNextBuffer,
	unsigned int szNextBuffer )
{
	return AT91F_PDC_SendFrame(
		(AT91PS_PDC) &(pSPI->SPI_RPR),
		pBuffer,
		szBuffer,
		pNextBuffer,
		szNextBuffer);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_Close
//* \brief Close SPI: disable IT disable transfert, close PDC
//*----------------------------------------------------------------------------
 void AT91F_SPI_Close (
	AT91PS_SPI pSPI)     // \arg pointer to a SPI controller
{
    //* Reset all the Chip Select register
    pSPI->SPI_CSR[0] = 0 ;
    pSPI->SPI_CSR[1] = 0 ;
    pSPI->SPI_CSR[2] = 0 ;
    pSPI->SPI_CSR[3] = 0 ;

    //* Reset the SPI mode
    pSPI->SPI_MR = 0  ;

    //* Disable all interrupts
    pSPI->SPI_IDR = 0xFFFFFFFF ;

    //* Abort the Peripheral Data Transfers
    AT91F_PDC_Close((AT91PS_PDC) &(pSPI->SPI_RPR));

    //* Disable receiver and transmitter and stop any activity immediately
    pSPI->SPI_CR = AT91C_SPI_SPIDIS;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_PutChar
//* \brief Send a character,does not check if ready to send
//*----------------------------------------------------------------------------
 void AT91F_SPI_PutChar (
	AT91PS_SPI pSPI,
	unsigned int character,
             unsigned int cs_number )
{
    unsigned int value_for_cs;
    value_for_cs = (~(1 << cs_number)) & 0xF;  //Place a zero among a 4 ONEs number
    pSPI->SPI_TDR = (character & 0xFFFF) | (value_for_cs << 16);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_GetChar
//* \brief Receive a character,does not check if a character is available
//*----------------------------------------------------------------------------
 int AT91F_SPI_GetChar (
	const AT91PS_SPI pSPI)
{
    return((pSPI->SPI_RDR) & 0xFFFF);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_GetInterruptMaskStatus
//* \brief Return SPI Interrupt Mask Status
//*----------------------------------------------------------------------------
 unsigned int AT91F_SPI_GetInterruptMaskStatus( // \return SPI Interrupt Mask Status
        AT91PS_SPI pSpi) // \arg  pointer to a SPI controller
{
        return pSpi->SPI_IMR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_SPI_IsInterruptMasked
//* \brief Test if SPI Interrupt is Masked 
//*----------------------------------------------------------------------------
 int AT91F_SPI_IsInterruptMasked(
        AT91PS_SPI pSpi,   // \arg  pointer to a SPI controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_SPI_GetInterruptMaskStatus(pSpi) & flag);
}

/* *****************************************************************************
                SOFTWARE API FOR TC
   ***************************************************************************** */
//*----------------------------------------------------------------------------
//* \fn    AT91F_TC_InterruptEnable
//* \brief Enable TC Interrupt
//*----------------------------------------------------------------------------
 void AT91F_TC_InterruptEnable(
        AT91PS_TC pTc,   // \arg  pointer to a TC controller
        unsigned int flag) // \arg  TC interrupt to be enabled
{
        pTc->TC_IER = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TC_InterruptDisable
//* \brief Disable TC Interrupt
//*----------------------------------------------------------------------------
 void AT91F_TC_InterruptDisable(
        AT91PS_TC pTc,   // \arg  pointer to a TC controller
        unsigned int flag) // \arg  TC interrupt to be disabled
{
        pTc->TC_IDR = flag;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TC_GetInterruptMaskStatus
//* \brief Return TC Interrupt Mask Status
//*----------------------------------------------------------------------------
 unsigned int AT91F_TC_GetInterruptMaskStatus( // \return TC Interrupt Mask Status
        AT91PS_TC pTc) // \arg  pointer to a TC controller
{
        return pTc->TC_IMR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_TC_IsInterruptMasked
//* \brief Test if TC Interrupt is Masked 
//*----------------------------------------------------------------------------
 int AT91F_TC_IsInterruptMasked(
        AT91PS_TC pTc,   // \arg  pointer to a TC controller
        unsigned int flag) // \arg  flag to be tested
{
        return (AT91F_TC_GetInterruptMaskStatus(pTc) & flag);
}

/* *****************************************************************************
                SOFTWARE API FOR PMC
   ***************************************************************************** */
//*----------------------------------------------------------------------------
//* \fn    AT91F_CKGR_GetMainClock
//* \brief Return Main clock in Hz
//*----------------------------------------------------------------------------
 unsigned int AT91F_CKGR_GetMainClock (
	AT91PS_CKGR pCKGR, // \arg pointer to CKGR controller
	unsigned int slowClock)  // \arg slowClock in Hz
{
	return ((pCKGR->CKGR_MCFR  & AT91C_CKGR_MAINF) * slowClock) >> 4;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PMC_GetProcessorClock
//* \brief Return processor clock in Hz (for AT91RM3400 and AT91RM9200)
//*----------------------------------------------------------------------------
 unsigned int AT91F_PMC_GetProcessorClock (
	AT91PS_PMC pPMC, // \arg pointer to PMC controller
	AT91PS_CKGR pCKGR, // \arg pointer to CKGR controller
	unsigned int slowClock)  // \arg slowClock in Hz
{
	unsigned int reg = pPMC->PMC_MCKR;
	unsigned int prescaler = (1 << ((reg & AT91C_PMC_PRES) >> 2));
	unsigned int pllDivider, pllMultiplier;

	switch (reg & AT91C_PMC_CSS) {
		case AT91C_PMC_CSS_SLOW_CLK: // Slow clock selected
			return slowClock / prescaler;
		case AT91C_PMC_CSS_MAIN_CLK: // Main clock is selected
			return AT91F_CKGR_GetMainClock(pCKGR, slowClock) / prescaler;
		case AT91C_PMC_CSS_PLLA_CLK: // PLLA clock is selected
			reg = pCKGR->CKGR_PLLAR;
			pllDivider    = (reg  & AT91C_CKGR_DIVA);
			pllMultiplier = ((reg  & AT91C_CKGR_MULA) >> 16) + 1;
			if (reg & AT91C_CKGR_SRCA) // Source is Main clock
				return AT91F_CKGR_GetMainClock(pCKGR, slowClock) / pllDivider * pllMultiplier / prescaler;
			else                       // Source is Slow clock
				return slowClock / pllDivider * pllMultiplier / prescaler;
		case AT91C_PMC_CSS_PLLB_CLK: // PLLB clock is selected
			reg = pCKGR->CKGR_PLLBR;
			pllDivider    = (reg  & AT91C_CKGR_DIVB);
			pllMultiplier = ((reg  & AT91C_CKGR_MULB) >> 16) + 1;
			return AT91F_CKGR_GetMainClock(pCKGR, slowClock) / pllDivider * pllMultiplier / prescaler;
	}
	return 0;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PMC_GetMasterClock
//* \brief Return master clock in Hz (just for AT91RM9200)
//*----------------------------------------------------------------------------
 unsigned int AT91F_PMC_GetMasterClock (
	AT91PS_PMC pPMC, // \arg pointer to PMC controller
	AT91PS_CKGR pCKGR, // \arg pointer to CKGR controller
	unsigned int slowClock)  // \arg slowClock in Hz
{
	return AT91F_PMC_GetProcessorClock(pPMC, pCKGR, slowClock) /
		(((pPMC->PMC_MCKR & AT91C_PMC_MDIV) >> 8)+1);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PMC_EnablePeriphClock
//* \brief Enable peripheral clock
//*----------------------------------------------------------------------------
 void AT91F_PMC_EnablePeriphClock (
	AT91PS_PMC pPMC, // \arg pointer to PMC controller
	unsigned int periphIds)  // \arg IDs of peripherals to enable
{
	pPMC->PMC_PCER = periphIds;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PMC_DisablePeriphClock
//* \brief Enable peripheral clock
//*----------------------------------------------------------------------------
 void AT91F_PMC_DisablePeriphClock (
	AT91PS_PMC pPMC, // \arg pointer to PMC controller
	unsigned int periphIds)  // \arg IDs of peripherals to enable
{
	pPMC->PMC_PCDR = periphIds;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PMC_EnablePCK
//* \brief Enable peripheral clock
//*----------------------------------------------------------------------------
 void AT91F_PMC_EnablePCK (
	AT91PS_PMC pPMC, // \arg pointer to PMC controller
	unsigned int pck,  // \arg Peripheral clock identifier 0 .. 7
	unsigned int ccs,  // \arg clock selection: AT91C_PMC_CSS_SLOW_CLK, AT91C_PMC_CSS_MAIN_CLK, AT91C_PMC_CSS_PLLA_CLK, AT91C_PMC_CSS_PLLB_CLK
	unsigned int pres) // \arg Programmable clock prescalar AT91C_PMC_PRES_CLK, AT91C_PMC_PRES_CLK_2, ..., AT91C_PMC_PRES_CLK_64
{
	pPMC->PMC_PCKR[pck] = ccs | pres;
	pPMC->PMC_SCER = (1 << pck) << 8;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PMC_DisablePCK
//* \brief Enable peripheral clock
//*----------------------------------------------------------------------------
 void AT91F_PMC_DisablePCK (
	AT91PS_PMC pPMC, // \arg pointer to PMC controller
	unsigned int pck)  // \arg Peripheral clock identifier 0 .. 7
{
	pPMC->PMC_SCDR = (1 << pck) << 8;
}

/* *****************************************************************************
                SOFTWARE API FOR PIO
   ***************************************************************************** */
//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_CfgPeriph
//* \brief Enable pins to be drived by peripheral
//*----------------------------------------------------------------------------
 void AT91F_PIO_CfgPeriph(
	AT91PS_PIO pPio,             // \arg pointer to a PIO controller
	unsigned int periphAEnable,  // \arg PERIPH A to enable
	unsigned int periphBEnable)  // \arg PERIPH B to enable

{
	pPio->PIO_ASR = periphAEnable;
	pPio->PIO_BSR = periphBEnable;
	pPio->PIO_PDR = (periphAEnable | periphBEnable); // Set in Periph mode
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_CfgOutput
//* \brief Enable PIO in output mode
//*----------------------------------------------------------------------------
 void AT91F_PIO_CfgOutput(
	AT91PS_PIO pPio,             // \arg pointer to a PIO controller
	unsigned int pioEnable)      // \arg PIO to be enabled
{
	pPio->PIO_PER = pioEnable; // Set in PIO mode
	pPio->PIO_OER = pioEnable; // Configure in Output
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_CfgInput
//* \brief Enable PIO in input mode
//*----------------------------------------------------------------------------
 void AT91F_PIO_CfgInput(
	AT91PS_PIO pPio,             // \arg pointer to a PIO controller
	unsigned int inputEnable)      // \arg PIO to be enabled
{
	// Disable output
	pPio->PIO_ODR  = inputEnable;
	pPio->PIO_PER  = inputEnable;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_CfgOpendrain
//* \brief Configure PIO in open drain
//*----------------------------------------------------------------------------
 void AT91F_PIO_CfgOpendrain(
	AT91PS_PIO pPio,             // \arg pointer to a PIO controller
	unsigned int multiDrvEnable) // \arg pio to be configured in open drain
{
	// Configure the multi-drive option
	pPio->PIO_MDDR = ~multiDrvEnable;
	pPio->PIO_MDER = multiDrvEnable;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_PIO_CfgPullup
//* \brief Enable pullup on PIO
//*----------------------------------------------------------------------------
 void AT91F_PIO_CfgPullup(
	AT91PS_PIO pPio,             // \arg pointer to a PIO controller
	unsigned int pullupEnable)   // \arg enable pullup on PIO
{
		// Connect or not Pullup
	pPio->PIO_PPUDR = ~pullupEnable;
	pPio->PIO_PPUER = pullupEnable;
}