File content as of revision 0:d920d64db582:

/***********************************************************************//**
 * @file        lpc17xx_clkpwr.c
 * @brief        Contains all functions support for Clock and Power Control
 *                 firmware library on LPC17xx
 * @version        3.0
 * @date        18. June. 2010
 * @author        NXP MCU SW Application Team
 **************************************************************************
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * products. This software is supplied "AS IS" without any warranties.
 * NXP Semiconductors assumes no responsibility or liability for the
 * use of the software, conveys no license or title under any patent,
 * copyright, or mask work right to the product. NXP Semiconductors
 * reserves the right to make changes in the software without
 * notification. NXP Semiconductors also make no representation or
 * warranty that such application will be suitable for the specified
 * use without further testing or modification.
 **********************************************************************/

/* Peripheral group ----------------------------------------------------------- */
/** @addtogroup CLKPWR
 * @{
 */

/* Includes ------------------------------------------------------------------- */
#include "lpc17xx_clkpwr.h"


/* Public Functions ----------------------------------------------------------- */
/** @addtogroup CLKPWR_Public_Functions
 * @{
 */

/*********************************************************************//**
 * @brief         Set value of each Peripheral Clock Selection
 * @param[in]    ClkType    Peripheral Clock Selection of each type,
 *                 should be one of the following:
 *                - CLKPWR_PCLKSEL_WDT           : WDT
                - CLKPWR_PCLKSEL_TIMER0       : Timer 0
                - CLKPWR_PCLKSEL_TIMER1       : Timer 1
                - CLKPWR_PCLKSEL_UART0       : UART 0
                - CLKPWR_PCLKSEL_UART1      : UART 1
                - CLKPWR_PCLKSEL_PWM1       : PWM 1
                - CLKPWR_PCLKSEL_I2C0       : I2C 0
                - CLKPWR_PCLKSEL_SPI           : SPI
                - CLKPWR_PCLKSEL_SSP1       : SSP 1
                - CLKPWR_PCLKSEL_DAC           : DAC
                - CLKPWR_PCLKSEL_ADC           : ADC
                - CLKPWR_PCLKSEL_CAN1          : CAN 1
                - CLKPWR_PCLKSEL_CAN2          : CAN 2
                - CLKPWR_PCLKSEL_ACF           : ACF
                - CLKPWR_PCLKSEL_QEI         : QEI
                - CLKPWR_PCLKSEL_PCB           : PCB
                - CLKPWR_PCLKSEL_I2C1       : I2C 1
                - CLKPWR_PCLKSEL_SSP0       : SSP 0
                - CLKPWR_PCLKSEL_TIMER2       : Timer 2
                - CLKPWR_PCLKSEL_TIMER3       : Timer 3
                - CLKPWR_PCLKSEL_UART2       : UART 2
                - CLKPWR_PCLKSEL_UART3       : UART 3
                - CLKPWR_PCLKSEL_I2C2       : I2C 2
                - CLKPWR_PCLKSEL_I2S           : I2S
                - CLKPWR_PCLKSEL_RIT           : RIT
                - CLKPWR_PCLKSEL_SYSCON       : SYSCON
                - CLKPWR_PCLKSEL_MC         : MC

 * @param[in]    DivVal    Value of divider, should be:
 *                 - CLKPWR_PCLKSEL_CCLK_DIV_4 : PCLK_peripheral = CCLK/4
 *                 - CLKPWR_PCLKSEL_CCLK_DIV_1 : PCLK_peripheral = CCLK/1
 *                - CLKPWR_PCLKSEL_CCLK_DIV_2 : PCLK_peripheral = CCLK/2
 *
 * @return none
 **********************************************************************/
void CLKPWR_SetPCLKDiv (uint32_t ClkType, uint32_t DivVal)
{
    uint32_t bitpos;

    bitpos = (ClkType < 32) ? (ClkType) : (ClkType - 32);

    /* PCLKSEL0 selected */
    if (ClkType < 32)
    {
        /* Clear two bit at bit position */
        LPC_SC->PCLKSEL0 &= (~(CLKPWR_PCLKSEL_BITMASK(bitpos)));

        /* Set two selected bit */
        LPC_SC->PCLKSEL0 |= (CLKPWR_PCLKSEL_SET(bitpos, DivVal));
    }
    /* PCLKSEL1 selected */
    else
    {
        /* Clear two bit at bit position */
        LPC_SC->PCLKSEL1 &= ~(CLKPWR_PCLKSEL_BITMASK(bitpos));

        /* Set two selected bit */
        LPC_SC->PCLKSEL1 |= (CLKPWR_PCLKSEL_SET(bitpos, DivVal));
    }
}


/*********************************************************************//**
 * @brief        Get current value of each Peripheral Clock Selection
 * @param[in]    ClkType    Peripheral Clock Selection of each type,
 *                 should be one of the following:
 *                - CLKPWR_PCLKSEL_WDT           : WDT
                - CLKPWR_PCLKSEL_TIMER0       : Timer 0
                - CLKPWR_PCLKSEL_TIMER1       : Timer 1
                - CLKPWR_PCLKSEL_UART0       : UART 0
                - CLKPWR_PCLKSEL_UART1      : UART 1
                - CLKPWR_PCLKSEL_PWM1       : PWM 1
                - CLKPWR_PCLKSEL_I2C0       : I2C 0
                - CLKPWR_PCLKSEL_SPI           : SPI
                - CLKPWR_PCLKSEL_SSP1       : SSP 1
                - CLKPWR_PCLKSEL_DAC           : DAC
                - CLKPWR_PCLKSEL_ADC           : ADC
                - CLKPWR_PCLKSEL_CAN1          : CAN 1
                - CLKPWR_PCLKSEL_CAN2          : CAN 2
                - CLKPWR_PCLKSEL_ACF           : ACF
                - CLKPWR_PCLKSEL_QEI         : QEI
                - CLKPWR_PCLKSEL_PCB           : PCB
                - CLKPWR_PCLKSEL_I2C1       : I2C 1
                - CLKPWR_PCLKSEL_SSP0       : SSP 0
                - CLKPWR_PCLKSEL_TIMER2       : Timer 2
                - CLKPWR_PCLKSEL_TIMER3       : Timer 3
                - CLKPWR_PCLKSEL_UART2       : UART 2
                - CLKPWR_PCLKSEL_UART3       : UART 3
                - CLKPWR_PCLKSEL_I2C2       : I2C 2
                - CLKPWR_PCLKSEL_I2S           : I2S
                - CLKPWR_PCLKSEL_RIT           : RIT
                - CLKPWR_PCLKSEL_SYSCON       : SYSCON
                - CLKPWR_PCLKSEL_MC         : MC

 * @return        Value of Selected Peripheral Clock Selection
 **********************************************************************/
uint32_t CLKPWR_GetPCLKSEL (uint32_t ClkType)
{
    uint32_t bitpos, retval;

    if (ClkType < 32)
    {
        bitpos = ClkType;
        retval = LPC_SC->PCLKSEL0;
    }
    else
    {
        bitpos = ClkType - 32;
        retval = LPC_SC->PCLKSEL1;
    }

    retval = CLKPWR_PCLKSEL_GET(bitpos, retval);
    return retval;
}



/*********************************************************************//**
 * @brief         Get current value of each Peripheral Clock
 * @param[in]    ClkType    Peripheral Clock Selection of each type,
 *                 should be one of the following:
 *                - CLKPWR_PCLKSEL_WDT           : WDT
                - CLKPWR_PCLKSEL_TIMER0       : Timer 0
                - CLKPWR_PCLKSEL_TIMER1       : Timer 1
                - CLKPWR_PCLKSEL_UART0       : UART 0
                - CLKPWR_PCLKSEL_UART1      : UART 1
                - CLKPWR_PCLKSEL_PWM1       : PWM 1
                - CLKPWR_PCLKSEL_I2C0       : I2C 0
                - CLKPWR_PCLKSEL_SPI           : SPI
                - CLKPWR_PCLKSEL_SSP1       : SSP 1
                - CLKPWR_PCLKSEL_DAC           : DAC
                - CLKPWR_PCLKSEL_ADC           : ADC
                - CLKPWR_PCLKSEL_CAN1          : CAN 1
                - CLKPWR_PCLKSEL_CAN2          : CAN 2
                - CLKPWR_PCLKSEL_ACF           : ACF
                - CLKPWR_PCLKSEL_QEI         : QEI
                - CLKPWR_PCLKSEL_PCB           : PCB
                - CLKPWR_PCLKSEL_I2C1       : I2C 1
                - CLKPWR_PCLKSEL_SSP0       : SSP 0
                - CLKPWR_PCLKSEL_TIMER2       : Timer 2
                - CLKPWR_PCLKSEL_TIMER3       : Timer 3
                - CLKPWR_PCLKSEL_UART2       : UART 2
                - CLKPWR_PCLKSEL_UART3       : UART 3
                - CLKPWR_PCLKSEL_I2C2       : I2C 2
                - CLKPWR_PCLKSEL_I2S           : I2S
                - CLKPWR_PCLKSEL_RIT           : RIT
                - CLKPWR_PCLKSEL_SYSCON       : SYSCON
                - CLKPWR_PCLKSEL_MC         : MC

 * @return        Value of Selected Peripheral Clock
 **********************************************************************/
uint32_t CLKPWR_GetPCLK (uint32_t ClkType)
{
    uint32_t retval, div;

    retval = SystemCoreClock;
    div = CLKPWR_GetPCLKSEL(ClkType);

    switch (div)
    {
    case 0:
        div = 4;
        break;

    case 1:
        div = 1;
        break;

    case 2:
        div = 2;
        break;

    case 3:
        div = 8;
        break;
    }
    retval /= div;

    return retval;
}



/*********************************************************************//**
 * @brief         Configure power supply for each peripheral according to NewState
 * @param[in]    PPType    Type of peripheral used to enable power,
 *                         should be one of the following:
 *                 -  CLKPWR_PCONP_PCTIM0         : Timer 0
                -  CLKPWR_PCONP_PCTIM1         : Timer 1
                -  CLKPWR_PCONP_PCUART0      : UART 0
                -  CLKPWR_PCONP_PCUART1       : UART 1
                -  CLKPWR_PCONP_PCPWM1         : PWM 1
                -  CLKPWR_PCONP_PCI2C0         : I2C 0
                -  CLKPWR_PCONP_PCSPI       : SPI
                -  CLKPWR_PCONP_PCRTC       : RTC
                -  CLKPWR_PCONP_PCSSP1         : SSP 1
                -  CLKPWR_PCONP_PCAD           : ADC
                -  CLKPWR_PCONP_PCAN1       : CAN 1
                -  CLKPWR_PCONP_PCAN2       : CAN 2
                -  CLKPWR_PCONP_PCGPIO         : GPIO
                -  CLKPWR_PCONP_PCRIT         : RIT
                -  CLKPWR_PCONP_PCMC         : MC
                -  CLKPWR_PCONP_PCQEI         : QEI
                -  CLKPWR_PCONP_PCI2C1       : I2C 1
                -  CLKPWR_PCONP_PCSSP0         : SSP 0
                -  CLKPWR_PCONP_PCTIM2         : Timer 2
                -  CLKPWR_PCONP_PCTIM3         : Timer 3
                -  CLKPWR_PCONP_PCUART2      : UART 2
                -  CLKPWR_PCONP_PCUART3       : UART 3
                -  CLKPWR_PCONP_PCI2C2         : I2C 2
                -  CLKPWR_PCONP_PCI2S       : I2S
                -  CLKPWR_PCONP_PCGPDMA       : GPDMA
                -  CLKPWR_PCONP_PCENET         : Ethernet
                -  CLKPWR_PCONP_PCUSB       : USB
 *
 * @param[in]    NewState    New state of Peripheral Power, should be:
 *                 - ENABLE    : Enable power for this peripheral
 *                 - DISABLE    : Disable power for this peripheral
 *
 * @return none
 **********************************************************************/
void CLKPWR_ConfigPPWR (uint32_t PPType, FunctionalState NewState)
{
    if (NewState == ENABLE)
    {
        LPC_SC->PCONP |= PPType & CLKPWR_PCONP_BITMASK;
    }
    else if (NewState == DISABLE)
    {
        LPC_SC->PCONP &= (~PPType) & CLKPWR_PCONP_BITMASK;
    }
}


/*********************************************************************//**
 * @brief         Enter Sleep mode with co-operated instruction by the Cortex-M3.
 * @param[in]    None
 * @return        None
 **********************************************************************/
void CLKPWR_Sleep(void)
{
    LPC_SC->PCON = 0x00;
    /* Sleep Mode*/
    __WFI();
}


/*********************************************************************//**
 * @brief         Enter Deep Sleep mode with co-operated instruction by the Cortex-M3.
 * @param[in]    None
 * @return        None
 **********************************************************************/
void CLKPWR_DeepSleep(void)
{
    /* Deep-Sleep Mode, set SLEEPDEEP bit */
    SCB->SCR = 0x4;
    LPC_SC->PCON = 0x8;
    /* Deep Sleep Mode*/
    __WFI();
}


/*********************************************************************//**
 * @brief         Enter Power Down mode with co-operated instruction by the Cortex-M3.
 * @param[in]    None
 * @return        None
 **********************************************************************/
void CLKPWR_PowerDown(void)
{
    /* Deep-Sleep Mode, set SLEEPDEEP bit */
    SCB->SCR = 0x4;
    LPC_SC->PCON = 0x09;
    /* Power Down Mode*/
    __WFI();
}


/*********************************************************************//**
 * @brief         Enter Deep Power Down mode with co-operated instruction by the Cortex-M3.
 * @param[in]    None
 * @return        None
 **********************************************************************/
void CLKPWR_DeepPowerDown(void)
{
    /* Deep-Sleep Mode, set SLEEPDEEP bit */
    SCB->SCR = 0x4;
    LPC_SC->PCON = 0x03;
    /* Deep Power Down Mode*/
    __WFI();
}

/**
 * @}
 */

/**
 * @}
 */

/* --------------------------------- End Of File ------------------------------ */