rt-thread/bsp/lpc178x/drivers/lpc177x_8x_clkpwr.c

/**********************************************************************
* $Id$		lpc177x_8x_clkpwr.c			2011-06-02
*//**
* @file		lpc177x_8x_clkpwr.c
* @brief	Contains all functions support for Clock and Power Control
*			firmware library on LPC177x_8x
* @version	1.0
* @date		02. June. 2011
* @author	NXP MCU SW Application Team
* 
* Copyright(C) 2011, NXP Semiconductor
* All rights reserved.
*
***********************************************************************
* 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 "lpc177x_8x_clkpwr.h"


uint32_t USBFrequency = 0;
uint32_t SPIFIFrequency = 0;
/* Public Functions ----------------------------------------------------------- */
/** @addtogroup CLKPWR_Public_Functions
 * @{
 */

/*********************************************************************//**
 * @brief 		Set value of each Peripheral Clock Selection
 * @param[in]	ClkType clock type that will be divided, should be:
 * 				- CLKPWR_CLKTYPE_CPU 		: CPU clock
 * 				- CLKPWR_CLKTYPE_PER		: Peripheral clock
 * 				- CLKPWR_CLKTYPE_EMC 		: EMC clock
 * 				- CLKPWR_CLKTYPE_USB 		: USB clock
 * @param[in]	DivVal	Value of divider. This value should be set as follows:
 * 					- CPU clock: DivVal must be in range: 0..31
 * 					- Peripheral clock: DivVal must be in range: 0..31
 * 					- EMC clock: DivVal must be:
 * 							+ 0: The EMC uses the same clock as the CPU
 * 							+ 1: The EMC uses a clock at half the rate of the CPU
 *   				- USB clock: DivVal must be:
 * 							+ 0: the divider is turned off, no clock will
 * 								 be provided to the USB subsystem
 * 							+ 4: PLL0 output is divided by 4. PLL0 output must be 192MHz
 * 							+ 6: PLL0 output is divided by 6. PLL0 output must be 288MHz
 * @return none
 * Note: Pls assign right DivVal, this function will not check if it is illegal.
 **********************************************************************/
void CLKPWR_SetCLKDiv (uint8_t ClkType, uint8_t DivVal)
{
	switch(ClkType)
	{
	case CLKPWR_CLKTYPE_CPU:
		LPC_SC->CCLKSEL = DivVal;
		SystemCoreClockUpdate(); //Update clock
		break;
	case CLKPWR_CLKTYPE_PER:
		LPC_SC->PCLKSEL = DivVal;
		SystemCoreClockUpdate(); //Update clock
		break;
	case CLKPWR_CLKTYPE_EMC:
		LPC_SC->EMCCLKSEL = DivVal;
		SystemCoreClockUpdate(); //Update clock
		break;
	case CLKPWR_CLKTYPE_USB:
		LPC_SC->USBCLKSEL &= ~(0x0000001F);
		LPC_SC->USBCLKSEL |= DivVal;
		break;
	default:
		while(1);//Error Loop;
	}
}

/*********************************************************************//**
 * @brief 		Get current clock value
 * @param[in]	ClkType clock type that will be divided, should be:
 * 				- CLKPWR_CLKTYPE_CPU 		: CPU clock
 * 				- CLKPWR_CLKTYPE_PER		: Peripheral clock
 * 				- CLKPWR_CLKTYPE_EMC 		: EMC clock
 * 				- CLKPWR_CLKTYPE_USB 		: USB clock
 **********************************************************************/
uint32_t CLKPWR_GetCLK (uint8_t ClkType)
{
	switch(ClkType)
	{
		case CLKPWR_CLKTYPE_CPU:
			return SystemCoreClock;

		case CLKPWR_CLKTYPE_PER:
			return PeripheralClock;

		case CLKPWR_CLKTYPE_EMC:
			return EMCClock;

		case CLKPWR_CLKTYPE_USB:
			return USBClock;

		default:
			while(1);//error loop
	}
}

/*********************************************************************//**
 * @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_PCLCD		: LCD
 *     			-  CLKPWR_PCONP_PCTIM0 		: Timer 0
				-  CLKPWR_PCONP_PCTIM1 		: Timer 1
				-  CLKPWR_PCONP_PCUART0  	: UART 0
				-  CLKPWR_PCONP_PCUART1   	: UART 1
				-  CLKPWR_PCONP_PCPWM0		: PWM 0
				-  CLKPWR_PCONP_PCPWM1 		: PWM 1
				-  CLKPWR_PCONP_PCI2C0 		: I2C 0
				-  CLKPWR_PCONP_PCUART4		: UART4
				-  CLKPWR_PCONP_PCRTC   	: RTC
				-  CLKPWR_PCONP_PCSSP1 		: SSP 1
				-  CLKPWR_PCONP_PCEMC		: EMC
				-  CLKPWR_PCONP_PCADC   		: ADC
				-  CLKPWR_PCONP_PCAN1   	: CAN 1
				-  CLKPWR_PCONP_PCAN2   	: CAN 2
				-  CLKPWR_PCONP_PCGPIO 		: GPIO
				-  CLKPWR_PCONP_PCMC 		: MCPWM
				-  CLKPWR_PCONP_PCQEI 		: QEI
				-  CLKPWR_PCONP_PCI2C1   	: I2C 1
				-  CLKPWR_PCONP_PCSSP2		: SSP 2
				-  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_PCSDC		: SDC
				-  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;
	}
	else if (NewState == DISABLE)
	{
		LPC_SC->PCONP &= ~PPType;
	}
}

#if 0
// nxp21346
/*********************************************************************//**
 * @brief 		Configure hardware reset for each peripheral according to NewState
 * @param[in]	PPType	Type of peripheral used to enable power,
 *     			should be one of the following:
 *     			-  CLKPWR_RSTCON0_LCD		: LCD
 *     			-  CLKPWR_RSTCON0_TIM0 		: Timer 0
				-  CLKPWR_RSTCON0_TIM1 		: Timer 1
				-  CLKPWR_RSTCON0_UART0  	: UART 0
				-  CLKPWR_RSTCON0_UART1   	: UART 1
				-  CLKPWR_RSTCON0_PWM0 		: PWM 0
				-  CLKPWR_RSTCON0_PWM1 		: PWM 1
				-  CLKPWR_RSTCON0_I2C0		: I2C 0
				-  CLKPWR_RSTCON0_UART4   	: UART 4
				-  CLKPWR_RSTCON0_RTC 		: RTC
				-  CLKPWR_RSTCON0_SSP1		: SSP 1
				-  CLKPWR_RSTCON0_EMC   	: EMC
				-  CLKPWR_RSTCON0_ADC   	: ADC
				-  CLKPWR_RSTCON0_CAN1   	: CAN 1
				-  CLKPWR_RSTCON0_CAN2 		: CAN 2
				-  CLKPWR_RSTCON0_GPIO 		: GPIO
				-  CLKPWR_RSTCON0_MCPWM 	: MCPWM
				-  CLKPWR_RSTCON0_QEI   	: QEI
				-  CLKPWR_RSTCON0_I2C1		: I2C 1
				-  CLKPWR_RSTCON0_SSP2 		: SSP 2
				-  CLKPWR_RSTCON0_SSP0 		: SSP 0
				-  CLKPWR_RSTCON0_TIM2 		: Timer 2
				-  CLKPWR_RSTCON0_TIM3  	: Timer 3
				-  CLKPWR_RSTCON0_UART2  	: UART 2
				-  CLKPWR_RSTCON0_UART3   	: UART 3
				-  CLKPWR_RSTCON0_I2C2 		: I2C 2
				-  CLKPWR_RSTCON0_I2S   	: I2S
				-  CLKPWR_RSTCON0_SDC		: SDC
				-  CLKPWR_RSTCON0_GPDMA   	: GPDMA
				-  CLKPWR_RSTCON0_ENET 		: Ethernet
				-  CLKPWR_RSTCON0_USB   	: 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_ConfigReset(uint8_t PType, FunctionalState NewState)
{
	if(PType < 32)
	{
		if(NewState == ENABLE)
			LPC_SC->RSTCON0 |=(1<<PType);
		else
			LPC_SC->RSTCON0 &=~(1<<PType);
	}
	else
	{
		if(NewState == ENABLE)
			LPC_SC->RSTCON1 |= (1<<(PType - 31));
		else
			LPC_SC->RSTCON1 &= ~(1<<(PType - 31));
	}
}
// nxp21346
#endif

/*********************************************************************//**
 * @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 ------------------------------ */