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Firmware2/frameworks/CMSIS/LPC1768/driver/lpc17xx_clkpwr.c

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/**********************************************************************
* $Id$ lpc17xx_clkpwr.c 2010-06-18
*//**
* @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
*
* Copyright(C) 2010, 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.
* Permission to use, copy, modify, and distribute this software and its
* documentation is hereby granted, under NXP Semiconductors'
* relevant copyright in the software, without fee, provided that it
* is used in conjunction with NXP Semiconductors microcontrollers. This
* copyright, permission, and disclaimer notice must appear in all copies of
* this code.
**********************************************************************/
/* 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 = 0x00;
/* 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 = 0x01;
/* 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 ------------------------------ */
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