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Diff: lpc17xx_clkpwr.c
- Revision:
- 32:1e1e7730b6c8
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc17xx_clkpwr.c Mon Jun 16 15:36:29 2014 +0000
@@ -0,0 +1,338 @@
+/***********************************************************************//**
+ * @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 ------------------------------ */