Diff: source/lpc17xx_clkpwr.c

Revision:

0:1063a091a062

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/source/lpc17xx_clkpwr.c	Wed Feb 17 16:22:39 2010 +0000
@@ -0,0 +1,344 @@
+/**
+ * @file	: lpc17xx_clkpwr.c
+ * @brief	: Contains all functions support for Clock and Power Control
+ * 				firmware library on LPC17xx
+ * @version	: 1.0
+ * @date	: 18. Mar. 2009
+ * @author	: HieuNguyen
+ **************************************************************************
+ * 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 = 0x00;
+	/* 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;
+	/* Sleep 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;
+	/* Sleep Mode*/
+	__WFI();
+}
+
+
+/**
+ * @brief 		Configure Brown-Out function in
+ */
+
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/* --------------------------------- End Of File ------------------------------ */