Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_rit.c

Revision:

2:1df0b61d3b5a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libs/LPC17xx/LPC17xxLib/src/lpc17xx_rit.c	Fri Feb 28 18:52:52 2014 -0800
@@ -0,0 +1,196 @@
+#ifdef __LPC17XX__
+
+/**********************************************************************
+* $Id$		lpc17xx_rit.c				2010-05-21
+*//**
+* @file		lpc17xx_rit.c
+* @brief	Contains all functions support for RIT firmware library on LPC17xx
+* @version	2.0
+* @date		21. May. 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.
+**********************************************************************/
+
+/* Peripheral group ----------------------------------------------------------- */
+/** @addtogroup RIT
+ * @{
+ */
+
+/* Includes ------------------------------------------------------------------- */
+#include "lpc17xx_rit.h"
+#include "lpc17xx_clkpwr.h"
+
+/* If this source file built with example, the LPC17xx FW library configuration
+ * file in each example directory ("lpc17xx_libcfg.h") must be included,
+ * otherwise the default FW library configuration file must be included instead
+ */
+#ifdef __BUILD_WITH_EXAMPLE__
+#include "lpc17xx_libcfg.h"
+#else
+#include "lpc17xx_libcfg_default.h"
+#endif /* __BUILD_WITH_EXAMPLE__ */
+
+#ifdef _RIT
+
+/* Public Functions ----------------------------------------------------------- */
+/** @addtogroup RIT_Public_Functions
+ * @{
+ */
+
+/******************************************************************************//*
+ * @brief 		Initial for RIT
+ * 					- Turn on power and clock
+ * 					- Setup default register values
+ * @param[in]	RITx is RIT peripheral selected, should be: LPC_RIT
+ * @return 		None
+ *******************************************************************************/
+void RIT_Init(LPC_RIT_TypeDef *RITx)
+{
+	CHECK_PARAM(PARAM_RITx(RITx));
+	CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCRIT, ENABLE);
+	//Set up default register values
+	RITx->RICOMPVAL = 0xFFFFFFFF;
+	RITx->RIMASK	= 0x00000000;
+	RITx->RICTRL	= 0x0C;
+	RITx->RICOUNTER	= 0x00000000;
+	// Turn on power and clock
+
+}
+/******************************************************************************//*
+ * @brief 		DeInitial for RIT
+ * 					- Turn off power and clock
+ * 					- ReSetup default register values
+ * @param[in]	RITx is RIT peripheral selected, should be: LPC_RIT
+ * @return 		None
+ *******************************************************************************/
+void RIT_DeInit(LPC_RIT_TypeDef *RITx)
+{
+	CHECK_PARAM(PARAM_RITx(RITx));
+
+	// Turn off power and clock
+	CLKPWR_ConfigPPWR (CLKPWR_PCONP_PCRIT, DISABLE);
+	//ReSetup default register values
+	RITx->RICOMPVAL = 0xFFFFFFFF;
+	RITx->RIMASK	= 0x00000000;
+	RITx->RICTRL	= 0x0C;
+	RITx->RICOUNTER	= 0x00000000;
+}
+
+/******************************************************************************//*
+ * @brief 		Set compare value, mask value and time counter value
+ * @param[in]	RITx is RIT peripheral selected, should be: LPC_RIT
+ * @param[in]	time_interval: timer interval value (ms)
+ * @return 		None
+ *******************************************************************************/
+void RIT_TimerConfig(LPC_RIT_TypeDef *RITx, uint32_t time_interval)
+{
+	uint32_t clock_rate, cmp_value;
+	CHECK_PARAM(PARAM_RITx(RITx));
+
+	// Get PCLK value of RIT
+	clock_rate = CLKPWR_GetPCLK(CLKPWR_PCLKSEL_RIT);
+
+	/* calculate compare value for RIT to generate interrupt at
+	 * specified time interval
+	 * COMPVAL = (RIT_PCLK * time_interval)/1000
+	 * (with time_interval unit is millisecond)
+	 */
+	cmp_value = (clock_rate /1000) * time_interval;
+	RITx->RICOMPVAL = cmp_value;
+
+	/* Set timer enable clear bit to clear timer to 0 whenever
+	 * counter value equals the contents of RICOMPVAL
+	 */
+	RITx->RICTRL |= (1<<1);
+}
+
+
+/******************************************************************************//*
+ * @brief 		Enable/Disable Timer
+ * @param[in]	RITx is RIT peripheral selected, should be: LPC_RIT
+ * @param[in]	NewState 	New State of this function
+ * 					-ENABLE: Enable Timer
+ * 					-DISABLE: Disable Timer
+ * @return 		None
+ *******************************************************************************/
+void RIT_Cmd(LPC_RIT_TypeDef *RITx, FunctionalState NewState)
+{
+	CHECK_PARAM(PARAM_RITx(RITx));
+	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
+
+	//Enable or Disable Timer
+	if(NewState==ENABLE)
+	{
+		RITx->RICTRL |= RIT_CTRL_TEN;
+	}
+	else
+	{
+		RITx->RICTRL &= ~RIT_CTRL_TEN;
+	}
+}
+
+/******************************************************************************//*
+ * @brief 		Timer Enable/Disable on debug
+ * @param[in]	RITx is RIT peripheral selected, should be: LPC_RIT
+ * @param[in]	NewState 	New State of this function
+ * 					-ENABLE: The timer is halted whenever a hardware break condition occurs
+ * 					-DISABLE: Hardware break has no effect on the timer operation
+ * @return 		None
+ *******************************************************************************/
+void RIT_TimerDebugCmd(LPC_RIT_TypeDef *RITx, FunctionalState NewState)
+{
+	CHECK_PARAM(PARAM_RITx(RITx));
+	CHECK_PARAM(PARAM_FUNCTIONALSTATE(NewState));
+
+	//Timer Enable/Disable on break
+	if(NewState==ENABLE)
+	{
+		RITx->RICTRL |= RIT_CTRL_ENBR;
+	}
+	else
+	{
+		RITx->RICTRL &= ~RIT_CTRL_ENBR;
+	}
+}
+/******************************************************************************//*
+ * @brief 		Check whether interrupt flag is set or not
+ * @param[in]	RITx is RIT peripheral selected, should be: LPC_RIT
+ * @return 		Current interrupt status, could be: SET/RESET
+ *******************************************************************************/
+IntStatus RIT_GetIntStatus(LPC_RIT_TypeDef *RITx)
+{
+	uint8_t result;
+	CHECK_PARAM(PARAM_RITx(RITx));
+	if((RITx->RICTRL&RIT_CTRL_INTEN)==1)	result= SET;
+	else return RESET;
+	//clear interrupt flag
+	RITx->RICTRL |= RIT_CTRL_INTEN;
+	return (IntStatus)result;
+}
+
+/**
+ * @}
+ */
+
+#endif /* _RIT */
+
+/**
+ * @}
+ */
+
+/* --------------------------------- End Of File ------------------------------ */
+#endif /* __LPC17XX__ */