Diff: lpc17xx_rit.c

Revision:

0:84d7747641aa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc17xx_rit.c	Sun Mar 20 18:45:15 2011 +0000
@@ -0,0 +1,187 @@
+/***********************************************************************//**
+ * @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
+ **************************************************************************
+ * 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 ------------------------------ */