diff options
Diffstat (limited to 'arch/arm/lpc17xx/Drivers/source/lpc17xx_rit.c')
| -rw-r--r-- | arch/arm/lpc17xx/Drivers/source/lpc17xx_rit.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/arch/arm/lpc17xx/Drivers/source/lpc17xx_rit.c b/arch/arm/lpc17xx/Drivers/source/lpc17xx_rit.c new file mode 100644 index 0000000..4df19ac --- /dev/null +++ b/arch/arm/lpc17xx/Drivers/source/lpc17xx_rit.c @@ -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 result;
+}
+
+/**
+ * @}
+ */
+
+#endif /* _RIT */
+
+/**
+ * @}
+ */
+
+/* --------------------------------- End Of File ------------------------------ */
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