Diff: lpc17xx_dac.c

Revision:

0:84d7747641aa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc17xx_dac.c	Sun Mar 20 18:45:15 2011 +0000
@@ -0,0 +1,139 @@
+/**
+ * @file		lpc17xx_dac.c
+ * @brief		Contains all functions support for DAC 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 DAC
+ * @{
+ */
+
+/* Includes ------------------------------------------------------------------- */
+#include "lpc17xx_dac.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 _DAC
+
+/* Public Functions ----------------------------------------------------------- */
+/** @addtogroup DAC_Public_Functions
+ * @{
+ */
+
+/*********************************************************************//**
+ * @brief 		Initial ADC configuration
+ * 					- Maximum	current is 700 uA
+ * 					- Value to AOUT is 0
+ * @param[in] 	DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
+ * @return 		None
+ ***********************************************************************/
+void DAC_Init(LPC_DAC_TypeDef *DACx)
+{
+	CHECK_PARAM(PARAM_DACx(DACx));
+	/* Set default clock divider for DAC */
+	// CLKPWR_SetPCLKDiv (CLKPWR_PCLKSEL_DAC, CLKPWR_PCLKSEL_CCLK_DIV_4);
+	//Set maximum current output
+	DAC_SetBias(LPC_DAC,DAC_MAX_CURRENT_700uA);
+}
+
+/*********************************************************************//**
+ * @brief 		Update value to DAC
+ * @param[in] 	DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
+ * @param[in] 	dac_value : value 10 bit to be converted to output
+ * @return 		None
+ ***********************************************************************/
+void DAC_UpdateValue (LPC_DAC_TypeDef *DACx,uint32_t dac_value)
+{
+	uint32_t tmp;
+	CHECK_PARAM(PARAM_DACx(DACx));
+	tmp = DACx->DACR & DAC_BIAS_EN;
+	tmp |= DAC_VALUE(dac_value);
+	// Update value
+	DACx->DACR = tmp;
+}
+
+/*********************************************************************//**
+ * @brief 		Set Maximum current for DAC
+ * @param[in] 	DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
+ * @param[in] 	bias : 0 is 700 uA
+ * 					   1    350 uA
+ * @return 		None
+ ***********************************************************************/
+void DAC_SetBias (LPC_DAC_TypeDef *DACx,uint32_t bias)
+{
+	CHECK_PARAM(PARAM_DAC_CURRENT_OPT(bias));
+	DACx->DACR &=~DAC_BIAS_EN;
+	if (bias  == DAC_MAX_CURRENT_350uA)
+	{
+		DACx->DACR |= DAC_BIAS_EN;
+	}
+}
+
+/*********************************************************************//**
+ * @brief 		To enable the DMA operation and control DMA timer
+ * @param[in]	DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
+ * @param[in] 	DAC_ConverterConfigStruct pointer to DAC_CONVERTER_CFG_Type
+ * 					- DBLBUF_ENA :  enable/disable DACR double buffering feature
+ * 					- CNT_ENA    :  enable/disable timer out counter
+ * 					- DMA_ENA    :	enable/disable DMA access
+ * @return 		None
+ ***********************************************************************/
+void DAC_ConfigDAConverterControl (LPC_DAC_TypeDef *DACx,DAC_CONVERTER_CFG_Type *DAC_ConverterConfigStruct)
+{
+	CHECK_PARAM(PARAM_DACx(DACx));
+	DACx->DACCTRL &= ~DAC_DACCTRL_MASK;
+	if (DAC_ConverterConfigStruct->DBLBUF_ENA)
+		DACx->DACCTRL	|= DAC_DBLBUF_ENA;
+	if (DAC_ConverterConfigStruct->CNT_ENA)
+		DACx->DACCTRL	|= DAC_CNT_ENA;
+	if (DAC_ConverterConfigStruct->DMA_ENA)
+		DACx->DACCTRL	|= DAC_DMA_ENA;
+}
+
+/*********************************************************************//**
+ * @brief 		Set reload value for interrupt/DMA counter
+ * @param[in] 	DACx pointer to LPC_DAC_TypeDef, should be: LPC_DAC
+ * @param[in] 	time_out time out to reload for interrupt/DMA counter
+ * @return 		None
+ ***********************************************************************/
+void DAC_SetDMATimeOut(LPC_DAC_TypeDef *DACx, uint32_t time_out)
+{
+	CHECK_PARAM(PARAM_DACx(DACx));
+	DACx->DACCNTVAL = DAC_CCNT_VALUE(time_out);
+}
+
+/**
+ * @}
+ */
+
+#endif /* _DAC */
+
+/**
+ * @}
+ */
+
+/* --------------------------------- End Of File ------------------------------ */