diff options
Diffstat (limited to 'arch/arm/lpc17xx/Drivers/source/lpc17xx_dac.c')
| -rw-r--r-- | arch/arm/lpc17xx/Drivers/source/lpc17xx_dac.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/arch/arm/lpc17xx/Drivers/source/lpc17xx_dac.c b/arch/arm/lpc17xx/Drivers/source/lpc17xx_dac.c new file mode 100644 index 0000000..5f2d7fb --- /dev/null +++ b/arch/arm/lpc17xx/Drivers/source/lpc17xx_dac.c @@ -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 ------------------------------ */
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