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ea6d73f140
1. Upgrade Cortex driver library (CMSIS -> CMSIS & Device): version 2.3.2 -> 3.0.1 & 3.0.0 - Remove "bsp/efm32/Libraries/CMSIS/Lib/ARM", "bsp/efm32/Libraries/CMSIS/Lib/G++" and "bsp/efm32/Libraries/CMSIS/SVD" to save space 2. Upgrade EFM32 driver libraries (efm32lib -> emlib): version 2.3.2 -> 3.0.0 - Remove "bsp/efm32/Libraries/Device/EnergyMicro/EFM32LG" and "bsp/efm32/Libraries/Device/EnergyMicro/EFM32TG" to save space 3. Upgrade EFM32GG_DK3750 development kit driver library: version 1.2.2 -> 2.0.1 4. Upgrade EFM32_Gxxx_DK development kit driver library: version 1.7.3 -> 2.0.1 5. Add energy management unit driver and test code 6. Modify linker script and related code to compatible with new version of libraries 7. Change EFM32 branch version number to 1.0 8. Add photo frame demo application git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2122 bbd45198-f89e-11dd-88c7-29a3b14d5316
318 lines
12 KiB
C
318 lines
12 KiB
C
/***************************************************************************//**
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* @file
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* @brief Digital to Analog Converter (DAC) peripheral API
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* @author Energy Micro AS
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* @version 3.0.0
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*******************************************************************************
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* @section License
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* <b>(C) Copyright 2012 Energy Micro AS, http://www.energymicro.com</b>
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*******************************************************************************
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*
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* DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Energy Micro AS has no
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* obligation to support this Software. Energy Micro AS is providing the
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* Software "AS IS", with no express or implied warranties of any kind,
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* including, but not limited to, any implied warranties of merchantability
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* or fitness for any particular purpose or warranties against infringement
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* of any proprietary rights of a third party.
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*
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* Energy Micro AS will not be liable for any consequential, incidental, or
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* special damages, or any other relief, or for any claim by any third party,
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* arising from your use of this Software.
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*
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******************************************************************************/
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#ifndef __EM_DAC_H
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#define __EM_DAC_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdbool.h>
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#include "em_part.h"
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/***************************************************************************//**
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* @addtogroup EM_Library
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* @{
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******************************************************************************/
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/***************************************************************************//**
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* @addtogroup DAC
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* @{
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******************************************************************************/
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/** @cond DO_NOT_INCLUDE_WITH_DOXYGEN */
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/** Validation of DAC register block pointer reference for assert statements. */
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#define DAC_REF_VALID(ref) ((ref) == DAC0)
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/** @endcond */
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/*******************************************************************************
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******************************** ENUMS ************************************
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******************************************************************************/
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/** Conversion mode. */
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typedef enum
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{
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dacConvModeContinuous = _DAC_CTRL_CONVMODE_CONTINUOUS, /**< Continuous mode. */
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dacConvModeSampleHold = _DAC_CTRL_CONVMODE_SAMPLEHOLD, /**< Sample/hold mode. */
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dacConvModeSampleOff = _DAC_CTRL_CONVMODE_SAMPLEOFF /**< Sample/shut off mode. */
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} DAC_ConvMode_TypeDef;
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/** Output mode. */
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typedef enum
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{
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dacOutputDisable = _DAC_CTRL_OUTMODE_DISABLE, /**< Output to pin and ADC disabled. */
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dacOutputPin = _DAC_CTRL_OUTMODE_PIN, /**< Output to pin only. */
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dacOutputADC = _DAC_CTRL_OUTMODE_ADC, /**< Output to ADC only */
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dacOutputPinADC = _DAC_CTRL_OUTMODE_PINADC /**< Output to pin and ADC. */
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} DAC_Output_TypeDef;
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/** Peripheral Reflex System signal used to trigger single sample. */
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typedef enum
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{
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dacPRSSELCh0 = _DAC_CH0CTRL_PRSSEL_PRSCH0, /**< PRS channel 0. */
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dacPRSSELCh1 = _DAC_CH0CTRL_PRSSEL_PRSCH1, /**< PRS channel 1. */
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dacPRSSELCh2 = _DAC_CH0CTRL_PRSSEL_PRSCH2, /**< PRS channel 2. */
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dacPRSSELCh3 = _DAC_CH0CTRL_PRSSEL_PRSCH3, /**< PRS channel 3. */
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dacPRSSELCh4 = _DAC_CH0CTRL_PRSSEL_PRSCH4, /**< PRS channel 4. */
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dacPRSSELCh5 = _DAC_CH0CTRL_PRSSEL_PRSCH5, /**< PRS channel 5. */
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dacPRSSELCh6 = _DAC_CH0CTRL_PRSSEL_PRSCH6, /**< PRS channel 6. */
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dacPRSSELCh7 = _DAC_CH0CTRL_PRSSEL_PRSCH7 /**< PRS channel 7. */
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} DAC_PRSSEL_TypeDef;
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/** Reference voltage for DAC. */
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typedef enum
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{
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dacRef1V25 = _DAC_CTRL_REFSEL_1V25, /**< Internal 1.25V bandgap reference. */
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dacRef2V5 = _DAC_CTRL_REFSEL_2V5, /**< Internal 2.5V bandgap reference. */
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dacRefVDD = _DAC_CTRL_REFSEL_VDD /**< VDD reference. */
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} DAC_Ref_TypeDef;
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/** Refresh interval. */
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typedef enum
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{
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dacRefresh8 = _DAC_CTRL_REFRSEL_8CYCLES, /**< Refresh every 8 prescaled cycles. */
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dacRefresh16 = _DAC_CTRL_REFRSEL_16CYCLES, /**< Refresh every 16 prescaled cycles. */
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dacRefresh32 = _DAC_CTRL_REFRSEL_32CYCLES, /**< Refresh every 32 prescaled cycles. */
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dacRefresh64 = _DAC_CTRL_REFRSEL_64CYCLES /**< Refresh every 64 prescaled cycles. */
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} DAC_Refresh_TypeDef;
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/*******************************************************************************
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******************************* STRUCTS ***********************************
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******************************************************************************/
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/** DAC init structure, common for both channels. */
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typedef struct
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{
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/** Refresh interval. Only used if REFREN bit set for a DAC channel. */
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DAC_Refresh_TypeDef refresh;
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/** Reference voltage to use. */
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DAC_Ref_TypeDef reference;
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/** Output mode */
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DAC_Output_TypeDef outMode;
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/** Conversion mode. */
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DAC_ConvMode_TypeDef convMode;
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/**
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* Prescaler used to get DAC clock. Derived as follows:
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* DACclk=HFPERclk/(2^prescale). The DAC clock should be <= 1MHz.
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*/
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uint8_t prescale;
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/** Enable/disable use of low pass filter on output. */
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bool lpEnable;
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/** Enable/disable reset of prescaler on ch0 start. */
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bool ch0ResetPre;
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/** Enable/disable output enable control by CH1 PRS signal. */
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bool outEnablePRS;
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/** Enable/disable sine mode. */
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bool sineEnable;
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/** Select if single ended or differential mode. */
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bool diff;
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} DAC_Init_TypeDef;
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/** Default config for DAC init structure. */
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#define DAC_INIT_DEFAULT \
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{ dacRefresh8, /* Refresh every 8 prescaled cycles. */ \
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dacRef1V25, /* 1.25V internal reference. */ \
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dacOutputPin, /* Output to pin only. */ \
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dacConvModeContinuous, /* Continuous mode. */ \
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0, /* No prescaling. */ \
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false, /* Do not enable low pass filter. */ \
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false, /* Do not reset prescaler on ch0 start. */ \
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false, /* DAC output enable always on. */ \
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false, /* Disable sine mode. */ \
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false /* Single ended mode. */ \
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}
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/** DAC channel init structure. */
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typedef struct
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{
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/** Enable channel. */
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bool enable;
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/**
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* Peripheral reflex system trigger enable. If false, channel is triggered
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* by writing to CHnDATA.
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*/
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bool prsEnable;
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/**
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* Enable/disable automatic refresh of channel. Refresh interval must be
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* defined in common control init, please see DAC_Init().
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*/
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bool refreshEnable;
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/**
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* Peripheral reflex system trigger selection. Only applicable if @p prsEnable
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* is enabled.
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*/
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DAC_PRSSEL_TypeDef prsSel;
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} DAC_InitChannel_TypeDef;
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/** Default config for DAC channel init structure. */
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#define DAC_INITCHANNEL_DEFAULT \
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{ false, /* Leave channel disabled when init done. */ \
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false, /* Disable PRS triggering. */ \
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false, /* Channel not refreshed automatically. */ \
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dacPRSSELCh0 /* Select PRS ch0 (if PRS triggering enabled). */ \
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}
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/*******************************************************************************
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***************************** PROTOTYPES **********************************
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******************************************************************************/
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void DAC_Enable(DAC_TypeDef *dac, unsigned int ch, bool enable);
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void DAC_Init(DAC_TypeDef *dac, const DAC_Init_TypeDef *init);
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void DAC_InitChannel(DAC_TypeDef *dac,
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const DAC_InitChannel_TypeDef *init,
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unsigned int ch);
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/***************************************************************************//**
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* @brief
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* Clear one or more pending DAC interrupts.
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*
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* @param[in] dac
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* Pointer to DAC peripheral register block.
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*
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* @param[in] flags
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* Pending DAC interrupt source to clear. Use a bitwise logic OR combination of
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* valid interrupt flags for the DAC module (DAC_IF_nnn).
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******************************************************************************/
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__STATIC_INLINE void DAC_IntClear(DAC_TypeDef *dac, uint32_t flags)
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{
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dac->IFC = flags;
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}
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/***************************************************************************//**
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* @brief
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* Disable one or more DAC interrupts.
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*
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* @param[in] dac
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* Pointer to DAC peripheral register block.
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*
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* @param[in] flags
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* DAC interrupt sources to disable. Use a bitwise logic OR combination of
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* valid interrupt flags for the DAC module (DAC_IF_nnn).
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******************************************************************************/
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__STATIC_INLINE void DAC_IntDisable(DAC_TypeDef *dac, uint32_t flags)
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{
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dac->IEN &= ~(flags);
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}
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/***************************************************************************//**
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* @brief
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* Enable one or more DAC interrupts.
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*
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* @note
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* Depending on the use, a pending interrupt may already be set prior to
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* enabling the interrupt. Consider using DAC_IntClear() prior to enabling
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* if such a pending interrupt should be ignored.
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*
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* @param[in] dac
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* Pointer to DAC peripheral register block.
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*
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* @param[in] flags
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* DAC interrupt sources to enable. Use a bitwise logic OR combination of
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* valid interrupt flags for the DAC module (DAC_IF_nnn).
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******************************************************************************/
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__STATIC_INLINE void DAC_IntEnable(DAC_TypeDef *dac, uint32_t flags)
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{
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dac->IEN |= flags;
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}
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/***************************************************************************//**
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* @brief
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* Get pending DAC interrupt flags.
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*
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* @note
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* The event bits are not cleared by the use of this function.
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*
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* @param[in] dac
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* Pointer to DAC peripheral register block.
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*
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* @return
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* DAC interrupt sources pending. A bitwise logic OR combination of valid
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* interrupt flags for the DAC module (DAC_IF_nnn).
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******************************************************************************/
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__STATIC_INLINE uint32_t DAC_IntGet(DAC_TypeDef *dac)
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{
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return(dac->IF);
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}
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/***************************************************************************//**
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* @brief
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* Set one or more pending DAC interrupts from SW.
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*
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* @param[in] dac
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* Pointer to DAC peripheral register block.
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*
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* @param[in] flags
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* DAC interrupt sources to set to pending. Use a bitwise logic OR combination
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* of valid interrupt flags for the DAC module (DAC_IF_nnn).
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******************************************************************************/
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__STATIC_INLINE void DAC_IntSet(DAC_TypeDef *dac, uint32_t flags)
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{
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dac->IFS = flags;
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}
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uint8_t DAC_PrescaleCalc(uint32_t dacFreq, uint32_t hfperFreq);
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void DAC_Reset(DAC_TypeDef *dac);
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/** @} (end addtogroup DAC) */
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/** @} (end addtogroup EM_Library) */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __EM_DAC_H */
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