EFR32 Mighty Gecko 1 Software Documentation  efr32mg1-doc-5.1.2
IDAC

Detailed Description

Current Digital-to-Analog Converter (IDAC) Peripheral API.

The current digital-to-analog converter (IDAC) can source or sink a configurable constant current, which can be output on, or sinked from pin or ADC. The current is configurable with several ranges of various step sizes. The IDAC can be used with PRS and it can operate down to EM3.

The following steps are necessary for basic operation:

Clock enable:

/* IDAC is a HFPERCLK peripheral */

Initialize the peripheral with default settings and modify selected fields such as output select:

/* Initialize with default settings. Change output to APORT1YCH1. */
IDAC_Init(IDAC0, &init);

Set output:

/* Set 50nA step and enable output */

Data Structures

struct  IDAC_Init_TypeDef
 

Macros

#define IDAC_INIT_DEFAULT
 

Enumerations

enum  IDAC_OutMode_TypeDef {
  idacOutputAPORT1XCH0 = IDAC_CTRL_APORTOUTSEL_APORT1XCH0,
  idacOutputAPORT1YCH1 = IDAC_CTRL_APORTOUTSEL_APORT1YCH1,
  idacOutputAPORT1XCH2 = IDAC_CTRL_APORTOUTSEL_APORT1XCH2,
  idacOutputAPORT1YCH3 = IDAC_CTRL_APORTOUTSEL_APORT1YCH3,
  idacOutputAPORT1XCH4 = IDAC_CTRL_APORTOUTSEL_APORT1XCH4,
  idacOutputAPORT1YCH5 = IDAC_CTRL_APORTOUTSEL_APORT1YCH5,
  idacOutputAPORT1XCH6 = IDAC_CTRL_APORTOUTSEL_APORT1XCH6,
  idacOutputAPORT1YCH7 = IDAC_CTRL_APORTOUTSEL_APORT1YCH7,
  idacOutputAPORT1XCH8 = IDAC_CTRL_APORTOUTSEL_APORT1XCH8,
  idacOutputAPORT1YCH9 = IDAC_CTRL_APORTOUTSEL_APORT1YCH9,
  idacOutputAPORT1XCH10 = IDAC_CTRL_APORTOUTSEL_APORT1XCH10,
  idacOutputAPORT1YCH11 = IDAC_CTRL_APORTOUTSEL_APORT1YCH11,
  idacOutputAPORT1XCH12 = IDAC_CTRL_APORTOUTSEL_APORT1XCH12,
  idacOutputAPORT1YCH13 = IDAC_CTRL_APORTOUTSEL_APORT1YCH13,
  idacOutputAPORT1XCH14 = IDAC_CTRL_APORTOUTSEL_APORT1XCH14,
  idacOutputAPORT1YCH15 = IDAC_CTRL_APORTOUTSEL_APORT1YCH15,
  idacOutputAPORT1XCH16 = IDAC_CTRL_APORTOUTSEL_APORT1XCH16,
  idacOutputAPORT1YCH17 = IDAC_CTRL_APORTOUTSEL_APORT1YCH17,
  idacOutputAPORT1XCH18 = IDAC_CTRL_APORTOUTSEL_APORT1XCH18,
  idacOutputAPORT1YCH19 = IDAC_CTRL_APORTOUTSEL_APORT1YCH19,
  idacOutputAPORT1XCH20 = IDAC_CTRL_APORTOUTSEL_APORT1XCH20,
  idacOutputAPORT1YCH21 = IDAC_CTRL_APORTOUTSEL_APORT1YCH21,
  idacOutputAPORT1XCH22 = IDAC_CTRL_APORTOUTSEL_APORT1XCH22,
  idacOutputAPORT1YCH23 = IDAC_CTRL_APORTOUTSEL_APORT1YCH23,
  idacOutputAPORT1XCH24 = IDAC_CTRL_APORTOUTSEL_APORT1XCH24,
  idacOutputAPORT1YCH25 = IDAC_CTRL_APORTOUTSEL_APORT1YCH25,
  idacOutputAPORT1XCH26 = IDAC_CTRL_APORTOUTSEL_APORT1XCH26,
  idacOutputAPORT1YCH27 = IDAC_CTRL_APORTOUTSEL_APORT1YCH27,
  idacOutputAPORT1XCH28 = IDAC_CTRL_APORTOUTSEL_APORT1XCH28,
  idacOutputAPORT1YCH29 = IDAC_CTRL_APORTOUTSEL_APORT1YCH29,
  idacOutputAPORT1XCH30 = IDAC_CTRL_APORTOUTSEL_APORT1XCH30,
  idacOutputAPORT1YCH31 = IDAC_CTRL_APORTOUTSEL_APORT1YCH31
}
 
enum  IDAC_PRSSEL_TypeDef {
  idacPRSSELCh0 = IDAC_CTRL_PRSSEL_PRSCH0,
  idacPRSSELCh1 = IDAC_CTRL_PRSSEL_PRSCH1,
  idacPRSSELCh2 = IDAC_CTRL_PRSSEL_PRSCH2,
  idacPRSSELCh3 = IDAC_CTRL_PRSSEL_PRSCH3,
  idacPRSSELCh4 = IDAC_CTRL_PRSSEL_PRSCH4,
  idacPRSSELCh5 = IDAC_CTRL_PRSSEL_PRSCH5,
  idacPRSSELCh6 = IDAC_CTRL_PRSSEL_PRSCH6,
  idacPRSSELCh7 = IDAC_CTRL_PRSSEL_PRSCH7,
  idacPRSSELCh8 = IDAC_CTRL_PRSSEL_PRSCH8,
  idacPRSSELCh9 = IDAC_CTRL_PRSSEL_PRSCH9,
  idacPRSSELCh10 = IDAC_CTRL_PRSSEL_PRSCH10,
  idacPRSSELCh11 = IDAC_CTRL_PRSSEL_PRSCH11
}
 
enum  IDAC_Range_TypeDef {
  idacCurrentRange0 = IDAC_CURPROG_RANGESEL_RANGE0,
  idacCurrentRange1 = IDAC_CURPROG_RANGESEL_RANGE1,
  idacCurrentRange2 = IDAC_CURPROG_RANGESEL_RANGE2,
  idacCurrentRange3 = IDAC_CURPROG_RANGESEL_RANGE3
}
 

Functions

void IDAC_Enable (IDAC_TypeDef *idac, bool enable)
 Enable/disable IDAC. More...
 
void IDAC_Init (IDAC_TypeDef *idac, const IDAC_Init_TypeDef *init)
 Initialize IDAC. More...
 
__STATIC_INLINE void IDAC_IntClear (IDAC_TypeDef *idac, uint32_t flags)
 Clear one or more pending IDAC interrupts. More...
 
__STATIC_INLINE void IDAC_IntDisable (IDAC_TypeDef *idac, uint32_t flags)
 Disable one or more IDAC interrupts. More...
 
__STATIC_INLINE void IDAC_IntEnable (IDAC_TypeDef *idac, uint32_t flags)
 Enable one or more IDAC interrupts. More...
 
__STATIC_INLINE uint32_t IDAC_IntGet (IDAC_TypeDef *idac)
 Get pending IDAC interrupt flags. More...
 
__STATIC_INLINE uint32_t IDAC_IntGetEnabled (IDAC_TypeDef *idac)
 Get enabled and pending IDAC interrupt flags. Useful for handling more interrupt sources in the same interrupt handler. More...
 
__STATIC_INLINE void IDAC_IntSet (IDAC_TypeDef *idac, uint32_t flags)
 Set one or more pending IDAC interrupts from SW. More...
 
void IDAC_MinimalOutputTransitionMode (IDAC_TypeDef *idac, bool enable)
 Enable/disable Minimal Output Transition mode. More...
 
void IDAC_OutEnable (IDAC_TypeDef *idac, bool enable)
 Enable/disable the IDAC OUT pin. More...
 
void IDAC_RangeSet (IDAC_TypeDef *idac, const IDAC_Range_TypeDef range)
 Set the current range of the IDAC output. More...
 
void IDAC_Reset (IDAC_TypeDef *idac)
 Reset IDAC to same state as after a HW reset. More...
 
void IDAC_StepSet (IDAC_TypeDef *idac, const uint32_t step)
 Set the current step of the IDAC output. More...
 

Macro Definition Documentation

#define IDAC_INIT_DEFAULT
Value:

Default config for IDAC init structure.

Definition at line 209 of file em_idac.h.

Enumeration Type Documentation

Output mode.

Enumerator
idacOutputAPORT1XCH0 

Output to APORT 1X CH0

idacOutputAPORT1YCH1 

Output to APORT 1Y CH1

idacOutputAPORT1XCH2 

Output to APORT 1X CH2

idacOutputAPORT1YCH3 

Output to APORT 1Y CH3

idacOutputAPORT1XCH4 

Output to APORT 1X CH4

idacOutputAPORT1YCH5 

Output to APORT 1Y CH5

idacOutputAPORT1XCH6 

Output to APORT 1X CH6

idacOutputAPORT1YCH7 

Output to APORT 1Y CH7

idacOutputAPORT1XCH8 

Output to APORT 1X CH8

idacOutputAPORT1YCH9 

Output to APORT 1Y CH9

idacOutputAPORT1XCH10 

Output to APORT 1X CH10

idacOutputAPORT1YCH11 

Output to APORT 1Y CH11

idacOutputAPORT1XCH12 

Output to APORT 1X CH12

idacOutputAPORT1YCH13 

Output to APORT 1Y CH13

idacOutputAPORT1XCH14 

Output to APORT 1X CH14

idacOutputAPORT1YCH15 

Output to APORT 1Y CH15

idacOutputAPORT1XCH16 

Output to APORT 1X CH16

idacOutputAPORT1YCH17 

Output to APORT 1Y CH17

idacOutputAPORT1XCH18 

Output to APORT 1X CH18

idacOutputAPORT1YCH19 

Output to APORT 1Y CH19

idacOutputAPORT1XCH20 

Output to APORT 1X CH20

idacOutputAPORT1YCH21 

Output to APORT 1Y CH21

idacOutputAPORT1XCH22 

Output to APORT 1X CH22

idacOutputAPORT1YCH23 

Output to APORT 1Y CH23

idacOutputAPORT1XCH24 

Output to APORT 1X CH24

idacOutputAPORT1YCH25 

Output to APORT 1Y CH25

idacOutputAPORT1XCH26 

Output to APORT 1X CH26

idacOutputAPORT1YCH27 

Output to APORT 1Y CH27

idacOutputAPORT1XCH28 

Output to APORT 1X CH28

idacOutputAPORT1YCH29 

Output to APORT 1Y CH29

idacOutputAPORT1XCH30 

Output to APORT 1X CH30

idacOutputAPORT1YCH31 

Output to APORT 1Y CH31

Definition at line 93 of file em_idac.h.

Selects which Peripheral Reflex System (PRS) signal to use when PRS is set to control the IDAC output.

Enumerator
idacPRSSELCh0 

PRS channel 0.

idacPRSSELCh1 

PRS channel 1.

idacPRSSELCh2 

PRS channel 2.

idacPRSSELCh3 

PRS channel 3.

idacPRSSELCh4 

PRS channel 4.

idacPRSSELCh5 

PRS channel 5.

idacPRSSELCh6 

PRS channel 6.

idacPRSSELCh7 

PRS channel 7.

idacPRSSELCh8 

PRS channel 8.

idacPRSSELCh9 

PRS channel 9.

idacPRSSELCh10 

PRS channel 10

idacPRSSELCh11 

PRS channel 11

Definition at line 137 of file em_idac.h.

Selects which current range to use.

Enumerator
idacCurrentRange0 

current range 0.

idacCurrentRange1 

current range 1.

idacCurrentRange2 

current range 2.

idacCurrentRange3 

current range 3.

Definition at line 159 of file em_idac.h.

Function Documentation

void IDAC_Enable ( IDAC_TypeDef idac,
bool  enable 
)

Enable/disable IDAC.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]enabletrue to enable IDAC, false to disable.

Definition at line 120 of file em_idac.c.

References _IDAC_CTRL_EN_SHIFT, BUS_RegBitWrite(), and IDAC_TypeDef::CTRL.

void IDAC_Init ( IDAC_TypeDef idac,
const IDAC_Init_TypeDef init 
)

Initialize IDAC.

Initializes IDAC according to the initialization structure parameter, and sets the default calibration value stored in the DEVINFO structure.

Note
This function will disable the IDAC prior to configuration.
Parameters
[in]idacPointer to IDAC peripheral register block.
[in]initPointer to IDAC initialization structure.

Definition at line 79 of file em_idac.c.

References IDAC_TypeDef::CTRL, IDAC_Init_TypeDef::enable, IDAC_CTRL_APORTOUTENPRS, IDAC_CTRL_CURSINK, IDAC_CTRL_EN, IDAC_Init_TypeDef::outMode, IDAC_Init_TypeDef::prsEnable, IDAC_Init_TypeDef::prsSel, and IDAC_Init_TypeDef::sinkEnable.

__STATIC_INLINE void IDAC_IntClear ( IDAC_TypeDef idac,
uint32_t  flags 
)

Clear one or more pending IDAC interrupts.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]flagsPending IDAC interrupt source(s) to clear. Use one or more valid interrupt flags for the IDAC module (IDAC_IF_nnn) OR'ed together.

Definition at line 246 of file em_idac.h.

References IDAC_TypeDef::IFC.

__STATIC_INLINE void IDAC_IntDisable ( IDAC_TypeDef idac,
uint32_t  flags 
)

Disable one or more IDAC interrupts.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]flagsIDAC interrupt source(s) to disable. Use one or more valid interrupt flags for the IDAC module (IDAC_IF_nnn) OR'ed together.

Definition at line 263 of file em_idac.h.

References IDAC_TypeDef::IEN.

__STATIC_INLINE void IDAC_IntEnable ( IDAC_TypeDef idac,
uint32_t  flags 
)

Enable one or more IDAC interrupts.

Note
Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. Consider using IDAC_IntClear() prior to enabling if such a pending interrupt should be ignored.
Parameters
[in]idacPointer to IDAC peripheral register block.
[in]flagsIDAC interrupt source(s) to enable. Use one or more valid interrupt flags for the IDAC module (IDAC_IF_nnn) OR'ed together.

Definition at line 285 of file em_idac.h.

References IDAC_TypeDef::IEN.

__STATIC_INLINE uint32_t IDAC_IntGet ( IDAC_TypeDef idac)

Get pending IDAC interrupt flags.

Note
The event bits are not cleared by the use of this function.
Parameters
[in]idacPointer to IDAC peripheral register block.
Returns
IDAC interrupt source(s) pending. Returns one or more valid interrupt flags for the IDAC module (IDAC_IF_nnn) OR'ed together.

Definition at line 305 of file em_idac.h.

References IDAC_TypeDef::IF.

__STATIC_INLINE uint32_t IDAC_IntGetEnabled ( IDAC_TypeDef idac)

Get enabled and pending IDAC interrupt flags. Useful for handling more interrupt sources in the same interrupt handler.

Parameters
[in]idacPointer to IDAC peripheral register block.
Note
Interrupt flags are not cleared by the use of this function.
Returns
Pending and enabled IDAC interrupt sources. The return value is the bitwise AND combination of
  • the OR combination of enabled interrupt sources in IDACx_IEN_nnn register (IDACx_IEN_nnn) and
  • the OR combination of valid interrupt flags of the IDAC module (IDACx_IF_nnn).

Definition at line 330 of file em_idac.h.

References IDAC_TypeDef::IEN, and IDAC_TypeDef::IF.

__STATIC_INLINE void IDAC_IntSet ( IDAC_TypeDef idac,
uint32_t  flags 
)

Set one or more pending IDAC interrupts from SW.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]flagsIDAC interrupt source(s) to set to pending. Use one or more valid interrupt flags for the IDAC module (IDAC_IF_nnn) OR'ed together.

Definition at line 354 of file em_idac.h.

References IDAC_TypeDef::IFS.

void IDAC_MinimalOutputTransitionMode ( IDAC_TypeDef idac,
bool  enable 
)

Enable/disable Minimal Output Transition mode.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]enabletrue to enable Minimal Output Transition mode, false to disable.

Definition at line 173 of file em_idac.c.

References _IDAC_CTRL_MINOUTTRANS_SHIFT, BUS_RegBitWrite(), and IDAC_TypeDef::CTRL.

void IDAC_OutEnable ( IDAC_TypeDef idac,
bool  enable 
)

Enable/disable the IDAC OUT pin.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]enabletrue to enable the IDAC OUT pin, false to disable.

Definition at line 347 of file em_idac.c.

References _IDAC_CTRL_APORTOUTEN_SHIFT, BUS_RegBitWrite(), and IDAC_TypeDef::CTRL.

void IDAC_Reset ( IDAC_TypeDef idac)

Reset IDAC to same state as after a HW reset.

Parameters
[in]idacPointer to IDAC peripheral register block.

Definition at line 134 of file em_idac.c.

References _IDAC_CTRL_RESETVALUE, _IDAC_CURPROG_RESETVALUE, _IDAC_CURPROG_STEPSEL_SHIFT, _IDAC_DUTYCONFIG_RESETVALUE, IDAC_TypeDef::CTRL, IDAC_TypeDef::CURPROG, IDAC_TypeDef::DUTYCONFIG, IDAC_CTRL_EN, and IDAC_CURPROG_RANGESEL_RANGE0.

void IDAC_StepSet ( IDAC_TypeDef idac,
const uint32_t  step 
)

Set the current step of the IDAC output.

Parameters
[in]idacPointer to IDAC peripheral register block.
[in]stepStep value for IDAC output. Valid range is 0-31.

Definition at line 323 of file em_idac.c.

References _IDAC_CURPROG_STEPSEL_MASK, _IDAC_CURPROG_STEPSEL_SHIFT, and IDAC_TypeDef::CURPROG.