ACMP - Analog Comparator#

Analog comparator (ACMP) Peripheral API.

The Analog Comparator is used to compare voltage of two analog inputs with a digital output indicating which input voltage is higher. Inputs can either be one of the selectable internal references or from external pins. Response time and current consumption can be configured by altering the current supply to the comparator.

ACMP is available down to EM3 and is able to wake up the system when input signals pass a certain threshold. Use ACMP_IntEnable() to enable an edge interrupt to use this functionality.

This example shows how to use the em_acmp.h API for comparing an input pin to an internal 2.5 V reference voltage.

/* Initialize with default settings. */
ACMP_Init_TypeDef init = ACMP_INIT_DEFAULT;
ACMP_Init(ACMP0, &init);

/* In this example we want to compare an analog input to the 2.5 V
 * internal reference. The default settings resets the divider for
 * acmpInputVREFDIV2V5, which we can use as a 2.5 V reference. */

/* Now we select the two inputs to compare. Here we compare the acmpInputPD2
 * input to the internal 2.5V reference. When acmpInputPD2 is lower than
 * 2.5 V then the ACMP output is 0 and when acmpInputPD2 is is higher than
 * 2.5 V then the ACMP output is 1. */
ACMP_ChannelSet(ACMP0, acmpInputVREFDIV2V5, acmpInputPD2);

/* Allocate CDEVEN0 to ACMP0 to be able to use the input. */
GPIO->CDBUSALLOC = GPIO_CDBUSALLOC_CDEVEN0_ACMP0;

/* To be able to probe the output we can send the ACMP output to a pin.
 * The second argument to this function is the pin location which is
 * device dependent. */
ACMP_GPIOSetup(ACMP0, gpioPortD, 1, true, false);

Note

ACMP can also be used to compare two separate input pins.

ACMP also contains specialized hardware for capacitive sensing. This module contains the ACMP_CapsenseInit() function to initialize ACMP for capacitive sensing and the ACMP_CapsenseChannelSet() function to select the current capsense channel.

For applications that require capacitive sensing it is recommended to use a library, such as cslib, which is provided by Silicon Labs.

Modules#

ACMP_CapsenseInit_TypeDef

ACMP_Init_TypeDef

Enumerations#

enum

ACMP_CapsenseResistor_TypeDef {

acmpResistor0 = _ACMP_INPUTCTRL_CSRESSEL_RES0

acmpResistor1 = _ACMP_INPUTCTRL_CSRESSEL_RES1

acmpResistor2 = _ACMP_INPUTCTRL_CSRESSEL_RES2

acmpResistor3 = _ACMP_INPUTCTRL_CSRESSEL_RES3

acmpResistor4 = _ACMP_INPUTCTRL_CSRESSEL_RES4

acmpResistor5 = _ACMP_INPUTCTRL_CSRESSEL_RES5

acmpResistor6 = _ACMP_INPUTCTRL_CSRESSEL_RES6

}

Resistor values used for the internal capacitive sense resistor.

enum

ACMP_HysteresisLevel_TypeDef {

acmpHysteresisDisabled = _ACMP_CFG_HYST_DISABLED

acmpHysteresis10Sym = _ACMP_CFG_HYST_SYM10MV

acmpHysteresis20Sym = _ACMP_CFG_HYST_SYM20MV

acmpHysteresis30Sym = _ACMP_CFG_HYST_SYM30MV

acmpHysteresis10Pos = _ACMP_CFG_HYST_POS10MV

acmpHysteresis20Pos = _ACMP_CFG_HYST_POS20MV

acmpHysteresis30Pos = _ACMP_CFG_HYST_POS30MV

acmpHysteresis10Neg = _ACMP_CFG_HYST_NEG10MV

acmpHysteresis20Neg = _ACMP_CFG_HYST_NEG20MV

acmpHysteresis30Neg = _ACMP_CFG_HYST_NEG30MV

}

Hysteresis level.

enum

ACMP_InputRange_TypeDef {

acmpInputRangeFull = _ACMP_CFG_INPUTRANGE_FULL

acmpInputRangeReduced = _ACMP_CFG_INPUTRANGE_REDUCED

}

Adjust ACMP performance for a given input voltage range.

enum

ACMP_Accuracy_TypeDef {

acmpAccuracyLow = _ACMP_CFG_ACCURACY_LOW

acmpAccuracyHigh = _ACMP_CFG_ACCURACY_HIGH

}

ACMP accuracy mode.

enum

ACMP_Channel_TypeDef {

acmpInputVSS = _ACMP_INPUTCTRL_POSSEL_VSS

acmpInputVREFDIVAVDD = _ACMP_INPUTCTRL_POSSEL_VREFDIVAVDD

acmpInputVREFDIVAVDDLP = _ACMP_INPUTCTRL_POSSEL_VREFDIVAVDDLP

acmpInputVREFDIV1V25 = _ACMP_INPUTCTRL_POSSEL_VREFDIV1V25

acmpInputVREFDIV1V25LP = _ACMP_INPUTCTRL_POSSEL_VREFDIV1V25LP

acmpInputVREFDIV2V5 = _ACMP_INPUTCTRL_POSSEL_VREFDIV2V5

acmpInputVREFDIV2V5LP = _ACMP_INPUTCTRL_POSSEL_VREFDIV2V5LP

acmpInputVSENSE01DIV4 = _ACMP_INPUTCTRL_POSSEL_VSENSE01DIV4

acmpInputVSENSE01DIV4LP = _ACMP_INPUTCTRL_POSSEL_VSENSE01DIV4LP

acmpInputVSENSE11DIV4 = _ACMP_INPUTCTRL_POSSEL_VSENSE11DIV4

acmpInputVSENSE11DIV4LP = _ACMP_INPUTCTRL_POSSEL_VSENSE11DIV4LP

acmpInputCAPSENSE = _ACMP_INPUTCTRL_NEGSEL_CAPSENSE

acmpInputPA0 = _ACMP_INPUTCTRL_POSSEL_PA0

acmpInputPA1 = _ACMP_INPUTCTRL_POSSEL_PA1

acmpInputPA2 = _ACMP_INPUTCTRL_POSSEL_PA2

acmpInputPA3 = _ACMP_INPUTCTRL_POSSEL_PA3

acmpInputPA4 = _ACMP_INPUTCTRL_POSSEL_PA4

acmpInputPA5 = _ACMP_INPUTCTRL_POSSEL_PA5

acmpInputPA6 = _ACMP_INPUTCTRL_POSSEL_PA6

acmpInputPA7 = _ACMP_INPUTCTRL_POSSEL_PA7

acmpInputPA8 = _ACMP_INPUTCTRL_POSSEL_PA8

acmpInputPA9 = _ACMP_INPUTCTRL_POSSEL_PA9

acmpInputPA10 = _ACMP_INPUTCTRL_POSSEL_PA10

acmpInputPA11 = _ACMP_INPUTCTRL_POSSEL_PA11

acmpInputPA12 = _ACMP_INPUTCTRL_POSSEL_PA12

acmpInputPA13 = _ACMP_INPUTCTRL_POSSEL_PA13

acmpInputPA14 = _ACMP_INPUTCTRL_POSSEL_PA14

acmpInputPA15 = _ACMP_INPUTCTRL_POSSEL_PA15

acmpInputPB0 = _ACMP_INPUTCTRL_POSSEL_PB0

acmpInputPB1 = _ACMP_INPUTCTRL_POSSEL_PB1

acmpInputPB2 = _ACMP_INPUTCTRL_POSSEL_PB2

acmpInputPB3 = _ACMP_INPUTCTRL_POSSEL_PB3

acmpInputPB4 = _ACMP_INPUTCTRL_POSSEL_PB4

acmpInputPB5 = _ACMP_INPUTCTRL_POSSEL_PB5

acmpInputPB6 = _ACMP_INPUTCTRL_POSSEL_PB6

acmpInputPB7 = _ACMP_INPUTCTRL_POSSEL_PB7

acmpInputPB8 = _ACMP_INPUTCTRL_POSSEL_PB8

acmpInputPB9 = _ACMP_INPUTCTRL_POSSEL_PB9

acmpInputPB10 = _ACMP_INPUTCTRL_POSSEL_PB10

acmpInputPB11 = _ACMP_INPUTCTRL_POSSEL_PB11

acmpInputPB12 = _ACMP_INPUTCTRL_POSSEL_PB12

acmpInputPB13 = _ACMP_INPUTCTRL_POSSEL_PB13

acmpInputPB14 = _ACMP_INPUTCTRL_POSSEL_PB14

acmpInputPB15 = _ACMP_INPUTCTRL_POSSEL_PB15

acmpInputPC0 = _ACMP_INPUTCTRL_POSSEL_PC0

acmpInputPC1 = _ACMP_INPUTCTRL_POSSEL_PC1

acmpInputPC2 = _ACMP_INPUTCTRL_POSSEL_PC2

acmpInputPC3 = _ACMP_INPUTCTRL_POSSEL_PC3

acmpInputPC4 = _ACMP_INPUTCTRL_POSSEL_PC4

acmpInputPC5 = _ACMP_INPUTCTRL_POSSEL_PC5

acmpInputPC6 = _ACMP_INPUTCTRL_POSSEL_PC6

acmpInputPC7 = _ACMP_INPUTCTRL_POSSEL_PC7

acmpInputPC8 = _ACMP_INPUTCTRL_POSSEL_PC8

acmpInputPC9 = _ACMP_INPUTCTRL_POSSEL_PC9

acmpInputPC10 = _ACMP_INPUTCTRL_POSSEL_PC10

acmpInputPC11 = _ACMP_INPUTCTRL_POSSEL_PC11

acmpInputPC12 = _ACMP_INPUTCTRL_POSSEL_PC12

acmpInputPC13 = _ACMP_INPUTCTRL_POSSEL_PC13

acmpInputPC14 = _ACMP_INPUTCTRL_POSSEL_PC14

acmpInputPC15 = _ACMP_INPUTCTRL_POSSEL_PC15

acmpInputPD0 = _ACMP_INPUTCTRL_POSSEL_PD0

acmpInputPD1 = _ACMP_INPUTCTRL_POSSEL_PD1

acmpInputPD2 = _ACMP_INPUTCTRL_POSSEL_PD2

acmpInputPD3 = _ACMP_INPUTCTRL_POSSEL_PD3

acmpInputPD4 = _ACMP_INPUTCTRL_POSSEL_PD4

acmpInputPD5 = _ACMP_INPUTCTRL_POSSEL_PD5

acmpInputPD6 = _ACMP_INPUTCTRL_POSSEL_PD6

acmpInputPD7 = _ACMP_INPUTCTRL_POSSEL_PD7

acmpInputPD8 = _ACMP_INPUTCTRL_POSSEL_PD8

acmpInputPD9 = _ACMP_INPUTCTRL_POSSEL_PD9

acmpInputPD10 = _ACMP_INPUTCTRL_POSSEL_PD10

acmpInputPD11 = _ACMP_INPUTCTRL_POSSEL_PD11

acmpInputPD12 = _ACMP_INPUTCTRL_POSSEL_PD12

acmpInputPD13 = _ACMP_INPUTCTRL_POSSEL_PD13

acmpInputPD14 = _ACMP_INPUTCTRL_POSSEL_PD14

acmpInputPD15 = _ACMP_INPUTCTRL_POSSEL_PD15

}

ACMP Input Selection.

Functions#

void

ACMP_CapsenseInit(ACMP_TypeDef *acmp, const ACMP_CapsenseInit_TypeDef *init)

Set up ACMP for use in capacitive sense applications.

void

ACMP_CapsenseChannelSet(ACMP_TypeDef *acmp, ACMP_Channel_TypeDef channel)

Set the ACMP channel used for capacitive sensing.

void

ACMP_Disable(ACMP_TypeDef *acmp)

Disable ACMP.

void

ACMP_Enable(ACMP_TypeDef *acmp)

Enable ACMP.

void

ACMP_Reset(ACMP_TypeDef *acmp)

Reset ACMP to the same state that it was in after a hardware reset.

void

ACMP_GPIOSetup(ACMP_TypeDef *acmp, GPIO_Port_TypeDef port, unsigned int pin, bool enable, bool invert)

Sets up GPIO output from the ACMP.

void

ACMP_ChannelSet(ACMP_TypeDef *acmp, ACMP_Channel_TypeDef negSel, ACMP_Channel_TypeDef posSel)

Set which channels should be used in ACMP comparisons.

void

ACMP_Init(ACMP_TypeDef *acmp, const ACMP_Init_TypeDef *init)

Initialize ACMP.

void

ACMP_IntClear(ACMP_TypeDef *acmp, uint32_t flags)

Clear one or more pending ACMP interrupts.

void

ACMP_IntDisable(ACMP_TypeDef *acmp, uint32_t flags)

Disable one or more ACMP interrupts.

void

ACMP_IntEnable(ACMP_TypeDef *acmp, uint32_t flags)

Enable one or more ACMP interrupts.

uint32_t

ACMP_IntGet(ACMP_TypeDef *acmp)

Get pending ACMP interrupt flags.

uint32_t

ACMP_IntGetEnabled(ACMP_TypeDef *acmp)

Get enabled and pending ACMP interrupt flags.

void

ACMP_IntSet(ACMP_TypeDef *acmp, uint32_t flags)

Set one or more pending ACMP interrupts from software.

ACMP_Channel_TypeDef

ACMP_PortPinToInput(GPIO_Port_TypeDef port, uint8_t pin)

Convert GPIO port/pin to ACMP input selection.

Macros#

#define

PM5507_ACMP_CFG_BIAS_DEFAULT 0x00000004UL

A default configuration for capacitive sense mode initialization.

#define

PM5507_ACMP_CFG_RESETVALUE 0x00000004UL

Analog comparator reset value.

#define

ACMP_CAPSENSE_INIT_DEFAULT undefined

Capacitive sense mode configuration default values.

#define

ACMP_INIT_DEFAULT undefined

Default configuration for ACMP regular initialization.

Enumeration Documentation#

ACMP_CapsenseResistor_TypeDef#

ACMP_CapsenseResistor_TypeDef

Resistor values used for the internal capacitive sense resistor.

See data sheet for your device for details on each resistor value.

Enumerator
acmpResistor0	Resistor value 0.
acmpResistor1	Resistor value 1.
acmpResistor2	Resistor value 2.
acmpResistor3	Resistor value 3.
acmpResistor4	Resistor value 4.
acmpResistor5	Resistor value 5.
acmpResistor6	Resistor value 6.

ACMP_HysteresisLevel_TypeDef#

ACMP_HysteresisLevel_TypeDef

Hysteresis level.

See data sheet for your device for details on each level.

Enumerator
acmpHysteresisDisabled	Mode DISABLED for ACMP_CFG.
acmpHysteresis10Sym	Mode HYST10SYM for ACMP_CFG.
acmpHysteresis20Sym	Mode HYST20SYM for ACMP_CFG.
acmpHysteresis30Sym	Mode HYST30SYM for ACMP_CFG.
acmpHysteresis10Pos	Mode HYST10POS for ACMP_CFG.
acmpHysteresis20Pos	Mode HYST20POS for ACMP_CFG.
acmpHysteresis30Pos	Mode HYST30POS for ACMP_CFG.
acmpHysteresis10Neg	Mode HYST10NEG for ACMP_CFG.
acmpHysteresis20Neg	Mode HYST20NEG for ACMP_CFG.
acmpHysteresis30Neg	Mode HYST30NEG for ACMP_CFG.

ACMP_InputRange_TypeDef#

ACMP_InputRange_TypeDef

Adjust ACMP performance for a given input voltage range.

Enumerator
acmpInputRangeFull	Input can be from 0 to VDD.
acmpInputRangeReduced	Input can be from 0 to VDD-0.7 V.

ACMP_Accuracy_TypeDef#

ACMP_Accuracy_TypeDef

ACMP accuracy mode.

Enumerator
acmpAccuracyLow	Low-accuracy mode which consumes less current.
acmpAccuracyHigh	High-accuracy mode which consumes more current.

ACMP_Channel_TypeDef#

ACMP_Channel_TypeDef

ACMP Input Selection.

Enumerator
acmpInputVSS	Select VSS.
acmpInputVREFDIVAVDD	Select Divided AVDD.
acmpInputVREFDIVAVDDLP	Select Low-Power Divided AVDD.
acmpInputVREFDIV1V25	Select Divided 1V25 reference.
acmpInputVREFDIV1V25LP	Select Low-power Divided 1V25 reference.
acmpInputVREFDIV2V5	Select Divided 2V5 reference.
acmpInputVREFDIV2V5LP	Select Low-power Divided 2V5 reference.
acmpInputVSENSE01DIV4	Select VSENSE0 divided by 4.
acmpInputVSENSE01DIV4LP	Select Low-power VSENSE0 divided by 4.
acmpInputVSENSE11DIV4	VSENSE1 divided by 4.
acmpInputVSENSE11DIV4LP	Low-power VSENSE1 divided by 4.
acmpInputCAPSENSE	Select Low-Power Divided AVDD.
acmpInputPA0	Select Port A Pin0.
acmpInputPA1	Select Port A Pin1.
acmpInputPA2	Select Port A Pin2.
acmpInputPA3	Select Port A Pin3.
acmpInputPA4	Select Port A Pin4.
acmpInputPA5	Select Port A Pin5.
acmpInputPA6	Select Port A Pin6.
acmpInputPA7	Select Port A Pin7.
acmpInputPA8	Select Port A Pin8.
acmpInputPA9	Select Port A Pin9.
acmpInputPA10	Select Port A Pin10.
acmpInputPA11	Select Port A Pin11.
acmpInputPA12	Select Port A Pin12.
acmpInputPA13	Select Port A Pin13.
acmpInputPA14	Select Port A Pin14.
acmpInputPA15	Select Port A Pin15.
acmpInputPB0	Select Port B Pin0.
acmpInputPB1	Select Port B Pin1.
acmpInputPB2	Select Port B Pin2.
acmpInputPB3	Select Port B Pin3.
acmpInputPB4	Select Port B Pin4.
acmpInputPB5	Select Port B Pin5.
acmpInputPB6	Select Port B Pin6.
acmpInputPB7	Select Port B Pin7.
acmpInputPB8	Select Port B Pin8.
acmpInputPB9	Select Port B Pin9.
acmpInputPB10	Select Port B Pin10.
acmpInputPB11	Select Port B Pin11.
acmpInputPB12	Select Port B Pin12.
acmpInputPB13	Select Port B Pin13.
acmpInputPB14	Select Port B Pin14.
acmpInputPB15	Select Port B Pin15.
acmpInputPC0	Select Port C Pin0.
acmpInputPC1	Select Port C Pin1.
acmpInputPC2	Select Port C Pin2.
acmpInputPC3	Select Port C Pin3.
acmpInputPC4	Select Port C Pin4.
acmpInputPC5	Select Port C Pin5.
acmpInputPC6	Select Port C Pin6.
acmpInputPC7	Select Port C Pin7.
acmpInputPC8	Select Port C Pin8.
acmpInputPC9	Select Port C Pin9.
acmpInputPC10	Select Port C Pin10.
acmpInputPC11	Select Port C Pin11.
acmpInputPC12	Select Port C Pin12.
acmpInputPC13	Select Port C Pin13.
acmpInputPC14	Select Port C Pin14.
acmpInputPC15	Select Port C Pin15.
acmpInputPD0	Select Port D Pin0.
acmpInputPD1	Select Port D Pin1.
acmpInputPD2	Select Port D Pin2.
acmpInputPD3	Select Port D Pin3.
acmpInputPD4	Select Port D Pin4.
acmpInputPD5	Select Port D Pin5.
acmpInputPD6	Select Port D Pin6.
acmpInputPD7	Select Port D Pin7.
acmpInputPD8	Select Port D Pin8.
acmpInputPD9	Select Port D Pin9.
acmpInputPD10	Select Port D Pin10.
acmpInputPD11	Select Port D Pin11.
acmpInputPD12	Select Port D Pin12.
acmpInputPD13	Select Port D Pin13.
acmpInputPD14	Select Port D Pin14.
acmpInputPD15	Select Port D Pin15.

Function Documentation#

ACMP_CapsenseInit#

void ACMP_CapsenseInit (ACMP_TypeDef * acmp, const ACMP_CapsenseInit_TypeDef * init)

Set up ACMP for use in capacitive sense applications.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
const ACMP_CapsenseInit_TypeDef *	[in]	init	A pointer to the initialization structure used to configure ACMP for capacitive sensing operation.

This function sets up ACMP for use in capacitive sense applications. To use the capacitive sense functionality in the ACMP, use the PRS output of the ACMP module to count the number of oscillations in the capacitive sense circuit (possibly using a TIMER).

Note

A basic example of capacitive sensing can be found in the STK BSP (capsense demo).
A call to ACMP_CapsenseInit will enable and disable the ACMP peripheral, which can cause side effects if it was previously set up.

ACMP_CapsenseChannelSet#

void ACMP_CapsenseChannelSet (ACMP_TypeDef * acmp, ACMP_Channel_TypeDef channel)

Set the ACMP channel used for capacitive sensing.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
ACMP_Channel_TypeDef	[in]	channel	The ACMP channel to use for capacitive sensing (Possel).

Note

A basic example of capacitive sensing can be found in the STK BSP (capsense demo).
Can only be called when the peripheral is enabled.

ACMP_Disable#

void ACMP_Disable (ACMP_TypeDef * acmp)

Disable ACMP.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.

ACMP_Enable#

void ACMP_Enable (ACMP_TypeDef * acmp)

Enable ACMP.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.

ACMP_Reset#

void ACMP_Reset (ACMP_TypeDef * acmp)

Reset ACMP to the same state that it was in after a hardware reset.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.

Note

The GPIO ACMP ROUTE register is NOT reset by this function to allow for centralized setup of this feature.
The peripheral may be enabled and disabled during reset.

ACMP_GPIOSetup#

void ACMP_GPIOSetup (ACMP_TypeDef * acmp, GPIO_Port_TypeDef port, unsigned int pin, bool enable, bool invert)

Sets up GPIO output from the ACMP.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	Pointer to the ACMP peripheral register block.
GPIO_Port_TypeDef	N/A	port	The GPIO port to use.
unsigned int	N/A	pin	The GPIO pin to use.
bool	N/A	enable	Enable or disable pin output.
bool	N/A	invert	Invert output.

Note

GPIO must be enabled in the CMU before this function call, i.e.
```
CMU_ClockEnable(cmuClock_GPIO, true); 
```

ACMP_ChannelSet#

void ACMP_ChannelSet (ACMP_TypeDef * acmp, ACMP_Channel_TypeDef negSel, ACMP_Channel_TypeDef posSel)

Set which channels should be used in ACMP comparisons.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
ACMP_Channel_TypeDef	N/A	negSel	A channel to use on the negative input to the ACMP.
ACMP_Channel_TypeDef	N/A	posSel	A channel to use on the positive input to the ACMP.

Note

Can only be called when the peripheral is enabled.
If GPIO is used for both posSel and negSel, they cannot both use even or odd pins.

ACMP_Init#

void ACMP_Init (ACMP_TypeDef * acmp, const ACMP_Init_TypeDef * init)

Initialize ACMP.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
const ACMP_Init_TypeDef *	[in]	init	A pointer to the initialization structure used to configure ACMP.

Note

A call to ACMP_Init can cause side effects since it can enable/disable the peripheral.

ACMP_IntClear#

void ACMP_IntClear (ACMP_TypeDef * acmp, uint32_t flags)

Clear one or more pending ACMP interrupts.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
uint32_t	[in]	flags	Pending ACMP interrupt source to clear. Use a bitwise logic OR combination of valid interrupt flags for the ACMP module. The flags can be, for instance, ACMP_IFC_EDGE or ACMP_IFC_WARMUP.

ACMP_IntDisable#

void ACMP_IntDisable (ACMP_TypeDef * acmp, uint32_t flags)

Disable one or more ACMP interrupts.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
uint32_t	[in]	flags	ACMP interrupt sources to disable. Use a bitwise logic OR combination of valid interrupt flags for the ACMP module. The flags can be, for instance, ACMP_IEN_EDGE or ACMP_IEN_WARMUP.

ACMP_IntEnable#

void ACMP_IntEnable (ACMP_TypeDef * acmp, uint32_t flags)

Enable one or more ACMP interrupts.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
uint32_t	[in]	flags	ACMP interrupt sources to enable. Use a bitwise logic OR combination of valid interrupt flags for the ACMP module. The flags can be, for instance, ACMP_IEN_EDGE or ACMP_IEN_WARMUP.

Note

Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. Consider using ACMP_IntClear() prior to enabling if a pending interrupt should be ignored.

ACMP_IntGet#

uint32_t ACMP_IntGet (ACMP_TypeDef * acmp)

Get pending ACMP interrupt flags.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.

Note

This function does not clear event bits.

Returns

Pending ACMP interrupt sources. A bitwise logic OR combination of valid interrupt flags for the ACMP module. The pending interrupt sources can be, for instance, ACMP_IF_EDGE or ACMP_IF_WARMUP.

ACMP_IntGetEnabled#

uint32_t ACMP_IntGetEnabled (ACMP_TypeDef * acmp)

Get enabled and pending ACMP interrupt flags.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.

Useful for handling more interrupt sources in the same interrupt handler.

Note

This function does not clear interrupt flags.

Returns

Pending and enabled ACMP interrupt sources. The return value is the bitwise AND combination of
- the OR combination of enabled interrupt sources in ACMPx_IEN_nnn register (ACMPx_IEN_nnn) and
- the OR combination of valid interrupt flags of the ACMP module (ACMPx_IF_nnn).

ACMP_IntSet#

void ACMP_IntSet (ACMP_TypeDef * acmp, uint32_t flags)

Set one or more pending ACMP interrupts from software.

Parameters

Type	Direction	Argument Name	Description
ACMP_TypeDef *	[in]	acmp	A pointer to the ACMP peripheral register block.
uint32_t	[in]	flags	ACMP interrupt sources to set as pending. Use a bitwise logic OR combination of valid interrupt flags for the ACMP module. The flags can be, for instance, ACMP_IFS_EDGE or ACMP_IFS_WARMUP.

ACMP_PortPinToInput#

ACMP_Channel_TypeDef ACMP_PortPinToInput (GPIO_Port_TypeDef port, uint8_t pin)

Convert GPIO port/pin to ACMP input selection.

Parameters

Type	Direction	Argument Name	Description
GPIO_Port_TypeDef	[in]	port	GPIO port
uint8_t	[in]	pin	GPIO pin

Returns

ACMP input selection