See Quickstart guide for SAM AFEC driver.

Driver for the Analog-Front-End Controller. This driver provides access to the main features of the AFEC controller.

Macros
#define	AFEC_INTERRUPT_GAP2 (1UL)

#define	AFEC_SEQ1_CHANNEL_NUM (8UL)

#define	AFEC_TEMP_INT_SOURCE_NUM (15UL)

#define	NUM_OF_AFEC (1UL)

Functions
void	AFEC0_Handler (void)
	Interrupt handler for AFEC0. More...

void	AFEC1_Handler (void)
	Interrupt handler for AFEC1. More...

void	afec_ch_get_config_defaults (struct afec_ch_config *const cfg)
	Get the AFEC channel default configurations. More...

void	afec_ch_set_config (Afec const afec, const enum afec_channel_num channel, struct afec_ch_config config)
	Configure the AFEC channel. More...

void	afec_configure_sequence (Afec *const afec, const enum afec_channel_num ch_list[], uint8_t uc_num)
	Configure conversion sequence. More...

void	afec_disable (Afec *const afec)
	Disable AFEC Module. More...

void	afec_disable_interrupt (Afec *const afec, enum afec_interrupt_source interrupt_source)
	Disable AFEC interrupts. More...

void	afec_enable (Afec *const afec)
	Enable AFEC Module. More...

void	afec_enable_interrupt (Afec *const afec, enum afec_interrupt_source interrupt_source)
	Enable AFEC interrupts. More...

static uint32_t	afec_find_inst_num (Afec *const afec)
	Get AFEC instance number. More...

static uint32_t	afec_find_pid (Afec *const afec)
	Get AFEC Peripheral ID. More...

void	afec_get_config_defaults (struct afec_config *const cfg)
	Get the AFEC default configurations. More...

enum status_code	afec_init (Afec const afec, struct afec_config config)
	Initialize the AFEC Module. More...

static void	afec_interrupt (uint8_t inst_num, enum afec_interrupt_source source)
	Common AFEC interrupt handler. More...

static void	afec_process_callback (Afec *const afec)
	Call the callback function if the corresponding interrupt is asserted. More...

void	afec_set_callback (Afec *const afec, enum afec_interrupt_source source, afec_callback_t callback, uint8_t irq_level)
	Set callback for AFEC. More...

void	afec_set_comparison_mode (Afec *const afec, const enum afec_cmp_mode mode, const enum afec_channel_num channel, uint8_t cmp_filter)
	Configure comparison mode. More...

static void	afec_set_config (Afec const afec, struct afec_config config)
	Configure the AFEC Module. More...

void	afec_set_power_mode (Afec *const afec, const enum afec_power_mode mode)
	Configure AFEC power mode. More...

void	afec_temp_sensor_get_config_defaults (struct afec_temp_sensor_config *const cfg)
	Get the AFEC Temperature Sensor default configurations. More...

void	afec_temp_sensor_set_config (Afec const afec, struct afec_temp_sensor_config config)
	Configure the AFEC temperature sensor. More...

Variables
afec_callback_t	afec_callback_pointer [NUM_OF_AFEC][_AFEC_NUM_OF_INTERRUPT_SOURCE]

#define AFEC_INTERRUPT_GAP2 (1UL)

Referenced by afec_disable_interrupt(), afec_enable_interrupt(), and afec_process_callback().

#define AFEC_SEQ1_CHANNEL_NUM (8UL)

Referenced by afec_configure_sequence().

#define AFEC_TEMP_INT_SOURCE_NUM (15UL)

Referenced by afec_disable_interrupt(), afec_enable_interrupt(), and afec_process_callback().

#define NUM_OF_AFEC (1UL)

void AFEC0_Handler ( void )

Interrupt handler for AFEC0.

References afec_process_callback().

void AFEC1_Handler ( void )

Interrupt handler for AFEC1.

References afec_process_callback().

void afec_ch_get_config_defaults ( struct afec_ch_config *const cfg )

Get the AFEC channel default configurations.

Use to initialize the configuration structure to known default values.

The default configuration is as follows:

Single Ended Mode
Gain value is 1

Parameters

cfg	Pointer to channel configuration structure to be initiated.

References AFEC_GAINVALUE_1, Assert, afec_ch_config::diff, and afec_ch_config::gain.

void afec_ch_set_config	(	Afec *const	afec,
		const enum afec_channel_num	channel,
		struct afec_ch_config *	config
	)

Configure the AFEC channel.

Parameters

afec	Base address of the AFEC
channel	The channel number
config	Configuration for the AFEC channel

References afec_ch_sanity_check(), afec_ch_config::diff, and afec_ch_config::gain.

void afec_configure_sequence	(	Afec *const	afec,
		const enum afec_channel_num	ch_list[],
		uint8_t	uc_num
	)

Configure conversion sequence.

Parameters

afec	Base address of the AFEC.
ch_list	Channel sequence list.
uc_num	Number of channels in the list.

References AFEC_SEQ1_CHANNEL_NUM.

void afec_disable ( Afec *const afec )

Disable AFEC Module.

Parameters

afec	Base address of the AFEC

References afec_find_pid(), Assert, pmc_disable_periph_clk(), SLEEPMGR_SLEEP_WFI, and sleepmgr_unlock_mode().

void afec_disable_interrupt	(	Afec *const	afec,
		enum afec_interrupt_source	interrupt_source
	)

Disable AFEC interrupts.

Parameters

afec	Base address of the AFEC.
interrupt_source	Interrupts to be disabled.

References AFEC_INTERRUPT_GAP2, and AFEC_TEMP_INT_SOURCE_NUM.

Referenced by afec_set_comp_flag(), and afec_set_data_ready_flag().

void afec_enable ( Afec *const afec )

Enable AFEC Module.

Parameters

afec	Base address of the AFEC

References afec_find_pid(), Assert, pmc_enable_periph_clk(), sleepmgr_lock_mode(), and SLEEPMGR_SLEEP_WFI.

Referenced by main().

void afec_enable_interrupt	(	Afec *const	afec,
		enum afec_interrupt_source	interrupt_source
	)

Enable AFEC interrupts.

Parameters

afec	Base address of the AFEC.
interrupt_source	Interrupts to be enabled.

References AFEC_INTERRUPT_GAP2, and AFEC_TEMP_INT_SOURCE_NUM.

Referenced by afec_set_callback().

static uint32_t afec_find_inst_num ( Afec *const afec )

static

Get AFEC instance number.

Parameters

afec	Base address of the AFEC

Returns: AFEC instance number

Referenced by afec_process_callback(), and afec_set_callback().

static uint32_t afec_find_pid ( Afec *const afec )

static

Get AFEC Peripheral ID.

Parameters

afec	Base address of the AFEC

Returns: AFEC Peripheral ID

Referenced by afec_disable(), and afec_enable().

void afec_get_config_defaults ( struct afec_config *const cfg )

Get the AFEC default configurations.

Use to initialize the configuration structure to known default values. This function should be called at the start of any AFEC initiation.

The default configuration is as follows:

12 -bit resolution
AFEC clock frequency is 6MHz
Start Up Time is 64 periods AFEC clock, for SAMV71 is 24 periods AFEC clock
Analog Settling Time is 3 periods of AFEC clock
Tracking Time is 3 periods of AFEC clock
Transfer Period is 5 periods AFEC clock,for SAMV71 is 7 periods AFEC clock
Allows different analog settings for each channel
The controller converts channels in a simple numeric order
Appends the channel number to the conversion result in AFE_LDCR register
Only a Single Trigger is required to get an averaged value
AFE Bias Current Control value is 1

Parameters

cfg	Pointer to configuration structure to be initiated.

References AFEC_12_BITS, afec_config::afec_clock, AFEC_STARTUP_TIME_4, afec_config::anach, Assert, afec_config::ibctl, afec_config::mck, afec_config::resolution, afec_config::startup_time, afec_config::stm, sysclk_get_cpu_hz(), afec_config::tag, afec_config::tracktim, afec_config::transfer, and afec_config::useq.

Referenced by main().

enum status_code afec_init	(	Afec *const	afec,
		struct afec_config *	config
	)

Initialize the AFEC Module.

Parameters

afec	Base address of the AFEC
config	Configuration for the AFEC

Return values

STATUS_OK	Initialization is finished.
STATUS_ERR_BUSY	Initialization failed.

References afec_callback_pointer, afec_get_interrupt_status(), afec_set_config(), Assert, STATUS_ERR_BUSY, and STATUS_OK.

Referenced by main().

static void afec_interrupt	(	uint8_t	inst_num,
		enum afec_interrupt_source	source
	)

static

Common AFEC interrupt handler.

The optional callback used by the interrupt handler is set by the afec_set_callback() function.

Parameters

inst_num	AFEC instance number to handle interrupt for
source	Interrupt source number

References afec_callback_pointer.

Referenced by afec_process_callback().

static void afec_process_callback ( Afec *const afec )

static

Call the callback function if the corresponding interrupt is asserted.

Parameters

afec	Base address of the AFEC.

References afec_find_inst_num(), afec_get_interrupt_mask(), afec_get_interrupt_status(), afec_interrupt(), AFEC_INTERRUPT_GAP2, and AFEC_TEMP_INT_SOURCE_NUM.

Referenced by AFEC0_Handler(), and AFEC1_Handler().

void afec_set_callback	(	Afec *const	afec,
		enum afec_interrupt_source	source,
		afec_callback_t	callback,
		uint8_t	irq_level
	)

Set callback for AFEC.

Parameters

afec	Base address of the AFEC
source	Interrupt source
callback	Callback function pointer
irq_level	Interrupt level

References afec_callback_pointer, afec_enable_interrupt(), afec_find_inst_num(), Assert, and irq_register_handler.

Referenced by run_afec_comp_test(), and run_afec_tc_trig_test().

void afec_set_comparison_mode	(	Afec *const	afec,
		const enum afec_cmp_mode	mode,
		const enum afec_channel_num	channel,
		uint8_t	cmp_filter
	)

Configure comparison mode.

Parameters

afec	Base address of the AFEC.
mode	Comparison mode.
channel	Comparison Selected Channel.
cmp_filter	Compare Event Filtering.

References afec_ch_sanity_check().

Referenced by run_afec_comp_test().

static void afec_set_config	(	Afec *const	afec,
		struct afec_config *	config
	)

static

Configure the AFEC Module.

Parameters

afec	Base address of the AFEC
config	Configuration for the AFEC

References afec_config::afec_clock, afec_config::anach, afec_config::ibctl, afec_config::mck, afec_config::resolution, SAME70, SAMS70, SAMV70, SAMV71, afec_config::startup_time, afec_config::stm, afec_config::tag, afec_config::tracktim, afec_config::transfer, and afec_config::useq.

Referenced by afec_init().

void afec_set_power_mode	(	Afec *const	afec,
		const enum afec_power_mode	mode
	)

Configure AFEC power mode.

Parameters

afec	Base address of the AFEC.
mode	AFEC power mode value.

References AFEC_POWER_MODE_0, AFEC_POWER_MODE_1, and AFEC_POWER_MODE_2.

void afec_temp_sensor_get_config_defaults ( struct afec_temp_sensor_config *const cfg )

Get the AFEC Temperature Sensor default configurations.

Use to initialize the configuration structure to known default values.

The default configuration is as follows:

The temperature sensor measure is not triggered by RTC event
Generates an event when the converted data is in the comparison window
The window range is 0xFF ~ 0xFFF

Parameters

cfg	Pointer to temperature sensor configuration structure to be initiated.

References AFEC_TEMP_CMP_MODE_2, Assert, afec_temp_sensor_config::high_threshold, afec_temp_sensor_config::low_threshold, afec_temp_sensor_config::mode, and afec_temp_sensor_config::rctc.

void afec_temp_sensor_set_config	(	Afec *const	afec,
		struct afec_temp_sensor_config *	config
	)

Configure the AFEC temperature sensor.

Parameters

afec	Base address of the AFEC
config	Configuration for the AFEC temperature sensor

References Assert, afec_temp_sensor_config::high_threshold, afec_temp_sensor_config::low_threshold, afec_temp_sensor_config::mode, and afec_temp_sensor_config::rctc.

afec_callback_t afec_callback_pointer[NUM_OF_AFEC][_AFEC_NUM_OF_INTERRUPT_SOURCE]

Referenced by afec_init(), afec_interrupt(), and afec_set_callback().

Microchip® Advanced Software Framework

Macros

Functions

Variables