Example to illustrate the Sleepwalking feature with the ACIFB module in AT32UC3L series.

#include <stdint.h>
#include "compiler.h"
#include "board.h"
#include "conf_example.h"
#include "acifb.h"
#include "gpio.h"
#include "ast.h"
#include "pm_uc3l.h"
#include "scif_uc3l.h"
#include "intc.h"
#include "sysclk.h"
#include "sleepmgr.h"
#include "delay.h"
#include "status_codes.h"

Macros
APPLICATION SPECIFIC CONFIGURATION
#define	DEBUG_MESSAGES DISABLE
	Enable Trace messages through USART terminal. More...

#define	STATUS_LED LED1_GPIO
	LED1_GPIO is used as status LED. More...

#define	ERROR_LED LED0_GPIO
	LED0_GPIO is used as error status LED. More...

#define	LED_DELAY 10
	Delay in ms for LED blinking. More...

#define	POWER_SUPPLY_MODE_1_8V false
	Enable when operated in 1.8V VDDIN. More...

#define	AC &AVR32_ACIFB
	ACIFB Module is used. More...

#define	AC_INTERRUPT_PRIORITY 1
	ACIFB interrupt priority is set to 1. More...

#define	AC_GCLK_ID AVR32_SCIF_GCLK_ACIFB
	ACIFB Generic Clock - GCLK4. More...

#define	AC_GCLK_SRC SCIF_GCCTRL_PBACLOCK
	ACIFB Generic Clock Source - PBA. More...

#define	AC_GCLK_FREQUENCY 250000
	ACIFB Generic Clock Frequency - 1 MHz. More...

#define	AC_STARTUP_CYCLES 6
	ACIFB startup cycle - 6 cycles. More...

#define	AC_NB_CHANNELS 1

#define	AST_CLOCK_SOURCE AST_OSC_32KHZ
	32KHz external oscillator is used as AST source More...

#define	AST_PRESCALER AST_PSEL_32KHZ_1HZ
	Prescaler is set to AST_PSEL_32KHZ_1HZ to run at 1Hz. More...

#define	AST_TRIGGER_PRESCALER 13
	Periodic interrupt prescaler is set to 12 for trigger in every 250ms. More...

#define	NB_GPIO_USED_PINS 6

Functions
static status_code_t	ac_init (void)
	Initializes the ACIFB module with trigger. More...

static status_code_t	ast_init (void)
	Initialize Asynchronous Timer to trigger ACIFB module at regular intervals. More...

	ISR (ACIFB_interrupt_handler, AVR32_ACIFB_IRQ_GROUP, AC_INTERRUPT_PRIORITY)
	ACIFB ISR Routine. More...

int	main (void)
	Main Application Routine. More...

static void	power_save_measures_init (void)
	Initializes the power saving measures to reduce power consumption. More...

Variables
volatile avr32_acifb_t *	acifb = AC
	Global variable to Store the ACIFB module address. More...

uint32_t	gpio_used_pins [NB_GPIO_USED_PINS]
	Array to hold the used GPIO pins. More...

#define AC &AVR32_ACIFB

ACIFB Module is used.

#define AC_GCLK_FREQUENCY 250000

ACIFB Generic Clock Frequency - 1 MHz.

Referenced by ac_init().

#define AC_GCLK_ID AVR32_SCIF_GCLK_ACIFB

ACIFB Generic Clock - GCLK4.

Referenced by ac_init().

#define AC_GCLK_SRC SCIF_GCCTRL_PBACLOCK

ACIFB Generic Clock Source - PBA.

Referenced by ac_init().

#define AC_INTERRUPT_PRIORITY 1

ACIFB interrupt priority is set to 1.

Referenced by ac_init().

#define AC_NB_CHANNELS 1

Referenced by ac_init().

#define AC_STARTUP_CYCLES 6

ACIFB startup cycle - 6 cycles.

#define AST_CLOCK_SOURCE AST_OSC_32KHZ

32KHz external oscillator is used as AST source

Referenced by ast_init().

#define AST_PRESCALER AST_PSEL_32KHZ_1HZ

Prescaler is set to AST_PSEL_32KHZ_1HZ to run at 1Hz.

Referenced by ast_init().

#define AST_TRIGGER_PRESCALER 13

Periodic interrupt prescaler is set to 12 for trigger in every 250ms.

Referenced by ast_init().

#define DEBUG_MESSAGES DISABLE

Enable Trace messages through USART terminal.

#define ERROR_LED LED0_GPIO

LED0_GPIO is used as error status LED.

Referenced by main().

#define LED_DELAY 10

Delay in ms for LED blinking.

Referenced by main().

#define NB_GPIO_USED_PINS 6

#define POWER_SUPPLY_MODE_1_8V false

Enable when operated in 1.8V VDDIN.

#define STATUS_LED LED1_GPIO

LED1_GPIO is used as status LED.

Referenced by main().

static status_code_t ac_init ( )

static

Initializes the ACIFB module with trigger.

Start the GCLK for ACIFB
Initialize the trigger mode & compare interrupts for ACIFB

Return values

STATUS_OK	Configuration OK
ERR_TIMEOUT	Timeout on configuring ACIFB module
ERR_BUSY	ACIFB module unable to configure the trigger

References AC_GCLK_FREQUENCY, AC_GCLK_ID, AC_GCLK_SRC, AC_INTERRUPT_PRIORITY, AC_NB_CHANNELS, acifb, acifb_channels_setup(), acifb_enable_comparison_interrupt(), acifb_setup_and_enable(), cpu_irq_disable, cpu_irq_enable, EXAMPLE_ACIFB_CHANNEL, EXAMPLE_ACIFBN_FUNCTION, EXAMPLE_ACIFBN_PIN, EXAMPLE_ACIFBP_FUNCTION, EXAMPLE_ACIFBP_PIN, acifb_channel_t::filter_len, gpio_disable_pin_pull_up(), gpio_enable_module(), irq_initialize_vectors, irq_register_handler, scif_gc_enable(), scif_gc_setup(), STATUS_OK, acifb_t::sut, SYSCLK_ACIFB, sysclk_enable_pba_module(), and sysclk_get_pba_hz().

Referenced by main().

static status_code_t ast_init ( )

static

Initialize Asynchronous Timer to trigger ACIFB module at regular intervals.

Asynchronous Timer Initialization.

Start the 32KHz Oscillator
Initializes the AST module with periodic trigger events

Return values

STATUS_OK	Configuration OK
ERR_BUSY	Error in configuring the AST module

References ast_clear_all_status_flags(), AST_CLOCK_SOURCE, ast_enable(), ast_enable_periodic0(), ast_init_counter(), AST_PRESCALER, ast_set_periodic0_value(), AST_TRIGGER_PRESCALER, BOARD_OSC32_PINSEL, ERR_BUSY, scif_osc32_opt_t::mode, OSC32_STARTUP_8192, SCIF_OSC_MODE_2PIN_CRYSTAL_HICUR, scif_start_osc32(), STATUS_OK, SYSCLK_AST, sysclk_disable_pba_module(), sysclk_enable_hsb_module(), sysclk_enable_pba_module(), and SYSCLK_EVENT.

Referenced by main().

ISR	(	ACIFB_interrupt_handler	,
		AVR32_ACIFB_IRQ_GROUP	,
		AC_INTERRUPT_PRIORITY
	)

ACIFB ISR Routine.

References acifb, acifb_clear_comparison_interrupt_flag(), and EXAMPLE_ACIFB_CHANNEL.

int main ( void )

Main Application Routine.

Initialize the system clocks
Initialize the sleep manager
Initialize the power save measures
Initialize the ACIFB module
Initialize the AST to trigger ACIFB at regular intervals
Go to STATIC sleep mode and wake up on a touch status change

References ac_init(), ast_clear_all_status_flags(), ast_init(), DBG_USART, delay_init, delay_ms, ERROR_LED, gpio_clr_gpio_pin(), gpio_set_gpio_pin(), gpio_tgl_gpio_pin(), init_dbg_rs232(), LED_DELAY, pm_asyn_wake_up_disable(), pm_asyn_wake_up_enable(), power_save_measures_init(), print_dbg(), sleepmgr_enter_sleep(), sleepmgr_init(), sleepmgr_lock_mode(), SLEEPMGR_STATIC, STATUS_LED, STATUS_OK, sysclk_disable_pba_module(), sysclk_enable_pba_module(), sysclk_enable_peripheral_clock(), sysclk_get_cpu_hz(), sysclk_get_pba_hz(), SYSCLK_GPIO, and sysclk_init().

static void power_save_measures_init ( )

static

Initializes the power saving measures to reduce power consumption.

Low Power Configuration Initializes the power saving measures to reduce power consumption.

Enable pull-ups on GPIO pins
Disable the clocks to unwanted modules
Disable internal voltage regulator when in 1.8V supply mode

References gpio_configure_group(), GPIO_DIR_INPUT, GPIO_PULL_UP, gpio_used_pins, sysclk_disable_cpu_module(), and SYSCLK_OCD.

Referenced by main().

volatile avr32_acifb_t* acifb = AC

Global variable to Store the ACIFB module address.

Referenced by ac_init(), and ISR().

uint32_t gpio_used_pins[NB_GPIO_USED_PINS]

Initial value:

= {
    EXAMPLE_ACIFBP_PIN,
    EXAMPLE_ACIFBN_PIN,
    STATUS_LED,
    ERROR_LED,
    AVR32_SCIF_XIN32_0_PIN,
    AVR32_SCIF_XOUT32_0_PIN
}

Array to hold the used GPIO pins.

Referenced by power_save_measures_init().

Microchip® Advanced Software Framework

Macros

Functions

Variables