low_power_demo.c File Reference

#include <string.h>
#include <asf.h>
#include "conf_app.h"

Macros
#define	_SYSTEM_MCU_REVISION_B   1
#define	BUFFER_LEN   10
#define	LED0_TOGGLE_TIME   200

Enumerations
enum	led_toggle_times {   LED0_TOGGLE_2 = 2,   LED0_TOGGLE_4 = 4,   LED0_TOGGLE_6 = 6,   LED0_TOGGLE_8 = 8 }
	LED0 toggles times. More...

Functions
static void	configure_adc (void)
	Configure ADC to sample the internal scaled VCC. More...
static void	configure_dma (void)
	Config DMA to make peripheral-to-memory transfer from the ADC to the HMCRAMLP memory. More...
static void	configure_event (void)
	Configure EVENT to route RTC events to the ADC. More...
static void	configure_extint_channel (void)
	Config external interrupt. More...
static void	configure_rtc (void)
	Configure RTC as ADC sample timer. More...
static void	configure_usart (void)
	Configure usart. More...
static void	display_menu (void)
	Display menu. More...
static void	dma_callback (void)
	DMA callback function for transfer complete. More...
static void	extint_callback (void)
static void	led_toggle_indication (uint32_t count)
	Toggles LED as an indication. More...
int	main (void)
static void	main_clock_select (const enum system_clock_source clock_source)
	Main clock source selection between DFLL and OSC16M. More...
static void	main_clock_select_dfll (void)
	Setect DFLL as main clock source. More...
static void	main_clock_select_osc16m (void)
	Setect OSC16M as main clock source. More...
static void	test_active_mode (const enum system_performance_level performance_level)
	Active mode test case. More...
static void	test_backup_mode (void)
	BACKUP mode test case. More...
static void	test_idle_mode (void)
	Idle mode test case. More...
static void	test_off_mode (void)
	OFF mode test case. More...
static void	test_standby_mode_dynamic_power_sleepwalking (void)
	STANDBY mode test case:Dynamic Power SleepWalking. More...
static void	test_standby_mode_static_power_sleepwalking (void)
	STANDBY mode test case: static power sleepwalking. More...

Variables
static struct adc_module	adc_instance
	Support and FAQ: visit Microchip Support More...
static struct events_resource	event
struct dma_resource	example_resource
static struct rtc_module	rtc_instance
DmacDescriptor example_descriptor	SECTION_DMAC_DESCRIPTOR
static struct usart_module	usart_instance

#define _SYSTEM_MCU_REVISION_B   1

Referenced by test_standby_mode_dynamic_power_sleepwalking(), and test_standby_mode_static_power_sleepwalking().

#define BUFFER_LEN   10

Referenced by configure_dma(), and test_standby_mode_dynamic_power_sleepwalking().

#define LED0_TOGGLE_TIME   200

Referenced by led_toggle_indication().

enum led_toggle_times

LED0 toggles times.

Enumerator
LED0_TOGGLE_2
LED0_TOGGLE_4
LED0_TOGGLE_6
LED0_TOGGLE_8

static void configure_adc ( void  )

static

Configure ADC to sample the internal scaled VCC.

References ADC_CLOCK_PRESCALER_DIV4, adc_enable(), ADC_EVENT_ACTION_START_CONV, adc_get_config_defaults(), adc_init(), adc_instance, ADC_REFERENCE_INTREF, ADC_RESOLUTION_12BIT, adc_config::clock_prescaler, adc_config::clock_source, adc_config::event_action, GCLK_GENERATOR_0, adc_config::on_demand, adc_config::reference, adc_config::resolution, and adc_config::run_in_standby.

Referenced by test_standby_mode_dynamic_power_sleepwalking().

static void configure_dma ( void  )

static

Config DMA to make peripheral-to-memory transfer from the ADC to the HMCRAMLP memory.

References adc_instance, dma_descriptor_config::beat_size, dma_descriptor_config::block_transfer_count, BUFFER_LEN, dma_descriptor_config::destination_address, dma_add_descriptor(), dma_allocate(), DMA_BEAT_SIZE_HWORD, dma_callback(), DMA_CALLBACK_TRANSFER_DONE, dma_descriptor_create(), dma_descriptor_get_config_defaults(), dma_enable_callback(), dma_get_config_defaults(), dma_register_callback(), dma_start_transfer_job(), DMA_TRIGGER_ACTION_BEAT, example_resource, dma_descriptor_config::next_descriptor_address, dma_resource_config::peripheral_trigger, dma_descriptor_config::source_address, dma_descriptor_config::src_increment_enable, and dma_resource_config::trigger_action.

Referenced by test_standby_mode_dynamic_power_sleepwalking().

static void configure_event ( void  )

static

Configure EVENT to route RTC events to the ADC.

References events_config::clock_source, event, events_allocate(), events_attach_user(), events_get_config_defaults(), EVENTS_PATH_ASYNCHRONOUS, GCLK_GENERATOR_0, events_config::generator, events_config::path, system_apb_clock_set_mask(), and SYSTEM_CLOCK_APB_APBD.

Referenced by test_standby_mode_dynamic_power_sleepwalking().

static void configure_extint_channel ( void  )

static

Config external interrupt.

References BUTTON_0_EIC_LINE, BUTTON_0_EIC_MUX, BUTTON_0_EIC_PIN, extint_chan_conf::detection_criteria, extint_callback(), EXTINT_CALLBACK_TYPE_DETECT, extint_chan_clear_detected(), extint_chan_enable_callback(), extint_chan_get_config_defaults(), extint_chan_is_detected(), extint_chan_set_config(), EXTINT_DETECT_BOTH, EXTINT_PULL_UP, extint_register_callback(), extint_chan_conf::gpio_pin, extint_chan_conf::gpio_pin_mux, and extint_chan_conf::gpio_pin_pull.

Referenced by main().

static void configure_rtc ( void  )

static

Configure RTC as ADC sample timer.

References rtc_count_config::clear_on_match, rtc_count_config::compare_values, rtc_count_events::generate_event_on_compare, rtc_count_config::mode, rtc_count_config::prescaler, rtc_count_enable(), rtc_count_enable_events(), rtc_count_get_config_defaults(), rtc_count_init(), RTC_COUNT_MODE_32BIT, RTC_COUNT_PRESCALER_DIV_64, and rtc_instance.

Referenced by test_standby_mode_dynamic_power_sleepwalking().

static void configure_usart ( void  )

static

Configure usart.

References usart_config::baudrate, CONF_STDIO_BAUDRATE, CONF_STDIO_MUX_SETTING, CONF_STDIO_PINMUX_PAD0, CONF_STDIO_PINMUX_PAD1, CONF_STDIO_PINMUX_PAD2, CONF_STDIO_PINMUX_PAD3, CONF_STDIO_USART, usart_config::mux_setting, usart_config::pinmux_pad0, usart_config::pinmux_pad1, usart_config::pinmux_pad2, usart_config::pinmux_pad3, usart_enable(), usart_get_config_defaults(), and usart_instance.

Referenced by main(), test_standby_mode_dynamic_power_sleepwalking(), and test_standby_mode_static_power_sleepwalking().

static void display_menu ( void  )

static

Display menu.

Referenced by main().

static void dma_callback ( void  )

static

DMA callback function for transfer complete.

Referenced by configure_dma().

static void extint_callback ( void  )

static

Referenced by configure_extint_channel().

static void led_toggle_indication ( uint32_t  count )

static

Toggles LED as an indication.

References delay_ms, LED0_TOGGLE_TIME, LED_0_ACTIVE, LED_0_INACTIVE, LED_0_PIN, and port_pin_set_output_level().

Referenced by main(), test_active_mode(), test_idle_mode(), test_standby_mode_dynamic_power_sleepwalking(), and test_standby_mode_static_power_sleepwalking().

int main

(

void

)

References CONF_EXT_WAKEUP_PIN, configure_extint_channel(), configure_usart(), delay_init(), display_menu(), LED0_TOGGLE_8, LED_0_ACTIVE, LED_0_PIN, led_toggle_indication(), port_pin_set_output_level(), system_get_backup_exit_source(), system_get_reset_cause(), system_init(), SYSTEM_PERFORMANCE_LEVEL_0, SYSTEM_PERFORMANCE_LEVEL_2, SYSTEM_RESET_CAUSE_BACKUP, test_active_mode(), test_backup_mode(), test_idle_mode(), test_off_mode(), test_standby_mode_dynamic_power_sleepwalking(), test_standby_mode_static_power_sleepwalking(), usart_instance, usart_read_wait(), and usart_reset().

static void main_clock_select ( const enum system_clock_source  clock_source )

static

Main clock source selection between DFLL and OSC16M.

References GCLK_GENERATOR_1, main_clock_select_dfll(), main_clock_select_osc16m(), SYSTEM_CLOCK_SOURCE_DFLL, system_clock_source_disable(), SYSTEM_CLOCK_SOURCE_OSC16M, system_gclk_chan_disable(), and system_gclk_gen_disable().

Referenced by test_active_mode().

static void main_clock_select_dfll ( void  )

static

Setect DFLL as main clock source.

References CONF_CLOCK_DFLL_MULTIPLY_FACTOR, CONF_CLOCK_DFLL_ON_DEMAND, CONF_CLOCK_DFLL_RUN_IN_STANDBY, GCLK_GENERATOR_0, GCLK_GENERATOR_1, system_clock_source_dfll_config::loop_mode, system_clock_source_dfll_config::multiply_factor, system_clock_source_dfll_config::on_demand, system_clock_source_dfll_config::run_in_stanby, system_gclk_gen_config::source_clock, system_gclk_chan_config::source_generator, SYSTEM_CLOCK_DFLL_LOOP_MODE_CLOSED, SYSTEM_CLOCK_SOURCE_DFLL, system_clock_source_dfll_get_config_defaults(), system_clock_source_dfll_set_config(), system_clock_source_enable(), system_clock_source_is_ready(), SYSTEM_CLOCK_SOURCE_XOSC32K, system_gclk_chan_enable(), system_gclk_chan_get_config_defaults(), system_gclk_chan_set_config(), system_gclk_gen_enable(), system_gclk_gen_get_config_defaults(), and system_gclk_gen_set_config().

Referenced by main_clock_select().

static void main_clock_select_osc16m ( void  )

static

Setect OSC16M as main clock source.

References CONF_CLOCK_OSC16M_FREQ_SEL, CONF_CLOCK_OSC16M_ON_DEMAND, CONF_CLOCK_OSC16M_RUN_IN_STANDBY, system_clock_source_osc16m_config::fsel, GCLK_GENERATOR_0, system_clock_source_osc16m_config::on_demand, system_clock_source_osc16m_config::run_in_standby, system_gclk_gen_config::source_clock, system_clock_source_enable(), system_clock_source_is_ready(), SYSTEM_CLOCK_SOURCE_OSC16M, system_clock_source_osc16m_get_config_defaults(), system_clock_source_osc16m_set_config(), system_gclk_gen_get_config_defaults(), and system_gclk_gen_set_config().

Referenced by main_clock_select().

static void test_active_mode ( const enum system_performance_level  performance_level )

static

Active mode test case.

References LED0_TOGGLE_2, led_toggle_indication(), main_clock_select(), SYSTEM_CLOCK_SOURCE_DFLL, SYSTEM_CLOCK_SOURCE_OSC16M, system_get_performance_level(), and system_switch_performance_level().

Referenced by main(), test_idle_mode(), test_standby_mode_dynamic_power_sleepwalking(), and test_standby_mode_static_power_sleepwalking().

static void test_backup_mode ( void  )

static

BACKUP mode test case.

References CONF_EXT_WAKEUP_PIN, CONF_STDIO_PAD0_PIN, CONF_STDIO_PAD1_PIN, port_config::direction, LED_0_INACTIVE, LED_0_PIN, port_get_config_defaults(), PORT_PIN_DIR_OUTPUT, port_pin_set_config(), port_pin_set_output_level(), system_apb_clock_clear_mask(), SYSTEM_CLOCK_APB_APBC, system_gclk_chan_disable(), system_set_sleepmode(), system_sleep(), and SYSTEM_SLEEPMODE_BACKUP.

Referenced by main().

static void test_idle_mode ( void  )

static

Idle mode test case.

References LED0_TOGGLE_4, LED_0_INACTIVE, LED_0_PIN, led_toggle_indication(), port_pin_set_output_level(), SYSTEM_PERFORMANCE_LEVEL_0, system_set_sleepmode(), system_sleep(), SYSTEM_SLEEPMODE_IDLE, and test_active_mode().

Referenced by main().

static void test_off_mode ( void  )

static

OFF mode test case.

References system_set_sleepmode(), system_sleep(), and SYSTEM_SLEEPMODE_OFF.

Referenced by main().

static void test_standby_mode_dynamic_power_sleepwalking ( void  )

static

STANDBY mode test case:Dynamic Power SleepWalking.

References _SYSTEM_MCU_REVISION_B, BUFFER_LEN, configure_adc(), configure_dma(), configure_event(), configure_rtc(), configure_usart(), dma_start_transfer_job(), example_resource, LED0_TOGGLE_6, LED_0_INACTIVE, LED_0_PIN, led_toggle_indication(), port_pin_set_output_level(), system_clock_source_enable(), SYSTEM_CLOCK_SOURCE_XOSC32K, system_get_device_id(), system_get_performance_level(), SYSTEM_PERFORMANCE_LEVEL_0, system_set_sleepmode(), system_sleep(), SYSTEM_SLEEPMODE_STANDBY, system_standby_get_config_defaults(), system_standby_set_config(), test_active_mode(), usart_instance, and usart_reset().

Referenced by main().

static void test_standby_mode_static_power_sleepwalking ( void  )

static

STANDBY mode test case: static power sleepwalking.

References _SYSTEM_MCU_REVISION_B, configure_usart(), system_standby_config::hmcramchs_back_bias, system_standby_config::hmcramclp_back_bias, LED0_TOGGLE_6, LED_0_INACTIVE, LED_0_PIN, led_toggle_indication(), port_pin_set_output_level(), system_clock_source_disable(), system_clock_source_enable(), SYSTEM_CLOCK_SOURCE_XOSC32K, system_get_device_id(), system_get_performance_level(), SYSTEM_PERFORMANCE_LEVEL_0, SYSTEM_RAM_BACK_BIAS_STANDBY_OFF, system_set_sleepmode(), system_sleep(), SYSTEM_SLEEPMODE_STANDBY, system_standby_get_config_defaults(), system_standby_set_config(), test_active_mode(), usart_instance, and usart_reset().

Referenced by main().

struct adc_module adc_instance

static

Support and FAQ: visit Microchip Support

Referenced by configure_adc(), and configure_dma().

struct events_resource event

static

Referenced by configure_event().

struct dma_resource example_resource

Referenced by configure_dma(), and test_standby_mode_dynamic_power_sleepwalking().

struct rtc_module rtc_instance

static

Referenced by configure_rtc().

uint16_t adc_rslt [BUFFER_LEN] SECTION_DMAC_DESCRIPTOR

struct usart_module usart_instance

static

Referenced by configure_usart(), main(), test_standby_mode_dynamic_power_sleepwalking(), and test_standby_mode_static_power_sleepwalking().