sam0/applications/ccl_example/main.c File Reference

CCL Example Application.

Copyright (c) 2016-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include "conf_ccl_example.h"

Macros
#define	BUF_LENGTH   10
	Create arrays for storing modulator signal period and compare value. More...

Functions
void	configure_ccl_lut0 (void)
static void	configure_dma_channel_0 (DmacDescriptor *descriptor)
static void	configure_dma_channel_1 (DmacDescriptor *descriptor)
void	configure_dma_evsys (void)
static void	configure_dma_resource (struct dma_resource *resource)
void	configure_dmac (void)
void	configure_tc_alt (void)
void	configure_tc_def (void)
void	configure_tc_evsys (void)
int	main (void)

Variables
DmacDescriptor	descriptor0
	Create descriptors for DMA. More...
DmacDescriptor	descriptor1
struct dma_resource	dma_ch_0
struct dma_resource	dma_ch_1
uint8_t	period_buffer [BUF_LENGTH] = {0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7}
struct tc_module	tc_alt
struct tc_module	tc_def
	Create structs for TC and DMA. More...
uint8_t	value_buffer [BUF_LENGTH] = {0x2,0x2,0x2,0x2,0x2,0x5,0x5,0x5,0x5,0x5}

#define BUF_LENGTH   10

Create arrays for storing modulator signal period and compare value.

Referenced by configure_dma_channel_0(), and configure_dma_channel_1().

void configure_ccl_lut0

(

void

)

Creates a new configuration structure for CCL.

Apply the default settings.

Initialize CCL with the user settings.

Creates a new configuration structure for LUT0.

Apply the default settings.

Configure LUT0.

Set up LUT0 output pin.

Initialize and enable LUT0 with the user settings.

Enable CCL module.

static void configure_dma_channel_0 ( DmacDescriptor *  descriptor )

static

Creates a new configuration structure for the DMA descriptor.

Apply the default settings.

Configure the DMA descriptor.

References dma_descriptor_config::beat_size, dma_descriptor_config::block_action, dma_descriptor_config::block_transfer_count, BUF_LENGTH, descriptor_section, dma_descriptor_config::destination_address, DMA_ADDRESS_INCREMENT_STEP_SIZE_1, DMA_BEAT_SIZE_BYTE, DMA_BLOCK_ACTION_NOACT, dma_descriptor_create(), dma_descriptor_get_config_defaults(), DMA_STEPSEL_SRC, dma_descriptor_config::dst_increment_enable, dma_descriptor_config::next_descriptor_address, period_buffer, dma_descriptor_config::source_address, dma_descriptor_config::src_increment_enable, dma_descriptor_config::step_selection, dma_descriptor_config::step_size, and tc_alt.

Referenced by configure_dmac().

static void configure_dma_channel_1 ( DmacDescriptor *  descriptor )

static

Creates a new configuration structure for the DMA descriptor.

Apply the default settings.

Configure the DMA descriptor.

References dma_descriptor_config::beat_size, dma_descriptor_config::block_action, dma_descriptor_config::block_transfer_count, BUF_LENGTH, descriptor_section, dma_descriptor_config::destination_address, DMA_ADDRESS_INCREMENT_STEP_SIZE_1, DMA_BEAT_SIZE_BYTE, DMA_BLOCK_ACTION_NOACT, dma_descriptor_create(), dma_descriptor_get_config_defaults(), DMA_STEPSEL_SRC, dma_descriptor_config::dst_increment_enable, dma_descriptor_config::next_descriptor_address, dma_descriptor_config::source_address, dma_descriptor_config::src_increment_enable, dma_descriptor_config::step_selection, dma_descriptor_config::step_size, tc_alt, and value_buffer.

Referenced by configure_dmac().

void configure_dma_evsys

(

void

)

Create new event structs.

Use generator CCL_ALTTC overflow.

Attach DMAC channel 0/1 as users.

References events_config::clock_source, events_config::edge_detect, events_allocate(), events_attach_user(), EVENTS_EDGE_DETECT_NONE, events_get_config_defaults(), EVENTS_PATH_RESYNCHRONIZED, GCLK_GENERATOR_1, events_config::generator, and events_config::path.

Referenced by main().

static void configure_dma_resource ( struct dma_resource *  resource )

static

Creates a new configuration structure for the DMA resource.

Apply the default settings.

Configure DMAC channel 0/1 to transfer data on TC overflow.

Allocate DMAC channel 0/1.

void configure_dmac

(

void

)

Configure the DMA resources and channels.

Add both descriptors.

Enable both channels for transfer.

References configure_dma_channel_0(), configure_dma_channel_1(), configure_dma_resource(), descriptor0, descriptor1, dma_add_descriptor(), dma_ch_0, dma_ch_1, and dma_start_transfer_job().

Referenced by main().

void configure_tc_alt

(

void

)

Creates a new configuration structure for CCL_ALTTC.

Apply the default settings.

Configure CCL_ALTTC.

Initialize and enable CCL_ALTTC with the user settings.

Creates a new configuration structure for CCL_ALTTC event.

Configure CCL_ALTTC event.

Enable CCL_ALTTC event.

References tc_config::clock_prescaler, tc_config::clock_source, tc_8bit_config::compare_capture_channel, tc_config::count_direction, tc_config::counter_8_bit, tc_config::counter_size, tc_config::double_buffering_enabled, tc_pwm_channel::enabled, tc_events::event_action, GCLK_GENERATOR_1, tc_events::generate_event_on_compare_channel, tc_events::generate_event_on_overflow, tc_events::invert_event_input, tc_events::on_event_perform_action, tc_8bit_config::period, tc_pwm_channel::pin_mux, tc_pwm_channel::pin_out, tc_config::pwm_channel, tc_config::reload_action, tc_config::run_in_standby, tc_alt, TC_CLOCK_PRESCALER_DIV1, TC_COMPARE_CAPTURE_CHANNEL_0, TC_COUNT_DIRECTION_UP, TC_COUNTER_SIZE_8BIT, tc_enable_events(), TC_EVENT_ACTION_INCREMENT_COUNTER, tc_get_config_defaults(), tc_init(), TC_RELOAD_ACTION_RESYNC, TC_WAVE_GENERATION_NORMAL_PWM, TC_WAVEFORM_INVERT_OUTPUT_NONE, tc_8bit_config::value, tc_config::wave_generation, and tc_config::waveform_invert_output.

Referenced by main().

void configure_tc_def

(

void

)

Creates a new configuration structure for CCL_TC.

Apply the default settings.

Configure CCL_TC.

Initialize and enable CCL_TC with the user settings.

Creates a new configuration structure for CCL_TC event.

Configure CCL_TC event.

Enable CCL_TC event.

References tc_config::clock_prescaler, tc_config::clock_source, tc_8bit_config::compare_capture_channel, tc_config::count_direction, tc_config::counter_8_bit, tc_config::counter_size, tc_config::double_buffering_enabled, tc_pwm_channel::enabled, tc_events::event_action, GCLK_GENERATOR_1, tc_events::generate_event_on_compare_channel, tc_events::generate_event_on_overflow, tc_events::invert_event_input, tc_events::on_event_perform_action, tc_8bit_config::period, tc_pwm_channel::pin_mux, tc_pwm_channel::pin_out, tc_config::pwm_channel, tc_config::reload_action, tc_config::run_in_standby, TC_CLOCK_PRESCALER_DIV1, TC_COMPARE_CAPTURE_CHANNEL_0, TC_COUNT_DIRECTION_UP, TC_COUNTER_SIZE_8BIT, tc_def, tc_enable_events(), TC_EVENT_ACTION_OFF, tc_get_config_defaults(), tc_init(), TC_RELOAD_ACTION_GCLK, TC_WAVE_GENERATION_NORMAL_PWM, TC_WAVEFORM_INVERT_OUTPUT_NONE, tc_8bit_config::value, tc_config::wave_generation, and tc_config::waveform_invert_output.

Referenced by main().

void configure_tc_evsys

(

void

)

Create new event structs.

Use generator CCL_TC overflow.

Attach CCL_ALTTC as user.

References events_config::clock_source, events_config::edge_detect, events_allocate(), events_attach_user(), EVENTS_EDGE_DETECT_NONE, events_get_config_defaults(), EVENTS_PATH_ASYNCHRONOUS, GCLK_GENERATOR_1, events_config::generator, and events_config::path.

Referenced by main().

int main

(

void

)

Configure TC, DMAC and CCL.

Configure event system.

Enable CCL_TC and CCL_ALTTC.

Enter Standby sleep mode.

Keep alive while generating IR encoded signal.

References configure_ccl_lut0(), configure_dma_evsys(), configure_dmac(), configure_tc_alt(), configure_tc_def(), configure_tc_evsys(), system_init(), system_set_sleepmode(), system_sleep(), SYSTEM_SLEEPMODE_STANDBY, tc_alt, tc_def, and tc_enable().

DmacDescriptor descriptor0

Create descriptors for DMA.

Referenced by configure_dmac().

DmacDescriptor descriptor1

Referenced by configure_dmac().

struct dma_resource dma_ch_0

Referenced by configure_dmac().

struct dma_resource dma_ch_1

Referenced by configure_dmac().

uint8_t period_buffer[BUF_LENGTH] = {0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7}

Referenced by configure_dma_channel_0().

struct tc_module tc_alt

Referenced by configure_dma_channel_0(), configure_dma_channel_1(), configure_tc_alt(), and main().

struct tc_module tc_def

Create structs for TC and DMA.

Referenced by configure_tc_def(), and main().

uint8_t value_buffer[BUF_LENGTH] = {0x2,0x2,0x2,0x2,0x2,0x5,0x5,0x5,0x5,0x5}

Referenced by configure_dma_channel_1().