qs_i2c_slave_dma.c File Reference

SAM SERCOM I2C Slave with DMA Quick Start Guide.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>

Macros
#define	DATA_LENGTH   10
	[address] More...
#define	SLAVE_ADDRESS   0x12
	[address] More...

Functions
void	configure_dma_resource (struct dma_resource *resource)
	[configure_dac_channel] More...
void	configure_i2c_slave (void)
	[module] More...
int	main (void)
void	setup_dma_descriptor (DmacDescriptor *descriptor)
	[config_dma_resource] More...

Variables
struct dma_resource	i2c_dma_resource
	[initialize_i2c] More...
struct i2c_slave_module	i2c_slave_instance
	[packet_data] More...
uint8_t	read_buffer [DATA_LENGTH]
DmacDescriptor i2c_dma_descriptor	SECTION_DMAC_DESCRIPTOR
	[dma_resource] More...

#define DATA_LENGTH   10

[address]

[packet_data]

Referenced by setup_dma_descriptor().

#define SLAVE_ADDRESS   0x12

[address]

static void configure_dma_resource

(

struct dma_resource *

resource

)

[configure_dac_channel]

[_transfer_done]

[config_dma_resource]

[dma_setup_1]

[dma_setup_1]

[dma_setup_2]

[dma_setup_2]

[dma_setup_3]

[dma_setup_3]

[dma_setup_4]

[dma_setup_4]

References dma_allocate(), dma_get_config_defaults(), DMA_TRIGGER_ACTION_BEAT, dma_resource_config::peripheral_trigger, and dma_resource_config::trigger_action.

void configure_i2c_slave

(

void

)

[module]

[initialize_i2c]

[init_conf]

[init_conf]

[conf_changes]

[conf_changes]

[init_module]

[init_module]

[enable_module]

[enable_module]

int main

(

void

)

[init] [config_i2c]

[config_i2c]

[config_dma]

[config_dma] [init]

[main] [wait_packet]

[wait_packet]

[clear_status]

[clear_status] [main]

References configure_dma_resource(), configure_i2c_slave(), dma_add_descriptor(), dma_start_transfer_job(), i2c_dma_resource, i2c_slave_dma_read_interrupt_status(), i2c_slave_dma_write_interrupt_status(), i2c_slave_instance, setup_dma_descriptor(), and system_init().

void setup_dma_descriptor

(

DmacDescriptor *

descriptor

)

[config_dma_resource]

[setup_dma_transfer_descriptor]

[dma_setup_5]

[dma_setup_5]

[dma_setup_6]

[dma_setup_6]

[dma_setup_7]

[dma_setup_7]

[dma_setup_8]

[dma_setup_8]

References dma_descriptor_config::beat_size, dma_descriptor_config::block_transfer_count, DATA_LENGTH, dma_descriptor_config::destination_address, DMA_BEAT_SIZE_BYTE, dma_descriptor_create(), dma_descriptor_get_config_defaults(), i2c_slave_instance, read_buffer, dma_descriptor_config::source_address, and dma_descriptor_config::src_increment_enable.

struct dma_resource i2c_dma_resource

[initialize_i2c]

[dma_resource]

Referenced by main().

struct i2c_slave_module i2c_slave_instance

[packet_data]

[module]

uint8_t read_buffer[DATA_LENGTH]

DmacDescriptor i2c_dma_descriptor SECTION_DMAC_DESCRIPTOR

[dma_resource]