twi_slave_example.c File Reference

TWI SLAVE Example for SAM.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"
#include "conf_example.h"

Macros
#define	STRING_EOL   "\r"
#define	STRING_HEADER
#define	SLAVE_ADDRESS   0x50 /** Target's TWI address */
	Information about TWIS Module. More...
#define	SLAVE_ADDR_LGT   2 /** Address length of virtual mem */
#define	VIRTUALMEM_ADDR_START   0 /** Address of virtual mem */
#define	TWI_MEM_SIZE   50 /** The size of the virtual mem */
	Defines to manage a virtual TWI memory. More...
#define	TWI_MEM_IDLE   0 /** Idle state */
#define	TWI_MEM_ADDR   1 /** Address state */
#define	TWI_MEM_DATA   2 /** Data state */

Functions
static void	configure_console (void)
	Configure serial console. More...
int	main (void)
	Application entry point for TWI Slave example. More...
static void	twis_slave_error (void)
	Manage Error on TWIS. More...
static void	twis_slave_rx (uint8_t value)
	Manage the received data on TWI. More...
static void	twis_slave_stop (void)
	Manage stop transfer reception on TWIS. More...
static uint8_t	twis_slave_tx (void)
	Transmit a data on TWIS. More...

Variables
uint32_t	addr
	The current address in the virtual mem. More...
uint8_t	addr_pos
	Offset in the address value. More...
uint8_t	memory [TWI_MEM_SIZE]
	Content of the Virtual mem. More...
uint8_t	status_cmd = TWI_MEM_IDLE
	State variable. More...
struct twis_dev_inst	twis_device

#define SLAVE_ADDR_LGT   2 /** Address length of virtual mem */

Referenced by twis_slave_rx().

#define SLAVE_ADDRESS   0x50 /** Target's TWI address */

Information about TWIS Module.

Referenced by main().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"--TWI SLAVE Example --\r\n" \
        "-- "BOARD_NAME" --\r\n" \
        "-- Compiled: "__DATE__" "__TIME__" --"STRING_EOL

Referenced by main().

#define TWI_MEM_ADDR   1 /** Address state */

Referenced by twis_slave_rx().

#define TWI_MEM_DATA   2 /** Data state */

Referenced by twis_slave_rx().

#define TWI_MEM_IDLE   0 /** Idle state */

Referenced by twis_slave_rx(), twis_slave_stop(), and twis_slave_tx().

#define TWI_MEM_SIZE   50 /** The size of the virtual mem */

Defines to manage a virtual TWI memory.

Referenced by twis_slave_rx(), and twis_slave_tx().

#define VIRTUALMEM_ADDR_START   0 /** Address of virtual mem */

Referenced by twis_slave_rx(), and twis_slave_tx().

static void configure_console ( void  )

static

Configure serial console.

References uart_rs232_options::baudrate, and stdio_serial_init().

Referenced by main().

int main

(

void

)

Application entry point for TWI Slave example.

Returns

Unused (ANSI-C compatibility).

References board_init(), twis_config::chip, configure_console(), twis_callback::error, twis_callback::rx, SLAVE_ADDRESS, STATUS_OK, twis_callback::stop, STRING_HEADER, sysclk_init(), twis_device, twis_enable(), twis_get_config_defaults(), twis_init(), TWIS_INTERRUPT_SLAVEADR_MATCH, twis_set_callback(), twis_slave_error(), twis_slave_rx(), twis_slave_stop(), twis_slave_tx(), and twis_callback::tx.

static void twis_slave_error ( void  )

static

Manage Error on TWIS.

Remarks

User defined operations on Error condition

Referenced by main().

static void twis_slave_rx ( uint8_t  value )

static

Manage the received data on TWI.

Remarks

User defined operations after reception

References SLAVE_ADDR_LGT, TWI_MEM_ADDR, TWI_MEM_DATA, TWI_MEM_IDLE, TWI_MEM_SIZE, and VIRTUALMEM_ADDR_START.

Referenced by main().

static void twis_slave_stop ( void  )

static

Manage stop transfer reception on TWIS.

Remarks

User defined operations on Stop condition

References TWI_MEM_IDLE.

Referenced by main().

static uint8_t twis_slave_tx ( void  )

static

Transmit a data on TWIS.

Remarks

User defined operations during transmission

References TWI_MEM_IDLE, TWI_MEM_SIZE, and VIRTUALMEM_ADDR_START.

Referenced by main().

uint32_t addr

The current address in the virtual mem.

Referenced by appCmdBuffer(), at45dbx_read_byte_open(), at45dbx_write_byte_open(), hx8347a_write_ram_buffer(), inet_chksum_pseudo(), inet_chksum_pseudo_partial(), main(), NWK_SetAddr(), and print_pairing_table().

uint8_t addr_pos

Offset in the address value.

uint8_t memory[TWI_MEM_SIZE]

Content of the Virtual mem.

uint8_t status_cmd = TWI_MEM_IDLE

State variable.

struct twis_dev_inst twis_device

Referenced by main().