twi_slave_example.c File Reference

#include <avr32/io.h>
#include "board.h"
#include "print_funcs.h"
#include "gpio.h"
#include "pm.h"
#include "twi.h"

Macros
#define	EEPROM_ADDR_LGT   3
#define	EEPROM_ADDRESS   0x50
#define	PATTERN_TEST_LENGTH   (sizeof(test_pattern)/sizeof(U8))
	Constants to define the sent and received pattern. More...
#define	TWI_MEM_ADDR   1
#define	TWI_MEM_DATA   2
#define	TWI_MEM_IDLE   0
#define	TWI_MEM_SIZE   20
	Defines & Variables to manage a virtual TWI memory. More...
#define	TWI_SPEED   50000
#define	VIRTUALMEM_ADDR_START   0x123456

Functions
int	main (void)
	Main function. More...
static void	twi_slave_rx (U8 u8_value)
	Manage the received data on TWI. More...
static void	twi_slave_stop (void)
	Manage stop transfer reception on TWI. More...
static U8	twi_slave_tx (void)
	Transmit a data on TWI. More...

Variables
U8	s_memory [TWI_MEM_SIZE] ={0}
U8	s_status_cmd = TWI_MEM_IDLE
U32	s_u32_addr
U8	s_u8_addr_pos
const U8	test_pattern []

#define EEPROM_ADDR_LGT   3

Referenced by twi_slave_rx().

#define EEPROM_ADDRESS   0x50

Referenced by main().

#define PATTERN_TEST_LENGTH   (sizeof(test_pattern)/sizeof(U8))

Constants to define the sent and received pattern.

#define TWI_MEM_ADDR   1

Referenced by twi_slave_rx().

#define TWI_MEM_DATA   2

Referenced by twi_slave_rx(), and twi_slave_tx().

#define TWI_MEM_IDLE   0

Referenced by twi_slave_rx(), and twi_slave_stop().

#define TWI_MEM_SIZE   20

Defines & Variables to manage a virtual TWI memory.

Referenced by twi_slave_rx(), and twi_slave_tx().

#define TWI_SPEED   50000

Referenced by main().

#define VIRTUALMEM_ADDR_START   0x123456

Referenced by twi_slave_rx(), and twi_slave_tx().

int main

(

void

)

Main function.

References twi_options_t::chip, cpu_irq_enable, EEPROM_ADDRESS, FOSC0, gpio_enable_module(), init_dbg_rs232(), irq_initialize_vectors, opt, twi_options_t::pba_hz, pm_switch_to_osc0(), print_dbg(), twi_slave_fct_t::rx, twi_options_t::speed, status, twi_slave_fct_t::stop, twi_slave_fct, twi_slave_init(), twi_slave_rx(), twi_slave_stop(), twi_slave_tx(), TWI_SPEED, TWI_SUCCESS, and twi_slave_fct_t::tx.

static void twi_slave_rx ( U8  u8_value )

static

Manage the received data on TWI.

References EEPROM_ADDR_LGT, s_memory, s_status_cmd, s_u32_addr, s_u8_addr_pos, TWI_MEM_ADDR, TWI_MEM_DATA, TWI_MEM_IDLE, TWI_MEM_SIZE, and VIRTUALMEM_ADDR_START.

Referenced by main().

static void twi_slave_stop ( void  )

static

Manage stop transfer reception on TWI.

References s_status_cmd, and TWI_MEM_IDLE.

Referenced by main().

static U8 twi_slave_tx ( void  )

static

Transmit a data on TWI.

References s_memory, s_status_cmd, s_u32_addr, TWI_MEM_DATA, TWI_MEM_SIZE, and VIRTUALMEM_ADDR_START.

Referenced by main().

U8 s_memory[TWI_MEM_SIZE] ={0}

Referenced by twi_slave_rx(), and twi_slave_tx().

U8 s_status_cmd = TWI_MEM_IDLE

Referenced by twi_slave_rx(), twi_slave_stop(), and twi_slave_tx().

U32 s_u32_addr

Referenced by twi_slave_rx(), and twi_slave_tx().

U8 s_u8_addr_pos

Referenced by twi_slave_rx().

const U8 test_pattern[]

Initial value:

=  {
   0xAA,
   0x55,
   0xA5,
   0x5A,
   0x77,
   0x99}

Referenced by main().