twim_example.c File Reference

TWIM Master Example for SAM.

Copyright (c) 2012-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include "conf_example.h"
#include "sleepmgr.h"

Macros
#define	PATTERN_TEST_LENGTH   (sizeof(write_data)/sizeof(uint8_t))

Functions
static void	configure_console (void)
	Configure serial console. More...
static status_code_t	init_test (void)
	Initialize the TWIM module. More...
static status_code_t	read_test (void)
	Read the data pattern from the target. More...
static status_code_t	write_test (void)
	Write the data pattern to the target. More...
int	main (void)

Variables
uint32_t	cpu_speed = 0
twi_package_t	packet_rx
twi_package_t	packet_tx
	TWI data package. More...
uint8_t	read_data [PATTERN_TEST_LENGTH]
	Array to store the received test data. More...
const uint8_t	write_data []
	Array to store the test data for sending. More...

#define PATTERN_TEST_LENGTH   (sizeof(write_data)/sizeof(uint8_t))

Referenced by main(), read_test(), and write_test().

static void configure_console ( void  )

static

Configure serial console.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_CHAR_LENGTH, CONF_UART_PARITY, CONF_UART_STOP_BITS, and stdio_serial_init().

Referenced by main().

static status_code_t init_test ( void  )

static

Initialize the TWIM module.

Returns

STATUS_OK if the initialization succeeds, error code otherwise.

References cpu_speed, EXAMPLE_TWIM, sysclk_get_peripheral_bus_hz(), twim_config::twim_clk, twim_default_callback(), TWIM_MASTER_SPEED, twim_set_callback(), and twim_set_config().

Referenced by main().

int main

(

void

)

Remarks

Main function.

References board_init(), BOARD_NAME, configure_console(), init_test(), PATTERN_TEST_LENGTH, read_data, read_test(), sleepmgr_enter_sleep(), STATUS_OK, sysclk_init(), write_data, and write_test().

static status_code_t read_test ( void  )

static

Read the data pattern from the target.

Returns

STATUS_OK If all bytes were read, error code otherwise

References EXAMPLE_TWIM, packet_rx, PATTERN_TEST_LENGTH, read_data, TARGET_ADDR_LGT, TARGET_ADDRESS, twi_master_read(), and VIRTUALMEM_ADDR.

Referenced by main().

static status_code_t write_test ( void  )

static

Write the data pattern to the target.

Returns

STATUS_OK if all bytes were written, error code otherwise.

References EXAMPLE_TWIM, packet_tx, PATTERN_TEST_LENGTH, TARGET_ADDR_LGT, TARGET_ADDRESS, twi_master_write(), VIRTUALMEM_ADDR, and write_data.

Referenced by main().

uint32_t cpu_speed = 0

Referenced by init_test().

twi_package_t packet_rx

Referenced by read_test().

twi_package_t packet_tx

TWI data package.

Referenced by write_test().

uint8_t read_data[PATTERN_TEST_LENGTH]

Array to store the received test data.

Referenced by main(), and read_test().

const uint8_t write_data[]

Initial value:

= {
    'S', 'A', 'M', '4', 'L', ' ', 'T', 'W', 'I', 'M', ' ', 'M',
    'a', 's', 't', 'e', 'r', ' ', 'E', 'x', 'a', 'm', 'p', 'l', 'e'
}

Array to store the test data for sending.

Referenced by main(), and write_test().