drivers/sercom/i2c/unit_test/unit_test.c File Reference

SAM SERCOM I2C Unit test.

Copyright (c) 2015-2020 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include <stdio_serial.h>
#include <string.h>
#include "conf_test.h"

Macros
#define	DATA_LENGTH   10
#define	SLAVE_ADDRESS   0x12

Functions
static void	cdc_uart_init (void)
	Initialize the USART for unit test. More...
void	configure_i2c_slave_callbacks (void)
void	i2c_slave_read_request_callback (struct i2c_slave_module *const module)
void	i2c_slave_write_request_callback (struct i2c_slave_module *const module)
int	main (void)
	Run I2C master unit tests. More...
static void	run_i2c_full_speed_test (const struct test_case *test)
	Test full speed mode master transfer. More...
static void	run_i2c_init_test (const struct test_case *test)
	Test for I2C master and slave initialization. More...
static void	run_i2c_master_transfer_test (const struct test_case *test)
	Test for I2C master transfer. More...

Variables
struct usart_module	cdc_uart_module
static struct i2c_master_module	i2c_master_instance
static struct i2c_slave_module	i2c_slave_instance
static uint8_t	master_read_buffer [DATA_LENGTH] = {0}
static uint8_t	master_write_buffer [DATA_LENGTH]
static uint8_t	slave_buffer [DATA_LENGTH] = {0}
static struct i2c_slave_packet	slave_packet

#define DATA_LENGTH   10

Referenced by i2c_slave_read_request_callback(), i2c_slave_write_request_callback(), run_i2c_full_speed_test(), and run_i2c_master_transfer_test().

#define SLAVE_ADDRESS   0x12

Referenced by run_i2c_full_speed_test(), run_i2c_init_test(), and run_i2c_master_transfer_test().

static void cdc_uart_init ( void  )

static

Initialize the USART for unit test.

Initializes the SERCOM USART (SERCOM4) used for sending the unit test status to the computer via the EDBG CDC gateway.

References usart_config::baudrate, cdc_uart_module, CONF_STDIO_BAUDRATE, CONF_STDIO_MUX_SETTING, CONF_STDIO_PINMUX_PAD0, CONF_STDIO_PINMUX_PAD1, CONF_STDIO_PINMUX_PAD2, CONF_STDIO_PINMUX_PAD3, usart_config::mux_setting, usart_config::pinmux_pad0, usart_config::pinmux_pad1, usart_config::pinmux_pad2, usart_config::pinmux_pad3, usart_enable(), and usart_get_config_defaults().

Referenced by main().

void configure_i2c_slave_callbacks

(

void

)

void i2c_slave_read_request_callback

(

struct i2c_slave_module *const

module

)

References i2c_slave_packet::data, i2c_slave_packet::data_length, DATA_LENGTH, i2c_slave_write_packet_job(), slave_buffer, and slave_packet.

void i2c_slave_write_request_callback

(

struct i2c_slave_module *const

module

)

References i2c_slave_packet::data, i2c_slave_packet::data_length, DATA_LENGTH, i2c_slave_read_packet_job(), slave_buffer, and slave_packet.

int main

(

void

)

Run I2C master unit tests.

Initializes the system and serial output, then sets up the I2C master unit test suite and runs it.

References cdc_uart_init(), DEFINE_TEST_ARRAY, DEFINE_TEST_CASE, DEFINE_TEST_SUITE, NULL, run_i2c_full_speed_test(), run_i2c_init_test(), run_i2c_master_transfer_test(), system_init(), and test_suite_run().

static void run_i2c_full_speed_test ( const struct test_case *  test )

static

Test full speed mode master transfer.

test function with stop in full speed mode.

Parameters

test	Current test case.

References i2c_master_packet::address, i2c_master_config::baud_rate, i2c_master_config::buffer_timeout, i2c_master_packet::data, DATA_LENGTH, i, I2C_MASTER_BAUD_RATE_400KHZ, i2c_master_disable(), i2c_master_enable(), i2c_master_get_config_defaults(), i2c_master_init(), i2c_master_instance, i2c_master_read_packet_wait(), i2c_master_write_packet_wait(), master_read_buffer, master_write_buffer, i2c_master_config::pinmux_pad0, i2c_master_config::pinmux_pad1, SLAVE_ADDRESS, STATUS_OK, and test_assert_true.

Referenced by main().

static void run_i2c_init_test ( const struct test_case *  test )

static

Test for I2C master and slave initialization.

This test initializes the i2c master and slave and checks whether the initialization is successful or not.

Parameters

test	Current test case.

References i2c_slave_config::address, i2c_slave_config::address_mode, i2c_master_config::buffer_timeout, i2c_slave_config::buffer_timeout, configure_i2c_slave_callbacks(), i2c_master_enable(), i2c_master_get_config_defaults(), i2c_master_init(), i2c_master_instance, I2C_SLAVE_ADDRESS_MODE_MASK, i2c_slave_enable(), i2c_slave_get_config_defaults(), i2c_slave_init(), i2c_slave_instance, i2c_master_config::pinmux_pad0, i2c_slave_config::pinmux_pad0, i2c_master_config::pinmux_pad1, i2c_slave_config::pinmux_pad1, SLAVE_ADDRESS, STATUS_OK, and test_assert_true.

Referenced by main().

static void run_i2c_master_transfer_test ( const struct test_case *  test )

static

Test for I2C master transfer.

First test transfer function with stop. write to slave, read from slave and then compare the data. the slave send out the data it received, so master write and read data should be the same.

Then test transfer function without stop. write to slave, then use i2c_master_send_stop to complete writing, read from slave, compare the data. finally, use function with stop to complete the transfer.

Parameters

test	Current test case.

References i2c_master_packet::address, i2c_master_packet::data, DATA_LENGTH, i, i2c_master_instance, i2c_master_read_packet_wait(), i2c_master_read_packet_wait_no_stop(), i2c_master_write_packet_wait(), i2c_master_write_packet_wait_no_stop(), master_read_buffer, master_write_buffer, SLAVE_ADDRESS, STATUS_OK, and test_assert_true.

Referenced by main().

struct usart_module cdc_uart_module

struct i2c_master_module i2c_master_instance

static

struct i2c_slave_module i2c_slave_instance

static

uint8_t master_read_buffer[DATA_LENGTH] = {0}

static

Referenced by run_i2c_full_speed_test(), and run_i2c_master_transfer_test().

uint8_t master_write_buffer[DATA_LENGTH]

static

Initial value:

= {
        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
}

Referenced by run_i2c_full_speed_test(), and run_i2c_master_transfer_test().

uint8_t slave_buffer[DATA_LENGTH] = {0}

static

Referenced by i2c_slave_read_request_callback(), and i2c_slave_write_request_callback().

struct i2c_slave_packet slave_packet

static

Referenced by i2c_slave_read_request_callback(), and i2c_slave_write_request_callback().