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/* Copyright (c) 2023, Canaan Bright Sight Co., Ltd
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 2006-2025 RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <utest.h>
#include <string.h>
#include "drv_i2c.h"
#include "drv_pinctrl.h"
#include "drv_gpio.h"
/*
* 测试K230 I2C的主从机通信，在这里采用I2C0作为测试对象
*
* 硬件平台：
* 测试的硬件平台为庐山派开发板，使用的I2C0引脚是GPIO048(SCL)
* 和GPIO049(SDA)。
*
* 测试说明：
* 1. 测试I2C0主机模式
* 主机模式下，主机向从机发送16字节数据（不包括写读地址），
* 然后再读取回来进行校验，共执行两次，分别是400kHz和1MHz速率。
* 注：使用的从机为AT24C08 EEPROM，设备地址为0x50。
*/
#define I2C_NAME "i2c0"
#define TARGET_ADDR 0x50
#define TEST_BUFFER_SIZE 16
#define I2C_SCL_PIN 48
#define I2C_SDA_PIN 49
#define I2C_SCL_PIN_AF IOMUX_FUNC4
#define I2C_SDA_PIN_AF IOMUX_FUNC4
static void test_i2c0_deinit_pin(void)
{
k230_pinctrl_set_function(I2C_SCL_PIN, IOMUX_FUNC1);
k230_pinctrl_set_function(I2C_SDA_PIN, IOMUX_FUNC1);
k230_pinctrl_set_oe(I2C_SCL_PIN, 0);
k230_pinctrl_set_oe(I2C_SDA_PIN, 0);
k230_pinctrl_set_ie(I2C_SCL_PIN, 1);
k230_pinctrl_set_ie(I2C_SDA_PIN, 1);
kd_pin_mode(I2C_SCL_PIN, GPIO_DM_INPUT);
kd_pin_mode(I2C_SDA_PIN, GPIO_DM_INPUT);
}
static void test_i2c0_init_pin(void)
{
k230_pinctrl_set_function(I2C_SCL_PIN, I2C_SCL_PIN_AF); // I2C0_SCL
k230_pinctrl_set_function(I2C_SDA_PIN, I2C_SDA_PIN_AF); // I2C0_SDA
k230_pinctrl_set_oe(I2C_SCL_PIN, 1);
k230_pinctrl_set_oe(I2C_SDA_PIN, 1);
k230_pinctrl_set_ie(I2C_SCL_PIN, 1);
k230_pinctrl_set_ie(I2C_SDA_PIN, 1);
}
static int test_i2c_check_pin(void)
{
test_i2c0_deinit_pin();
if(kd_pin_read(I2C_SCL_PIN) != 1 || kd_pin_read(I2C_SDA_PIN) != 1)
{
LOG_W("i2c bus is not idle, try to recover it.");
k230_pinctrl_set_oe(I2C_SCL_PIN, 1);
kd_pin_mode(I2C_SCL_PIN, GPIO_DM_OUTPUT);
for(rt_uint8_t i = 0; i < 9; i++)
{
kd_pin_write(I2C_SCL_PIN, 0);
rt_hw_us_delay(2);
kd_pin_write(I2C_SCL_PIN, 1);
rt_hw_us_delay(2);
}
k230_pinctrl_set_oe(I2C_SCL_PIN, 0);
kd_pin_mode(I2C_SCL_PIN, GPIO_DM_INPUT);
}
if(kd_pin_read(I2C_SCL_PIN) != 1 || kd_pin_read(I2C_SDA_PIN) != 1)
{
LOG_E("i2c bus recover failed");
return -RT_ERROR;
}
LOG_I("i2c bus(pin: %u, %u) is idle, init i2c bus pin", I2C_SCL_PIN, I2C_SDA_PIN);
test_i2c0_init_pin();
return RT_EOK;
}
static void _test_i2c0_master(rt_uint8_t *buffer_w, rt_uint8_t *buffer_r, rt_uint32_t size, rt_uint32_t speed)
{
rt_err_t ret = RT_EOK;
struct rt_i2c_bus_device *dev;
struct rt_i2c_msg msgs[2];
dev = rt_i2c_bus_device_find(I2C_NAME);
uassert_not_null(dev);
rt_i2c_control(dev, RT_I2C_DEV_CTRL_CLK, (void *)&speed);
msgs[0].addr = TARGET_ADDR;
msgs[0].flags = RT_I2C_WR;
msgs[0].buf = buffer_w;
msgs[0].len = size + 1;
if(rt_i2c_transfer(dev, msgs, 1) != 1)
{
LOG_E("i2c transfer failed");
uassert_true(0);
}
rt_thread_mdelay(10);
msgs[0].addr = TARGET_ADDR;
msgs[0].flags = RT_I2C_WR | RT_I2C_NO_STOP;
msgs[0].buf = &buffer_r[0];
msgs[0].len = 1;
msgs[1].addr = TARGET_ADDR;
msgs[1].flags = RT_I2C_RD | RT_I2C_NO_START;
msgs[1].buf = &buffer_r[1];
msgs[1].len = size;
if(rt_i2c_transfer(dev, msgs, 2) != 2)
{
LOG_E("i2c transfer failed");
uassert_true(0);
}
LOG_I("Read data:\n");
for(rt_uint8_t i = 1; i < size + 1; i++)
{
LOG_I("0x%02X ", buffer_r[i]);
}
uassert_buf_equal(buffer_w + 1, buffer_r + 1, size);
}
static void test_i2c0_master(void)
{
rt_uint8_t buffer_w[TEST_BUFFER_SIZE + 1];
rt_uint8_t buffer_r[TEST_BUFFER_SIZE + 1];
rt_uint32_t size = TEST_BUFFER_SIZE;
rt_uint32_t speed = 400000; // 400kHz
memset(buffer_w + 1, 0xAA, TEST_BUFFER_SIZE);
buffer_w[0] = 0x00; // memory address
memset(buffer_r, 0x00, TEST_BUFFER_SIZE + 1);
_test_i2c0_master(buffer_w, buffer_r, size, speed);
speed = 1000000; // 1MHz
memset(buffer_w + 1, 0x55, TEST_BUFFER_SIZE);
buffer_w[0] = 0x00; // memory address
memset(buffer_r, 0x00, TEST_BUFFER_SIZE + 1);
_test_i2c0_master(buffer_w, buffer_r, size, speed);
}
static void testcase(void)
{
LOG_I("This is a i2c test case.\n");
UTEST_UNIT_RUN(test_i2c0_master);
}
static rt_err_t utest_tc_init(void)
{
return test_i2c_check_pin();
}
static rt_err_t utest_tc_cleanup(void)
{
LOG_I("i2c bus pin deinit.\n");
test_i2c0_deinit_pin();
return RT_EOK;
}
UTEST_TC_EXPORT(testcase, "bsp.k230.drivers.i2c", utest_tc_init, utest_tc_cleanup, 100);
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