1 /*
2 * Copyright (c) 2021 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/drivers/i2c.h>
8 #include <zephyr/kernel.h>
9 #include <zephyr/ztest.h>
10
11 /* command to configure port direction of NXP PCA95xx */
12 #define REG_CONF_PORT0 0x06U
13
14 /* test data used to write into registers */
15 uint8_t test_data[2] = {0xAA, 0xAA};
16
17 /**
18 * @brief Test i2c api by communicating with pca95xx
19 * @details
20 * - get i2c mainline device
21 * - write data into pca95xx
22 * - read data from pca95xx
23 * - check read data whether correct
24 */
ZTEST(boards_mec172x_pca95xx,test_i2c_pca95xx)25 ZTEST(boards_mec172x_pca95xx, test_i2c_pca95xx)
26 {
27 int32_t ret;
28 uint8_t datas[3];
29 uint32_t i2c_cfg = I2C_SPEED_SET(I2C_SPEED_STANDARD) | I2C_MODE_CONTROLLER;
30
31 /* get i2c device */
32 const struct i2c_dt_spec i2c = I2C_DT_SPEC_GET(DT_COMPAT_GET_ANY_STATUS_OKAY(nxp_pca95xx));
33
34 zassert_true(device_is_ready(i2c.bus), "I2C controller device is not ready");
35
36 /* configure i2c device */
37 ret = i2c_configure(i2c.bus, i2c_cfg);
38 zassert_true(ret == 0, "Failed to configure i2c device");
39
40 /* write configuration to register 6 and 7 of PCA95XX*/
41 (void)memset(datas, 0, 3);
42 datas[0] = REG_CONF_PORT0;
43 datas[1] = test_data[0];
44 datas[2] = test_data[1];
45 ret = i2c_write_dt(&i2c, datas, 3);
46 zassert_true(ret == 0, "Failed to write data to i2c device");
47
48 /* read configuration from register 6 and 7 */
49 (void)memset(datas, 0, 3);
50 datas[0] = REG_CONF_PORT0;
51 ret = i2c_write_dt(&i2c, datas, 1);
52 zassert_true(ret == 0, "Failed to write data to i2c device");
53
54 (void)memset(datas, 0, 3);
55 ret = i2c_read_dt(&i2c, datas, 2);
56 zassert_true(ret == 0, "Failed to read data from i2c device");
57
58 /* check read data whether correct */
59 ret = memcmp(datas, test_data, 2);
60 zassert_true(ret == 0, "Read data is different to write data");
61 }
62
63 ZTEST_SUITE(boards_mec172x_pca95xx, NULL, NULL, NULL, NULL, NULL);
64
