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esp-idf/components/driver/test/test_i2c.c

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27 KiB
C
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/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* test environment UT_T2_I2C:
* please prepare two ESP32-WROVER-KIT board.
* Then connect GPIO18 and GPIO18, GPIO19 and GPIO19 between these two boards.
*/
#include <stdio.h>
#include <string.h>
#include "unity.h"
#include "test_utils.h"
#include "unity_config.h"
#include "driver/i2c.h"
#include "esp_attr.h"
#include "esp_log.h"
#include "soc/gpio_periph.h"
#include "soc/i2c_periph.h"
#include "esp_system.h"
#include "soc/uart_struct.h"
#include "esp_private/periph_ctrl.h"
#include "esp_rom_gpio.h"
#include "hal/gpio_hal.h"
#include "hal/uart_ll.h"
#if SOC_I2C_SUPPORT_SLAVE // i2c test can't work without slave
#define DATA_LENGTH 512 /*!<Data buffer length for test buffer*/
#define RW_TEST_LENGTH 129 /*!<Data length for r/w test, any value from 0-DATA_LENGTH*/
#define DELAY_TIME_BETWEEN_ITEMS_MS 1234 /*!< delay time between different test items */
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3 || CONFIG_IDF_TARGET_ESP32H2
#define I2C_SLAVE_SCL_IO 5 /*!<gpio number for i2c slave clock */
#define I2C_SLAVE_SDA_IO 6 /*!<gpio number for i2c slave data */
#else
#define I2C_SLAVE_SCL_IO 19 /*!<gpio number for i2c slave clock */
#define I2C_SLAVE_SDA_IO 18 /*!<gpio number for i2c slave data */
#endif
#define I2C_SLAVE_NUM I2C_NUM_0 /*!<I2C port number for slave dev */
#define I2C_SLAVE_TX_BUF_LEN (2*DATA_LENGTH) /*!<I2C slave tx buffer size */
#define I2C_SLAVE_RX_BUF_LEN (2*DATA_LENGTH) /*!<I2C slave rx buffer size */
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32H2
#define I2C_MASTER_SCL_IO 5 /*!<gpio number for i2c master clock */
#define I2C_MASTER_SDA_IO 6 /*!<gpio number for i2c master data */
#elif CONFIG_IDF_TARGET_ESP32S3
#define I2C_MASTER_SCL_IO 2 /*!<gpio number for i2c master clock */
#define I2C_MASTER_SDA_IO 1 /*!<gpio number for i2c master data */
#else
#define I2C_MASTER_SCL_IO 19 /*!< gpio number for I2C master clock */
#define I2C_MASTER_SDA_IO 18 /*!< gpio number for I2C master data */
#endif
#define I2C_MASTER_NUM I2C_NUM_0 /*!< I2C port number for master dev */
#define I2C_MASTER_TX_BUF_DISABLE 0 /*!< I2C master do not need buffer */
#define I2C_MASTER_RX_BUF_DISABLE 0 /*!< I2C master do not need buffer */
#define I2C_MASTER_FREQ_HZ 100000 /*!< I2C master clock frequency */
#define ESP_SLAVE_ADDR 0x28 /*!< ESP32 slave address, you can set any 7bit value */
#define WRITE_BIT I2C_MASTER_WRITE /*!< I2C master write */
#define READ_BIT I2C_MASTER_READ /*!< I2C master read */
#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave*/
#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
#define ACK_VAL 0x0 /*!< I2C ack value */
#define NACK_VAL 0x1 /*!< I2C nack value */
#define PULSE_IO 19
#define PCNT_INPUT_IO 4
#define PCNT_CTRL_FLOATING_IO 5
#define HIGHEST_LIMIT 10000
#define LOWEST_LIMIT -10000
static DRAM_ATTR i2c_dev_t *const I2C[SOC_I2C_NUM] = { &I2C0,
#if SOC_I2C_NUM > 1
&I2C1,
#endif
};
static esp_err_t i2c_master_write_slave(i2c_port_t i2c_num, uint8_t *data_wr, size_t size)
{
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
TEST_ESP_OK(i2c_master_write_byte(cmd, ( ESP_SLAVE_ADDR << 1 ) | WRITE_BIT, ACK_CHECK_EN));
TEST_ESP_OK(i2c_master_write(cmd, data_wr, size, ACK_CHECK_EN));
TEST_ESP_OK(i2c_master_stop(cmd));
esp_err_t ret = i2c_master_cmd_begin(i2c_num, cmd, 5000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
return ret;
}
static i2c_config_t i2c_master_init(void)
{
i2c_config_t conf_master = {
.mode = I2C_MODE_MASTER,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_MASTER_FREQ_HZ,
.sda_io_num = I2C_MASTER_SDA_IO,
.scl_io_num = I2C_MASTER_SCL_IO,
.clk_flags = 0,
};
return conf_master;
}
static i2c_config_t i2c_slave_init(void)
{
i2c_config_t conf_slave = {
.mode = I2C_MODE_SLAVE,
.sda_io_num = I2C_SLAVE_SDA_IO,
.scl_io_num = I2C_SLAVE_SCL_IO,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.slave.addr_10bit_en = 0,
.slave.slave_addr = ESP_SLAVE_ADDR,
};
return conf_slave;
}
TEST_CASE("I2C i2c_set_pin() fails if sda and scl gpios are same", "[i2c]")
{
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, i2c_set_pin(0, 0, 0, true, true , I2C_MODE_SLAVE));
}
TEST_CASE("I2C config test", "[i2c]")
{
// master test
i2c_config_t conf_master = i2c_master_init();
gpio_pullup_t sda_pull_up_en[2] = {GPIO_PULLUP_DISABLE, GPIO_PULLUP_ENABLE};
gpio_pullup_t scl_pull_up_en[2] = {GPIO_PULLUP_DISABLE, GPIO_PULLUP_ENABLE};
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
conf_master.sda_pullup_en = sda_pull_up_en[i];
conf_master.scl_pullup_en = scl_pull_up_en[j];
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ASSERT_EQUAL_INT32(I2C[I2C_MASTER_NUM]->ctr.ms_mode, 1);
TEST_ESP_OK(i2c_driver_delete(I2C_MASTER_NUM));
}
}
// slave test
i2c_config_t conf_slave = i2c_slave_init();
for (int i = 0; i < 2; i++) {
for (int j = 0; j < 2; j++) {
conf_slave.sda_pullup_en = sda_pull_up_en[i];
conf_slave.scl_pullup_en = scl_pull_up_en[j];
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
TEST_ASSERT_EQUAL_INT32(I2C[I2C_SLAVE_NUM] -> ctr.ms_mode, 0);
TEST_ESP_OK(i2c_driver_delete(I2C_SLAVE_NUM));
}
}
}
TEST_CASE("I2C set and get period test", "[i2c]")
{
int high_period, low_period;
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ESP_OK(i2c_set_period(I2C_MASTER_NUM, I2C_SCL_HIGH_PERIOD_V, I2C_SCL_HIGH_PERIOD_V));
TEST_ESP_OK(i2c_get_period(I2C_MASTER_NUM, &high_period, &low_period));
TEST_ASSERT_EQUAL_INT(I2C_SCL_HIGH_PERIOD_V, high_period);
TEST_ASSERT_EQUAL_INT(I2C_SCL_HIGH_PERIOD_V, low_period);
TEST_ASSERT_NOT_NULL((void *)i2c_set_period(I2C_MASTER_NUM, I2C_SCL_HIGH_PERIOD_V + 1, I2C_SCL_HIGH_PERIOD_V + 1));
TEST_ESP_OK(i2c_set_period(I2C_MASTER_NUM, 300, 400));
TEST_ESP_OK(i2c_get_period(I2C_MASTER_NUM, &high_period, &low_period));
TEST_ASSERT_EQUAL_INT(300, high_period);
TEST_ASSERT_EQUAL_INT(400, low_period);
TEST_ESP_OK(i2c_driver_delete(I2C_MASTER_NUM));
}
TEST_CASE("I2C config FIFO test", "[i2c]")
{
i2c_config_t conf_slave = i2c_slave_init();
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
TEST_ASSERT_BIT_LOW(1, I2C[I2C_SLAVE_NUM]->fifo_conf.tx_fifo_rst);
TEST_ESP_OK(i2c_reset_tx_fifo(I2C_SLAVE_NUM));
TEST_ASSERT_BIT_LOW(0, I2C[I2C_SLAVE_NUM]->fifo_conf.tx_fifo_rst);
TEST_ESP_OK(i2c_reset_rx_fifo(I2C_SLAVE_NUM));
TEST_ASSERT_BIT_LOW(0, I2C[I2C_SLAVE_NUM]->fifo_conf.rx_fifo_rst);
TEST_ESP_OK(i2c_driver_delete(I2C_SLAVE_NUM));
}
TEST_CASE("I2C timing test", "[i2c]")
{
int test_setup_time, test_data_time, test_stop_time, test_hold_time;
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ESP_OK(i2c_set_start_timing(I2C_MASTER_NUM, 50, 60));
TEST_ESP_OK(i2c_set_data_timing(I2C_MASTER_NUM, 80, 60));
TEST_ESP_OK(i2c_set_stop_timing(I2C_MASTER_NUM, 100, 60));
for (int i = 0; i < DATA_LENGTH; i++) {
data_wr[i] = i;
}
i2c_master_write_slave(I2C_MASTER_NUM, data_wr, RW_TEST_LENGTH);
TEST_ESP_OK(i2c_get_start_timing(I2C_MASTER_NUM, &test_setup_time, &test_hold_time));
TEST_ESP_OK(i2c_get_data_timing(I2C_MASTER_NUM, &test_data_time, &test_hold_time));
TEST_ESP_OK(i2c_get_stop_timing(I2C_MASTER_NUM, &test_stop_time, &test_hold_time));
TEST_ASSERT_EQUAL_INT32(50, test_setup_time);
TEST_ASSERT_EQUAL_INT32(80, test_data_time);
TEST_ASSERT_EQUAL_INT32(100, test_stop_time);
TEST_ASSERT_EQUAL_INT32(60, test_hold_time);
free(data_wr);
i2c_driver_delete(I2C_MASTER_NUM);
}
TEST_CASE("I2C data mode test", "[i2c]")
{
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
i2c_trans_mode_t test_tx_trans_mode, test_rx_trans_mode;
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
for (int i = 0; i < DATA_LENGTH; i++) {
data_wr[i] = i;
}
TEST_ESP_OK(i2c_set_data_mode(I2C_MASTER_NUM, I2C_DATA_MODE_LSB_FIRST, I2C_DATA_MODE_LSB_FIRST));
TEST_ESP_OK(i2c_get_data_mode(I2C_MASTER_NUM, &test_tx_trans_mode, &test_rx_trans_mode));
TEST_ASSERT_EQUAL_INT(I2C_DATA_MODE_LSB_FIRST, test_tx_trans_mode);
TEST_ASSERT_EQUAL_INT(I2C_DATA_MODE_LSB_FIRST, test_rx_trans_mode);
i2c_master_write_slave(I2C_MASTER_NUM, data_wr, RW_TEST_LENGTH);
TEST_ESP_OK(i2c_set_data_mode(I2C_MASTER_NUM, I2C_DATA_MODE_MSB_FIRST, I2C_DATA_MODE_MSB_FIRST));
TEST_ESP_OK(i2c_get_data_mode(I2C_MASTER_NUM, &test_tx_trans_mode, &test_rx_trans_mode));
TEST_ASSERT_EQUAL_INT(I2C_DATA_MODE_MSB_FIRST, test_tx_trans_mode);
TEST_ASSERT_EQUAL_INT(I2C_DATA_MODE_MSB_FIRST, test_rx_trans_mode);
i2c_master_write_slave(I2C_MASTER_NUM, data_wr, RW_TEST_LENGTH);
free(data_wr);
i2c_driver_delete(I2C_MASTER_NUM);
}
TEST_CASE("I2C driver memory leaking check", "[i2c]")
{
esp_err_t ret;
int size = esp_get_free_heap_size();
for (uint32_t i = 0; i <= 1000; i++) {
ret = i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0);
TEST_ASSERT(ret == ESP_OK);
vTaskDelay(10 / portTICK_PERIOD_MS);
i2c_driver_delete(I2C_SLAVE_NUM);
TEST_ASSERT(ret == ESP_OK);
}
TEST_ASSERT_INT_WITHIN(100, size, esp_get_free_heap_size());
}
#if !TEMPORARY_DISABLED_FOR_TARGETS(ESP32S2, ESP32S3, ESP32C2)
// print the reading buffer
static void disp_buf(uint8_t *buf, int len)
{
int i;
for (i = 0; i < len; i++) {
printf("%02x ", buf[i]);
if (( i + 1 ) % 16 == 0) {
printf("\n");
}
}
printf("\n");
}
static void i2c_master_write_test(void)
{
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
int i;
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
unity_wait_for_signal("i2c slave init finish");
unity_send_signal("master write");
for (i = 0; i < DATA_LENGTH / 2; i++) {
data_wr[i] = i;
}
i2c_master_write_slave(I2C_MASTER_NUM, data_wr, DATA_LENGTH / 2);
disp_buf(data_wr, i + 1);
free(data_wr);
unity_wait_for_signal("ready to delete");
TEST_ESP_OK(i2c_driver_delete(I2C_MASTER_NUM));
}
static void i2c_slave_read_test(void)
{
uint8_t *data_rd = (uint8_t *) malloc(DATA_LENGTH);
int size_rd = 0;
int len = 0;
i2c_config_t conf_slave = i2c_slave_init();
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
unity_send_signal("i2c slave init finish");
unity_wait_for_signal("master write");
while (1) {
len = i2c_slave_read_buffer( I2C_SLAVE_NUM, data_rd + size_rd, DATA_LENGTH, 10000 / portTICK_PERIOD_MS);
if (len == 0) {
break;
}
size_rd += len;
}
disp_buf(data_rd, size_rd);
for (int i = 0; i < size_rd; i++) {
TEST_ASSERT(data_rd[i] == i);
}
free(data_rd);
unity_send_signal("ready to delete");
TEST_ESP_OK(i2c_driver_delete(I2C_SLAVE_NUM));
}
TEST_CASE_MULTIPLE_DEVICES("I2C master write slave test", "[i2c][test_env=UT_T2_I2C][timeout=150]", i2c_master_write_test, i2c_slave_read_test);
static void master_read_slave_test(void)
{
uint8_t *data_rd = (uint8_t *) malloc(DATA_LENGTH);
memset(data_rd, 0, DATA_LENGTH);
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
unity_wait_for_signal("i2c slave init finish");
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, ( ESP_SLAVE_ADDR << 1 ) | READ_BIT, ACK_CHECK_EN);
unity_send_signal("slave write");
unity_wait_for_signal("master read");
i2c_master_read(cmd, data_rd, RW_TEST_LENGTH-1, ACK_VAL);
i2c_master_read_byte(cmd, data_rd + RW_TEST_LENGTH-1, NACK_VAL);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 5000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
vTaskDelay(100 / portTICK_PERIOD_MS);
for (int i = 0; i < RW_TEST_LENGTH; i++) {
printf("%d\n", data_rd[i]);
TEST_ASSERT(data_rd[i]==i);
}
free(data_rd);
unity_send_signal("ready to delete");
i2c_driver_delete(I2C_MASTER_NUM);
}
static void slave_write_buffer_test(void)
{
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
int size_rd;
i2c_config_t conf_slave = i2c_slave_init();
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
unity_send_signal("i2c slave init finish");
unity_wait_for_signal("slave write");
for (int i = 0; i < DATA_LENGTH / 2; i++) {
data_wr[i] = i;
}
size_rd = i2c_slave_write_buffer(I2C_SLAVE_NUM, data_wr, RW_TEST_LENGTH, 2000 / portTICK_PERIOD_MS);
disp_buf(data_wr, size_rd);
unity_send_signal("master read");
unity_wait_for_signal("ready to delete");
free(data_wr);
i2c_driver_delete(I2C_SLAVE_NUM);
}
TEST_CASE_MULTIPLE_DEVICES("I2C master read slave test", "[i2c][test_env=UT_T2_I2C][timeout=150]", master_read_slave_test, slave_write_buffer_test);
#if !TEMPORARY_DISABLED_FOR_TARGETS(ESP32S2, ESP32)
static void i2c_master_write_read_test(void)
{
uint8_t *data_rd = (uint8_t *) malloc(DATA_LENGTH);
memset(data_rd, 0, DATA_LENGTH);
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
unity_wait_for_signal("i2c slave init finish");
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write_byte(cmd, ( ESP_SLAVE_ADDR << 1 ) | READ_BIT, ACK_CHECK_EN);
unity_send_signal("slave write");
unity_wait_for_signal("master read and write");
i2c_master_read(cmd, data_rd, RW_TEST_LENGTH, ACK_VAL);
i2c_master_read_byte(cmd, data_rd + RW_TEST_LENGTH, NACK_VAL);
i2c_master_stop(cmd);
i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 5000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
vTaskDelay(100 / portTICK_PERIOD_MS);
disp_buf(data_rd, RW_TEST_LENGTH);
for (int i = 0; i < RW_TEST_LENGTH; i++) {
TEST_ASSERT(data_rd[i] == i/2);
}
for (int i = 0; i < DATA_LENGTH; i++) {
data_wr[i] = i % 3;
}
vTaskDelay(100 / portTICK_PERIOD_MS);
i2c_master_write_slave(I2C_MASTER_NUM, data_wr, RW_TEST_LENGTH);
free(data_wr);
free(data_rd);
unity_send_signal("slave read");
unity_wait_for_signal("ready to delete");
i2c_driver_delete(I2C_MASTER_NUM);
}
static void i2c_slave_read_write_test(void)
{
uint8_t *data_rd = (uint8_t *) malloc(DATA_LENGTH);
memset(data_rd, 0, DATA_LENGTH);
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
int size_rd;
i2c_config_t conf_slave = i2c_slave_init();
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
unity_send_signal("i2c slave init finish");
unity_wait_for_signal("slave write");
for (int i = 0; i < DATA_LENGTH / 2; i++) {
data_wr[i] = i/2;
}
size_rd = i2c_slave_write_buffer(I2C_SLAVE_NUM, data_wr, RW_TEST_LENGTH, 2000 / portTICK_PERIOD_MS);
disp_buf(data_wr, size_rd);
unity_send_signal("master read and write");
unity_wait_for_signal("slave read");
size_rd = i2c_slave_read_buffer( I2C_SLAVE_NUM, data_rd, RW_TEST_LENGTH, 1000 / portTICK_PERIOD_MS);
printf("slave read data is:\n");
disp_buf(data_rd, size_rd);
for (int i = 0; i < RW_TEST_LENGTH; i++) {
TEST_ASSERT(data_rd[i] == i % 3);
}
free(data_wr);
free(data_rd);
unity_send_signal("ready to delete");
i2c_driver_delete(I2C_SLAVE_NUM);
}
TEST_CASE_MULTIPLE_DEVICES("I2C read and write test", "[i2c][test_env=UT_T2_I2C][timeout=150]", i2c_master_write_read_test, i2c_slave_read_write_test);
static void i2c_master_repeat_write(void)
{
uint8_t *data_wr = (uint8_t *) malloc(DATA_LENGTH);
int times = 3;
i2c_config_t conf_master = i2c_master_init();
TEST_ESP_OK(i2c_param_config(I2C_MASTER_NUM, &conf_master));
TEST_ESP_OK(i2c_driver_install(I2C_MASTER_NUM, I2C_MODE_MASTER,
I2C_MASTER_RX_BUF_DISABLE,
I2C_MASTER_TX_BUF_DISABLE, 0));
unity_wait_for_signal("i2c slave init finish");
for (int j = 0; j < times; j++) {
for (int i = 0; i < DATA_LENGTH; i++) {
data_wr[i] = j + i;
}
i2c_master_write_slave(I2C_MASTER_NUM, data_wr, RW_TEST_LENGTH);
disp_buf(data_wr, RW_TEST_LENGTH);
}
free(data_wr);
unity_send_signal("master write");
unity_wait_for_signal("ready to delete");
i2c_driver_delete(I2C_MASTER_NUM);
}
static void i2c_slave_repeat_read(void)
{
int size_rd = 0;
int times = 3;
uint8_t *data_rd = (uint8_t *) malloc(DATA_LENGTH * 3);
i2c_config_t conf_slave = i2c_slave_init();
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
unity_send_signal("i2c slave init finish");
unity_wait_for_signal("master write");
while (1) {
int len = i2c_slave_read_buffer( I2C_SLAVE_NUM, data_rd + size_rd, RW_TEST_LENGTH * 3, 10000 / portTICK_PERIOD_MS);
if (len == 0) {
break;
}
size_rd += len;
}
disp_buf(data_rd, size_rd);
for (int j = 0; j < times; j++) {
for (int i = 0; i < RW_TEST_LENGTH; i++) {
printf("data: %d, %d\n", data_rd[j * RW_TEST_LENGTH + i], (i % 129 + j));
TEST_ASSERT(data_rd[j * RW_TEST_LENGTH + i] == (i % 129 + j));
}
}
free(data_rd);
unity_send_signal("ready to delete");
i2c_driver_delete(I2C_SLAVE_NUM);
}
TEST_CASE_MULTIPLE_DEVICES("I2C repeat write test", "[i2c][test_env=UT_T2_I2C][timeout=150]", i2c_master_repeat_write, i2c_slave_repeat_read);
#endif //!TEMPORARY_DISABLED_FOR_TARGETS(ESP32S2, ESP32S3)
#endif //!TEMPORARY_DISABLED_FOR_TARGETS(ESP32S2, ESP32S3)
static volatile bool exit_flag;
static bool test_read_func;
static void test_task(void *pvParameters)
{
SemaphoreHandle_t *sema = (SemaphoreHandle_t *) pvParameters;
uint8_t *data = (uint8_t *) malloc(DATA_LENGTH);
i2c_config_t conf_slave = i2c_slave_init();
TEST_ESP_OK(i2c_driver_install(I2C_SLAVE_NUM, I2C_MODE_SLAVE,
I2C_SLAVE_RX_BUF_LEN,
I2C_SLAVE_TX_BUF_LEN, 0));
TEST_ESP_OK(i2c_param_config( I2C_SLAVE_NUM, &conf_slave));
while (exit_flag == false) {
if (test_read_func) {
i2c_slave_read_buffer(I2C_SLAVE_NUM, data, DATA_LENGTH, 0);
} else {
i2c_slave_write_buffer(I2C_SLAVE_NUM, data, DATA_LENGTH, 0);
}
vTaskDelay(10/portTICK_PERIOD_MS);
}
free(data);
xSemaphoreGive(*sema);
vTaskDelete(NULL);
}
TEST_CASE("test i2c_slave_read_buffer is not blocked when ticks_to_wait=0", "[i2c]")
{
SemaphoreHandle_t exit_sema = xSemaphoreCreateBinary();
exit_flag = false;
test_read_func = true;
xTaskCreate(test_task, "tsk1", 2048, &exit_sema, 5, NULL);
printf("Waiting for 5 sec\n");
vTaskDelay(5000 / portTICK_PERIOD_MS);
exit_flag = true;
if (xSemaphoreTake(exit_sema, 1000 / portTICK_PERIOD_MS) == pdTRUE) {
vSemaphoreDelete(exit_sema);
} else {
TEST_FAIL_MESSAGE("i2c_slave_read_buffer is blocked");
}
TEST_ESP_OK(i2c_driver_delete(I2C_SLAVE_NUM));
}
TEST_CASE("test i2c_slave_write_buffer is not blocked when ticks_to_wait=0", "[i2c]")
{
SemaphoreHandle_t exit_sema = xSemaphoreCreateBinary();
exit_flag = false;
test_read_func = false;
xTaskCreate(test_task, "tsk1", 2048, &exit_sema, 5, NULL);
printf("Waiting for 5 sec\n");
vTaskDelay(5000 / portTICK_PERIOD_MS);
exit_flag = true;
if (xSemaphoreTake(exit_sema, 1000 / portTICK_PERIOD_MS) == pdTRUE) {
vSemaphoreDelete(exit_sema);
} else {
TEST_FAIL_MESSAGE("i2c_slave_write_buffer is blocked");
}
TEST_ESP_OK(i2c_driver_delete(I2C_SLAVE_NUM));
}
TEST_CASE("I2C general API test", "[i2c]")
{
#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
#define I2C_TEST_TIME 0x3ff
#else
#define I2C_TEST_TIME 0x1f
#endif
const int i2c_num = 0;
i2c_config_t conf_master = {
.mode = I2C_MODE_MASTER,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = I2C_MASTER_FREQ_HZ,
.sda_io_num = I2C_MASTER_SDA_IO,
.scl_io_num = I2C_MASTER_SCL_IO,
};
TEST_ESP_OK(i2c_param_config( i2c_num, &conf_master));
int time_get0, time_get1;
for(int i = 10; i < I2C_TEST_TIME; i++) {
//set period test
TEST_ESP_OK(i2c_set_period(i2c_num, i, i));
TEST_ESP_OK(i2c_get_period(i2c_num, &time_get0, &time_get1));
TEST_ASSERT((time_get0 == i) && (time_get1 == i));
//set start timing test
TEST_ESP_OK(i2c_set_start_timing(i2c_num, i, i));
TEST_ESP_OK(i2c_get_start_timing(i2c_num, &time_get0, &time_get1));
TEST_ASSERT((time_get0 == i) && (time_get1 == i));
//set stop timing test
TEST_ESP_OK(i2c_set_stop_timing(i2c_num, i, i));
TEST_ESP_OK(i2c_get_stop_timing(i2c_num, &time_get0, &time_get1));
TEST_ASSERT((time_get0 == i) && (time_get1 == i));
//set data timing test
TEST_ESP_OK(i2c_set_data_timing(i2c_num, i, i));
TEST_ESP_OK(i2c_get_data_timing(i2c_num, &time_get0, &time_get1));
TEST_ASSERT((time_get0 == i) && (time_get1 == i));
//set time out test
TEST_ESP_OK(i2c_set_timeout(i2c_num, i));
TEST_ESP_OK(i2c_get_timeout(i2c_num, &time_get0));
TEST_ASSERT(time_get0 == i);
}
}
//Init uart baud rate detection
static void uart_aut_baud_det_init(int rxd_io_num)
{
gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[rxd_io_num], PIN_FUNC_GPIO);
gpio_set_direction(rxd_io_num, GPIO_MODE_INPUT_OUTPUT);
esp_rom_gpio_connect_out_signal(rxd_io_num, I2CEXT0_SCL_OUT_IDX, 0, 0);
esp_rom_gpio_connect_in_signal(rxd_io_num, U1RXD_IN_IDX, 0);
periph_module_enable(PERIPH_UART1_MODULE);
/* Reset all the bits */
uart_ll_disable_intr_mask(&UART1, ~0);
uart_ll_clr_intsts_mask(&UART1, ~0);
uart_ll_set_autobaud_en(&UART1, true);
}
//Calculate I2C scl freq
static void i2c_scl_freq_cal(void)
{
#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2
const int i2c_source_clk_freq = 80000000;
const float i2c_cource_clk_period = 0.0125;
int expt_cnt = 542;
#else
const int i2c_source_clk_freq = 18000000; // Clock sorce: RTC
const float i2c_cource_clk_period = 0.056;
int expt_cnt = 540;
#endif
int edg_cnt = uart_ll_get_rxd_edge_cnt(&UART1);
int pospulse_cnt = uart_ll_get_pos_pulse_cnt(&UART1);
int negpulse_cnt = uart_ll_get_neg_pulse_cnt(&UART1);
int high_period_cnt = uart_ll_get_high_pulse_cnt(&UART1);
int low_period_cnt = uart_ll_get_low_pulse_cnt(&UART1);
if(edg_cnt != expt_cnt) {
printf("\nedg_cnt != %d, test fail\n", expt_cnt);
return;
}
printf("\nDetected SCL frequency: %d Hz\n", i2c_source_clk_freq / ((pospulse_cnt + negpulse_cnt) / 2) );
printf("\nSCL high period %.3f (us), SCL low_period %.3f (us)\n\n", (float)(i2c_cource_clk_period * high_period_cnt), (float)(i2c_cource_clk_period * low_period_cnt));
uart_ll_set_autobaud_en(&UART1, false);
periph_module_disable(PERIPH_UART1_MODULE);
}
TEST_CASE("I2C SCL freq test (local test)", "[i2c][ignore]")
{
//Use the UART baud rate detection function to detect the I2C SCL frequency.
const int i2c_num = 0;
const int uart1_rxd_io = 5;
i2c_config_t conf_master = {
.mode = I2C_MODE_MASTER,
.sda_pullup_en = GPIO_PULLUP_ENABLE,
.scl_pullup_en = GPIO_PULLUP_ENABLE,
.master.clk_speed = 400000,
.sda_io_num = I2C_MASTER_SDA_IO,
.scl_io_num = I2C_MASTER_SCL_IO,
};
uint8_t *data = (uint8_t *)malloc(30);
TEST_ESP_OK(i2c_param_config( i2c_num, &conf_master));
TEST_ESP_OK(i2c_driver_install(i2c_num, I2C_MODE_MASTER, 0, 0, 0));
memset(data, 0, 0);
uart_aut_baud_det_init(uart1_rxd_io);
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
i2c_master_start(cmd);
i2c_master_write(cmd, data, 30, ACK_CHECK_DIS);
i2c_master_stop(cmd);
i2c_master_cmd_begin(i2c_num, cmd, 5000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(cmd);
i2c_scl_freq_cal();
free(data);
TEST_ESP_OK(i2c_driver_delete(i2c_num));
}
#endif // SOC_I2C_SUPPORT_SLAVE
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