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esp-idf/components/driver/test/test_i2c.c
Omar Chebib b8c6c5334f i2c: modify examples to work out of the box on ESP32S3 
On ESP32S3, the default I2C pins of the examples are already used by USB.
This commit changes the default pins.
2021-07-21 11:04:16 +08:00

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/*
* SPDX-FileCopyrightText: 2021 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 "driver/periph_ctrl.h"
#include "esp_rom_gpio.h"
#include "hal/gpio_hal.h"
#include "hal/uart_ll.h"
#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
#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
#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_RATE_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_RATE_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)
// 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_RATE_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_RATE_MS);
i2c_cmd_link_delete(cmd);
vTaskDelay(100 / portTICK_RATE_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_RATE_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_RATE_MS);
i2c_cmd_link_delete(cmd);
vTaskDelay(100 / portTICK_RATE_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_RATE_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_RATE_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_RATE_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_RATE_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)
{
xSemaphoreHandle *sema = (xSemaphoreHandle *) 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_RATE_MS);
}
free(data);
xSemaphoreGive(*sema);
vTaskDelete(NULL);
}
TEST_CASE("test i2c_slave_read_buffer is not blocked when ticks_to_wait=0", "[i2c]")
{
xSemaphoreHandle 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]")
{
xSemaphoreHandle 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);
}
}
#if !TEMPORARY_DISABLED_FOR_TARGETS(ESP32S3, ESP32C3)
//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, I2CEXT1_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)
{
const int i2c_source_clk_freq = 80000000;
const float i2c_cource_clk_period = 0.0125;
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 != 542) {
printf("\nedg_cnt != 542, test fail\n");
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 = 1;
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_RATE_MS);
i2c_cmd_link_delete(cmd);
i2c_scl_freq_cal();
free(data);
TEST_ESP_OK(i2c_driver_delete(i2c_num));
}
#endif // TEMPORARY_DISABLED_FOR_TARGETS(ESP32S3, ESP32C3)
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