diff --git a/components/driver/test_apps/legacy_timer_driver/CMakeLists.txt b/components/driver/test_apps/legacy_timer_driver/CMakeLists.txt
new file mode 100644
index 0000000000..f73bf63842
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/CMakeLists.txt
@@ -0,0 +1,5 @@
+# This is the project CMakeLists.txt file for the test subproject
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(legacy_timer_driver_test)
diff --git a/components/driver/test_apps/legacy_timer_driver/README.md b/components/driver/test_apps/legacy_timer_driver/README.md
new file mode 100644
index 0000000000..3f7a0a04f0
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/README.md
@@ -0,0 +1,2 @@
+| Supported Targets | ESP32 | ESP32-S2 | ESP32-S3 | ESP32-C3 |
+| ----------------- | ----- | -------- | -------- | -------- |
diff --git a/components/driver/test_apps/legacy_timer_driver/app_test.py b/components/driver/test_apps/legacy_timer_driver/app_test.py
new file mode 100644
index 0000000000..af6e79ba47
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/app_test.py
@@ -0,0 +1,30 @@
+# SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
+import glob
+import os
+
+import ttfw_idf
+from tiny_test_fw import Utility
+
+
+@ttfw_idf.idf_component_unit_test(env_tag='COMPONENT_UT_GENERIC', target=['esp32', 'esp32s2', 'esp32s3', 'esp32c3'])
+def test_component_ut_legacy_timer_driver(env, _):  # type: (ttfw_idf.TinyFW.Env, None) -> None
+    # Get the names of all configs (sdkconfig.ci.* files)
+    config_files = glob.glob(os.path.join(os.path.dirname(__file__), 'sdkconfig.ci.*'))
+    config_names = [os.path.basename(s).replace('sdkconfig.ci.', '') for s in config_files]
+
+    # Run test once with binaries built for each config
+    for name in config_names:
+        Utility.console_log(f'Checking config "{name}"... ', end='')
+        dut = env.get_dut('gptimer', 'components/driver/test_apps/legacy_timer_driver', app_config_name=name)
+        dut.start_app()
+        stdout = dut.expect('Press ENTER to see the list of tests', full_stdout=True)
+        dut.write('*')
+        stdout = dut.expect("Enter next test, or 'enter' to see menu", full_stdout=True, timeout=80)
+        ttfw_idf.ComponentUTResult.parse_result(stdout,ttfw_idf.TestFormat.UNITY_BASIC)
+        env.close_dut(dut.name)
+        Utility.console_log(f'Test config "{name}" done')
+
+
+if __name__ == '__main__':
+    test_component_ut_legacy_timer_driver()
diff --git a/components/driver/test_apps/legacy_timer_driver/main/CMakeLists.txt b/components/driver/test_apps/legacy_timer_driver/main/CMakeLists.txt
new file mode 100644
index 0000000000..5dbc1ada23
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/main/CMakeLists.txt
@@ -0,0 +1,7 @@
+set(srcs "test_app_main.c"
+         "test_legacy_timer.c")
+
+idf_component_register(SRCS ${srcs}
+                       PRIV_REQUIRES driver unity)
+
+target_link_libraries(${COMPONENT_LIB} INTERFACE "-u test_app_include_legacy_timer")
diff --git a/components/driver/test_apps/legacy_timer_driver/main/test_app_main.c b/components/driver/test_apps/legacy_timer_driver/main/test_app_main.c
new file mode 100644
index 0000000000..183a88ae3c
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/main/test_app_main.c
@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "unity.h"
+#include "unity_test_runner.h"
+#include "esp_heap_caps.h"
+
+#define TEST_MEMORY_LEAK_THRESHOLD (-600)
+
+static size_t before_free_8bit;
+static size_t before_free_32bit;
+
+static void check_leak(size_t before_free, size_t after_free, const char *type)
+{
+    ssize_t delta = after_free - before_free;
+    printf("MALLOC_CAP_%s: Before %u bytes free, After %u bytes free (delta %d)\n", type, before_free, after_free, delta);
+    TEST_ASSERT_MESSAGE(delta >= TEST_MEMORY_LEAK_THRESHOLD, "memory leak");
+}
+
+void setUp(void)
+{
+    before_free_8bit = heap_caps_get_free_size(MALLOC_CAP_8BIT);
+    before_free_32bit = heap_caps_get_free_size(MALLOC_CAP_32BIT);
+}
+
+void tearDown(void)
+{
+    size_t after_free_8bit = heap_caps_get_free_size(MALLOC_CAP_8BIT);
+    size_t after_free_32bit = heap_caps_get_free_size(MALLOC_CAP_32BIT);
+    check_leak(before_free_8bit, after_free_8bit, "8BIT");
+    check_leak(before_free_32bit, after_free_32bit, "32BIT");
+}
+
+void app_main(void)
+{
+    unity_run_menu();
+}
diff --git a/components/driver/test_apps/legacy_timer_driver/main/test_legacy_timer.c b/components/driver/test_apps/legacy_timer_driver/main/test_legacy_timer.c
new file mode 100644
index 0000000000..f2e5eabad3
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/main/test_legacy_timer.c
@@ -0,0 +1,1013 @@
+/*
+ * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+#include <stdio.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "freertos/queue.h"
+#include "esp_system.h"
+#include "unity.h"
+#include "driver/timer.h"
+#include "soc/rtc.h"
+#include "soc/soc_caps.h"
+#include "esp_rom_sys.h"
+
+#define TEST_TIMER_RESOLUTION_HZ 1000000 // 1MHz resolution
+#define TIMER_DELTA              0.001
+
+static bool alarm_flag;
+static QueueHandle_t timer_queue;
+
+typedef struct {
+    timer_group_t timer_group;
+    timer_idx_t timer_idx;
+} timer_info_t;
+
+typedef struct {
+    timer_autoreload_t type;  // the type of timer's event
+    timer_group_t timer_group;
+    timer_idx_t timer_idx;
+    uint64_t timer_counter_value;
+} timer_event_t;
+
+#define TIMER_INFO_INIT(TG, TID)    {.timer_group = (TG), .timer_idx = (TID),}
+
+static timer_info_t timer_info[] = {
+#if SOC_TIMER_GROUP_TOTAL_TIMERS >= 4
+    TIMER_INFO_INIT(TIMER_GROUP_0, TIMER_0),
+    TIMER_INFO_INIT(TIMER_GROUP_0, TIMER_1),
+    TIMER_INFO_INIT(TIMER_GROUP_1, TIMER_0),
+    TIMER_INFO_INIT(TIMER_GROUP_1, TIMER_1),
+#elif SOC_TIMER_GROUP_TOTAL_TIMERS >= 2
+    TIMER_INFO_INIT(TIMER_GROUP_0, TIMER_0),
+    TIMER_INFO_INIT(TIMER_GROUP_1, TIMER_0),
+#else
+    TIMER_INFO_INIT(TIMER_GROUP_0, TIMER_0),
+#endif
+};
+
+static intr_handle_t timer_isr_handles[SOC_TIMER_GROUP_TOTAL_TIMERS];
+
+#define GET_TIMER_INFO(TG, TID) (&timer_info[(TG)*SOC_TIMER_GROUP_TIMERS_PER_GROUP+(TID)])
+
+// timer group interruption handle callback
+static bool test_timer_group_isr_cb(void *arg)
+{
+    bool is_awoken = false;
+    timer_info_t *info = (timer_info_t *) arg;
+    const timer_group_t timer_group = info->timer_group;
+    const timer_idx_t timer_idx = info->timer_idx;
+    uint64_t timer_val;
+    double time;
+    uint64_t alarm_value;
+    timer_event_t evt;
+    alarm_flag = true;
+    if (timer_group_get_auto_reload_in_isr(timer_group, timer_idx)) { // For autoreload mode, the counter value has been cleared
+        timer_group_clr_intr_status_in_isr(timer_group, timer_idx);
+        esp_rom_printf("This is TG%d timer[%d] reload-timer alarm!\n", timer_group, timer_idx);
+        timer_get_counter_value(timer_group, timer_idx, &timer_val);
+        timer_get_counter_time_sec(timer_group, timer_idx, &time);
+        evt.type = TIMER_AUTORELOAD_EN;
+    } else {
+        timer_group_clr_intr_status_in_isr(timer_group, timer_idx);
+        esp_rom_printf("This is TG%d timer[%d] count-up-timer alarm!\n", timer_group, timer_idx);
+        timer_get_counter_value(timer_group, timer_idx, &timer_val);
+        timer_get_counter_time_sec(timer_group, timer_idx, &time);
+        timer_get_alarm_value(timer_group, timer_idx, &alarm_value);
+        timer_set_counter_value(timer_group, timer_idx, 0);
+        evt.type = TIMER_AUTORELOAD_DIS;
+    }
+    evt.timer_group = timer_group;
+    evt.timer_idx = timer_idx;
+    evt.timer_counter_value = timer_val;
+    if (timer_queue != NULL) {
+        BaseType_t awoken = pdFALSE;
+        BaseType_t ret = xQueueSendFromISR(timer_queue, &evt, &awoken);
+        TEST_ASSERT_EQUAL(pdTRUE, ret);
+        if (awoken) {
+            is_awoken = true;
+        }
+    }
+    return is_awoken;
+}
+
+// timer group interruption handle
+static void test_timer_group_isr(void *arg)
+{
+    if (test_timer_group_isr_cb(arg)) {
+        portYIELD_FROM_ISR();
+    }
+}
+
+// initialize all timer
+static void all_timer_init(timer_config_t *config, bool expect_init)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ASSERT_EQUAL((expect_init ? ESP_OK : ESP_ERR_INVALID_ARG), timer_init(tg_idx, timer_idx, config));
+        }
+    }
+    if (timer_queue == NULL) {
+        timer_queue = xQueueCreate(10, sizeof(timer_event_t));
+    }
+}
+
+// deinitialize all timer
+static void all_timer_deinit(void)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_deinit(tg_idx, timer_idx));
+        }
+    }
+    if (timer_queue != NULL) {
+        vQueueDelete(timer_queue);
+        timer_queue = NULL;
+    }
+}
+
+// start all of timer
+static void all_timer_start(void)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_start(tg_idx, timer_idx));
+        }
+    }
+}
+
+static void all_timer_set_counter_value(uint64_t set_cnt_val)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_set_counter_value(tg_idx, timer_idx, set_cnt_val));
+        }
+    }
+}
+
+static void all_timer_pause(void)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_pause(tg_idx, timer_idx));
+        }
+    }
+}
+
+static void all_timer_get_counter_value(uint64_t set_cnt_val, bool expect_equal_set_val,
+                                        uint64_t *actual_cnt_val)
+{
+    uint64_t current_cnt_val;
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_get_counter_value(tg_idx, timer_idx, &current_cnt_val));
+            if (expect_equal_set_val) {
+                TEST_ASSERT_EQUAL(set_cnt_val, current_cnt_val);
+            } else {
+                TEST_ASSERT_NOT_EQUAL(set_cnt_val, current_cnt_val);
+                if (actual_cnt_val != NULL) {
+                    actual_cnt_val[tg_idx * SOC_TIMER_GROUP_TIMERS_PER_GROUP + timer_idx] = current_cnt_val;
+                }
+            }
+        }
+    }
+}
+
+static void all_timer_get_counter_time_sec(int expect_time)
+{
+    double time;
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_get_counter_time_sec(tg_idx, timer_idx, &time));
+            TEST_ASSERT_FLOAT_WITHIN(TIMER_DELTA, expect_time, time);
+        }
+    }
+}
+
+static void all_timer_set_counter_mode(timer_count_dir_t counter_dir)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_set_counter_mode(tg_idx, timer_idx, counter_dir));
+        }
+    }
+}
+
+static void all_timer_set_divider(uint32_t divider)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_set_divider(tg_idx, timer_idx, divider));
+        }
+    }
+}
+
+static void all_timer_set_alarm_value(uint64_t alarm_cnt_val)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_set_alarm_value(tg_idx, timer_idx, alarm_cnt_val));
+        }
+    }
+}
+
+static void all_timer_get_alarm_value(uint64_t *alarm_vals)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_get_alarm_value(tg_idx, timer_idx, &alarm_vals[tg_idx * SOC_TIMER_GROUP_TIMERS_PER_GROUP + timer_idx]));
+        }
+    }
+}
+
+static void all_timer_isr_reg(void)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(timer_isr_register(tg_idx, timer_idx, test_timer_group_isr,
+                                           GET_TIMER_INFO(tg_idx, timer_idx), ESP_INTR_FLAG_LOWMED, &timer_isr_handles[tg_idx * SOC_TIMER_GROUP_TIMERS_PER_GROUP + timer_idx]));
+        }
+    }
+}
+
+static void all_timer_isr_unreg(void)
+{
+    for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+        for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+            TEST_ESP_OK(esp_intr_free(timer_isr_handles[tg_idx * SOC_TIMER_GROUP_TIMERS_PER_GROUP + timer_idx]));
+        }
+    }
+}
+
+// enable interrupt and start timer
+static void timer_intr_enable_and_start(int timer_group, int timer_idx, double alarm_time)
+{
+    TEST_ESP_OK(timer_pause(timer_group, timer_idx));
+    TEST_ESP_OK(timer_set_counter_value(timer_group, timer_idx, 0x0));
+    TEST_ESP_OK(timer_set_alarm_value(timer_group, timer_idx, alarm_time * TEST_TIMER_RESOLUTION_HZ));
+    TEST_ESP_OK(timer_set_alarm(timer_group, timer_idx, TIMER_ALARM_EN));
+    TEST_ESP_OK(timer_enable_intr(timer_group, timer_idx));
+    TEST_ESP_OK(timer_start(timer_group, timer_idx));
+}
+
+static void timer_isr_check(timer_group_t group_num, timer_idx_t timer_num, timer_autoreload_t autoreload, uint64_t alarm_cnt_val)
+{
+    timer_event_t evt;
+    TEST_ASSERT_EQUAL(pdTRUE, xQueueReceive(timer_queue, &evt, 3000 / portTICK_PERIOD_MS));
+    TEST_ASSERT_EQUAL(autoreload, evt.type);
+    TEST_ASSERT_EQUAL(group_num, evt.timer_group);
+    TEST_ASSERT_EQUAL(timer_num, evt.timer_idx);
+    TEST_ASSERT_EQUAL((uint32_t)(alarm_cnt_val >> 32), (uint32_t)(evt.timer_counter_value >> 32));
+    TEST_ASSERT_UINT32_WITHIN(1000, (uint32_t)(alarm_cnt_val), (uint32_t)(evt.timer_counter_value));
+}
+
+static void timer_intr_enable_disable_test(timer_group_t group_num, timer_idx_t timer_num, uint64_t alarm_cnt_val)
+{
+    alarm_flag = false;
+    TEST_ESP_OK(timer_set_counter_value(group_num, timer_num, 0));
+    TEST_ESP_OK(timer_set_alarm(group_num, timer_num, TIMER_ALARM_EN));
+    TEST_ESP_OK(timer_enable_intr(group_num, timer_num));
+    TEST_ESP_OK(timer_start(group_num, timer_num));
+    timer_isr_check(group_num, timer_num, TIMER_AUTORELOAD_DIS, alarm_cnt_val);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+
+    // disable interrupt of tg0_timer0
+    alarm_flag = false;
+    TEST_ESP_OK(timer_pause(group_num, timer_num));
+    TEST_ESP_OK(timer_set_counter_value(group_num, timer_num, 0));
+    TEST_ESP_OK(timer_disable_intr(group_num, timer_num));
+    TEST_ESP_OK(timer_start(group_num, timer_num));
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
+    TEST_ASSERT_EQUAL(false, alarm_flag);
+}
+
+TEST_CASE("Timer_init", "[hw_timer]")
+{
+    // Test init 1:config parameter
+    // empty parameter
+    timer_config_t config0 = { };
+    all_timer_init(&config0, false);
+
+    // only one parameter
+    timer_config_t config1 = {
+        .auto_reload = TIMER_AUTORELOAD_EN
+    };
+    all_timer_init(&config1, false);
+
+    // lack one parameter
+    timer_config_t config2 = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    all_timer_init(&config2, true);
+
+    config2.counter_en = TIMER_PAUSE;
+    all_timer_init(&config2, true);
+
+    // Test init 2:  init
+    uint64_t set_timer_val = 0x0;
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_DIS,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+
+    // judge get config parameters
+    timer_config_t get_config;
+    TEST_ESP_OK(timer_init(TIMER_GROUP_0, TIMER_0, &config));
+    TEST_ESP_OK(timer_get_config(TIMER_GROUP_0, TIMER_0, &get_config));
+    TEST_ASSERT_EQUAL(config.alarm_en, get_config.alarm_en);
+    TEST_ASSERT_EQUAL(config.auto_reload, get_config.auto_reload);
+    TEST_ASSERT_EQUAL(config.counter_dir, get_config.counter_dir);
+    TEST_ASSERT_EQUAL(config.counter_en, get_config.counter_en);
+    TEST_ASSERT_EQUAL(config.intr_type, get_config.intr_type);
+    TEST_ASSERT_EQUAL(config.divider, get_config.divider);
+
+    all_timer_init(&config, true);
+    all_timer_pause();
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    all_timer_get_counter_value(set_timer_val, false, NULL);
+
+    // Test init 3:  wrong parameter
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_init(-1, TIMER_0, &config));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_init(TIMER_GROUP_0, 2, &config));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_init(TIMER_GROUP_0, -1, &config));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_init(2, TIMER_0, &config));
+    all_timer_deinit();
+}
+
+/**
+ * read count case:
+ * 1. start timer compare value
+ * 2. pause timer compare value
+ * 3. delay some time */
+TEST_CASE("Timer_read_counter_value", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    uint64_t set_timer_val = 0x0;
+
+    all_timer_init(&config, true);
+
+    // Test read value 1: start timer get counter value
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    all_timer_get_counter_value(set_timer_val, false, NULL);
+
+    // Test read value 2: pause timer get counter value
+    all_timer_pause();
+    set_timer_val = 0x30405000ULL;
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_get_counter_value(set_timer_val, true, NULL);
+
+    // Test read value 3:delay 1s get counter value
+    set_timer_val = 0x0;
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    all_timer_get_counter_time_sec(1);
+    all_timer_deinit();
+}
+
+/**
+ * start timer case:
+ * 1. normal start
+ * 2. error start parameter
+ * */
+TEST_CASE("Timer_start", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    uint64_t set_timer_val = 0x0;
+    all_timer_init(&config, true);
+
+    //Test start 1: normal start
+    all_timer_start();
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_get_counter_value(set_timer_val, false, NULL);
+
+    //Test start 2:wrong parameter
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_start(2, TIMER_0));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_start(-1, TIMER_0));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_start(TIMER_GROUP_0, 2));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_start(TIMER_GROUP_0, -1));
+    all_timer_deinit();
+}
+
+/**
+ * pause timer case:
+ * 1. normal pause, read value
+ * 2. error pause error
+ */
+TEST_CASE("Timer_pause", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    uint64_t set_timer_val = 0x0;
+    all_timer_init(&config, true);
+
+    //Test pause 1: right parameter
+    all_timer_pause();
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_get_counter_value(set_timer_val, true, NULL);
+
+    //Test pause 2: wrong parameter
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_pause(-1, TIMER_0));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_pause(TIMER_GROUP_0, -1));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_pause(2, TIMER_0));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_pause(TIMER_GROUP_0, 2));
+    all_timer_deinit();
+}
+
+// positive mode and negative mode
+TEST_CASE("Timer_counter_direction", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    uint64_t set_timer_val = 0x0;
+    all_timer_init(&config, true);
+    all_timer_pause();
+
+    // Test counter mode 1: TIMER_COUNT_UP
+    all_timer_set_counter_mode(TIMER_COUNT_UP);
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    all_timer_get_counter_time_sec(1);
+
+    // Test counter mode 2: TIMER_COUNT_DOWN
+    all_timer_pause();
+    set_timer_val = TEST_TIMER_RESOLUTION_HZ * 3; // 3s clock counter value
+    all_timer_set_counter_mode(TIMER_COUNT_DOWN);
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    all_timer_get_counter_time_sec(2);
+
+    // Test counter mode 3 : wrong parameter
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_set_counter_mode(TIMER_GROUP_0, TIMER_0, -1));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_set_counter_mode(TIMER_GROUP_0, TIMER_0, 2));
+    all_timer_deinit();
+}
+
+TEST_CASE("Timer_divider", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    uint64_t set_timer_val = 0;
+    uint64_t time_val[TIMER_GROUP_MAX * TIMER_MAX];
+    uint64_t comp_time_val[TIMER_GROUP_MAX * TIMER_MAX];
+    all_timer_init(&config, true);
+
+    all_timer_pause();
+    all_timer_set_counter_value(set_timer_val);
+
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    all_timer_get_counter_value(set_timer_val, false, time_val);
+
+    all_timer_pause();
+    all_timer_set_divider(config.divider / 2); // half of original divider
+    all_timer_set_counter_value(set_timer_val);
+
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);         //delay the same time
+    all_timer_get_counter_value(set_timer_val, false, comp_time_val);
+    for (int i = 0; i < TIMER_GROUP_MAX * TIMER_MAX; i++) {
+        TEST_ASSERT_INT_WITHIN(2000, 1000000, time_val[i]);
+        TEST_ASSERT_INT_WITHIN(2000, 2000000, comp_time_val[i]);
+    }
+
+    all_timer_pause();
+    all_timer_set_divider(256);
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);         //delay the same time
+    all_timer_get_counter_value(set_timer_val, false, comp_time_val);
+    for (int i = 0; i < TIMER_GROUP_MAX * TIMER_MAX; i++) {
+        TEST_ASSERT_INT_WITHIN(100, APB_CLK_FREQ / 256, comp_time_val[i]);
+    }
+
+    all_timer_pause();
+    all_timer_set_divider(2);
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    all_timer_get_counter_value(set_timer_val, false, comp_time_val);
+    for (int i = 0; i < TIMER_GROUP_MAX * TIMER_MAX; i++) {
+        TEST_ASSERT_INT_WITHIN(5000, APB_CLK_FREQ / 2, comp_time_val[i]);
+    }
+
+    all_timer_pause();
+    all_timer_set_divider(65536);
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_start();
+    vTaskDelay(1000 / portTICK_PERIOD_MS);         //delay the same time
+    all_timer_get_counter_value(set_timer_val, false, comp_time_val);
+    for (int i = 0; i < TIMER_GROUP_MAX * TIMER_MAX; i++) {
+        TEST_ASSERT_INT_WITHIN(10, APB_CLK_FREQ / 65536, comp_time_val[i]);
+    }
+
+    all_timer_pause();
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_set_divider(TIMER_GROUP_0, TIMER_0, 1));
+    TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, timer_set_divider(TIMER_GROUP_0, TIMER_0, 65537));
+    all_timer_deinit();
+}
+
+/**
+ * enable alarm case:
+ * 1. enable alarm ,set alarm value and get value
+ * 2. disable alarm ,set alarm value and get value
+ */
+TEST_CASE("Timer_enable_alarm", "[hw_timer]")
+{
+    timer_config_t config_test = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_DIS,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    all_timer_init(&config_test, true);
+    all_timer_isr_reg();
+
+    // enable alarm of tg0_timer1
+    alarm_flag = false;
+    TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_0, TIMER_0, TIMER_ALARM_EN));
+    timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 1.2);
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_DIS, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+
+    // disable alarm of tg0_timer1
+    alarm_flag = false;
+    timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 1.2);
+    TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_0, TIMER_0, TIMER_ALARM_DIS));
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
+    TEST_ASSERT_EQUAL(false, alarm_flag);
+
+#if SOC_TIMER_GROUPS > 1
+    // enable alarm of tg1_timer0
+    alarm_flag = false;
+    TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_1, TIMER_0, TIMER_ALARM_EN));
+    timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 1.2);
+    timer_isr_check(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_DIS, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+
+    // disable alarm of tg1_timer0
+    alarm_flag = false;
+    timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 1.2);
+    TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_1, TIMER_0, TIMER_ALARM_DIS));
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
+    TEST_ASSERT_EQUAL(false, alarm_flag);
+#endif
+    all_timer_isr_unreg();
+    all_timer_deinit();
+}
+
+/**
+ * alarm value case:
+ * 1. set alarm value and get value
+ * 2. interrupt test time
+ */
+TEST_CASE("Timer_set_alarm_value", "[hw_timer]")
+{
+    uint64_t alarm_val[SOC_TIMER_GROUP_TOTAL_TIMERS];
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    all_timer_init(&config, true);
+    all_timer_isr_reg();
+
+    // set and get alarm value
+    all_timer_set_alarm_value(3 * TEST_TIMER_RESOLUTION_HZ);
+    all_timer_get_alarm_value(alarm_val);
+    for (int i = 0; i < SOC_TIMER_GROUP_TOTAL_TIMERS; i++) {
+        TEST_ASSERT_EQUAL_UINT32(3 * TEST_TIMER_RESOLUTION_HZ, (uint32_t)alarm_val[i]);
+    }
+
+    // set interrupt read alarm value
+    timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 2.4);
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_DIS, 2.4 * TEST_TIMER_RESOLUTION_HZ);
+#if SOC_TIMER_GROUPS > 1
+    timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 1.4);
+    timer_isr_check(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_DIS, 1.4 * TEST_TIMER_RESOLUTION_HZ);
+#endif
+    all_timer_isr_unreg();
+    all_timer_deinit();
+}
+
+/**
+ * auto reload case:
+ * 1. no reload
+ * 2. auto reload
+ */
+TEST_CASE("Timer_auto_reload", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    all_timer_init(&config, true);
+    all_timer_isr_reg();
+
+    // test disable auto_reload
+    timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 1.14);
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_DIS, 1.14 * TEST_TIMER_RESOLUTION_HZ);
+#if SOC_TIMER_GROUPS > 1
+    timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 1.14);
+    timer_isr_check(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_DIS, 1.14 * TEST_TIMER_RESOLUTION_HZ);
+#endif
+
+    //test enable auto_reload
+    TEST_ESP_OK(timer_set_auto_reload(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_EN));
+    timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 1.4);
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_EN, 0);
+#if SOC_TIMER_GROUPS > 1
+    TEST_ESP_OK(timer_set_auto_reload(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_EN));
+    timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 1.4);
+    timer_isr_check(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_EN, 0);
+#endif
+    all_timer_isr_unreg();
+    all_timer_deinit();
+}
+
+/**
+ * timer_enable_intr case:
+ * 1. enable timer_intr
+ * 2. disable timer_intr
+ */
+TEST_CASE("Timer_enable_timer_interrupt", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+
+    all_timer_init(&config, true);
+    all_timer_pause();
+    all_timer_set_alarm_value(1.2 * TEST_TIMER_RESOLUTION_HZ);
+    all_timer_set_counter_value(0);
+    all_timer_isr_reg();
+    timer_intr_enable_disable_test(TIMER_GROUP_0, TIMER_0, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+#if SOC_TIMER_GROUPS > 1
+    timer_intr_enable_disable_test(TIMER_GROUP_1, TIMER_0, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+#endif
+
+    // enable interrupt of tg0_timer0 again
+    alarm_flag = false;
+    TEST_ESP_OK(timer_pause(TIMER_GROUP_0, TIMER_0));
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_0, TIMER_0, 0));
+    TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_0, TIMER_0, TIMER_ALARM_EN));
+    TEST_ESP_OK(timer_enable_intr(TIMER_GROUP_0, TIMER_0));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_0, TIMER_0));
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_DIS, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+    all_timer_isr_unreg();
+    all_timer_deinit();
+}
+
+/**
+ * enable timer group case:
+ * 1. enable timer group
+ * 2. disable timer group
+ */
+TEST_CASE("Timer_enable_timer_group_interrupt", "[hw_timer][ignore]")
+{
+    intr_handle_t isr_handle = NULL;
+    alarm_flag = false;
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+    uint64_t set_timer_val = 0x0;
+    all_timer_init(&config, true);
+    all_timer_pause();
+    all_timer_set_counter_value(set_timer_val);
+    all_timer_set_alarm_value(1.2 * TEST_TIMER_RESOLUTION_HZ);
+
+    // enable interrupt of tg0_timer0
+    TEST_ESP_OK(timer_group_intr_enable(TIMER_GROUP_0, TIMER_INTR_T0));
+    TEST_ESP_OK(timer_isr_register(TIMER_GROUP_0, TIMER_0, test_timer_group_isr,
+                                   GET_TIMER_INFO(TIMER_GROUP_0, TIMER_0), ESP_INTR_FLAG_LOWMED, &isr_handle));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_0, TIMER_0));
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_DIS, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+
+    // disable interrupt of tg0_timer0
+    alarm_flag = false;
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_0, TIMER_0, set_timer_val));
+    TEST_ESP_OK(timer_group_intr_disable(TIMER_GROUP_0, TIMER_INTR_T0));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_0, TIMER_0));
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
+    TEST_ASSERT_EQUAL(false, alarm_flag);
+    esp_intr_free(isr_handle);
+}
+
+/**
+ * isr_register case:
+ * Cycle register 15 times, compare the heap size to ensure no memory leaks
+ */
+TEST_CASE("Timer_interrupt_register", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_DIS,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL
+    };
+
+    for (int i = 0; i < 15; i++) {
+        all_timer_init(&config, true);
+        timer_isr_handle_t timer_isr_handle[TIMER_GROUP_MAX * TIMER_MAX];
+        for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+            for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+                TEST_ESP_OK(timer_isr_register(tg_idx, timer_idx, test_timer_group_isr,
+                                               GET_TIMER_INFO(tg_idx, timer_idx), ESP_INTR_FLAG_LOWMED, &timer_isr_handle[tg_idx * SOC_TIMER_GROUP_TIMERS_PER_GROUP + timer_idx]));
+            }
+        }
+
+        TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_0, TIMER_0, TIMER_ALARM_EN));
+        timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 0.54);
+#if SOC_TIMER_GROUPS > 1
+        TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_1, TIMER_0, TIMER_ALARM_EN));
+        timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 0.34);
+#endif
+
+        TEST_ESP_OK(timer_set_auto_reload(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_EN));
+        TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_0, TIMER_0, TIMER_ALARM_EN));
+        timer_intr_enable_and_start(TIMER_GROUP_0, TIMER_0, 0.4);
+#if SOC_TIMER_GROUPS > 1
+        TEST_ESP_OK(timer_set_auto_reload(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_EN));
+        TEST_ESP_OK(timer_set_alarm(TIMER_GROUP_1, TIMER_0, TIMER_ALARM_EN));
+        timer_intr_enable_and_start(TIMER_GROUP_1, TIMER_0, 0.6);
+#endif
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+
+        // ISR hanlde function should be free before next ISR register.
+        for (uint32_t tg_idx = 0; tg_idx < TIMER_GROUP_MAX; tg_idx++) {
+            for (uint32_t timer_idx = 0; timer_idx < TIMER_MAX; timer_idx++) {
+                TEST_ESP_OK(esp_intr_free(timer_isr_handle[tg_idx * SOC_TIMER_GROUP_TIMERS_PER_GROUP + timer_idx]));
+            }
+        }
+        all_timer_deinit();
+    }
+}
+
+#if SOC_TIMER_GROUP_SUPPORT_XTAL
+/**
+ * Timer clock source:
+ * 1. configure clock source as APB clock, and enable timer interrupt
+ * 2. configure clock source as XTAL clock, adn enable timer interrupt
+ */
+TEST_CASE("Timer_clock_source", "[hw_timer]")
+{
+    // configure clock source as APB clock
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_DIS,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL,
+    };
+    all_timer_init(&config, true);
+    all_timer_pause();
+    all_timer_set_alarm_value(1.2 * TEST_TIMER_RESOLUTION_HZ);
+    all_timer_set_counter_value(0);
+    all_timer_isr_reg();
+
+    timer_intr_enable_disable_test(TIMER_GROUP_0, TIMER_0, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+#if SOC_TIMER_GROUPS > 1
+    timer_intr_enable_disable_test(TIMER_GROUP_1, TIMER_0, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+#endif
+
+    // configure clock source as XTAL clock
+    all_timer_pause();
+    config.clk_src = TIMER_SRC_CLK_XTAL;
+    config.divider = rtc_clk_xtal_freq_get() * 1000000 / TEST_TIMER_RESOLUTION_HZ;
+    all_timer_init(&config, true);
+    all_timer_set_alarm_value(1.2 * TEST_TIMER_RESOLUTION_HZ);
+
+    timer_intr_enable_disable_test(TIMER_GROUP_0, TIMER_0, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+#if SOC_TIMER_GROUPS > 1
+    timer_intr_enable_disable_test(TIMER_GROUP_1, TIMER_0, 1.2 * TEST_TIMER_RESOLUTION_HZ);
+#endif
+
+    all_timer_isr_unreg();
+    all_timer_deinit();
+}
+#endif
+
+/**
+ * Timer ISR callback test
+ */
+TEST_CASE("Timer_ISR_callback", "[hw_timer]")
+{
+    alarm_flag = false;
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_DIS,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL,
+    };
+    uint64_t alarm_cnt_val = 1.2 * TEST_TIMER_RESOLUTION_HZ;
+    uint64_t set_timer_val = 0x0;
+    all_timer_init(&config, true);
+    all_timer_pause();
+    all_timer_set_alarm_value(alarm_cnt_val);
+    all_timer_set_counter_value(set_timer_val);
+
+    // add isr callback for tg0_timer0
+    TEST_ESP_OK(timer_isr_callback_add(TIMER_GROUP_0, TIMER_0, test_timer_group_isr_cb,
+                                       GET_TIMER_INFO(TIMER_GROUP_0, TIMER_0), ESP_INTR_FLAG_LOWMED));
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_0, TIMER_0, set_timer_val));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_0, TIMER_0));
+    timer_isr_check(TIMER_GROUP_0, TIMER_0, TIMER_AUTORELOAD_DIS, alarm_cnt_val);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+
+    // remove isr callback for tg0_timer0
+    TEST_ESP_OK(timer_pause(TIMER_GROUP_0, TIMER_0));
+    TEST_ESP_OK(timer_isr_callback_remove(TIMER_GROUP_0, TIMER_0));
+    alarm_flag = false;
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_0, TIMER_0, set_timer_val));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_0, TIMER_0));
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
+    TEST_ASSERT_EQUAL(false, alarm_flag);
+
+#if SOC_TIMER_GROUPS > 1
+    // add isr callback for tg1_timer0
+    TEST_ESP_OK(timer_pause(TIMER_GROUP_1, TIMER_0));
+    TEST_ESP_OK(timer_isr_callback_add(TIMER_GROUP_1, TIMER_0, test_timer_group_isr_cb,
+                                       GET_TIMER_INFO(TIMER_GROUP_1, TIMER_0), ESP_INTR_FLAG_LOWMED));
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_1, TIMER_0, set_timer_val));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_1, TIMER_0));
+    timer_isr_check(TIMER_GROUP_1, TIMER_0, TIMER_AUTORELOAD_DIS, alarm_cnt_val);
+    TEST_ASSERT_EQUAL(true, alarm_flag);
+
+    // remove isr callback for tg1_timer0
+    TEST_ESP_OK(timer_pause(TIMER_GROUP_1, TIMER_0));
+    TEST_ESP_OK(timer_isr_callback_remove(TIMER_GROUP_1, TIMER_0));
+    alarm_flag = false;
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_1, TIMER_0, set_timer_val));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_1, TIMER_0));
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
+    TEST_ASSERT_EQUAL(false, alarm_flag);
+#endif
+    all_timer_deinit();
+}
+
+/**
+ * Timer memory test
+ */
+TEST_CASE("Timer_init_deinit_stress_test", "[hw_timer]")
+{
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .alarm_en = TIMER_ALARM_EN,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .intr_type = TIMER_INTR_LEVEL,
+    };
+    for (uint32_t i = 0; i < 100; i++) {
+        all_timer_init(&config, true);
+        all_timer_deinit();
+    }
+}
+
+// The following test cases are used to check if the timer_group fix works.
+// Some applications use a software reset, at the reset time, timer_group happens to generate an interrupt.
+// but software reset does not clear interrupt status, this is not safe for application when enable the interrupt of timer_group.
+// This case will check under this fix, whether the interrupt status is cleared after timer_group initialization.
+static void timer_group_test_init(void)
+{
+    static const uint32_t time_ms = 100;  // Alarm value 100ms.
+    static const uint32_t ste_val = time_ms * TEST_TIMER_RESOLUTION_HZ / 1000;
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_PAUSE,
+        .alarm_en = TIMER_ALARM_EN,
+        .intr_type = TIMER_INTR_LEVEL,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+    };
+    TEST_ESP_OK(timer_init(TIMER_GROUP_0, TIMER_0, &config));
+    TEST_ESP_OK(timer_set_counter_value(TIMER_GROUP_0, TIMER_0, 0x00000000ULL));
+    TEST_ESP_OK(timer_set_alarm_value(TIMER_GROUP_0, TIMER_0, ste_val));
+    //Now the timer is ready.
+    //We only need to check the interrupt status and don't have to register a interrupt routine.
+}
+
+//
+// Timer check reinitialization sequence
+//
+TEST_CASE("Timer_check_reinitialization_sequence", "[hw_timer]")
+{
+    // 1. step - install driver
+    timer_group_test_init();
+    // 2 - register interrupt and start timer
+    TEST_ESP_OK(timer_enable_intr(TIMER_GROUP_0, TIMER_0));
+    TEST_ESP_OK(timer_start(TIMER_GROUP_0, TIMER_0));
+    // Do some work
+    vTaskDelay(80 / portTICK_PERIOD_MS);
+    // 3 - deinit timer driver
+    TEST_ESP_OK(timer_deinit(TIMER_GROUP_0, TIMER_0));
+    timer_config_t config = {
+        .clk_src = TIMER_SRC_CLK_APB,
+        .divider = APB_CLK_FREQ / TEST_TIMER_RESOLUTION_HZ,
+        .counter_dir = TIMER_COUNT_UP,
+        .counter_en = TIMER_START,
+        .alarm_en = TIMER_ALARM_EN,
+        .intr_type = TIMER_INTR_LEVEL,
+        .auto_reload = TIMER_AUTORELOAD_EN,
+    };
+    // 4 - reinstall driver
+    TEST_ESP_OK(timer_init(TIMER_GROUP_0, TIMER_0, &config));
+    // 5 - enable interrupt
+    TEST_ESP_OK(timer_enable_intr(TIMER_GROUP_0, TIMER_0));
+    vTaskDelay(30 / portTICK_PERIOD_MS);
+    // The pending timer interrupt should not be triggered
+    TEST_ASSERT_EQUAL(0, timer_group_get_intr_status_in_isr(TIMER_GROUP_0) & TIMER_INTR_T0);
+}
+
+void test_app_include_legacy_timer(void)
+{
+}
diff --git a/components/driver/test_apps/legacy_timer_driver/sdkconfig.ci.release b/components/driver/test_apps/legacy_timer_driver/sdkconfig.ci.release
new file mode 100644
index 0000000000..91d93f163e
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/sdkconfig.ci.release
@@ -0,0 +1,5 @@
+CONFIG_PM_ENABLE=y
+CONFIG_FREERTOS_USE_TICKLESS_IDLE=y
+CONFIG_COMPILER_OPTIMIZATION_SIZE=y
+CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_SIZE=y
+CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_SILENT=y
diff --git a/components/driver/test_apps/legacy_timer_driver/sdkconfig.defaults b/components/driver/test_apps/legacy_timer_driver/sdkconfig.defaults
new file mode 100644
index 0000000000..daa206f8c7
--- /dev/null
+++ b/components/driver/test_apps/legacy_timer_driver/sdkconfig.defaults
@@ -0,0 +1,3 @@
+CONFIG_FREERTOS_HZ=1000
+CONFIG_ESP_TASK_WDT=n
+CONFIG_GPTIMER_SUPPRESS_DEPRECATE_WARN=y