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

646 wiersze
25 KiB
C

/*
* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
/* LEDC tested by PCNT in some case
* PCNT can get the LEDC waveform frequency
*
* some calculation related with duty:
* real duty = duty/2^duty_resolution
*/
#include <esp_types.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/semphr.h"
#include "freertos/queue.h"
#include "unity.h"
#include "soc/ledc_periph.h"
#include "soc/gpio_periph.h"
#include "soc/io_mux_reg.h"
#include "esp_system.h"
#include "esp_timer.h"
#include "driver/ledc.h"
#include "hal/ledc_ll.h"
#include "driver/gpio.h"
#define PULSE_IO 18
#define TEST_PWM_FREQ 2000
#if SOC_LEDC_SUPPORT_HS_MODE
#define TEST_SPEED_MODE LEDC_HIGH_SPEED_MODE
#define SPEED_MODE_LIST {LEDC_HIGH_SPEED_MODE, LEDC_LOW_SPEED_MODE}
#else
#define TEST_SPEED_MODE LEDC_LOW_SPEED_MODE
#define SPEED_MODE_LIST {LEDC_LOW_SPEED_MODE}
#endif
#if SOC_LEDC_SUPPORT_APB_CLOCK
#define TEST_DEFAULT_CLK_CFG LEDC_USE_APB_CLK
#elif SOC_LEDC_SUPPORT_PLL_DIV_CLOCK
#define TEST_DEFAULT_CLK_CFG LEDC_USE_PLL_DIV_CLK
#endif
static ledc_channel_config_t initialize_channel_config(void)
{
ledc_channel_config_t config;
memset(&config, 0, sizeof(ledc_channel_config_t));
config.gpio_num = PULSE_IO;
config.speed_mode = TEST_SPEED_MODE;
config.channel = LEDC_CHANNEL_0;
config.intr_type = LEDC_INTR_DISABLE;
config.timer_sel = LEDC_TIMER_0;
config.duty = 4000;
config.hpoint = 0;
return config;
}
static ledc_timer_config_t create_default_timer_config(void)
{
ledc_timer_config_t ledc_time_config;
memset(&ledc_time_config, 0, sizeof(ledc_timer_config_t));
ledc_time_config.speed_mode = TEST_SPEED_MODE;
ledc_time_config.duty_resolution = LEDC_TIMER_13_BIT;
ledc_time_config.timer_num = LEDC_TIMER_0;
ledc_time_config.freq_hz = TEST_PWM_FREQ;
ledc_time_config.clk_cfg = TEST_DEFAULT_CLK_CFG;
return ledc_time_config;
}
static void fade_setup(void)
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.duty = 0;
ledc_timer_config_t ledc_time_config = create_default_timer_config();
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
vTaskDelay(5 / portTICK_PERIOD_MS);
//initialize fade service
TEST_ESP_OK(ledc_fade_func_install(0));
}
static void timer_duty_set_get(ledc_mode_t speed_mode, ledc_channel_t channel, uint32_t duty)
{
TEST_ESP_OK(ledc_set_duty(speed_mode, channel, duty));
TEST_ESP_OK(ledc_update_duty(speed_mode, channel));
vTaskDelay(100 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(duty, ledc_get_duty(speed_mode, channel));
}
// use logic analyzer to view
static void timer_duty_test(ledc_channel_t channel, ledc_timer_bit_t timer_bit, ledc_timer_t timer, ledc_mode_t speed_mode)
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.speed_mode = speed_mode;
ledc_ch_config.channel = channel;
ledc_ch_config.timer_sel = timer;
ledc_timer_config_t ledc_time_config = create_default_timer_config();
ledc_time_config.speed_mode = speed_mode;
ledc_time_config.duty_resolution = timer_bit;
ledc_time_config.timer_num = timer;
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
// duty ratio: (2^duty)/(2^timer_bit)
timer_duty_set_get(ledc_ch_config.speed_mode, ledc_ch_config.channel, 0);
timer_duty_set_get(ledc_ch_config.speed_mode, ledc_ch_config.channel, 1);
timer_duty_set_get(ledc_ch_config.speed_mode, ledc_ch_config.channel, 1 << 12); // 50% duty
timer_duty_set_get(ledc_ch_config.speed_mode, ledc_ch_config.channel, (1 << 13) - 1);
timer_duty_set_get(ledc_ch_config.speed_mode, ledc_ch_config.channel, (1 << 13) - 2);
}
TEST_CASE("LEDC channel config wrong gpio", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.gpio_num = GPIO_NUM_MAX;
TEST_ASSERT(ledc_channel_config(&ledc_ch_config) == ESP_ERR_INVALID_ARG);
}
TEST_CASE("LEDC channel config wrong speed", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.speed_mode = LEDC_SPEED_MODE_MAX;
TEST_ASSERT(ledc_channel_config(&ledc_ch_config) == ESP_ERR_INVALID_ARG);
}
TEST_CASE("LEDC channel config wrong channel", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.channel = LEDC_CHANNEL_MAX;
TEST_ASSERT(ledc_channel_config(&ledc_ch_config) == ESP_ERR_INVALID_ARG);
}
TEST_CASE("LEDC channel config wrong interrupt type", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.intr_type = 2;
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, ledc_channel_config(&ledc_ch_config));
}
TEST_CASE("LEDC wrong timer", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_ch_config.timer_sel = LEDC_TIMER_MAX;
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, ledc_channel_config(&ledc_ch_config));
}
TEST_CASE("LEDC channel config basic parameter test", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
TEST_ASSERT_EQUAL(ESP_OK, ledc_channel_config(&ledc_ch_config));
}
TEST_CASE("LEDC wrong duty resolution", "[ledc]")
{
ledc_timer_config_t ledc_time_config = create_default_timer_config();
ledc_time_config.duty_resolution = LEDC_TIMER_BIT_MAX;
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, ledc_timer_config(&ledc_time_config));
}
TEST_CASE("LEDC timer config wrong timer", "[ledc]")
{
ledc_timer_config_t ledc_time_config = create_default_timer_config();
ledc_time_config.timer_num = LEDC_TIMER_MAX;
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, ledc_timer_config(&ledc_time_config));
}
TEST_CASE("LEDC timer config wrong speed mode", "[ledc]")
{
ledc_timer_config_t ledc_time_config = create_default_timer_config();
ledc_time_config.speed_mode = LEDC_SPEED_MODE_MAX;
TEST_ASSERT_EQUAL(ESP_ERR_INVALID_ARG, ledc_timer_config(&ledc_time_config));
}
TEST_CASE("LEDC timer config basic parameter test", "[ledc]")
{
ledc_timer_config_t ledc_time_config = create_default_timer_config();
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
}
TEST_CASE("LEDC output idle level test", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_timer_config_t ledc_time_config = create_default_timer_config();
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
uint32_t current_level = LEDC.channel_group[test_speed_mode].channel[LEDC_CHANNEL_0].conf0.idle_lv;
TEST_ESP_OK(ledc_stop(test_speed_mode, LEDC_CHANNEL_0, !current_level));
vTaskDelay(1000 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(LEDC.channel_group[test_speed_mode].channel[LEDC_CHANNEL_0].conf0.idle_lv, !current_level);
}
TEST_CASE("LEDC iterate over all channel and timer configs", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
ledc_timer_config_t ledc_time_config = create_default_timer_config();
// use all kinds of speed mode, channel, timer combination to test all of possible configuration
ledc_mode_t speed_mode[LEDC_SPEED_MODE_MAX] = SPEED_MODE_LIST;
ledc_channel_t channels[8] = {LEDC_CHANNEL_0, LEDC_CHANNEL_1, LEDC_CHANNEL_2, LEDC_CHANNEL_3, LEDC_CHANNEL_4, LEDC_CHANNEL_5};
ledc_timer_t timer_select[4] = {LEDC_TIMER_0, LEDC_TIMER_1, LEDC_TIMER_2, LEDC_TIMER_3};
for (int i = 0; i < LEDC_SPEED_MODE_MAX; i++) {
ledc_ch_config.speed_mode = speed_mode[i];
ledc_time_config.speed_mode = speed_mode[i];
for (int j = 0; j < 8; j++) {
ledc_ch_config.channel = channels[j];
for (int k = 0; k < 4; k++) {
ledc_ch_config.timer_sel = timer_select[k];
ledc_time_config.timer_num = timer_select[k];
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
}
}
}
}
TEST_CASE("LEDC memory leak test", "[ledc]")
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
ledc_timer_config_t ledc_time_config = create_default_timer_config();
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
uint32_t size = esp_get_free_heap_size();
uint32_t i;
// install and uninstall for 1000 times to test whether memory leaking exists
for (i = 0; i <= 1000; i++) {
TEST_ESP_OK(ledc_fade_func_install(0));
ledc_fade_func_uninstall();
}
TEST_ASSERT_INT32_WITHIN(100, size, esp_get_free_heap_size());
TEST_ESP_OK(ledc_stop(ledc_time_config.speed_mode, LEDC_CHANNEL_0, 0));
}
// duty should be manually checked from the waveform using a logic analyzer
// this test is enabled only for testting the settings
TEST_CASE("LEDC set and get duty", "[ledc]")
{
ledc_timer_t timer_list[4] = {LEDC_TIMER_0, LEDC_TIMER_1, LEDC_TIMER_2, LEDC_TIMER_3};
ledc_mode_t speed_mode_list[LEDC_SPEED_MODE_MAX] = SPEED_MODE_LIST;
for (int i = 0; i < LEDC_TIMER_MAX - 1; i++) {
for (int j = 0; j < LEDC_SPEED_MODE_MAX; j++) {
timer_duty_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, timer_list[i], speed_mode_list[j]);
}
}
}
TEST_CASE("LEDC fade with time", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
fade_setup();
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 4000, 200));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 0, 200));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT));
// duty should not be too far from initial value
TEST_ASSERT_INT32_WITHIN(20, 4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
vTaskDelay(210 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(0, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
//deinitialize fade service
ledc_fade_func_uninstall();
}
TEST_CASE("LEDC fade with step", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
fade_setup();
TEST_ESP_OK(ledc_set_fade_with_step(test_speed_mode, LEDC_CHANNEL_0, 4000, 4, 1));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ESP_OK(ledc_set_fade_with_step(test_speed_mode, LEDC_CHANNEL_0, 0, 4, 1));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT));
// duty should not be too far from initial value
TEST_ASSERT_INT32_WITHIN(20, 4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
vTaskDelay(525 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(0, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
//scaler=0 check
TEST_ASSERT(ledc_set_fade_with_step(test_speed_mode, LEDC_CHANNEL_0, 4000, 0, 1) == ESP_ERR_INVALID_ARG);
//deinitialize fade service
ledc_fade_func_uninstall();
}
TEST_CASE("LEDC fast switching duty with fade_wait_done", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
fade_setup();
// fade function will block until fading to the target duty
int64_t fade_start, fade_stop;
fade_start = esp_timer_get_time();
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 4000, 200));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 1000, 150));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(1000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
fade_stop = esp_timer_get_time();
int64_t time_ms = (fade_stop - fade_start) / 1000;
TEST_ASSERT_TRUE(llabs(time_ms - 350) < 20);
// next duty update will not take place until last fade reaches its target duty
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 4000, 200));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_WAIT_DONE));
TEST_ASSERT_EQUAL_INT32(4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ESP_OK(ledc_set_duty(test_speed_mode, LEDC_CHANNEL_0, 500));
TEST_ESP_OK(ledc_update_duty(test_speed_mode, LEDC_CHANNEL_0));
vTaskDelay(5 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(500, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
//deinitialize fade service
ledc_fade_func_uninstall();
}
TEST_CASE("LEDC fast switching duty with fade_no_wait", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
fade_setup();
// fade function returns immediately, but next fade still needs to wait for last fade ends
int64_t fade_start, first_fade_complete;
fade_start = esp_timer_get_time();
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 4000, 200));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT));
TEST_ASSERT_LESS_THAN(4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 1000, 150));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT));
first_fade_complete = esp_timer_get_time();
// duty should not be too far from first fade target duty
TEST_ASSERT_INT32_WITHIN(20, 4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
int64_t time_ms = (first_fade_complete - fade_start) / 1000;
TEST_ASSERT_TRUE(llabs(time_ms - 200) < 20);
vTaskDelay(158 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(1000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
// next duty update will not take place until last fade reaches its target duty
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 4000, 200));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT));
TEST_ASSERT_LESS_THAN(4000, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ESP_OK(ledc_set_duty(test_speed_mode, LEDC_CHANNEL_0, 500));
TEST_ESP_OK(ledc_update_duty(test_speed_mode, LEDC_CHANNEL_0));
vTaskDelay(5 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(500, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
//deinitialize fade service
ledc_fade_func_uninstall();
}
#if SOC_LEDC_SUPPORT_FADE_STOP
TEST_CASE("LEDC fade stop test", "[ledc]")
{
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
fade_setup();
int64_t fade_start, fade_stop;
int64_t time_ms = 0;
fade_start = esp_timer_get_time();
TEST_ESP_OK(ledc_set_fade_with_time(test_speed_mode, LEDC_CHANNEL_0, 4000, 500));
TEST_ESP_OK(ledc_fade_start(test_speed_mode, LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT));
// Add some delay before stopping the fade
vTaskDelay(127 / portTICK_PERIOD_MS);
// Get duty value right before stopping the fade
uint32_t duty_before_stop = ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0);
TEST_ESP_OK(ledc_fade_stop(test_speed_mode, LEDC_CHANNEL_0));
fade_stop = esp_timer_get_time();
time_ms = (fade_stop - fade_start) / 1000;
TEST_ASSERT_TRUE(llabs(time_ms - 127) < 20);
// Get duty value after fade_stop returns (give at least one cycle for the duty set in fade_stop to take effective)
uint32_t duty_after_stop = ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0);
TEST_ASSERT_INT32_WITHIN(4, duty_before_stop, duty_after_stop); // 4 is the scale for one step in the last fade
vTaskDelay(300 / portTICK_PERIOD_MS);
// Duty should not change any more after ledc_fade_stop returns
TEST_ASSERT_EQUAL_INT32(duty_after_stop, ledc_get_duty(test_speed_mode, LEDC_CHANNEL_0));
TEST_ASSERT_NOT_EQUAL(4000, duty_after_stop);
//deinitialize fade service
ledc_fade_func_uninstall();
}
#endif // SOC_LEDC_SUPPORT_FADE_STOP
#if SOC_PCNT_SUPPORTED // Note. C3, C2, H2 do not have PCNT peripheral, the following test cases cannot be tested
#include "driver/pulse_cnt.h"
#define HIGHEST_LIMIT 10000
#define LOWEST_LIMIT -10000
static pcnt_unit_handle_t pcnt_unit;
static pcnt_channel_handle_t pcnt_chan;
static void setup_testbench(void)
{
pcnt_unit_config_t unit_config = {
.high_limit = HIGHEST_LIMIT,
.low_limit = LOWEST_LIMIT,
};
TEST_ESP_OK(pcnt_new_unit(&unit_config, &pcnt_unit));
pcnt_chan_config_t chan_config = {
.edge_gpio_num = PULSE_IO,
.level_gpio_num = -1,
};
TEST_ESP_OK(pcnt_new_channel(pcnt_unit, &chan_config, &pcnt_chan));
TEST_ESP_OK(pcnt_channel_set_level_action(pcnt_chan, PCNT_CHANNEL_LEVEL_ACTION_KEEP, PCNT_CHANNEL_LEVEL_ACTION_KEEP));
TEST_ESP_OK(pcnt_channel_set_edge_action(pcnt_chan, PCNT_CHANNEL_EDGE_ACTION_INCREASE, PCNT_CHANNEL_EDGE_ACTION_HOLD));
TEST_ESP_OK(pcnt_unit_enable(pcnt_unit));
}
static void tear_testbench(void)
{
TEST_ESP_OK(pcnt_unit_disable(pcnt_unit));
TEST_ESP_OK(pcnt_del_channel(pcnt_chan));
TEST_ESP_OK(pcnt_del_unit(pcnt_unit));
}
// use PCNT to test the waveform of LEDC
static int wave_count(int last_time)
{
// The input ability of PULSE_IO is disabled after ledc driver install, so we need to reenable it again
PIN_INPUT_ENABLE(GPIO_PIN_MUX_REG[PULSE_IO]);
int test_counter = 0;
TEST_ESP_OK(pcnt_unit_clear_count(pcnt_unit));
TEST_ESP_OK(pcnt_unit_start(pcnt_unit));
vTaskDelay(pdMS_TO_TICKS(last_time));
TEST_ESP_OK(pcnt_unit_stop(pcnt_unit));
TEST_ESP_OK(pcnt_unit_get_count(pcnt_unit, &test_counter));
return test_counter;
}
// the PCNT will count the frequency of it
static void frequency_set_get(ledc_mode_t speed_mode, ledc_timer_t timer, uint32_t freq_hz, int16_t real_freq, int16_t error)
{
int count;
TEST_ESP_OK(ledc_set_freq(speed_mode, timer, freq_hz));
count = wave_count(1000);
TEST_ASSERT_INT16_WITHIN(error, count, real_freq);
TEST_ASSERT_EQUAL_INT32(real_freq, ledc_get_freq(speed_mode, timer));
}
static void timer_frequency_test(ledc_channel_t channel, ledc_timer_bit_t timer_bit, ledc_timer_t timer, ledc_mode_t speed_mode)
{
ledc_channel_config_t ledc_ch_config = {
.gpio_num = PULSE_IO,
.speed_mode = speed_mode,
.channel = channel,
.intr_type = LEDC_INTR_DISABLE,
.timer_sel = timer,
.duty = 4000,
.hpoint = 0,
};
ledc_timer_config_t ledc_time_config = {
.speed_mode = speed_mode,
.duty_resolution = timer_bit,
.timer_num = timer,
.freq_hz = 5000,
.clk_cfg = LEDC_USE_APB_CLK,
};
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 100, 100, 20);
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 5000, 5000, 50);
frequency_set_get(ledc_ch_config.speed_mode, ledc_ch_config.timer_sel, 9000, 8992, 50);
}
TEST_CASE("LEDC set and get frequency", "[ledc][timeout=60][ignore]")
{
setup_testbench();
#if SOC_LEDC_SUPPORT_HS_MODE
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_0, LEDC_HIGH_SPEED_MODE);
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_1, LEDC_HIGH_SPEED_MODE);
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_2, LEDC_HIGH_SPEED_MODE);
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_3, LEDC_HIGH_SPEED_MODE);
#endif // SOC_LEDC_SUPPORT_HS_MODE
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_0, LEDC_LOW_SPEED_MODE);
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_1, LEDC_LOW_SPEED_MODE);
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_2, LEDC_LOW_SPEED_MODE);
timer_frequency_test(LEDC_CHANNEL_0, LEDC_TIMER_13_BIT, LEDC_TIMER_3, LEDC_LOW_SPEED_MODE);
tear_testbench();
}
static void timer_set_clk_src_and_freq_test(ledc_mode_t speed_mode, ledc_clk_cfg_t clk_src, uint32_t duty_res,
uint32_t freq_hz)
{
ledc_timer_config_t ledc_time_config = {
.speed_mode = speed_mode,
.duty_resolution = duty_res,
.timer_num = LEDC_TIMER_0,
.freq_hz = freq_hz,
.clk_cfg = clk_src,
};
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
vTaskDelay(100 / portTICK_PERIOD_MS);
if (clk_src == LEDC_USE_RTC8M_CLK) {
// RTC8M_CLK freq is get from calibration, it is reasonable that divider calculation does a rounding
TEST_ASSERT_UINT32_WITHIN(5, ledc_get_freq(speed_mode, LEDC_TIMER_0), freq_hz);
} else {
TEST_ASSERT_EQUAL_INT32(ledc_get_freq(speed_mode, LEDC_TIMER_0), freq_hz);
}
int count = wave_count(1000);
TEST_ASSERT_UINT32_WITHIN(10, count, freq_hz);
}
TEST_CASE("LEDC timer select specific clock source", "[ledc]")
{
setup_testbench();
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
ledc_channel_config_t ledc_ch_config = {
.gpio_num = PULSE_IO,
.speed_mode = test_speed_mode,
.channel = LEDC_CHANNEL_0,
.intr_type = LEDC_INTR_DISABLE,
.timer_sel = LEDC_TIMER_0,
.duty = 800,
.hpoint = 0,
};
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
if (test_speed_mode == LEDC_LOW_SPEED_MODE) {
printf("Check LEDC_USE_RTC8M_CLK for a 100Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_RTC8M_CLK, 10, 100);
#if SOC_LEDC_SUPPORT_XTAL_CLOCK
printf("Check LEDC_USE_XTAL_CLK for a 400Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_XTAL_CLK, 13, 400);
#endif
}
#if SOC_LEDC_SUPPORT_REF_TICK
printf("Check LEDC_USE_REF_TICK for a 250Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_REF_TICK, 10, 250);
#endif
#if SOC_LEDC_SUPPORT_APB_CLOCK
printf("Check LEDC_USE_APB_CLK for a 500Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_APB_CLK, 13, 500);
#endif
#if SOC_LEDC_SUPPORT_PLL_DIV_CLOCK
printf("Check LEDC_USE_PLL_DIV_CLK for a 500Hz signal\n");
timer_set_clk_src_and_freq_test(test_speed_mode, LEDC_USE_PLL_DIV_CLK, 13, 500);
#endif
printf("Bind channel 0 to timer 0\n");
TEST_ESP_OK(ledc_bind_channel_timer(test_speed_mode, LEDC_CHANNEL_0, LEDC_TIMER_0));
vTaskDelay(1000 / portTICK_PERIOD_MS);
TEST_ASSERT_EQUAL_INT32(ledc_get_freq(test_speed_mode, LEDC_TIMER_0), 500);
tear_testbench();
}
TEST_CASE("LEDC timer pause and resume", "[ledc]")
{
setup_testbench();
const ledc_mode_t test_speed_mode = TEST_SPEED_MODE;
int count;
ledc_channel_config_t ledc_ch_config = {
.gpio_num = PULSE_IO,
.speed_mode = test_speed_mode,
.channel = LEDC_CHANNEL_0,
.intr_type = LEDC_INTR_DISABLE,
.timer_sel = LEDC_TIMER_0,
.duty = 4000,
.hpoint = 0,
};
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
ledc_timer_config_t ledc_time_config = {
.speed_mode = test_speed_mode,
.duty_resolution = LEDC_TIMER_13_BIT,
.timer_num = LEDC_TIMER_0,
.freq_hz = 5000,
.clk_cfg = TEST_DEFAULT_CLK_CFG,
};
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
vTaskDelay(10 / portTICK_PERIOD_MS);
count = wave_count(1000);
TEST_ASSERT_INT16_WITHIN(5, count, 5000);
//pause ledc timer, when pause it, will get no waveform count
printf("Pause ledc timer\n");
TEST_ESP_OK(ledc_timer_pause(test_speed_mode, LEDC_TIMER_0));
vTaskDelay(10 / portTICK_PERIOD_MS);
count = wave_count(1000);
TEST_ASSERT_INT16_WITHIN(5, count, 0);
TEST_ASSERT_EQUAL_UINT32(count, 0);
//resume ledc timer
printf("Resume ledc timer\n");
TEST_ESP_OK(ledc_timer_resume(test_speed_mode, LEDC_TIMER_0));
vTaskDelay(10 / portTICK_PERIOD_MS);
count = wave_count(1000);
TEST_ASSERT_UINT32_WITHIN(5, count, 5000);
//reset ledc timer
printf("reset ledc timer\n");
TEST_ESP_OK(ledc_timer_rst(test_speed_mode, LEDC_TIMER_0));
vTaskDelay(100 / portTICK_PERIOD_MS);
TEST_ASSERT_UINT32_WITHIN(5, count, 5000);
tear_testbench();
}
static void ledc_cpu_reset_test_first_stage(void)
{
ledc_channel_config_t ledc_ch_config = initialize_channel_config();
TEST_ESP_OK(ledc_channel_config(&ledc_ch_config));
ledc_timer_config_t ledc_time_config = create_default_timer_config();
TEST_ESP_OK(ledc_timer_config(&ledc_time_config));
vTaskDelay(50 / portTICK_PERIOD_MS);
esp_restart();
}
static void ledc_cpu_reset_test_second_stage(void)
{
int count;
TEST_ASSERT_EQUAL(ESP_RST_SW, esp_reset_reason());
setup_testbench();
// reconfigure the GPIO again, as the GPIO output ability has been disabled during initialize pcnt peripheral
ledc_set_pin(PULSE_IO, TEST_SPEED_MODE, LEDC_CHANNEL_0);
count = wave_count(1000);
TEST_ASSERT_UINT32_WITHIN(5, TEST_PWM_FREQ, count);
tear_testbench();
}
TEST_CASE_MULTIPLE_STAGES("LEDC continue work after software reset", "[ledc]",
ledc_cpu_reset_test_first_stage,
ledc_cpu_reset_test_second_stage);
#endif // SOC_PCNT_SUPPORTED