esp-idf/components/driver/test_apps/gpio_extensions/main/test_sdm.c

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/*
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* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "unity.h"
#include "driver/sdm.h"
#include "soc/soc_caps.h"
#include "esp_attr.h"
TEST_CASE("sdm_channel_install_uninstall", "[sdm]")
{
printf("install sdm channels exhaustively\r\n");
sdm_config_t config = {
.clk_src = SDM_CLK_SRC_DEFAULT,
.sample_rate_hz = 1000000,
.gpio_num = 0,
};
sdm_channel_handle_t chans[SOC_SDM_GROUPS][SOC_SDM_CHANNELS_PER_GROUP] = {};
for (int i = 0; i < SOC_SDM_GROUPS; i++) {
for (int j = 0; j < SOC_SDM_CHANNELS_PER_GROUP; j++) {
TEST_ESP_OK(sdm_new_channel(&config, &chans[i][j]));
}
TEST_ESP_ERR(ESP_ERR_NOT_FOUND, sdm_new_channel(&config, &chans[0][0]));
}
printf("delete sdm channels\r\n");
for (int i = 0; i < SOC_SDM_GROUPS; i++) {
for (int j = 0; j < SOC_SDM_CHANNELS_PER_GROUP; j++) {
TEST_ESP_OK(sdm_del_channel(chans[i][j]));
}
}
}
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TEST_CASE("sdm_channel_set_pulse_density", "[sdm]")
{
const int sdm_chan_gpios[2] = {0, 2};
sdm_config_t config = {
.clk_src = SDM_CLK_SRC_DEFAULT,
.sample_rate_hz = 1000000,
};
sdm_channel_handle_t chans[2] = {};
for (size_t i = 0; i < 2; i++) {
config.gpio_num = sdm_chan_gpios[i];
TEST_ESP_OK(sdm_new_channel(&config, &chans[i]));
// should see a ~250KHz (sample_rate/4) square wave
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TEST_ESP_OK(sdm_channel_set_pulse_density(chans[i], 0));
TEST_ESP_OK(sdm_channel_enable(chans[i]));
}
vTaskDelay(pdMS_TO_TICKS(500));
// can't delete the channel if the channel is in the enable state
TEST_ESP_ERR(ESP_ERR_INVALID_STATE, sdm_del_channel(chans[0]));
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TEST_ESP_OK(sdm_channel_set_pulse_density(chans[0], 127));
TEST_ESP_OK(sdm_channel_set_pulse_density(chans[1], -128));
vTaskDelay(pdMS_TO_TICKS(500));
for (size_t i = 0; i < 2; i++) {
TEST_ESP_OK(sdm_channel_disable(chans[i]));
TEST_ESP_OK(sdm_del_channel(chans[i]));
}
}