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

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#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "unity.h"
#include "test_utils.h"
#include "soc/soc_caps.h"
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#include "driver/sigmadelta.h"
TEST_CASE("Sigma-Delta config test", "[sigma_delta]")
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{
sigmadelta_config_t sigmadelta_cfg = {
.sigmadelta_prescale = 80,
.sigmadelta_duty = 45,
.sigmadelta_gpio = 4,
};
for (int i = 0; i < SOC_SIGMADELTA_CHANNEL_NUM; i++) {
sigmadelta_cfg.channel = i;
TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
}
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sigmadelta_cfg.channel = SOC_SIGMADELTA_CHANNEL_NUM;
TEST_ASSERT_EQUAL_MESSAGE(ESP_ERR_INVALID_ARG, sigmadelta_config(&sigmadelta_cfg), "wrong channel number should be inspected");
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}
// connect GPIO4 with LED positive pin, and the GND pin connect LED negative pin
// logic analyzer help also to see the wave form(more standard and accurate)
TEST_CASE("SigmaDelta pin, duty, prescale set", "[sigma_delta][ignore]")
{
sigmadelta_config_t sigmadelta_cfg = {
.channel = 0,
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.sigmadelta_prescale = 80,
.sigmadelta_duty = 0,
.sigmadelta_gpio = 4,
};
TEST_ESP_OK(sigmadelta_config(&sigmadelta_cfg));
int8_t duty = 0;
int inc = 1;
for (int i = 0; i < 1000; i++) {
sigmadelta_set_duty(0, duty);
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vTaskDelay(10 / portTICK_PERIOD_MS);
duty += inc;
if (duty == 127 || duty == -127) {
inc = (-1) * inc;
}
}
TEST_ESP_OK(sigmadelta_set_prescale(0, 200));
for (int i = 0; i < 1000; i++) {
sigmadelta_set_duty(0, duty);
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vTaskDelay(10 / portTICK_PERIOD_MS);
duty += inc;
if (duty == 127 || duty == -127) {
inc = (-1) * inc;
}
}
TEST_ESP_OK(sigmadelta_set_pin(0, 5));
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vTaskDelay(3000 / portTICK_PERIOD_MS);
}