313 lines
9.8 KiB
C
313 lines
9.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/param.h>
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#include "unity.h"
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#include "esp_pm.h"
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#include "esp_clk.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/semphr.h"
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#include "esp_log.h"
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#include "driver/timer.h"
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#include "driver/rtc_io.h"
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#include "esp32/ulp.h"
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#include "soc/rtc_io_reg.h"
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#include "soc/rtc_cntl_reg.h"
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#include "soc/rtc_gpio_channel.h"
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TEST_CASE("Can dump power management lock stats", "[pm]")
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{
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esp_pm_dump_locks(stdout);
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}
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#ifdef CONFIG_PM_ENABLE
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static void switch_freq(int mhz)
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{
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int xtal_freq = rtc_clk_xtal_freq_get();
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esp_pm_config_esp32_t pm_config = {
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.max_freq_mhz = mhz,
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.min_freq_mhz = MIN(mhz, xtal_freq),
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};
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ESP_ERROR_CHECK( esp_pm_configure(&pm_config) );
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printf("Waiting for frequency to be set to %d MHz...\n", mhz);
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while (esp_clk_cpu_freq() / 1000000 != mhz) {
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vTaskDelay(pdMS_TO_TICKS(200));
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printf("Frequency is %d MHz\n", esp_clk_cpu_freq() / 1000000);
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}
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}
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TEST_CASE("Can switch frequency using esp_pm_configure", "[pm]")
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{
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int orig_freq_mhz = esp_clk_cpu_freq() / 1000000;
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switch_freq(240);
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switch_freq(40);
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switch_freq(160);
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switch_freq(240);
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switch_freq(80);
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switch_freq(40);
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switch_freq(240);
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switch_freq(40);
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switch_freq(80);
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switch_freq(10);
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switch_freq(80);
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switch_freq(20);
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switch_freq(40);
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switch_freq(orig_freq_mhz);
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}
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#if CONFIG_FREERTOS_USE_TICKLESS_IDLE
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static void light_sleep_enable()
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{
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const esp_pm_config_esp32_t pm_config = {
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.max_cpu_freq = rtc_clk_cpu_freq_get(),
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.min_cpu_freq = RTC_CPU_FREQ_XTAL,
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.light_sleep_enable = true
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};
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ESP_ERROR_CHECK( esp_pm_configure(&pm_config) );
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}
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static void light_sleep_disable()
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{
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const esp_pm_config_esp32_t pm_config = {
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.max_cpu_freq = rtc_clk_cpu_freq_get(),
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.min_cpu_freq = rtc_clk_cpu_freq_get(),
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};
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ESP_ERROR_CHECK( esp_pm_configure(&pm_config) );
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}
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TEST_CASE("Automatic light occurs when tasks are suspended", "[pm]")
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{
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/* To figure out if light sleep takes place, use Timer Group timer.
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* It will stop working while in light sleep.
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*/
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timer_config_t config = {
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.counter_dir = TIMER_COUNT_UP,
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.divider = 80 /* 1 us per tick */
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};
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timer_init(TIMER_GROUP_0, TIMER_0, &config);
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timer_set_counter_value(TIMER_GROUP_0, TIMER_0, 0);
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timer_start(TIMER_GROUP_0, TIMER_0);
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light_sleep_enable();
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for (int ticks_to_delay = CONFIG_FREERTOS_IDLE_TIME_BEFORE_SLEEP;
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ticks_to_delay < CONFIG_FREERTOS_IDLE_TIME_BEFORE_SLEEP * 10;
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++ticks_to_delay) {
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/* Wait until next tick */
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vTaskDelay(1);
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/* The following delay should cause light sleep to start */
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uint64_t count_start;
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timer_get_counter_value(TIMER_GROUP_0, TIMER_0, &count_start);
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vTaskDelay(ticks_to_delay);
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uint64_t count_end;
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timer_get_counter_value(TIMER_GROUP_0, TIMER_0, &count_end);
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int timer_diff_us = (int) (count_end - count_start);
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const int us_per_tick = 1 * portTICK_PERIOD_MS * 1000;
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printf("%d %d\n", ticks_to_delay * us_per_tick, timer_diff_us);
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TEST_ASSERT(timer_diff_us < ticks_to_delay * us_per_tick);
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}
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light_sleep_disable();
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}
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TEST_CASE("Can wake up from automatic light sleep by GPIO", "[pm]")
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{
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assert(CONFIG_ULP_COPROC_RESERVE_MEM >= 16 && "this test needs ULP_COPROC_RESERVE_MEM option set in menuconfig");
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/* Set up GPIO used to wake up RTC */
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const int ext1_wakeup_gpio = 25;
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const int ext_rtc_io = RTCIO_GPIO25_CHANNEL;
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TEST_ESP_OK(rtc_gpio_init(ext1_wakeup_gpio));
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rtc_gpio_set_direction(ext1_wakeup_gpio, RTC_GPIO_MODE_INPUT_OUTPUT);
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rtc_gpio_set_level(ext1_wakeup_gpio, 0);
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/* Enable wakeup */
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TEST_ESP_OK(esp_sleep_enable_ext1_wakeup(1ULL << ext1_wakeup_gpio, ESP_EXT1_WAKEUP_ANY_HIGH));
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/* To simplify test environment, we'll use a ULP program to set GPIO high */
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ulp_insn_t ulp_code[] = {
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I_DELAY(65535), /* about 8ms, given 8MHz ULP clock */
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I_WR_REG_BIT(RTC_CNTL_HOLD_FORCE_REG, RTC_CNTL_PDAC1_HOLD_FORCE_S, 0),
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I_WR_REG_BIT(RTC_GPIO_OUT_REG, ext_rtc_io + RTC_GPIO_OUT_DATA_S, 1),
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I_DELAY(1000),
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I_WR_REG_BIT(RTC_GPIO_OUT_REG, ext_rtc_io + RTC_GPIO_OUT_DATA_S, 0),
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I_WR_REG_BIT(RTC_CNTL_HOLD_FORCE_REG, RTC_CNTL_PDAC1_HOLD_FORCE_S, 1),
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I_END(),
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I_HALT()
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};
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TEST_ESP_OK(ulp_set_wakeup_period(0, 1000 /* us */));
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size_t size = sizeof(ulp_code)/sizeof(ulp_insn_t);
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TEST_ESP_OK(ulp_process_macros_and_load(0, ulp_code, &size));
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light_sleep_enable();
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for (int i = 0; i < 10; ++i) {
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/* Set GPIO low */
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REG_CLR_BIT(rtc_gpio_desc[ext1_wakeup_gpio].reg, rtc_gpio_desc[ext1_wakeup_gpio].hold_force);
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rtc_gpio_set_level(ext1_wakeup_gpio, 0);
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REG_SET_BIT(rtc_gpio_desc[ext1_wakeup_gpio].reg, rtc_gpio_desc[ext1_wakeup_gpio].hold_force);
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/* Wait for the next tick */
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vTaskDelay(1);
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/* Start ULP program */
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ulp_run(0);
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const int delay_ms = 200;
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const int delay_ticks = delay_ms / portTICK_PERIOD_MS;
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int64_t start_rtc = esp_clk_rtc_time();
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int64_t start_hs = esp_timer_get_time();
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uint32_t start_tick = xTaskGetTickCount();
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/* Will enter sleep here */
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vTaskDelay(delay_ticks);
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int64_t end_rtc = esp_clk_rtc_time();
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int64_t end_hs = esp_timer_get_time();
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uint32_t end_tick = xTaskGetTickCount();
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printf("%lld %lld %u\n", end_rtc - start_rtc, end_hs - start_hs, end_tick - start_tick);
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TEST_ASSERT_INT32_WITHIN(3, delay_ticks, end_tick - start_tick);
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TEST_ASSERT_INT32_WITHIN(2 * portTICK_PERIOD_MS * 1000, delay_ms * 1000, end_hs - start_hs);
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TEST_ASSERT_INT32_WITHIN(2 * portTICK_PERIOD_MS * 1000, delay_ms * 1000, end_rtc - start_rtc);
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}
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REG_CLR_BIT(rtc_gpio_desc[ext1_wakeup_gpio].reg, rtc_gpio_desc[ext1_wakeup_gpio].hold_force);
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rtc_gpio_deinit(ext1_wakeup_gpio);
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light_sleep_disable();
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}
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typedef struct {
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int delay_us;
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int result;
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SemaphoreHandle_t done;
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} delay_test_arg_t;
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static void test_delay_task(void* p)
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{
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delay_test_arg_t* arg = (delay_test_arg_t*) p;
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vTaskDelay(1);
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uint64_t start = esp_clk_rtc_time();
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vTaskDelay(arg->delay_us / portTICK_PERIOD_MS / 1000);
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uint64_t stop = esp_clk_rtc_time();
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arg->result = (int) (stop - start);
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xSemaphoreGive(arg->done);
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vTaskDelete(NULL);
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}
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TEST_CASE("vTaskDelay duration is correct with light sleep enabled", "[pm]")
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{
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light_sleep_enable();
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delay_test_arg_t args = {
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.done = xSemaphoreCreateBinary()
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};
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const int delays[] = { 10, 20, 50, 100, 150, 200, 250 };
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const int delays_count = sizeof(delays) / sizeof(delays[0]);
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for (int i = 0; i < delays_count; ++i) {
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int delay_ms = delays[i];
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args.delay_us = delay_ms * 1000;
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xTaskCreatePinnedToCore(test_delay_task, "", 2048, (void*) &args, 3, NULL, 0);
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TEST_ASSERT( xSemaphoreTake(args.done, delay_ms * 10 / portTICK_PERIOD_MS) );
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printf("CPU0: %d %d\n", args.delay_us, args.result);
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TEST_ASSERT_INT32_WITHIN(1000 * portTICK_PERIOD_MS * 2, args.delay_us, args.result);
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#if portNUM_PROCESSORS == 2
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xTaskCreatePinnedToCore(test_delay_task, "", 2048, (void*) &args, 3, NULL, 1);
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TEST_ASSERT( xSemaphoreTake(args.done, delay_ms * 10 / portTICK_PERIOD_MS) );
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printf("CPU1: %d %d\n", args.delay_us, args.result);
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TEST_ASSERT_INT32_WITHIN(1000 * portTICK_PERIOD_MS * 2, args.delay_us, args.result);
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#endif
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}
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vSemaphoreDelete(args.done);
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light_sleep_disable();
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}
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/* This test is similar to the one in test_esp_timer.c, but since we can't use
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* ref_clock, this test uses RTC clock for timing. Also enables automatic
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* light sleep.
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*/
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TEST_CASE("esp_timer produces correct delays with light sleep", "[pm]")
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{
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// no, we can't make this a const size_t (§6.7.5.2)
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#define NUM_INTERVALS 16
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typedef struct {
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esp_timer_handle_t timer;
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size_t cur_interval;
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int intervals[NUM_INTERVALS];
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int64_t t_start;
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SemaphoreHandle_t done;
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} test_args_t;
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void timer_func(void* arg)
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{
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test_args_t* p_args = (test_args_t*) arg;
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int64_t t_end = esp_clk_rtc_time();
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int32_t ms_diff = (t_end - p_args->t_start) / 1000;
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printf("timer #%d %dms\n", p_args->cur_interval, ms_diff);
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p_args->intervals[p_args->cur_interval++] = ms_diff;
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// Deliberately make timer handler run longer.
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// We check that this doesn't affect the result.
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ets_delay_us(10*1000);
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if (p_args->cur_interval == NUM_INTERVALS) {
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printf("done\n");
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TEST_ESP_OK(esp_timer_stop(p_args->timer));
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xSemaphoreGive(p_args->done);
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}
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}
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light_sleep_enable();
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const int delay_ms = 100;
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test_args_t args = {0};
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esp_timer_handle_t timer1;
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esp_timer_create_args_t create_args = {
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.callback = &timer_func,
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.arg = &args,
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.name = "timer1",
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};
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TEST_ESP_OK(esp_timer_create(&create_args, &timer1));
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args.timer = timer1;
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args.t_start = esp_clk_rtc_time();
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args.done = xSemaphoreCreateBinary();
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TEST_ESP_OK(esp_timer_start_periodic(timer1, delay_ms * 1000));
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TEST_ASSERT(xSemaphoreTake(args.done, delay_ms * NUM_INTERVALS * 2));
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TEST_ASSERT_EQUAL_UINT32(NUM_INTERVALS, args.cur_interval);
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for (size_t i = 0; i < NUM_INTERVALS; ++i) {
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TEST_ASSERT_INT32_WITHIN(portTICK_PERIOD_MS, (i + 1) * delay_ms, args.intervals[i]);
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}
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TEST_ESP_OK( esp_timer_dump(stdout) );
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TEST_ESP_OK( esp_timer_delete(timer1) );
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vSemaphoreDelete(args.done);
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light_sleep_disable();
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#undef NUM_INTERVALS
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}
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#endif // CONFIG_FREERTOS_USE_TICKLESS_IDLE
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#endif // CONFIG_PM_ENABLE
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