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esp_hw_support: Fix time spent in light sleep when RTC is used for gettimeofday

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The esp_timer was not advanced correctly.
This commit is contained in:
KonstantinKondrashov 2022-04-12 01:50:08 +08:00
parent 466e8702b8
commit 1e0eef52d3
4 changed files with 27 additions and 8 deletions
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8
components/esp_hw_support/sleep_modes.c
View File

@ -620,7 +620,7 @@ esp_err_t esp_light_sleep_start(void)
s_config.rtc_ticks_at_sleep_start = rtc_time_get();
uint32_t ccount_at_sleep_start = cpu_ll_get_cycle_count();
uint64_t high_res_time_at_start = esp_system_get_time();
uint64_t high_res_time_at_start = esp_timer_get_time();
uint32_t sleep_time_overhead_in = (ccount_at_sleep_start - s_config.ccount_ticks_record) / (esp_clk_cpu_freq() / 1000000ULL);
esp_ipc_isr_stall_other_cpu();
@ -723,14 +723,14 @@ esp_err_t esp_light_sleep_start(void)
// System timer has been clock gated for the duration of the sleep, correct for that.
#ifdef CONFIG_IDF_TARGET_ESP32C3
/**
* On esp32c3, rtc_time_get() is non-blocking, esp_system_get_time() is
* On esp32c3, rtc_time_get() is non-blocking, esp_timer_get_time() is
* blocking, and the measurement data shows that this order is better.
*/
uint64_t high_res_time_at_end = esp_system_get_time();
uint64_t high_res_time_at_end = esp_timer_get_time();
uint64_t rtc_ticks_at_end = rtc_time_get();
#else
uint64_t rtc_ticks_at_end = rtc_time_get();
uint64_t high_res_time_at_end = esp_system_get_time();
uint64_t high_res_time_at_end = esp_timer_get_time();
#endif
uint64_t rtc_time_diff = rtc_time_slowclk_to_us(rtc_ticks_at_end - s_config.rtc_ticks_at_sleep_start, s_config.rtc_clk_cal_period);

10
examples/system/esp_timer/main/esp_timer_example_main.c
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@ -61,14 +61,16 @@ void app_main(void)
/* Timekeeping continues in light sleep, and timers are scheduled
* correctly after light sleep.
*/
ESP_LOGI(TAG, "Entering light sleep for 0.5s, time since boot: %lld us",
esp_timer_get_time());
int64_t t1 = esp_timer_get_time();
ESP_LOGI(TAG, "Entering light sleep for 0.5s, time since boot: %lld us", t1);
ESP_ERROR_CHECK(esp_sleep_enable_timer_wakeup(500000));
esp_light_sleep_start();
ESP_LOGI(TAG, "Woke up from light sleep, time since boot: %lld us",
esp_timer_get_time());
int64_t t2 = esp_timer_get_time();
ESP_LOGI(TAG, "Woke up from light sleep, time since boot: %lld us", t2);
assert(abs((t2 - t1) - 500000) < 1000);
/* Let the timer run for a little bit more */
usleep(2000000);

7
examples/system/esp_timer/pytest_esp_timer.py
View File

@ -30,6 +30,13 @@ ONE_SHOT_TIMER_PERIOD = 5000000
@pytest.mark.supported_targets
@pytest.mark.generic
@pytest.mark.parametrize(
'config',
[
'rtc',
],
indirect=True
)
def test_esp_timer(dut: Dut) -> None:
match = dut.expect(STARTING_TIMERS_REGEX)

10
examples/system/esp_timer/sdkconfig.ci.rtc Normal file
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@ -0,0 +1,10 @@
# For ESP32-S3 and ESP32-C3, keep secondary console disabled
# This is to avoid any timing impact on test behavior
CONFIG_ESP_CONSOLE_SECONDARY_NONE=y
CONFIG_ESP32_TIME_SYSCALL_USE_RTC=y
CONFIG_ESP32S2_TIME_SYSCALL_USE_RTC=y
CONFIG_ESP32S3_TIME_SYSCALL_USE_RTC=y
CONFIG_ESP32C2_TIME_SYSCALL_USE_RTC=y
CONFIG_ESP32C3_TIME_SYSCALL_USE_RTC=y
CONFIG_ESP32H2_TIME_SYSCALL_USE_RTC=y