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light sleep: overhead time accuracy optimization for esp32c3

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This commit is contained in:
Li Shuai
2020-12-04 11:09:21 +08:00
parent aa7fd175b9
commit ac7d1bec76
4 changed files with 41 additions and 34 deletions
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62
components/esp_system/sleep_modes.c
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@@ -82,42 +82,32 @@
#define RTC_CLK_SRC_CAL_CYCLES (10)
#ifdef CONFIG_IDF_TARGET_ESP32
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (212)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (60)
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (212)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (60)
#elif CONFIG_IDF_TARGET_ESP32S2
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (147)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (28)
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (147)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (28)
#elif CONFIG_IDF_TARGET_ESP32S3
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32S3_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (0)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (0)
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32S3_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (0)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (0)
#elif CONFIG_IDF_TARGET_ESP32C3
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_CPU_FREQ_MHZ CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ
#define DEFAULT_SLEEP_OUT_OVERHEAD_US (105)
#define DEFAULT_HARDWARE_OUT_OVERHEAD_US (37)
#endif
#if defined(CONFIG_IDF_TARGET_ESP32) || defined(CONFIG_IDF_TARGET_ESP32S2)
#define LIGHT_SLEEP_TIME_OVERHEAD_US DEFAULT_HARDWARE_OUT_OVERHEAD_US
#if defined(CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS) || defined (CONFIG_ESP32S2_RTC_CLK_SRC_EXT_CRYS)
#define DEEP_SLEEP_TIME_OVERHEAD_US (650 + 100 * 240 / DEFAULT_CPU_FREQ_MHZ)
#define LIGHT_SLEEP_TIME_OVERHEAD_US DEFAULT_HARDWARE_OUT_OVERHEAD_US
#if defined(CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS) || \
defined(CONFIG_ESP32S2_RTC_CLK_SRC_EXT_CRYS) || \
defined(CONFIG_ESP32C3_RTC_CLK_SRC_EXT_CRYS) || \
defined(CONFIG_ESP32S3_RTC_CLK_SRC_EXT_CRYS)
#define DEEP_SLEEP_TIME_OVERHEAD_US (650 + 100 * 240 / DEFAULT_CPU_FREQ_MHZ)
#else
#define DEEP_SLEEP_TIME_OVERHEAD_US (250 + 100 * 240 / DEFAULT_CPU_FREQ_MHZ)
#endif // defined(CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS) || defined (CONFIG_ESP32S2_RTC_CLK_SRC_EXT_CRYS)
#elif defined(CONFIG_IDF_TARGET_ESP32C3)
#ifdef CONFIG_ESP32C3_RTC_CLK_SRC_EXT_CRYS
#define LIGHT_SLEEP_TIME_OVERHEAD_US (650 + 30 * 240 / CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ)
#define DEEP_SLEEP_TIME_OVERHEAD_US (650 + 100 * 240 / CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ)
#else
#define LIGHT_SLEEP_TIME_OVERHEAD_US (250 + 30 * 240 / CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ)
#define DEEP_SLEEP_TIME_OVERHEAD_US (250 + 100 * 240 / CONFIG_ESP32C3_DEFAULT_CPU_FREQ_MHZ)
#endif // CONFIG_ESP32C3_RTC_CLK_SRC_EXT_CRYS
#else // other target
#define LIGHT_SLEEP_TIME_OVERHEAD_US 0
#define DEEP_SLEEP_TIME_OVERHEAD_US 0
#endif // CONFIG_IDF_TARGET_*
#define DEEP_SLEEP_TIME_OVERHEAD_US (250 + 100 * 240 / DEFAULT_CPU_FREQ_MHZ)
#endif
#if defined(CONFIG_IDF_TARGET_ESP32) && defined(CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY)
#define DEEP_SLEEP_WAKEUP_DELAY CONFIG_ESP32_DEEP_SLEEP_WAKEUP_DELAY
@@ -457,6 +447,7 @@ static uint32_t IRAM_ATTR esp_sleep_start(uint32_t pd_flags)
#if CONFIG_GPIO_ESP32_SUPPORT_SWITCH_SLP_PULL
gpio_sleep_mode_config_unapply();
#endif
// re-enable UART output
resume_uarts();
@@ -553,7 +544,7 @@ esp_err_t esp_light_sleep_start(void)
uint32_t pd_flags = get_power_down_flags();
// Re-calibrate the RTC Timer clock
#if defined(CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS) || defined(CONFIG_ESP32S2_RTC_CLK_SRC_EXT_CRYS)
#if defined(CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS) || defined(CONFIG_ESP32S2_RTC_CLK_SRC_EXT_CRYS) || defined(CONFIG_ESP32C3_RTC_CLK_SRC_EXT_CRYS)
uint64_t time_per_us = 1000000ULL;
s_config.rtc_clk_cal_period = (time_per_us << RTC_CLK_CAL_FRACT) / rtc_clk_slow_freq_get_hz();
#elif defined(CONFIG_ESP32S2_RTC_CLK_SRC_INT_RC)
@@ -631,8 +622,17 @@ esp_err_t esp_light_sleep_start(void)
s_light_sleep_wakeup = true;
// FRC1 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
* blocking, and the measurement data shows that this order is better.
*/
uint64_t frc_time_at_end = esp_system_get_time();
uint64_t rtc_ticks_at_end = rtc_time_get();
#else
uint64_t rtc_ticks_at_end = rtc_time_get();
uint64_t frc_time_at_end = esp_system_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);
uint64_t frc_time_diff = frc_time_at_end - frc_time_at_start;