arch/esp32: Introduce the ESP32_RTC option.
Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
This commit is contained in:
Abdelatif Guettouche
Petro Karashchenko
parent
63cb11cc72
commit
770147ffe3
@ -211,44 +211,6 @@ config ESP32_XTAL_26MHz
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endchoice # On-board Crystal Frequency
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choice ESP32_RTC_CLK_SRC
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prompt "RTC clock source"
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default ESP32_RTC_CLK_SRC_INT_RC
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---help---
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Choose which clock is used as RTC clock source.
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- "Internal 150kHz oscillator" option provides lowest deep sleep current
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consumption, and does not require extra external components. However
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frequency stability with respect to temperature is poor, so time may
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drift in deep/light sleep modes.
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- "External 32kHz crystal" provides better frequency stability, at the
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expense of slightly higher (1uA) deep sleep current consumption.
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- "External 32kHz oscillator" allows using 32kHz clock generated by an
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external circuit. In this case, external clock signal must be connected
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to 32K_XN pin. Amplitude should be <1.2V in case of sine wave signal,
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and <1V in case of square wave signal. Common mode voltage should be
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0.1 < Vcm < 0.5Vamp, where Vamp is the signal amplitude.
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Additionally, 1nF capacitor must be connected between 32K_XP pin and
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ground. 32K_XP pin can not be used as a GPIO in this case.
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- "Internal 8.5MHz oscillator divided by 256" option results in higher
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deep sleep current (by 5uA) but has better frequency stability than
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the internal 150kHz oscillator. It does not require external components.
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config ESP32_RTC_CLK_SRC_INT_RC
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bool "Internal 150kHz RC oscillator"
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config ESP32_RTC_CLK_SRC_EXT_XTAL
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bool "External 32kHz crystal"
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select ESP_SYSTEM_RTC_EXT_XTAL
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config ESP32_RTC_CLK_SRC_EXT_OSC
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bool "External 32kHz oscillator at 32K_XN pin"
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config ESP32_RTC_CLK_SRC_INT_8MD256
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bool "Internal 8.5MHz oscillator, divided by 256 (~33kHz)"
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endchoice
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config ESP32_RT_TIMER
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bool "Real-time Timer"
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default n
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@ -483,6 +445,10 @@ config ESP32_RWDT
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to have the RTC module reset, please, use the Timers' Module WDTs.
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They will only reset Main System.
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config ESP32_RTC
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bool "Real Time Clock (RTC)"
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default y
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config ESP32_UART0
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bool "UART 0"
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default n
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@ -1430,6 +1396,48 @@ config ESP32_FREERUN
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endmenu # Timer/counter Configuration
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endif # ESP32_TIMER
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menu "RTC Configuration"
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depends on ESP32_RTC
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choice ESP32_RTC_CLK_SRC
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prompt "RTC clock source"
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default ESP32_RTC_CLK_SRC_INT_RC
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---help---
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Choose which clock is used as RTC clock source.
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- "Internal 150kHz oscillator" option provides lowest deep sleep current
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consumption, and does not require extra external components. However
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frequency stability with respect to temperature is poor, so time may
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drift in deep/light sleep modes.
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- "External 32kHz crystal" provides better frequency stability, at the
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expense of slightly higher (1uA) deep sleep current consumption.
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- "External 32kHz oscillator" allows using 32kHz clock generated by an
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external circuit. In this case, external clock signal must be connected
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to 32K_XN pin. Amplitude should be <1.2V in case of sine wave signal,
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and <1V in case of square wave signal. Common mode voltage should be
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0.1 < Vcm < 0.5Vamp, where Vamp is the signal amplitude.
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Additionally, 1nF capacitor must be connected between 32K_XP pin and
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ground. 32K_XP pin can not be used as a GPIO in this case.
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- "Internal 8.5MHz oscillator divided by 256" option results in higher
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deep sleep current (by 5uA) but has better frequency stability than
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the internal 150kHz oscillator. It does not require external components.
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config ESP32_RTC_CLK_SRC_INT_RC
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bool "Internal 150kHz RC oscillator"
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config ESP32_RTC_CLK_SRC_EXT_XTAL
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bool "External 32kHz crystal"
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select ESP_SYSTEM_RTC_EXT_XTAL
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config ESP32_RTC_CLK_SRC_EXT_OSC
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bool "External 32kHz oscillator at 32K_XN pin"
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config ESP32_RTC_CLK_SRC_INT_8MD256
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bool "Internal 8.5MHz oscillator, divided by 256 (~33kHz)"
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endchoice
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endmenu # "RTC Configuration"
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menu "LEDC configuration"
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depends on ESP32_LEDC
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@ -58,8 +58,6 @@ endif
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CHIP_CSRCS += esp32_pm.c
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endif
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CHIP_CSRCS += esp32_rtc.c
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ifeq ($(CONFIG_XTENSA_IMEM_USE_SEPARATE_HEAP),y)
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CHIP_CSRCS += esp32_imm.c
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endif
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@ -177,9 +175,12 @@ ifeq ($(CONFIG_ESP32_AES_ACCELERATOR),y)
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CHIP_CSRCS += esp32_aes.c
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endif
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ifeq ($(CONFIG_ESP32_RTC),y)
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CHIP_CSRCS += esp32_rtc.c
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ifeq ($(CONFIG_RTC_DRIVER),y)
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CHIP_CSRCS += esp32_rtc_lowerhalf.c
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endif
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endif
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ifeq ($(CONFIG_ESP32_WIRELESS),y)
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WIRELESS_DRV_UNPACK = esp-wireless-drivers-3rdparty
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@ -157,13 +157,11 @@
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.fe_pd = (val), \
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}
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#ifdef CONFIG_RTC_DRIVER
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/* The magic data for the struct esp32_rtc_backup_s that is in RTC slow
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* memory.
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*/
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# define MAGIC_RTC_SAVE (UINT64_C(0x11223344556677))
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#endif
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#define MAGIC_RTC_SAVE UINT64_C(0x11223344556677)
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/* RTC Memory & Store Register usage */
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@ -228,8 +226,6 @@ struct esp32_rtc_sleep_pd_config_s
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uint32_t fe_pd : 1; /* Set to 1 to power down Wi-Fi in sleep */
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};
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#ifdef CONFIG_RTC_DRIVER
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#ifdef CONFIG_RTC_ALARM
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struct alm_cbinfo_s
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{
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@ -248,8 +244,6 @@ struct esp32_rtc_backup_s
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int64_t reserved0;
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};
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#endif
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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@ -268,7 +262,7 @@ static void esp32_rtc_clk_32k_enable(int ac, int res, int bias);
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static void IRAM_ATTR esp32_rtc_clk_8m_enable(bool clk_8m_en, bool d256_en);
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static uint32_t IRAM_ATTR esp32_rtc_clk_slow_freq_get_hz(void);
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#ifdef CONFIG_RTC_DRIVER
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#ifdef CONFIG_RTC_ALARM
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static void IRAM_ATTR esp32_rt_cb_handler(void *arg);
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#endif
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@ -286,8 +280,6 @@ static struct esp32_rtc_priv_s esp32_rtc_priv =
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.rtc_dboost_fpd = 1
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};
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#ifdef CONFIG_RTC_DRIVER
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/* Callback to use when the alarm expires */
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#ifdef CONFIG_RTC_ALARM
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@ -301,15 +293,11 @@ static RTC_DATA_ATTR struct esp32_rtc_backup_s rtc_saved_data;
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static struct esp32_rtc_backup_s *g_rtc_save;
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static bool g_rt_timer_enabled = false;
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef CONFIG_RTC_DRIVER
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volatile bool g_rtc_enabled = false;
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#endif
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/****************************************************************************
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* Private Functions
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@ -747,7 +735,7 @@ static void esp32_select_rtc_slow_clk(enum esp32_slow_clk_sel_e slow_clk)
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putreg32((uint32_t)cal_val, RTC_SLOW_CLK_CAL_REG);
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}
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#ifdef CONFIG_RTC_DRIVER
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#ifdef CONFIG_RTC_ALARM
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/****************************************************************************
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* Name: esp32_rt_cb_handler
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@ -788,7 +776,7 @@ static void IRAM_ATTR esp32_rt_cb_handler(void *arg)
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}
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}
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#endif /* CONFIG_RTC_DRIVER */
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#endif /* CONFIG_RTC_ALARM */
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/****************************************************************************
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* Public Functions
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@ -1884,8 +1872,6 @@ uint64_t IRAM_ATTR esp32_rtc_get_boot_time(void)
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+ (((uint64_t)getreg32(RTC_BOOT_TIME_HIGH_REG)) << 32);
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}
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#ifdef CONFIG_RTC_DRIVER
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/****************************************************************************
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* Name: up_rtc_time
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*
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@ -2271,5 +2257,3 @@ int up_rtc_timer_init(void)
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return OK;
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}
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#endif /* CONFIG_RTC_DRIVER */
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