bool "Internal 8.5MHz oscillator, divided by 256 (~33kHz)"
endchoice
+ config ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+ bool "Additional current for external 32kHz crystal"
+ depends on ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL
+ default "n"
+ help
+ Choose which additional current is used for rtc external crystal.
+
+ - "Enable current by touch" option provides touch pad9 current to
+ external 32kHz crystal, at the expense of slightly higher (4-5uA) deep
+ sleep current consumption. Note that enabled Touch or ULP wakeup
+ source at sleep, this item is invalid even selected ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT.
+
+
config ESP32_RTC_CLK_CAL_CYCLES
int "Number of cycles for RTC_SLOW_CLK calibration"
default 3000 if ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL
* source is used.
* @return
* - ESP_OK on success
+ * - ESP_ERR_NOT_SUPPORTED if additional current by touch (CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT) is enabled.
* - ESP_ERR_INVALID_STATE if ULP co-processor is not enabled or if wakeup triggers conflict
*/
esp_err_t esp_sleep_enable_ulp_wakeup();
*
* @return
* - ESP_OK on success
+ * - ESP_ERR_NOT_SUPPORTED if additional current by touch (CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT) is enabled.
* - ESP_ERR_INVALID_STATE if wakeup triggers conflict
*/
esp_err_t esp_sleep_enable_touchpad_wakeup();
esp_err_t esp_sleep_enable_ulp_wakeup()
{
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+ return ESP_ERR_NOT_SUPPORTED;
+#endif
#ifdef CONFIG_ULP_COPROC_ENABLED
if(s_config.wakeup_triggers & RTC_EXT0_TRIG_EN) {
ESP_LOGE(TAG, "Conflicting wake-up trigger: ext0");
esp_err_t esp_sleep_enable_touchpad_wakeup()
{
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+ return ESP_ERR_NOT_SUPPORTED;
+#endif
if (s_config.wakeup_triggers & (RTC_EXT0_TRIG_EN)) {
ESP_LOGE(TAG, "Conflicting wake-up trigger: ext0");
return ESP_ERR_INVALID_STATE;
if (s_config.pd_options[ESP_PD_DOMAIN_XTAL] != ESP_PD_OPTION_ON) {
pd_flags |= RTC_SLEEP_PD_XTAL;
}
+
+ if ((s_config.wakeup_triggers & (RTC_TOUCH_TRIG_EN | RTC_ULP_TRIG_EN)) == 0) {
+ // If enabled EXT1 only and enable the additional current by touch, should be keep RTC_PERIPH power on.
+#if ((defined CONFIG_ESP32_RTC_CLOCK_SOURCE_EXTERNAL_CRYSTAL) && (defined CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT))
+ pd_flags &= ~RTC_SLEEP_PD_RTC_PERIPH;
+#endif
+ }
return pd_flags;
}
REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DRES_XTAL_32K, dres);
REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DBIAS_XTAL_32K, dbias);
- /* TOUCH sensor can provide additional current to external XTAL.
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
+ /* TOUCH sensor can provide additional current to external XTAL.
In some case, X32N and X32P PAD don't have enough drive capability to start XTAL */
SET_PERI_REG_MASK(RTC_IO_TOUCH_CFG_REG, RTC_IO_TOUCH_XPD_BIAS_M);
/* Tie PAD Touch8 to VDD
So the Touch DAC start to drive some current from VDD to TOUCH8(which is also XTAL-N)
*/
SET_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_XPD_M);
+#endif // CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
/* Power up external xtal */
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K_M);
}
rtc_clk_32k_enable_common(XTAL_32K_DAC_VAL, XTAL_32K_DRES_VAL, XTAL_32K_DBIAS_VAL);
} else {
/* Disable X32N and X32P pad drive external xtal */
- CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K);
+ CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K_M);
+#ifdef CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
/* Power down TOUCH */
CLEAR_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_XPD_M);
+#endif // CONFIG_ESP32_RTC_EXTERNAL_CRYSTAL_ADDITIONAL_CURRENT
}
}