alex/esp-idf
alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Merge branch 'bugfix/external_rtc_start_fail' into 'master'

Browse Source 
soc/rtc: bypass touchpad8 and touchpad9 current to external 32k crystal oscillator

See merge request idf/esp-idf!2441
This commit is contained in:
Angus Gratton 2019-02-14 10:40:48 +08:00
commit 23a03cf6ad
4 changed files with 61 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
components/esp32/Kconfig
View File

@ -802,6 +802,19 @@ menu "ESP32-specific"
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

2
components/esp32/include/esp_sleep.h
View File

@ -95,6 +95,7 @@ esp_err_t esp_sleep_disable_wakeup_source(esp_sleep_source_t source);
* 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();
@ -121,6 +122,7 @@ esp_err_t esp_sleep_enable_timer_wakeup(uint64_t time_in_us);
*
* @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();

13
components/esp32/sleep_modes.c
View File

@ -403,6 +403,9 @@ esp_err_t esp_sleep_disable_wakeup_source(esp_sleep_source_t source)
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");
@ -436,6 +439,9 @@ static void timer_wakeup_prepare()
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;
@ -695,6 +701,13 @@ static uint32_t get_power_down_flags()
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;
}

39
components/soc/esp32/rtc_clk.c
View File

@ -58,7 +58,7 @@
#define APLL_CAL_DELAY_2 0x3f
#define APLL_CAL_DELAY_3 0x1f
#define XTAL_32K_DAC_VAL 1
#define XTAL_32K_DAC_VAL 3
#define XTAL_32K_DRES_VAL 3
#define XTAL_32K_DBIAS_VAL 0
@ -114,14 +114,36 @@ static const char* TAG = "rtc_clk";
static void rtc_clk_32k_enable_common(int dac, int dres, int dbias)
{
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32N_MUX_SEL | RTC_IO_X32P_MUX_SEL);
CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG,
RTC_IO_X32P_RDE | RTC_IO_X32P_RUE | RTC_IO_X32N_RUE |
RTC_IO_X32N_RDE | RTC_IO_X32N_MUX_SEL | RTC_IO_X32P_MUX_SEL);
RTC_IO_X32P_RDE | RTC_IO_X32P_RUE | RTC_IO_X32N_RUE |
RTC_IO_X32N_RDE | RTC_IO_X32N_MUX_SEL | RTC_IO_X32P_MUX_SEL);
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_X32N_MUX_SEL | RTC_IO_X32P_MUX_SEL);
/* Set the parameters of xtal
dac --> current
dres --> resistance
dbias --> bais voltage
*/
REG_SET_FIELD(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_DAC_XTAL_32K, dac);
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);
SET_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K);
#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
NOTE: TOUCH8 and TOUCH9 register settings are reversed except for DAC, so we set RTC_IO_TOUCH_PAD9_REG here instead
*/
SET_PERI_REG_MASK(RTC_IO_TOUCH_PAD9_REG, RTC_IO_TOUCH_PAD9_TIE_OPT_M);
/* Set the current used to compensate TOUCH PAD8 */
SET_PERI_REG_BITS(RTC_IO_TOUCH_PAD8_REG, RTC_IO_TOUCH_PAD8_DAC, 4, RTC_IO_TOUCH_PAD8_DAC_S);
/* Power up TOUCH8
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);
}
void rtc_clk_32k_enable(bool enable)
@ -129,7 +151,12 @@ void rtc_clk_32k_enable(bool enable)
if (enable) {
rtc_clk_32k_enable_common(XTAL_32K_DAC_VAL, XTAL_32K_DRES_VAL, XTAL_32K_DBIAS_VAL);
} else {
CLEAR_PERI_REG_MASK(RTC_IO_XTAL_32K_PAD_REG, RTC_IO_XPD_XTAL_32K);
/* Disable X32N and X32P pad drive external xtal */
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
}
}