alex/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2025-08-08 12:10:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

esp32s2beta: Using rtc_wdt API

Browse Source
This commit is contained in:
KonstantinKondrashov
2019-08-14 22:54:07 +08:00
parent d3637cd06b
commit 2644ddc3e1
3 changed files with 38 additions and 60 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
components/esp32s2beta/sleep_modes.c
View File

@@ -34,6 +34,7 @@
#include "soc/spi_mem_reg.h"
#include "soc/sens_reg.h"
#include "soc/dport_reg.h"
#include "soc/rtc_wdt.h"
#include "driver/rtc_io.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
@@ -218,27 +219,6 @@ void IRAM_ATTR esp_deep_sleep_start(void)
}
}
static void rtc_wdt_enable(int time_ms)
{
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, RTC_CNTL_WDT_WKEY_VALUE);
WRITE_PERI_REG(RTC_CNTL_WDTFEED_REG, 1);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_SYS_RESET_LENGTH, 7);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_CPU_RESET_LENGTH, 7);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG0, RTC_WDT_STG_SEL_RESET_RTC);
WRITE_PERI_REG(RTC_CNTL_WDTCONFIG1_REG, rtc_clk_slow_freq_get_hz() * time_ms / 1000);
SET_PERI_REG_MASK(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN | RTC_CNTL_WDT_PAUSE_IN_SLP);
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, 0);
}
static void rtc_wdt_disable(void)
{
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, RTC_CNTL_WDT_WKEY_VALUE);
WRITE_PERI_REG(RTC_CNTL_WDTFEED_REG, 1);
REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG0, RTC_WDT_STG_SEL_OFF);
REG_CLR_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN);
WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, 0);
}
/**
* Helper function which handles entry to and exit from light sleep
* Placed into IRAM as flash may need some time to be powered on.
@@ -305,7 +285,17 @@ esp_err_t esp_light_sleep_start(void)
rtc_vddsdio_config_t vddsdio_config = rtc_vddsdio_get_config();
// Safety net: enable WDT in case exit from light sleep fails
rtc_wdt_enable(1000);
bool wdt_was_enabled = rtc_wdt_is_on(); // If WDT was enabled in the user code, then do not change it here.
if (!wdt_was_enabled) {
rtc_wdt_protect_off();
rtc_wdt_disable();
rtc_wdt_set_length_of_reset_signal(RTC_WDT_SYS_RESET_SIG, RTC_WDT_LENGTH_3_2us);
rtc_wdt_set_length_of_reset_signal(RTC_WDT_CPU_RESET_SIG, RTC_WDT_LENGTH_3_2us);
rtc_wdt_set_stage(RTC_WDT_STAGE0, RTC_WDT_STAGE_ACTION_RESET_RTC);
rtc_wdt_set_time(RTC_WDT_STAGE0, 1000);
rtc_wdt_enable();
rtc_wdt_protect_on();
}
// Enter sleep, then wait for flash to be ready on wakeup
esp_err_t err = esp_light_sleep_inner(pd_flags,
@@ -331,7 +321,9 @@ esp_err_t esp_light_sleep_start(void)
esp_timer_impl_unlock();
DPORT_STALL_OTHER_CPU_END();
rtc_wdt_disable();
if (!wdt_was_enabled) {
rtc_wdt_disable();
}
portEXIT_CRITICAL(&light_sleep_lock);
return err;
}