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bootloader_support: Fix enable rtc_wdt for resolve issue with varying supply

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Eliminates the issue with the lock up in the bootloader due to a power drawdown during its operation.

Closes https://github.com/espressif/esp-idf/issues/1814
This commit is contained in:
Konstantin Kondrashov
2018-07-26 17:07:36 +08:00
committed by bot
parent 5f1844a0c8
commit 9c715d7946
8 changed files with 110 additions and 3 deletions
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13
components/bootloader_support/src/bootloader_init.c
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@@ -143,8 +143,21 @@ static esp_err_t bootloader_main()
ESP_LOGI(TAG, "compile time " __TIME__ );
ets_set_appcpu_boot_addr(0);
#ifdef CONFIG_BOOTLOADER_WDT_ENABLE
ESP_LOGD(TAG, "Enabling RTCWDT(%d ms)", CONFIG_BOOTLOADER_WDT_TIME_MS);
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, CONFIG_BOOTLOADER_WDT_TIME_MS);
rtc_wdt_enable();
rtc_wdt_protect_on();
#else
/* disable watch dog here */
rtc_wdt_disable();
#endif
REG_SET_FIELD(TIMG_WDTWPROTECT_REG(0), TIMG_WDT_WKEY, TIMG_WDT_WKEY_VALUE);
REG_CLR_BIT( TIMG_WDTCONFIG0_REG(0), TIMG_WDT_FLASHBOOT_MOD_EN );
#ifndef CONFIG_SPI_FLASH_ROM_DRIVER_PATCH