低电压导致esp32s2陷入循环快速重启，电压恢复也不能进入正常启动模式

[achao1104]

你好，

我们用稳压源限定降低电流和电压，然后到达一定幅度后，esp32s2(idf4.3.2)会进入快速循环重启，这时候即便逐渐恢复电压和电流，也不能进入正常状态。

Build:Oct 25 2019
rst:0xf (BROWN_OUT_RST),boot:0xa (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3ffe6100,len:0x1bf4
load:0x4004c000,len:0xc7c
load:0x40050000,len:0x31ec
entry 0x4004c210
I (22) boot: ESP-IDF v4.3.2-dirty 2nd stage bootloader
I (22) boot: compile time 13:46:09
I (22) boot: chip revision: 0
I (25) qio_mode: Enabling default flash chip QIO
I (30) boot.esp32s2: SPI Speed : 80MHz
I (35) boot.esp32s2: SPI Mode : QIO
I (40) boot.esp32s2: SPI Flash Size : 4MB
I (44) boot: Enabling RNG early entropy source...
I (50) boot: Partition Table:
I (53) boot: ## Label Usage Type ST Offset Length
I (61) boot: 0 nvs WiFi data 01 02 00009000 00005000
I (68) boot: 1 otadata OTA data 01 00 0000e000 00002000
I (76) boot: 2 ota_0 OTA app 00 10 00010000 00100000
I (83) boot: 3 ota_1 OTA app 00 11 00110000 00100000
I (91) boot: 4 storage Unknown data 01 82 00210000 001e0000
I (98) boot: 5 coredump Unknown data 01 03 003f0000 00010000
I (105) boot: End of partition table
I (110) esp_image: segment 0: paddr=00010020 vaddr=3f000020 size=231d8h (143832) map
I (143) esp_image: segment 1: paddr=00033200 vaddr=3ffcddf0 size=05744h ( 22340) load
I (148) esp_image: segment 2: paddr=0003894c vaddr=40024000 size=076cch ( 30412) load
I (155) esp_image: segment 3: paddr=00040020 vaddr=40080020 size=8a710h (567056) map
I (254) esp_image: segment 4: paddr=000ca738 vaddr=4002b6cc size=1271ch ( 75548) load
I (271) esp_image: segment 5: paddr=000dce5c vaddr=40070000 size=0002ch ( 44) load
I (272) esp_image: segment 6: paddr=000dce90 vaddr=50000000 size=00020h ( 32) load
I (290) boot: Loaded app from partition at offset 0x10000
I (290) boot: Disabling RNG early entropy source...
I (302) cache: Instruction cache : size 8KB, 4Ways, cache line size 32Byte
I (302) cache: Data cache : size 8KB, 4Ways, cache line size 32Byte
I (308) spiram: Found 16MBit SPI RAM device
I (313) spiram: SPI RAM mode: sram 80m
I (317) spiram: PSRAM initialized, cache is in normal (1-core) mode.
I (324) cpu_start: Pro cpu up.
I (547) spiram: SPI SRAM memory test OK
I (554) cpu_start: Pro cpu start user code
I (554) cpu_start: cpu freq: 240000000
I (554) cpu_start: Application information:
I (557) cpu_start: Project name: solardevice
I (562) cpu_start: App version: 21
I (567) cpu_start: Compile time: Jan 18 2022 13:45:37
I (573) cpu_start: ELF file SHA256: babfb167acf19a32...
I (579) cpu_start: ESP-IDF: v4.3.2-dirty
I (584) heap_init: Initializing. RAM available for dynamic allocation:
I (591) heap_init: At 3FF9E02C len 00001FC4 (7 KiB): RTCRAM
I (598) heap_init: At 3FFD8B18 len 000234E8 (141 KiB): D/IRAM
I (604) heap_init: At 3FFF�ESP-ROM:esp32s2-rc4-20191025
Build:Oct 25 2019
rst:0xf (BROWN_OUT_RST),boot:0xa (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3ffe6100,len:0x1bf4
load:0x4004c000,len:0xc7c
load:0x40050000,len:0x31ec
entry 0x4004c210
I (22) boot: ESP-IDF v4.3.2-dirty 2nd stage bootloader
I (22) boot: compile time 13:46:09
I (22) boot: chip revision: 0
I (25) qio_mode: Enabling default flash chip QIO
I (30) boot.esp32s2: SPI Speed : 80MHz
I (35) boot.esp32s2: SPI Mode : QIO
I (40) boot.esp32s2: SPI Flash Size : 4MB
I (44) boot: Enabling RNG early entropy source...
I (50) boot: Partition Table:
I (53) boot: ## Label Usage Type ST Offset Length
I (61) boot: 0 nvs WiFi data 01 02 00009000 00005000
I (68) boot: 1 otadata OTA data 01 00 0000e000 00002000
I (76) boot: 2 ota_0 OTA app 00 10 00010000 00100000
I (83) boot: 3 ota_1 OTA app 00 11 00110000 00100000
I (91) boot: 4 storage Unknown data 01 82 00210000 001e0000
I (98) boot: 5 coredump Unknown data 01 03 003f0000 00010000
I (105) boot: End of partition table
I (110) esp_image: segment 0: paddr=00010020 vaddr=3f000020 size=231d8h (143832) map
I (143) esp_image: segment 1: paddr=00033200 vaddr=3ffcddf0 size=05744h ( 22340) load
I (148) esp_image: segment 2: paddr=0003894c vaddr=40024000 size=076cch ( 30412) load
I (155) esp_image: segment 3: paddr=00040020 vaddr=40080020 size=8a710h (567056) map
I (254) esp_image: segment 4: paddr=000ca738 vaddr=4002b6cc size=1271ch ( 75548) load
I (271) esp_image: segment 5: paddr=000dce5c vaddr=40070000 size=0002ch ( 44) load
I (272) esp_image: segment 6: paddr=000dce90 vaddr=50000000 size=00020h ( 32) load
I (290) boot: Loaded app from partition at offset 0x10000
I (290) boot: Disabling RNG early entropy source...
I (302) cache: Instruction cache : size 8KB, 4Ways, cache line size 32Byte
I (302) cache: Data cache : size 8KB, 4Ways, cache line size 32Byte
I (308) spiram: Found 16MBit SPI RAM device
I (313) spiram: SPI RAM mode: sram 80m
I (317) spiram: PSRAM initialized, cache is in normal (1-core) mode.
I (324) cpu_start: Pro cpu up.
I (547) spiram: SPI SRAM memory test OK
I (554) cpu_start: Pro cpu start user code
I (554) cpu_start: cpu freq: 240000000
I (554) cpu_start: Application information:
I (557) cpu_start: Project name: solardevice
I (562) cpu_start: App version: 21
I (567) cpu_start: Compile time: Jan 18 2022 13:45:37
I (573) cpu_start: ELF file SHA256: babfb167acf19a32...
I (579) cpu_start: ESP-IDF: v4.3.2-dirty
I (584) heap_init: Initializing. RAM available for dynamic allocation:
I (591) heap_init: At 3FF9E02C len 00001FC4 (7 KiB): RTCRAM
I (598) heap_init: At 3FFD8B18 len 000234E8 (141 KiB): D/IRAM
I (604) heap_init: At 3FFF�ESP-ROM:esp32s2-rc4-20191025
Build:Oct 25 2019
rst:0xf (BROWN_OUT_RST),boot:0xa (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3ffe6100,len:0x1bf4
load:0x4004c000,len:0xc7c
load:0x40050000,len:0x31ec
entry 0x4004c210
I (22) boot: ESP-IDF v4.3.2-dirty 2nd stage bootloader
I (22) boot: compile time 13:46:09
I (22) boot: chip revision: 0
I (25) qio_mode: Enabling default flash chip QIO
I (30) boot.esp32s2: SPI Speed : 80MHz
I (35) boot.esp32s2: SPI Mode : QIO
I (40) boot.esp32s2: SPI Flash Size : 4MB
I (44) boot: Enabling RNG early entropy source...
I (50) boot: Partition Table:
I (53) boot: ## Label Usage Type ST Offset Length
I (61) boot: 0 nvs WiFi data 01 02 00009000 00005000
I (68) boot: 1 otadata OTA data 01 00 0000e000 00002000
I (76) boot: 2 ota_0 OTA app 00 10 00010000 00100000
I (83) boot: 3 ota_1 OTA app 00 11 00110000 00100000
I (91) boot: 4 storage Unknown data 01 82 00210000 001e0000
I (98) boot: 5 coredump Unknown data 01 03 003f0000 00010000
I (105) boot: End of partition table
I (110) esp_image: segment 0: paddr=00010020 vaddr=3f000020 size=231d8h (143832) map
I (143) esp_image: segment 1: paddr=00033200 vaddr=3ffcddf0 size=05744h ( 22340) load
I (148) esp_image: segment 2: paddr=0003894c vaddr=40024000 size=076cch ( 30412) load
I (155) esp_image: segment 3: paddr=00040020 vaddr=40080020 size=8a710h (567056) map
I (254) esp_image: segment 4: paddr=000ca738 vaddr=4002b6cc size=1271ch ( 75548) load
I (271) esp_image: segment 5: paddr=000dce5c vaddr=40070000 size=0002ch ( 44) load
I (272) esp_image: segment 6: paddr=000dce90 vaddr=50000000 size=00020h ( 32) load
I (290) boot: Loaded app from partition at offset 0x10000
I (290) boot: Disabling RNG early entropy source...
I (302) cache: Instruction cache : size 8KB, 4Ways, cache line size 32Byte
I (302) cache: Data cache : size 8KB, 4Ways, cache line size 32Byte
I (308) spiram: Found 16MBit SPI RAM device
I (313) spiram: SPI RAM mode: sram 80m
I (317) spiram: PSRAM initialized, cache is in normal (1-core) mode.
I (324) cpu_start: Pro cpu up.
I (547) spiram: SPI SRAM memory test OK
I (554) cpu_start: Pro cpu start user code
I (554) cpu_start: cpu freq: 240000000
I (554) cpu_start: Application information:
I (557) cpu_start: Project name: solardevice
I (562) cpu_start: App version: 21
I (567) cpu_start: Compile time: Jan 18 2022 13:45:37
I (573) cpu_start: ELF file SHA256: babfb167acf19a32...
I (579) cpu_start: ESP-IDF: v4.3.2-dirty
I (584) heap_init: Initializing. RAM available for dynamic allocation:
I (591) heap_init: At 3FF9E02C len 00001FC4 (7 KiB): RTCRAM
I (598) heap_init: At 3FFD8B18 len 000234E8 (141 KiB): D/IRAM
I (604) heap_init: At 3FFF�ESP-ROM:esp32s2-rc4-20191025
Build:Oct 25 2019
rst:0xf (BROWN_OUT_RST),boot:0xa (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3ffe6100,len:0x1bf4
load:0x4004c000,len:0xc7c

[ESP_ICY]

如果依旧报BROWN_OUT_RST，说明电压还没有完全恢复，再观察一下