esptool.py v3.3.1
Serial port /dev/cu.usbserial-14110
Connecting....
Detecting chip type... ESP32-C2
Chip is ESP32-C2 (revision 1)
Features: Wi-Fi
Crystal is 40MHz
MAC: 10:97:bd:f1:e6:3c
Uploading stub...
Running stub...
Stub running...
Manufacturer: 5e
Device: 4016
Detected flash size: 4MB
Hard resetting via RTS pin...
More Information
esptool.py works well, actually. But after reviewing the code, I found something inconsistent.
According to esp_efuse_table.csv#L69 in ESP-IDF, the position of PKG_VERSION is at bit 54 of EFUSE_BLK2 (which is also EFUSE_RD_BLK2_DATA0_REG).
As we learn from efuse_reg.h#L312, the value of EFUSE_RD_BLK2_DATA0_REG is DR_REG_EFUSE_BASE + 0x40 and EFUSE_RD_BLK2_DATA1_REG is DR_REG_EFUSE_BASE + 0x44. So we can infer that the bit position of PKG_VERSION counting from 0x044 should be 22.
While in esp32c2.py#L55, we read the forth word (EFUSE_BASE + 0x044 plus 12 bytes) and right shifted 21 bits (considering the byte order, means moving the pointer right 21 bits). This is actually 12 bytes + 21 bits = 117 bits counting from 0x044, or bit 149 counting from EFUSE_BLK2.
dobairoland
commented
2 years ago
Operating System
macOS 12.4
Esptool Version
v4.1-15-g65f8614
Python Version
Python 3.9.13
Chip Description
ESP32-C2
Device Description
ESP8684-DevKitM-1
Hardware Configuration
No response
How is Esptool Run
Terminal (iTerm.app)
Full Esptool Command Line that Was Run
esptool.py --port /dev/cu.usbserial-14110 flash_id
Esptool Output
More Information
esptool.pyworks well, actually. But after reviewing the code, I found something inconsistent.According to esp_efuse_table.csv#L69 in ESP-IDF, the position of
PKG_VERSIONis at bit54ofEFUSE_BLK2(which is alsoEFUSE_RD_BLK2_DATA0_REG).As we learn from efuse_reg.h#L312, the value of
EFUSE_RD_BLK2_DATA0_REGisDR_REG_EFUSE_BASE + 0x40andEFUSE_RD_BLK2_DATA1_REGisDR_REG_EFUSE_BASE + 0x44. So we can infer that the bit position ofPKG_VERSIONcounting from0x044should be22.While in esp32c2.py#L55, we read the forth word (
EFUSE_BASE + 0x044plus 12 bytes) and right shifted 21 bits (considering the byte order, means moving the pointer right 21 bits). This is actually12 bytes + 21 bits = 117 bitscounting from0x044, or bit149counting fromEFUSE_BLK2.https://github.com/espressif/esptool/blob/65f861420515217f7b5d209fce288808dc5b1943/esptool/targets/esp32c2.py#L52-L55
Other Steps to Reproduce
No response
I Have Read the Troubleshooting Guide