esptool.py下载工具默认压缩APP，但代码上找不到解压的地方
Posted: Wed Feb 14, 2024 7:30 am
在IDF下烧录APP，默认会压缩APP，然后烧录压缩后的数据。烧录脚本esptool.py采用python zlib库函数进行压缩。我查看了bootloader代码，并未发现zlib解压的过程，代码只是设置了IROM MMU映射了，然后就直接读取FLASH的内容，但实际运行又能正常，所以我感到很疑惑，运行时分区镜像的zlib解压过程是在哪里？
Changing baud rate to 460800
Changed.
Configuring flash size...
Flash will be erased from 0x00010000 to 0x0003efff...
Compressed 191520 bytes to 99726...
Writing at 0x00010000... (14 %)
Writing at 0x0001b380... (28 %)
Writing at 0x000217fd... (42 %)
Writing at 0x00028da6... (57 %)
Writing at 0x0002fe44... (71 %)
Writing at 0x00036db2... (85 %)
Writing at 0x0003e1a7... (100 %)
Wrote 191520 bytes (99726 compressed) at 0x00010000 in 2.8 seconds (effective 539.8 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting via RTS pin...
Changing baud rate to 460800
Changed.
Configuring flash size...
Flash will be erased from 0x00010000 to 0x0003efff...
Compressed 191520 bytes to 99726...
Writing at 0x00010000... (14 %)
Writing at 0x0001b380... (28 %)
Writing at 0x000217fd... (42 %)
Writing at 0x00028da6... (57 %)
Writing at 0x0002fe44... (71 %)
Writing at 0x00036db2... (85 %)
Writing at 0x0003e1a7... (100 %)
Wrote 191520 bytes (99726 compressed) at 0x00010000 in 2.8 seconds (effective 539.8 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting via RTS pin...