djsundog
/
circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

esp8266/makeimg.py: Print out info about RAM segments when building fw.

This commit is contained in:
Damien George 2020-04-04 16:30:39 +11:00
parent e0905e85a7
commit 497ca99eb2
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
ports/esp8266/makeimg.py
View File

@ -2,6 +2,11 @@ import sys
import struct import struct
import hashlib import hashlib
# This region at the start of flash contains a small header and then segments
# containing .text, .data and .rodata, and so must be large enough to hold all
# of this. This data is loaded to the appropriate places in RAM by the ROM
# bootloader at boot. After this in flash comes .irom0.text, which must begin
# on a flash erase-page boundary.
SEGS_MAX_SIZE = 0x9000 SEGS_MAX_SIZE = 0x9000
assert len(sys.argv) == 4 assert len(sys.argv) == 4
@ -18,6 +23,15 @@ with open(sys.argv[3], "wb") as fout:
md5.update(data_flash[4:]) md5.update(data_flash[4:])
print("flash ", len(data_flash)) print("flash ", len(data_flash))
# Print info about segments in this first part of flash
num_segs = struct.unpack_from("<BBBBI", data_flash, 0)[1]
offset = 8
for seg_num in range(num_segs):
seg_name = [".text", ".data", ".rodata"][seg_num]
seg_offset, seg_size = struct.unpack_from("<II", data_flash, offset)
print(" {:7} {} at 0x{:x}".format(seg_name, seg_size, seg_offset))
offset += 8 + seg_size
with open(sys.argv[2], "rb") as f: with open(sys.argv[2], "rb") as f:
data_rom = f.read() data_rom = f.read()