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esp8266: Minimize gap between Inst/DataRAM segments and FlashROM segment. 

With .rodata being in FlashROM now, gap can be much smaller now. InstRAM
can be max 32K, and with segment headers, that already makes it more than
32K. Then there's some .data still, and the next Flash page boundary is
0x9000. That figure should be more or less future-proof.

TODO: Refactor makeimg to take FlashROM segment offset from file name.
This commit is contained in:
Paul Sokolovsky 2016-04-03 15:40:53 +03:00
parent 9698a60591
commit 8d2bcaf3cd
3 changed files with 7 additions and 5 deletions
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4
esp8266/Makefile
View File

@ -150,7 +150,7 @@ $(BUILD)/frozen.c: $(wildcard $(SCRIPTDIR)/*) $(CONFVARS_FILE)
deploy: $(BUILD)/firmware-combined.bin
$(ECHO) "Writing $< to the board"
#$(Q)esptool.py --port $(PORT) write_flash 0 $<
$(Q)esptool.py --port $(PORT) --baud $(BAUD) write_flash --flash_size=8m 0 $(BUILD)/firmware.elf-0x00000.bin 0x10000 $(BUILD)/firmware.elf-0x10000.bin
$(Q)esptool.py --port $(PORT) --baud $(BAUD) write_flash --flash_size=8m 0 $(BUILD)/firmware.elf-0x00000.bin 0x9000 $(BUILD)/firmware.elf-0x0[1-f]000.bin
reset:
echo -e "\r\nimport pyb; pyb.hard_reset()\r\n" >$(PORT)
@ -158,7 +158,7 @@ reset:
$(BUILD)/firmware-combined.bin: $(BUILD)/firmware.elf
$(ECHO) "Create $@"
$(Q)esptool.py elf2image $^
$(Q)$(PYTHON) makeimg.py $(BUILD)/firmware.elf-0x00000.bin $(BUILD)/firmware.elf-0x10000.bin $@
$(Q)$(PYTHON) makeimg.py $(BUILD)/firmware.elf-0x00000.bin $(BUILD)/firmware.elf-0x0[1-f]000.bin $@
$(BUILD)/firmware.elf: $(OBJ)
$(ECHO) "LINK $@"

2
esp8266/esp8266.ld
View File

@ -5,7 +5,7 @@ MEMORY
dport0_0_seg : org = 0x3ff00000, len = 0x10
dram0_0_seg : org = 0x3ffe8000, len = 0x14000
iram1_0_seg : org = 0x40100000, len = 0x8000
irom0_0_seg : org = 0x40210000, len = 0x80000
irom0_0_seg : org = 0x40209000, len = 0x80000
}
/* define the top of RAM */

6
esp8266/makeimg.py
View File

@ -1,5 +1,7 @@
import sys
SEGS_MAX_SIZE = 0x9000
assert len(sys.argv) == 4
with open(sys.argv[3], 'wb') as fout:
@ -9,7 +11,7 @@ with open(sys.argv[3], 'wb') as fout:
fout.write(data_flash)
print('flash ', len(data_flash))
pad = b'\xff' * (0x10000 - len(data_flash))
pad = b'\xff' * (SEGS_MAX_SIZE - len(data_flash))
fout.write(pad)
print('padding ', len(pad))
@ -18,4 +20,4 @@ with open(sys.argv[3], 'wb') as fout:
fout.write(data_rom)
print('irom0text', len(data_rom))
print('total ', 0x10000 + len(data_rom))
print('total ', SEGS_MAX_SIZE + len(data_rom))