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Add a custom linker script for 4m flash

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PUBLISHED_FROM=a92b86588923fb54075b1c3ed8ca8112164c36c5
This commit is contained in:
Deomid Ryabkov 2015-11-25 11:57:00 +00:00 committed by rojer
parent 5b36f32996
commit d2b9ad570f
2 changed files with 31 additions and 1 deletions
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12
examples/ESP8266_RTOS/README.md
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@ -23,4 +23,14 @@ $ esptool.py --port /dev/ttyUSB0 --baud 230400 \
0x01000 ${BIN_PATH}/upgrade/user1.4096.new.6.bin
```
Note: the output can be made to fit in 512KB (4Mb) by moving `irom0_0_seg` in [eagle.app.v6.ld](https://github.com/espressif/ESP8266_RTOS_SDK/blob/master/ld/eagle.app.v6.ld) and increasing its size.
The output can be made to fit in 512KB (4Mb), but stock linker scripts do not reserve enough space for code.
Custom linker script is provided for that, so you can use it for smaller devices like so (example that will work with ESP-01):
```
$ make clean; make BOOT=none APP=0 SPI_SPEED=40 SPI_MODE=qio SPI_SIZE_MAP=0 LD_FILE=ld/eagle.app.v6.512.compact.ld
$ esptool.py --port /dev/ttyUSB0 --baud 230400 \
write_flash --flash_mode=qio --flash_size=4m \
0x00000 ${BIN_PATH}/eagle.flash.bin \
0x10000 ${BIN_PATH}/eagle.irom0text.bin
```

20
examples/ESP8266_RTOS/ld/eagle.app.v6.512.compact.ld Normal file
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@ -0,0 +1,20 @@
/* eagle.flash.bin @ 0x00000 */
/* eagle.irom0text.bin @ 0x10000 */
/*
* Flash map for 512KB flash.
*
* There is 0x2000 (16KB) available between 0x8000 and 0x10000.
*
* Note: IROM images starts at 0x10000 (ignore Makefile output which says 0x40000.
*/
MEMORY
{
dport0_0_seg : org = 0x3FF00000, len = 0x10
dram0_0_seg : org = 0x3FFE8000, len = 0x18000
iram1_0_seg : org = 0x40100000, len = 0x8000
irom0_0_seg : org = 0x40210000, len = 0x6C000
}
INCLUDE "../ld/eagle.app.v6.common.ld"