QUERY · ISSUE

ESP32 execute esp.read_flash() cause exception

openby walklinewangopened 2020-10-16updated 2024-09-13

docsport-esp32

firmware version: MicroPython v1.13-106-g893f75546-dirty on 2020-10-16

customize partition table:

name	type	sub-type	offset	size
nvs	data	nvs	0x9000	0x6000
phy_init	data	phy	0xf000	0x1000
factory	app	factory	0x10000	0x180000
vfs	data	fat	0x200000	0x1ff000
user_data	data	fat	0x3ff000	0x1000

executed code:

>>> import esp32
>>> part=esp32.Partition
>>> part.find(type=part.TYPE_DATA)
[<Partition type=1, subtype=2, address=36864, size=24576, label=nvs, encrypted=0>, <Partition type=1, subtype=1, address=61440, size=4096, label=phy_init, encrypted=0>, <Partition type=1, subtype=129, address=2097152, size=2093056, label=vfs, encrypted=0>, <Partition type=1, subtype=129, address=4190208, size=4096, label=user_data, encrypted=0>]
>>> user=part("user_data")
>>> user.info()
(1, 129, 4190208, 4096, 'user_data', False)
>>>
>>>
>> import esp
>>> esp.flash_size()
4194304
>>> esp.flash_write(0x3ff000, b'walkline')
>>> esp.flash_read(0x3ff000, 0x10)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: object with buffer protocol required
>>>

According to the doc, the 2nd param is a length of buffer that I want to read, but why it raise a TypeError to me?

BTW, are there anyone knows how to use esp32.Partition to read and write blocks?

Thanks~

CANDIDATE · ISSUE

ESP32S3N16R8：Missing flash ORIGINALLY 16M , ACTUALLY 8M

closedby AZhi-hubopened 2025-07-11updated 2025-07-13

bug

Port, board and/or hardware

esp32s3N16R8 port

MicroPython version

MicroPython v1.25.0 on 2025-04-15; Generic ESP32S3 module with Octal-SPIRAM with ESP32S3

Reproduction

In according to official guidance , open powershell echo：
esptool --baud 460800 write_flash 0 .\ESP32_GENERIC_S3-SPIRAM_OCT-20250415-v1.25.0.bin
click RST button，and open thonny，execute

import esp
import gc
print(esp.flash_size())
print(esp.flash_user_start())
print(gc.mem_free())

you will find a problem like result below.

First line is flash size ,equals 8M，corresponds to rom
Second Line is user partition start，I know，ESP32_GENERIC_S3-SPIRAM_OCT-20250415-v1.25.0.bin is 1.5M , from 2M maybe reasonable.
Third Line is mem_free, corresponds to ram .

8388608
2097152
8320080

Actually my board is N16R8, means 16M psrom and 8M psram. after using Micropython bin, I got 8M rom , and 8M ram ,where is 8M left from flash?
I chose OCT version bin due to 8M psram, but normal and OCT version both miss flash size. I don't know why and how i need to do or it's something being limited.
And thonny is also 6m，maybe 8M-2M?

Expected behaviour

get missed 8m flash size for using

Observed behaviour

like above.

Additional Information

No, I've provided everything above.

Code of Conduct

Yes, I agree