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| timschu | Posted: 24 Jul 2022, 10:07 AM |
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 Member Posts: 2 Joined: 23-July 22 |
FYI. You can read/erase/write the JDY-31 BK3231S flash with a CH341A programmer.  Last edit by timschu at 24 Jul 2022, 10:07 AM ------------- |
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| timschu | Posted: 24 Jul 2022, 05:07 PM |
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Member Posts: 2 Joined: 23-July 22 |
BK3231 erase chip W 31 02 A5 W 31 03 C3 W 25 wait 100 ms W 31 02 00 W 31 03 00 erase sector W 31 02 A5 W 31 03 C3 W 24 aa aa wait 50 ms W 31 02 00 W 31 03 00 read 4 bytes W 22 aa aa R dd dd dd dd program 4 bytes W 31 02 A5 W 31 03 C3 W 21 aa aa dd dd dd dd W 31 02 00 W 31 03 00 "aa aa" is address / 4, high byte first "dd dd dd dd" is 4 bytes of data 1 sector is 0x1000 bytes, sector containing specified address will be erased JDY-30 BK3231 firmware is read-protected, returns FF FF FF FF ... :( MSB of programmed bytes 0, 4, 8, 12, 16, 20, 24, ... flip ~50% of the time, not sure why. Maybe BK3231 is not 100% compatible with my CH341A programmer. ------------- |
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| iscle | Posted: 12 Sep 2022, 10:09 PM |
 Member Posts: 6 Joined: 23-January 21 |
That's interesting! I had completely forgot about this thread/device but being able to talk to it with a CH341 is awesome! I'll play with it if I have some time in the future :D ------------- |
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| shenron | Posted: 26 Oct 2022, 04:10 PM |
 Member Posts: 1 Joined: 26-October 22 |
Hi, i bought a JDY-31 SPP-C. The chip on the PCB is a BK3431S. Do you think i could update the firmware to RN42 ? Can it be done with a Arduino Mega 2560 R3 or a Arduino Leonardo ? Do you know a good tutorial to perform the task ?   Last edit by shenron at 26 Oct 2022, 04:10 PM ------------- |
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