Hi,
I am trying to enable CFD feature in ATMEGA328pb but its showing mismatch error
And if I am writing any value with 3 bit 0 then its getting written without any issue. (example 0xF4).
How can I solve this issue please help me.
Hi,
I am trying to enable CFD feature in ATMEGA328pb but its showing mismatch error
And if I am writing any value with 3 bit 0 then its getting written without any issue. (example 0xF4).
How can I solve this issue please help me.
IIRC, there's an AVRDUDE issue with linuxgpio; linuxspi is an alternative.
Verification Error when programming from Raspberry Pi (avrdude with linuxgpio bitbang) | AVR Freaks
https://www.avrfreaks.net/forum/programming-atmega4809-updi-r-pi#comment-2772466
Is there any way from that I can write Extended fuse bit 0xFC with linuxgpio avrdude?
Hi everyone,
I am using ATMEGA328PB and compiler is Atmel Studio 7.
I want to write 1 on CFD bit of Extended fuse bit through my application code.
Is that possible? If yes how can I write that.
Please help
Thanks.
You can only program fuses with ISP or HVPP i.e. external programmer.
It is not possible from an application.
You can only program fuses with ISP or HVPP i.e. external programmer. It is not possible from an application.
Ok thanks for your reply.
Actually I am trying to write fuse bits from avrdude linuxgpio from raspberry pi. Every thing is working fine but whenever I am trying to write 1 on CFD bit then it is showing miss match error.
How can I resolve this issue?
I am trying to write 1 on CFD bit then it is showing miss match error.
Note that I have now merged your two threads together here. So the "reading order" above many be confused.
Please do not start multiple threads about the same thing in future as it causes all kinds of issues trying to merge threads and so on.
My 328PB datasheet circa 2015 did not specify the CFD fuse.
The 2017 datasheet does document the CFD fuse
My Arduino v1.8.9 avrdude.conf does not accept writing to bit#3 of EFUSE.
I have no idea what avrdude.conf you might be using.
It is simple enough to see the "m328" section e.g.
memory "efuse" size = 1; min_write_delay = 4500; max_write_delay = 4500; read = "0 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0", "x x x x x x x x o o o o o o o o"; write = "1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 0", "x x x x x x x x x x x x x i i i"; ;
If you want to use avrdude to program CFD, you need to enable bit #3 for write
This might cause problems with "other" devices that use "m328 parent" e.g. that do not use bit#3
So you should really create a custom "parent"
The real mystery is WHY.
Surely it is unwise to disable the CFD mechanism via the fuse. i.e. CFD=0
The factory default is to enable CFD i.e. CFD=1
It seems an inappropriate name. CFD implies Clock Failure Detect.
A fuse called CFD implies Clock Failure Disable
CFDDISABLE would be better
David.
I have no idea what avrdude.conf you might be using.
http://svn.savannah.gnu.org/viewvc/avrdude?view=revision&revision=1397
From your link:
write = "1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 0", "x x x x x x x x x x x x x i i i";
So bit#3 has never been made "write"
I can only assume that someone had made bit#3 = 0 by mistake.
And the OP wants to restore it to the Factory default. i.e. bit#3 = 1
Personally, I would just use atprogram.exe or AS7.0 to restore the EFUSE
And leave avrdude.conf as it is.
David.
concur
[avrdude-dev] config for atmega328pb
IIRC, Ron is with AVR Freaks :
[avrdude-dev] [patch #9811] ATmega328pb has efuse bit 3
avrdude-dev has threads on linuxgpio and linuxspi.
write = "1 0 1 0 1 1 0 0 1 0 1 0 0 1 0 0", "x x x x x x x x x x x x x i i i";
Thanks this solved the issue
What I did for avrdude with 328pb
https://github.com/epccs/RPUpi/blob/master/lib/avrdude/328pb.conf
it is added to the avrdude command like in this Makefile