Comments (23)
botletics
commented on July 24, 2024
Update: I upgraded to IDE 1.8.2 and can now successfully upload the bootloader as well as code with the Arduino as ISP and with the "Upload Using Programmer" option in the IDE. However, I have to select 1MHz Internal for the 328PB even though I have a 16MHz resonator, because all other clock settings have the wrong timing (for example, 1s delay would be more like 15s or something). Any ideas why the timing isn't correct?
Also, I would still love to be able to upload code via an FTDI so that I can use the serial monitor without disconnecting the Arduino Uno then plugging in the FTDI each time I change the code. Right now, even with the bootloader successfully flashed I cannot upload code with FTDI.
from atmega328pb-testing.
awatterott
commented on July 24, 2024
I think you have not set the fuse bits and so the AVR runs with the default settings: internal 8MHz RC oscillator with 1/8 prescaler. With 1MHz clock the bootloader will also not work, because the default UART speed (115200) is too high. The internal clock is also not very accurate.
Try to flash the bootloader directly with AVRdude. Here are the settings:
https://github.com/watterott/wattuino/tree/master/software/Optiboot#fuse-settings-for-atmega328
from atmega328pb-testing.
botletics
commented on July 24, 2024
It seems like the default speed is actually 1MHz because all the other options yield the wrong timing. I can successfully burn the bootloader with the IDE at 16MHz but it seems as if it is still running at 1MHz because a 1s delay becomes 16s, so somehow it's not setting the fuses properly I guess? I also can't upload code with the FTDI after the bootloader is flashed.
Also, the page you referred to only shows the avrdude configuration for the 328P, not the 328PB. When I simply change 328p to 328pb, it says "AVR Part atmega328pb not found"
from atmega328pb-testing.
awatterott
commented on July 24, 2024
The fuse settings of m328, m328p and m328pb are the same and you have to use the right avrdude.conf.
Please try it with the Arduino IDE and enable the verbose output on upload and send the log messages, when burning the bootloader.
from atmega328pb-testing.
botletics
commented on July 24, 2024
Here is what I chose:
Here is the verbose output:
`C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude.exe -CC:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf -v -patmega328pb -cstk500v1 -PCOM7 -b19200 -e -Ulock:w:0xFF:m -Uefuse:w:0xFD:m -Uhfuse:w:0xDE:m -Ulfuse:w:0xE2:m
avrdude.exe: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf"
Using Port : COM7
Using Programmer : stk500v1
Overriding Baud Rate : 19200
AVR Part : ATmega328PB
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : STK500
Description : Atmel STK500 Version 1.x firmware
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us
avrdude.exe: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude.exe: Device signature = 0x1e9516 (probably m328pb)
avrdude.exe: erasing chip
avrdude.exe: reading input file "0xFF"
avrdude.exe: writing lock (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude.exe: 1 bytes of lock written
avrdude.exe: verifying lock memory against 0xFF:
avrdude.exe: load data lock data from input file 0xFF:
avrdude.exe: input file 0xFF contains 1 bytes
avrdude.exe: reading on-chip lock data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of lock verified
avrdude.exe: reading input file "0xFD"
avrdude.exe: writing efuse (1 bytes):
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude.exe -CC:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf -v -patmega328pb -cstk500v1 -PCOM7 -b19200 -Uflash:w:C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex:i -Ulock:w:0xCF:m
Writing | ***failed;
################################################## | 100% 0.06s
avrdude.exe: 1 bytes of efuse written
avrdude.exe: verifying efuse memory against 0xFD:
avrdude.exe: load data efuse data from input file 0xFD:
avrdude.exe: input file 0xFD contains 1 bytes
avrdude.exe: reading on-chip efuse data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: WARNING: invalid value for unused bits in fuse "efuse", should be set to 1 according to datasheet
This behaviour is deprecated and will result in an error in future version
You probably want to use 0xf5 instead of 0xfd (double check with your datasheet first).
avrdude.exe: 1 bytes of efuse verified
avrdude.exe: reading input file "0xDE"
avrdude.exe: writing hfuse (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude.exe: 1 bytes of hfuse written
avrdude.exe: verifying hfuse memory against 0xDE:
avrdude.exe: load data hfuse data from input file 0xDE:
avrdude.exe: input file 0xDE contains 1 bytes
avrdude.exe: reading on-chip hfuse data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of hfuse verified
avrdude.exe: reading input file "0xE2"
avrdude.exe: writing lfuse (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude.exe: 1 bytes of lfuse written
avrdude.exe: verifying lfuse memory against 0xE2:
avrdude.exe: load data lfuse data from input file 0xE2:
avrdude.exe: input file 0xE2 contains 1 bytes
avrdude.exe: reading on-chip lfuse data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of lfuse verified
avrdude.exe done. Thank you.
avrdude.exe: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf"
Using Port : COM7
Using Programmer : stk500v1
Overriding Baud Rate : 19200
AVR Part : ATmega328PB
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : STK500
Description : Atmel STK500 Version 1.x firmware
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us
avrdude.exe: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude.exe: Device signature = 0x1e9516 (probably m328pb)
avrdude.exe: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude.exe: erasing chip
avrdude.exe: reading input file "C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex"
avrdude.exe: writing flash (32748 bytes):
Writing | ################################################## | 100% 0.00s
avrdude.exe: 32748 bytes of flash written
avrdude.exe: verifying flash memory against C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex:
avrdude.exe: load data flash data from input file C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex:
avrdude.exe: input file C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex contains 32748 bytes
avrdude.exe: reading on-chip flash data:
Reading | ################################################## | 100% 0.00s
avrdude.exe: verifying ...
avrdude.exe: 32748 bytes of flash verified
avrdude.exe: reading input file "0xCF"
avrdude.exe: writing lock (1 bytes):
Writing | ################################################## | 100% 0.02s
avrdude.exe: 1 bytes of lock written
avrdude.exe: verifying lock memory against 0xCF:
avrdude.exe: load data lock data from input file 0xCF:
avrdude.exe: input file 0xCF contains 1 bytes
avrdude.exe: reading on-chip lock data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of lock verified
avrdude.exe done. Thank you.
`
from atmega328pb-testing.
awatterott
commented on July 24, 2024
You have to choose as board "Atmel ATmega328PB Crystal Clock" otherwise the fuses are set for internal clock.
from atmega328pb-testing.
botletics
commented on July 24, 2024
Yes, for now I want to use 8MHz internal clock. I also tried 16MHz Crystal Clock and it burns the bootloader just fine, but when I upload code to it, 1s delay becomes 16s delay. Likewise with the 8MHz, 1s becomes 8s delay. It seems like the bootloader isn't actually setting it to the right clock rate even though it seems successful.
On the 328PB datasheet I may not be able to use 16MHz at 3.3V anyway.
from atmega328pb-testing.
awatterott
commented on July 24, 2024
Please send the log messages to confirm the fuses, otherwise I cannot help.
from atmega328pb-testing.
botletics
commented on July 24, 2024
Sorry, where are the log messages? Thanks.
from atmega328pb-testing.
awatterott
commented on July 24, 2024
I mean the log messages, when burning the bootloader with the correctly selected board.
from atmega328pb-testing.
botletics
commented on July 24, 2024
I'm sorry, I'm still not quite following what log message you are referring to. I pasted the entire verbose output (the stuff that prints out at the bottom).
from atmega328pb-testing.
botletics
commented on July 24, 2024
Also, one tweak I had to make using this Github repo is I had to change the avrdude.conf file located in C:\Program Files (x86)\Arduino\hardware\tools\avr\etc to be able to upload the code with "Upload Using Programmer". I added the following code at line 8711 (right under the m328p section):
part parent "m328"
id = "m328pb";
desc = "ATmega328PB";
signature = 0x1e 0x95 0x16;
ocdrev = 1;
;
Without that tweak, it would give me the message:
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
avrdude: AVR Part "atmega328pb" not found.
Would my tweak cause any issues? I replaced Arduino\hardware\tools with the folder in this repo (but only the folders with the same names) and added the atmega328pb folder. Am I using this repo correctly?
from atmega328pb-testing.
awatterott
commented on July 24, 2024
If you select as board "Atmel ATmega328PB Internal Clock" then the fuses will be set to use the internal clock and no external crystal, when burning the bootloader. The right board is "Atmel ATmega328PB Crystal Clock" for an external crystal and with this settings you should send the log messages.
from atmega328pb-testing.
botletics
commented on July 24, 2024
For now I would like to use 8MHz Internal, not the crystal. However, I ran it with 16MHz and here is the verbose output:
`C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude.exe -CC:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf -v -patmega328pb -cstk500v1 -PCOM7 -b19200 -e -Ulock:w:0xFF:m -Uefuse:w:0xFD:m -Uhfuse:w:0xDE:m -Ulfuse:w:0xE2:m
avrdude.exe: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf"
Using Port : COM7
Using Programmer : stk500v1
Overriding Baud Rate : 19200
AVR Part : ATmega328PB
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : STK500
Description : Atmel STK500 Version 1.x firmware
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us
avrdude.exe: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude.exe: Device signature = 0x1e9516 (probably m328pb)
avrdude.exe: erasing chip
avrdude.exe: reading input file "0xFF"
avrdude.exe: writing lock (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude.exe: 1 bytes of lock written
avrdude.exe: verifying lock memory against 0xFF:
avrdude.exe: load data lock data from input file 0xFF:
avrdude.exe: input file 0xFF contains 1 bytes
avrdude.exe: reading on-chip lock data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of lock verified
avrdude.exe: reading input file "0xFD"
avrdude.exe: writing efuse (1 bytes):
Writing | ***failed;
################################################## | 100% 0.06s
avrdude.exe: 1 bytes of efuse written
avrdude.exe: verifying efuse memory against 0xFD:
avrdude.exe: load data efuse data from input file 0xFD:
avrdude.exe: input file 0xFD contains 1 bytes
avrdude.exe: reading on-chip efuse data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: WARNING: invalid value for unused bits in fuse "efuse", should be set to 1 according to datasheet
This behaviour is deprecated and will result in an error in future version
You probably want to use 0xf5 instead of 0xfd (double check with your datasheet first).
avrdude.exe: 1 bytes of efuse verified
avrdude.exe: reading input file "0xDE"
avrdude.exe: writing hfuse (1 bytes):
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude.exe -CC:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf -v -patmega328pb -cstk500v1 -PCOM7 -b19200 -Uflash:w:C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex:i -Ulock:w:0xCF:m
avrdude.exe: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/tools/avrdude.conf"
Using Port : COM7
Using Programmer : stk500v1
Overriding Baud Rate : 19200
Writing | ################################################## | 100% 0.01s
avrdude.exe: 1 bytes of hfuse written
avrdude.exe: verifying hfuse memory against 0xDE:
avrdude.exe: load data hfuse data from input file 0xDE:
avrdude.exe: input file 0xDE contains 1 bytes
avrdude.exe: reading on-chip hfuse data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of hfuse verified
avrdude.exe: reading input file "0xE2"
avrdude.exe: writing lfuse (1 bytes):
Writing | ################################################## | 100% 0.01s
avrdude.exe: 1 bytes of lfuse written
avrdude.exe: verifying lfuse memory against 0xE2:
avrdude.exe: load data lfuse data from input file 0xE2:
avrdude.exe: input file 0xE2 contains 1 bytes
avrdude.exe: reading on-chip lfuse data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of lfuse verified
avrdude.exe done. Thank you.
AVR Part : ATmega328PB
Chip Erase delay : 9000 us
PAGEL : PD7
BS2 : PC2
RESET disposition : dedicated
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :
Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack
----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
eeprom 65 20 4 0 no 1024 4 0 3600 3600 0xff 0xff
flash 65 6 128 0 yes 32768 128 256 4500 4500 0xff 0xff
lfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
efuse 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
lock 0 0 0 0 no 1 0 0 4500 4500 0x00 0x00
calibration 0 0 0 0 no 1 0 0 0 0 0x00 0x00
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
Programmer Type : STK500
Description : Atmel STK500 Version 1.x firmware
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us
avrdude.exe: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.02s
avrdude.exe: Device signature = 0x1e9516 (probably m328pb)
avrdude.exe: NOTE: "flash" memory has been specified, an erase cycle will be performed
To disable this feature, specify the -D option.
avrdude.exe: erasing chip
avrdude.exe: reading input file "C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex"
avrdude.exe: writing flash (32748 bytes):
Writing | ################################################## | 100% 0.00s
avrdude.exe: 32748 bytes of flash written
avrdude.exe: verifying flash memory against C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex:
avrdude.exe: load data flash data from input file C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex:
avrdude.exe: input file C:\Program Files (x86)\Arduino\hardware\atmega328pb\avr/bootloaders/optiboot_m328pb.hex contains 32748 bytes
avrdude.exe: reading on-chip flash data:
Reading | ################################################## | 100% -0.00s
avrdude.exe: verifying ...
avrdude.exe: 32748 bytes of flash verified
avrdude.exe: reading input file "0xCF"
avrdude.exe: writing lock (1 bytes):
Writing | ################################################## | 100% 0.02s
avrdude.exe: 1 bytes of lock written
avrdude.exe: verifying lock memory against 0xCF:
avrdude.exe: load data lock data from input file 0xCF:
avrdude.exe: input file 0xCF contains 1 bytes
avrdude.exe: reading on-chip lock data:
Reading | ################################################## | 100% 0.01s
avrdude.exe: verifying ...
avrdude.exe: 1 bytes of lock verified
avrdude.exe done. Thank you.`
from atmega328pb-testing.
awatterott
commented on July 24, 2024
The messages do not look okay. Maybe because of the Markdown parser.
Please put them in code tags.
from atmega328pb-testing.
botletics
commented on July 24, 2024
I have attached a .txt file with the verbose output. I think that should be formatted better, sorry.
VerboseOutput_8MHzInternal.txt
from atmega328pb-testing.
awatterott
commented on July 24, 2024
Its the same. Have a look at line 94 - there is an avrdude start, but the previous start is not finished.
Please use also an external crystal, because the internal clock is not very accurate and so there can be problems with the UART.
from atmega328pb-testing.
botletics
commented on July 24, 2024
I have a 16MHz resonator, but I can't use it at 3.3V so that's why I am switching to 8MHz internal.
from atmega328pb-testing.
awatterott
commented on July 24, 2024
Have you tried it? With a normal temperature of about 20°C there will be no problems.
from atmega328pb-testing.
botletics
commented on July 24, 2024
Yes, when I upload blink.ino at 16MHz it again reverts back to 1MHz internal for some reason. (1s delay becomes 16s). Same with 8MHz internal.
from atmega328pb-testing.
awatterott
commented on July 24, 2024
This can also happen, when you select the wrong board/clock settings in the Arduino IDE.
Burn the bootloader with the correct board (external crystal) and then try to flash a Sketch via the bootloader.
from atmega328pb-testing.
botletics
commented on July 24, 2024
Yes, I tried that. I burned the bootloader at 16MHz then used "Upload Using Programmer" with my Arduino as ISP and the timing was off. I could never seem to upload via FTDI with the bootloader in place. I can only upload via "Upload Using Programmer" from the IDE while connecting the chip to the Arduino via SPI.
from atmega328pb-testing.
botletics
commented on July 24, 2024
I found out that 8MHz now works (I had to manually reset the chip otherwise it would blink every 8s instead of 1s). 16MHz doesn't work per the spec sheet.
from atmega328pb-testing.
Related Issues (20)
- Port Manipulation Problem HOT 1
- Cannot compile HOT 4
- High power consumption in deep sleep HOT 2
- SPCR, SPDR, and SPSR are not declared in the scope HOT 1
- compile error #include <twi_def.h> HOT 1
- Upload bootloader fail HOT 3
- ADC6 always reading 1023 HOT 1
- PlatformIO support HOT 2
- Explanation of Wire1 library HOT 1
- Precompiler issue with Wire.h HOT 2
- Bootloader and Sketch Upload with ISP works, Serial doesn't HOT 3
- Dead chips HOT 3
- Optiboot PB loader on Nano Clone no worky HOT 4
- Atmega328PB and RFM95W HOT 3
- USART1 instead of USART0 HOT 1
- Device signature error while uploading bootloader HOT 3
- m328pb flash programming using UART. HOT 1
- Problems with simultaneous master/slave HOT 3
- __AVR_HAVE_PRR0_PRTWI0 not correctly defined HOT 1
- SPI1 HOT 2
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Microsoft
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Google
Google ❤️ Open Source for everyone.
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Alibaba
Alibaba Open Source for everyone
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D3
Data-Driven Documents codes.
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Tencent
China tencent open source team.
from atmega328pb-testing.