need help with optiboot @22.1184 MHz & 921600 Baud

[jar10623]

befor for all of my 5 mighty 1284p ich use Optiboot for 1M @16MHz

now i change the crytal up to 22.1184 MHz, it works but i must build a new bootloader and i don't know how.

make (winavr) with target atmega1284p give a error

C:\optiboot>make atmega1284 /usr/local/avr/bin/avr-gcc -g -Wall -Os -fno-inline-small-functions -fno-split-w ide-types -mshort-calls -mmcu=atmega1284p -DF_CPU=22118400L '-DLED_START_FLASHE S=3' '-DBAUD_RATE=115200' '-DBIGBOOT' -c -o optiboot.o optiboot.c process_begin: CreateProcess(NULL, /usr/local/avr/bin/avr-gcc -g -Wall -Os -fno- inline-small-functions -fno-split-wide-types -mshort-calls -mmcu=atmega1284p -DF _CPU=22118400L -DLED_START_FLASHES=3 -DBAUD_RATE=115200 -DBIGBOOT -c -o optiboot .o optiboot.c, ...) failed. make (e=3): Das System kann den angegebenen Pfad nicht finden. make: *\ [optiboot.o] Error 3

path error, but wich path why ? @win there is no /usr/local?

in avr studio 4.18 sr3 is a warning ../optiboot.c:256: warning: 'flash_led' declared 'static' but never defined

but i think that doesn't interessed

build was ok for hex but it doesn't work i don't know where i must change the baudrate for 921600 Baud and how put it in the boards.txt in arduino

[JChristensen]

See https://github.com/Optiboot/optiboot/wiki/CompilingOptiboot

[jar10623]

sorry that wouldn't help

this show the way to a java use in Arduino, but first path not found -> the reason name in Arduino looks like avr-gcc but my win set path is to winavr gcc so avr-gcc is not found.

ok i have the optiboot sourcen an a aps für studio but there is the arduino led on PortB1 (1 Problem i found) i corrected to PB7

i think it dosn't work because no LED

then i think it dosn't work because 22 MHz and low voltage 4,3 to 4,7V

but this is not the reason

Bootloder is build good, programming is good with verify the mighty started with my 5 flashes on LED and 22MHz

but i can not program via Arduino

i try 230400 Bd an put it in the mightys board.txt same with 115200 Bd

i don't know what can i do, wich #defines wich options are missing? on Arduino i see this Mistake, every try:

Binäre Sketchgröße: 1.606 Bytes (von einem Maximum von 130.048 Bytes) avrdude: verification error, first mismatch at byte 0x0002 0x67 != 0x46 avrdude: verification error; content mismatch

why work mighty with 1 M Bd? do you use avrdude? why ist there a remark in the source

if F_CPU > 16000000L

define BAUD_RATE 230400L // Highest rate Avrdude win32 will support

how it is posible to use 1M and why is my mistake in AVRdude with 115k

[jar10623]

please would you help me build two

bootloader

1. 22.1184 MHz @921600 Baud
2. 14.7456 MHz @115200 Baud and better show me the way (peter frampton) https://www.youtube.com/watch?v=zLgeTtYwQ7o

i think one MUST be work @arduino

[JChristensen]

Sorry, I just don't have the time at present. This is a bit off-topic for this repo anyway. Suggest trying the Arduino forum.

[jar10623]

arduino forum is big, have a link at the right place please?

all the same, with the fastLED Problem i get no help from autors because they have no 1284p an i must go my own way with F_CPU * 10L/9L for m1284p

[JChristensen]

Microcontrollers Standalone or alternative microcontrollers, in-system programming, bootloaders, etc. http://forum.arduino.cc/index.php?board=67.0

[jar10623]

thanks

[jar10623]

sorry that the same problem before over arduino, i can not build.....

but i wounder why you build a 16MHz mighty? 1284p can go up to 20Mhz or maybe 22MHz for Baudrate it is better to take an baud rate crystal 7.xx 14.xx

16 Mhz is so unusefull

[JChristensen]

The 1284P provides more flash and SRAM than the 328P, but its CPU specs are the same; it's not meant to address processing capacity. You're welcome to your opinion but I prefer conservative designs, and certainly not overclocking. Anyway, 20MHz represents only a marginal speed improvement over 16MHz. If I need something with more horsepower, I'd look to double or triple the clock speed and/or go to a 32-bit machine. 16MHz works well with the Arduino ecosystem and I've never had problems with baud rate tolerances.