Hello. I'm working on a pov design and want to make an integrated atmega2560 as the brains of the project. I have tried looking up a confirmation but as the atmega2560 is smd it doesn't have as much info online.
so I understand installing arduino bootloader and how tp do this. I will just use arduino isp or I have a usbasp . that allows the program to be loaded via serial communication but to program the chip via arduino ide can I use an arduino uno with the chip removed?
it uses a different programing atmega chip tham the atmega2560 does. will this matter. I not 100% on the workings of this exactly. does the boot loader require the right usb to serial chip? or is the communication universal across these chips.
ftdi is my other option but before I go out an buy this I wanted to know if first option will work. Also does the bootloader support ftdi programing or does there need to be alterations?
thanks in advance. not really too confident on this form of communication.
if that's not clear the usb to serial chip is different on the uno and mega. so I'm not sure if the bootloader are different tp reflect this.
if they are different are they compatible. so if I use uno ( as I rake the chip out and isolate the usb tp serial ) to program to atmega256 will this work?
does the bootloader for atmega2560 support ftdi usb to serial programming on the TX and rx lines?
Yes. Make sure to connect DTR thru a 0.1uF cap (100nF) to the 2560 Reset pin, with a 10K pullup from Reset to Gnd.
Programming with File:Upload using Programmer is also possible with no bootloader needed.
Do burn one first to get the fuses set correctly for external 16 MHz oscillator, brown out detection, etc.
thanks for the responses. exactly what I wanted to hear.
I was thinking about just programing with isp (. that was my fall back) but wanted serial communication for debugging. then I was thinking about it last night. there's nothing stopping me just debugging from bluetooth is there. Serial2 print all my debugging figures and just go off my phone? I did want bluetooth conectivity anyways.
makes me think something else. if a chip has no bootloader but is connected to ftdi usb to seeial circuit will the seeial monitor still show up if it's on the right port?
You can get USB->serial cables, so long as the cable is plugged into your computer you have a
serial device - doesn't matter whats on the RX TX lines till you try to talk to it.
Tangles84:
makes me think something else. if a chip has no bootloader but is connected to ftdi usb to seeial circuit will the seeial monitor still show up if it's on the right port?
yes. if your program is writing to serial port, then it will show up on the serial monitor.
serial port has nothing to do with having a bootloader or not.