i am testing with a ATmega1284p.
Everything works fine, via ISP.
Some Minutes ago, I tried to connect a Serial-Usb Converter from Sparkfun FT232RL to the mcu.
Modified the makefile of a suiting Bootloader (modified Sanguino644p) to 20Mhz (that crystal I am using)....
AVR_FREQ = 20000000L
Compiled, then burnd into mcu.
I can't upload via Upload Sketch in IDE... TXD blinks 3 times then i get
avrdude: stk500_getsync(): not in sync: resp=0x00.
I can't explain why, because burning bootloader via isp is done fine, uploading sketches via isp is done fine....
Maybe i got an wireing issue....
VCC > VCC GND > GND TXD > RXD RXD > TXD DTR > Reset CTS > MISO
I've also changed back my isp programmer to
So, actually: 1. right serial-port is selected. 2. IDE should upload via bootloader 3. Speed of crystal is compiled into bootloader 4. modified bootloader sits on mcu 5. ISP is working in all aspects.
But, txd blinks, then i get that error.
avrdude: stk500_getsync(): not in sync: resp=0x00
If i change boards.txt to
the same happens.
Seems, that the bootloader isn't "booting"....
How to verify....? What is the next step to check?