0

I programming atmega328P bootloaded with an FTDI.

Some tutorial mentions that you have to connect the DTR to the reset pin:

http://electronics-diy.com/FT232RL_USB_to_Serial_Adapter_for_PIC_AVR_ATMEGA_ARDUINO_MCUs.php

Is that so? Because some don't, they just say rx,tx is enough. I still can't program the chip with the error:

 avrdude -p m328p -P /dev/ttyUSB0 -c avrisp -b 9600 -n -v -v -v

avrdude: Version 5.11.1, compiled on Oct 18 2011 at 21:17:35
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2009 Joerg Wunsch

         System wide configuration file is "/etc/avrdude.conf"
         User configuration file is "/root/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : /dev/ttyUSB0
         Using Programmer              : avrisp
         Overriding Baud Rate          : 9600
avrdude: ser_recv(): programmer is not responding
avrdude: stk500_recv(): programmer is not responding

avrdude done.  Thank you.

I tried different baud rates, no matter what it's not responding. Linux recognizes the FTDI as:

Sat Feb 13 22:52:14 2016] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[Sat Feb 13 22:52:14 2016] ftdi_sio 1-2.1:1.0: device disconnected
[Sat Feb 13 22:52:19 2016] usb 1-2.1: new full-speed USB device number 73 using uhci_hcd
[Sat Feb 13 22:52:20 2016] usb 1-2.1: New USB device found, idVendor=0403, idProduct=6001
[Sat Feb 13 22:52:20 2016] usb 1-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[Sat Feb 13 22:52:20 2016] usb 1-2.1: Product: FT232R USB UART
[Sat Feb 13 22:52:20 2016] usb 1-2.1: Manufacturer: FTDI
[Sat Feb 13 22:52:20 2016] usb 1-2.1: SerialNumber: A6004mhS
[Sat Feb 13 22:52:20 2016] ftdi_sio 1-2.1:1.0: FTDI USB Serial Device converter detected
[Sat Feb 13 22:52:20 2016] usb 1-2.1: Detected FT232RL
[Sat Feb 13 22:52:20 2016] usb 1-2.1: FTDI USB Serial Device converter now attached to ttyUSB0
[Sat Feb 13 22:56:25 2016] usb 1-2.1: USB disconnect, device number 73
[Sat Feb 13 22:56:25 2016] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
[Sat Feb 13 22:56:25 2016] ftdi_sio 1-2.1:1.0: device disconnected

Well my questions now are:

1, When I use the Arduino IDE to program a barebone 328P with this FTDI what should be the BOARD and what should be the PROGRAMMER?

Right now I have it on Arduino Nano/Atmega328 + AVRISP mkII

Although I tried almost all... I think something else is wrong.

2, Should I be able to get any result with doing the previous:

 avrdude -p m328p -P /dev/ttyUSB0 -c avrisp -b 9600 -n -v -v -v

command WITHOUT connecting the barebone chip? I think not, since this doesn't act like a fully fledged MCU just like a serial converter.

Thanks

migrated from electronics.stackexchange.com Feb 14 '16 at 18:09

This question came from our site for electronics and electrical engineering professionals, students, and enthusiasts.

  • You may get away with quicky resetting the AVR after you started avrdude. The bootloader kicks in at that moment and listens for an incoming flash image. Use arduino for the programmer type. You may have to fiddle with baudrate, not sure what the default baudrate is. – jippie Feb 14 '16 at 11:31
  • I have used the following commands in the past to program an Arduino without using the IDE: mcu=atmega1280, freq=16000000L, baud=57600, port=/dev/ttyUSB002, avrdude -p$mcu -carduino -P$port -b$baud -D -Uflash:w:./project.hex:i – jippie Feb 14 '16 at 11:48
  • Poor man's make file for Proof of Concept purposes only. – jippie Feb 14 '16 at 11:55
1

Right now I have it on Arduino Nano/Atmega328 + AVRISP mkII

Tha AVRISP is not an FTDI programmer. How do you have it wired up?

See: How to make an Arduino-compatible minimal board

From that page, this is how I hooked up my FTDI cable:

FTDI connections

And a close-up:

Close-up of FTDI

You need RTS, via a 0.1 µF capacitor (in series) in order to trigger a reset.

0

You need to connect DTR to the reset pin because the Arduino IDE (really avrdude) needs to be able to reset the processor in order to return control to the bootloader, which will then receive the new program. When an Arduino board is running your sketch, the serial port is available for use by the sketch; it can't be used to upload a new program.

To answer your first question, you should set the board to whatever your board actually is. You don't have to worry about the programmer. It's only used if you use the "upload with programmer" function. The normal "upload" function uses the serial port to send the sketch to the board via the bootloader. That's what you want. Note that while you don't have to set the programmer, you do have to set the port.

You can use avrdude to program the Arduino through the serial port via the bootloader. That's exactly what the IDE does. You have to specify the port just as you do in the IDE. To determine the other settings, look up your board in the Arduino IDE's boards.txt file. Most of what boards.txt does is tell the IDE how to invoke avrdude.

I suspect that one reason why avrdude isn't working for you is that you've set the baud rate to 9600. According to boards.txt the upload speed for the Nano with the ATmega328P is 57600.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.