Project:Nanode/PoorMansCable

Health Warning: This build is experimental and has not yet been verified.

What?

Proposed BOM

1 x MAX232A at 86p each+vat

OR

1 x *202* at 61p each+vat

OR

1 x SMD ones are around 30p

4 x '100nF Capacitor' at ~2p each

1 x 9 pin D connector at 31p each+vat

1 x header socket 1 by 6 sub-20p

1 x pcb todo: add link to file

1 x USB to RS232 at £1.14

Overall cost, under £2+the pcb

Why?

The current solution for programming the arduino costs £12 Ebay

Puzzle Pieces

FTDI Cable Pinout

1. (Black) GND
2. (Grey) /CTS
3. (Red) VCC (5V supplied by USB power)
4. (Orange) TXD (data out of cable/pc)
5. (Yellow) RXD (data into cable/pc)
6. (Green) /RTS

Nanode Pinout

Starting with the pin at the end nearest the reset button & USB connector:

1. Gnd
2. no connection
3. Vcc (5V accepted from the FTDI cable)
4. Rxd (data into AVR)
5. Txd (data out of AVR)
6. /Reset

avrdude

Command:

 avrdude -p atmega328p -b 57600 -P /dev/ttyUSB0 -U flash:r:./blah.hex -v -c arduino

Terminal output:

avrdude: Version 5.10, compiled on Mar 23 2010 at 15:03:00
         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 "/home/samuel/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

         Using Port                    : /dev/ttyUSB0
         Using Programmer              : arduino
         Overriding Baud Rate          : 57600
         AVR Part                      : ATMEGA328P
         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     5     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 : Arduino
         Description     : Arduino

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xe0

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xe0
         Hardware Version: -1074437604
         Firmware Version: 151804672.-1215592768

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xe0

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xe0

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xe0
         Vtarget         : 15004184.0 V
         Varef           : 307937452.8 V
         Oscillator      : 0.027 Hz
         SCK period      : 12268194.5 us


avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0xe0

avrdude: stk500_getparm(): (a) protocol error, expect=0x14, resp=0x00
avrdude: stk500_initialize(): (a) protocol error, expect=0x14, resp=0xe0
avrdude: initialization failed, rc=-1
         Double check connections and try again, or use -F to override
         this check.

avrdude: stk500_disable(): protocol error, expect=0x14, resp=0xe0

avrdude done.  Thank you.