Sketch upload freezes during write

Question

I'm trying to upload a huge sketch to my Uno R2. It's compiling just fine but it fails to upload at 94% of writing to flash...

The program is so large because of a big array of data in a separate .h file:

#include <avr/pgmspace.h>
const unsigned char PROGMEM data[] = {
 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7f, 0x80, 0x7f, 0x80, 0x7f, 0x80, (etc...)

A test sketch with just 12 bytes of data uploads fine, so the problem is either with the size or some weird bug triggered by some of the data.

Unless i'm missing something, this should technically work.

Command:

 /home/hatagashira/.arduino-1.6.5/hardware/tools/avr/bin/avrdude -C/home/hatagashira/.arduino-1.6.5/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -carduino -P/dev/ttyACM0 -b115200 -D -Uflash:w:/tmp/build8921209068074674980.tmp/program.cpp.hex:i

Output:

avrdude: Version 6.0.1, compiled on Apr 14 2015 at 19:04:16
 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
 Copyright (c) 2007-2009 Joerg Wunsch
 System wide configuration file is "/home/hatagashira/.arduino-1.6.5/hardware/tools/avr/etc/avrdude.conf"
 User configuration file is "/home/hatagashira/.avrduderc"
 User configuration file does not exist or is not a regular file, skipping
 Using Port : /dev/ttyACM0
 Using Programmer : arduino
 Overriding Baud Rate : 115200
 Setting bit clk period : 5.0
 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 20 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
 Hardware Version: 3
 Firmware Version: 3.3
 Vtarget : 0.3 V
 Varef : 0.3 V
 Oscillator : 28.800 kHz
 SCK period : 3.3 us
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.00s
avrdude: Device signature = 0x1e950f
avrdude: safemode: lfuse reads as 0
avrdude: safemode: hfuse reads as 0
avrdude: safemode: efuse reads as 0
avrdude: reading input file "/tmp/build8921209068074674980.tmp/program.cpp.hex"
avrdude: writing flash (30110 bytes):
Writing | ############################################### | 94% 5.10savrdude: stk500_recv(): programmer is not responding

• James Waldby - jwpat7: To make your question more answerable, first, make up a large example that succeeds in loading, and an example with a hundred more numbers that fails to load; second, edit the question to quote the compiler's size messages [eg, like "Sketch uses 20,112 bytes (65%) of program storage space. Maximum is 30,720 bytes."] for the failing and successful examples.

Answer 1

My two arduino nanos did flash and run the program correctly. I suspect a problem with the uno's serial communication but unwilling to troubleshoot further (i only have one uno). I decided to switch to the nano for further prototyping.