(SOLVED)Breadboard arduino wont program.

Using Arduino IDE 1.x
1

ok first of all, i did all the troubleshooting( i didn't post as soon as the issue arised)

so i built a Diyduino like this: http://www.arduino.cc/en/Main/Standalone except i used a SP3232e IC (like a Max232). i have double checked all the wiring. the pre programmed LED blink works. it is a Arduino UNO from sparkfun.

it has both TX and RX going to/from computer and arduino. but i posted the pic of the IC scheme so that you guys can confirm i connected tx and rx correctly. I labeled where i connected on the IC, in terms of data not Vcc etc.

i get the error:

avrdude: stk500_getsync(): not in sync: resp=0x30
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51

in the arduino IDE when i attempt to upload the program. im sure i have the correct COM port and Board selected.

as it doesnt automatically reset when programming i have to manually presh the button once this shows up in the arduino IDE:

Binary sketch size: 8506 bytes (of a 32256 byte maximum)

so is anything wrong with the RS232 wiring? why is it not working? do i need to install any serial drivers even though i m not using a USB-serial adapter?

thanks

SOLUTION:
ok it turns out it was WIN7 fault that i got resp = 0x30 error in arduino IDE. i got that even w/o an arduino plugged in. so i tried another computer, presto!
and
i soldered the wires on to the DB9 (pin 5 was on pin 1 etc) and thus the inserted wires were wrong on the breadboard.

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2

Often the RX and TX have different meanings depending on if they are DTE or DCE see:-

I would try swapping round the RX and TX connections to the computer, or better still send stuff from a serial terminal application ans see that the TX pin from the computer's serial port actually waggles the RX line and not the TX line.

3

true! this is my setup: "9 pin DTE devices transmit on pin 3 and receive on pin 2." on my DB9 connector.

but what im confused about is the SP3232E pinout. what data connections go where. RS232 in/outs and logic ins/outs in the diagram. did i do it right?

4

AtMega Tx goes to Sipex pin 11, Atmega Rx goes to Sipex pin 12.

Sipex pin 14 goes to DB9 pin 2 (TX out)
Sipex pin 13 goes to DB9 pin 3 (RX in)
DB9 pin 5 goes to ground.

Maybe swap DB9 pins 2 & 3 if things don't work

5

thanks, exactly what i was looking for, will let you know if it works.

EDIT///

AtMega Tx goes to Sipex pin 11, Atmega Rx goes to Sipex pin 12.

Sipex pin 14 goes to DB9 pin 2 (TX out)
Sipex pin 13 goes to DB9 pin 3 (RX in)

tried that, doesnt work.

Maybe swap DB9 pins 2 & 3 if things don't work

still doesnt work.

added a ground connection from DB9 to the breadboard.
still doesnt work

eh oops i had the sipex ic in backwards :smiley:

6

ok, haha i had the 3232 sipex IC in backwards. so i re did the wiring, and found someone else with the same exact setup and checked my wiring to theirs. now i get:
avrdude: stk500_getsync(): not in sync: resp=0xbf
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x5d

sometimes its resp=0x00 or resp=0xff

i know the Sipex IC is connected right because i can hook up my serial charachter LCD to pin 13 of the Sipex IC and i can write stuff on it using the serial monitor. see new correct labeled data pinout below.

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7

Have you implemented the auto reset circuit?

Send the DTR into one of the RS232 inputs and take the output through a 0.1uF cap to the reset pin being pulled up to +5V with 10K.

8

yes now i get resp = 0x30 instead

9

ok it turns out it was WIN7 fault that i got 0x30. i got that even w/o an arduino plugged in. so i tried another computer, presto!
and
i soldered the wires on to the DB9 (pin 5 was on pin 1 etc) and thus the inserted wires were wrong on the breadboard.

SOlVED

10