Cytron Technical Forum

Posted: **Thu Jul 10, 2014 1:01 pm**

Hi,

I try to load a sketch using IDE connecting UC00A with Arduino Uno.

I got the following error: "stk500_getsync(): not in sync: resp=0x00"

Is my connection correct?
UC00A -> Arduino Uno
DTR -> Reset
Vsel -> 5V
RX -> TX
TX -> RX
GND -> GND
CTS -> GND

Anyone know what is the problem or can help?

Thks - BS

Posted: **Thu Jul 10, 2014 1:47 pm**

You should put a 0.1uF capacitor between DTR and Reset of Arduino UNO. BTW, a new Atmega328 will not works because the chip require bootloader to function.

Posted: **Sun Jul 13, 2014 12:03 pm**

Ober Choo,

It's NOT working..

Same Error code "stk500_getsync(): not in sync: resp=0x00"
I already add a 0.1uf ceramic capacitor between the reset pin(Arduino Uno) and DTR pin(UC00A).

I trying to load the simple blinking example through UC00A instead of the USB port on a Arduino Uno
*The Atmega328 come with the Arduino Uno thus bootloader is already there.

The board on the software IDE, I have choose Arduino Uno, is that correct ?
Any help will be appreciated..

Thks - BS

Posted: **Tue Jul 15, 2014 9:40 am**

Well, a picture of actual hardware and wiring will be helpful.

Posted: **Wed Jul 16, 2014 10:55 am**

Ober,

Attached is the photos in detail on pins connection and software error.

: Arduino Uno / UC00A connection

Thks. - BS

Posted: **Thu Jul 17, 2014 9:28 am**

It seem you have the Arduino UNO board, why don you load the program using normal way? Which is to use the USB cable and choose the COM Port and load it.

Posted: **Thu Jul 17, 2014 11:28 am**

Ober,

Yes, I am using Arduino Uno.
I am trying to program using UC00A instead of the standard built-in USB port.
(*I have no problem connecting and programming using the USB port)

Is there some limitation on the Arduino Uno board ?
Technically it should be possible right ?

Thks - BS

Posted: **Thu Jul 17, 2014 8:43 pm**

We have never tried this method to load program into Arduino UNO before since there is on board USB to serial ready to be used.

Anyway the method to load program using UC00A Rev2.0 is being done with BBFuino and it is working fine.

In your case, it might fail because the on board USB to UART is pulling the TX pin (RX of ATmega328) high and UC00A R2 cannot transmit data to Atmega328 properly.

Posted: **Fri Jul 18, 2014 11:32 am**

Ober,

This could be due to the same reason - Pullup resister on both TX & RX pins.
Will test out with just the ATmega328 chip on breadboard.

Thks - BS

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