Hello All,
 
I'm looking to flash my atmel in robostix using gumstix as my ISP. I use the tweener board to connect gumstix to my computer. What I found is that I cannot type anything at the terminal if I have all three (gum-robo-tweener)connected together.
After some research, I find that I need to mod my tweener to break the Rxd line going to robostix. Does this mod need to be done in my case? I thought, it need to be done, if I need to use serial communication with the robostix... Just want a second opinion before I mod the tweener.
Also, could somebody tell me what features I might miss, if I go ahead and do the mod?
 
thanks,
Vijay.