NerdKits - electronics education for a digital generation

You are not logged in. [log in]

NEW: Learning electronics? Ask your questions on the new Electronics Questions & Answers site hosted by CircuitLab.

Project Help and Ideas » MakeFile & USB TTL/UART Module Help Please

August 25, 2009
by Nerdful_com
Nerdful_com's Avatar

I bought a USB breakout board to replace the NerdKit USB dongle and serial TTL converter board. It was really cheap on EBay (USB To TTL Converter Module cp2102 arm9 max232) and I could not refuse. Link on http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300327101010.

I have been able to get it to work communicating with UART (send data to and from PC) without issues, but I can not load a script (C code) on to the MCU as I have to change something in the MAKEFILE I am assuming. Basically I have to use the NErdKit header to program the ATmega168, then I can use the USB board I bought without problems.

See this line in our MAKEFILE; AVRDUDEFLAGS=-c avr109 -p m168 -b 115200 -P COM12, the "avr109" lets the kit know we are setting up for suitable connection for NerdKit. If we change the avr109 to "pada", then it attempts to look for a printer port ("stk500" and "avrispmkII" is for a type of ISP, other words that can be used "ponyser", "jtag1"). I need to know what word I need to replace "avr109" with to get it to program to my new USB board.

www.Nerdful.com

August 25, 2009
by Nerdful_com
Nerdful_com's Avatar

When I try to upload any code to my MCU get this error: make:

*** [project-upload] Error 1

I:\DRIVERS\NERDKITS.com\Code\Code\initialload>make
avrdude -c avr109 -p m168 -b 115200 -P COM12 -U flash:w:project.hex:a
avrdude: ser_open(): can't open device "COM12": The system cannot find the file specified.

make: *** [project-upload] Error 1
August 25, 2009
by Nerdful_com
Nerdful_com's Avatar

I fixed/figured it out myself through much trial and error. Seems COM12 is too high, if I forced the com to become com5, then it works just fine!

Sorry for the bother...

Here's a pic:

www.NERDFUL.com RULES!

August 29, 2009
by pedroh96
pedroh96's Avatar

Pretty cool, Nerdful!

Post a Reply

Please log in to post a reply.

Did you know that microcontrollers have two different kinds of memory, program space (flash) and SRAM? Learn more...