Alternative code to serprog-duino.
We're in process of melding all the good bits of serprog-duino into frser-duino and deprecating serprog-duino.
Available targets (same as with serprog-duino):
For the Arduinos with an FTDI
compatible flashrom arguments: flashrom -p serprog:dev=/dev/ttyUSB0:2000000
Other boards using an hardware USB<->Serial converter might work too.
For the Arduino with a 8u2 or a 16u2
compatible flashrom arguments: flashrom -p serprog:dev=/dev/ttyACM0:115200
make - builds
make program - "flashes"
These are by default effectively synonyms for u2 and flash-u2,
except that "make" doesnt clean out the previous build if it sees no changes.
You can change what the traditional targets do by either changing the defines
at the beginning of the makefile, or using environment variables - for example:
BLBAUD=115200 SERIAL_DEV=/dev/ttyUSB1 make program
Note: the repository has a submodule, clone with --recursive.
About the various (broken) usb-serial converters
Arduino Uno with ATMega 8U2/16U2: their default firmware is quite broken,
but the default settings works around it at 115200 (slowly).
If you're willing to test, I have an alternative firmware for it:
with that firmware you should be able to use it as if it was an FTDI, meaning with make ftdi and at 2Mbaud. This means that for this case it would be valid to say
make ftdi; make flash-u2. The flash targets dont check what kind of binary they're flashing.
(Note: My benchmarks say it is still slower than the FTDI.)
A "VISduino" named Uno R3 clone with with a CH340G:
It is a cheap usb-serial converter chip, and if it in general works on your computer (google had reports of it not working with all usb chipsets) you can treat it like an FTDI with a maximum baudrate of 115200. Claims 2Mbaud but apparently doesnt have big enough buffers for operation at that speed.
Commands would be (if you dont touch the defaults in Makefile):
DFLAGS=-DFTDI make clean alland
SERIAL_DEV=/dev/ttyUSB0 make program
Using an Arduino and an external usb-serial converter
If you have an Arduino without a FTDI chip, but you are lucky enough to have an
extra usb-serial converter laying around, you can use it to speed up the flashing.
Just connect the usb-serial converter with the RX(Pin 0), TX(Pin 1) and GND pins
on your Arduino and use the instructions for the
ftdi target from above.