replacement CM11a firmware available

Feb 07, 2011 2 Replies

Rate this thread:

Dan Lanciani 15 years ago

I have made available on

formatting link

source for replacement firmware for the CM11a along with a unix daemon that provides my standard tcp/ip interface.

The replacement firmware is in no way compatible with the OEM firmware and also requires certain pins to be rerouted between the PIC and CM11a board.

The firmware provides a low-level interface to the power line. Received bits are grouped 6 at a time and sent to the host. The host transmits by specifying a bit string and a repeat count. All encoding/decoding is done in the host. Normally once the host has seen 7 or more zero bits further zeroes are suppressed, but for full real-time analysis a flag is provided to force all bits to be transferred. An additional flag is available to disable three-phase transmission support and the supplied daemon sets this flag by default.

I've been running this code for a few days but it should of course be considered preliminary. Further documentation will be available depending on the level of interest...

Dan Lanciani ddl@danlan.*com

Vote

Dave Houston 15 years ago

Dan,

About 3 years back, I persuaded Dom Kinzer of ZBasic to add low level X-10 functions implemented in the background and buffered a la a software UART. It automatically handles all I/O, setting flags to signal a reception, etc. and filling a bit array as a signal is received. For output you merely fill a bit array and bits are sent automatically at ZC. It even incorporates the extra AGC signals needed with a CM15A should you want to play with it.

The cheapest ZBasic chip is the ZX-328n (DIP-28) at $10 or the ZX-32n (TQFP-32) at $15. Both have a bootloader preloaded. The ZBasic software is free. It compiles to native Atmel machine code for the 'n' version of the chips.

formatting link

I have made available on

formatting link

source for replacement

Vote

Jeff Volp 15 years ago

Since a lot of people still use the discontinued CM11A as the powerline interface for PC-based automation software, I've been working on a XTB version with a RS232 interface. It is based on the new PIC16F1823, and will emulate the "real-time" CM11A command protocol. It will not include timers, macros, or any other "controller" functions.

Jeff

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required