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by GregsGarage
Mon Mar 04, 2013 11:44 am
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 82415

Re: LTC6802 based 12 cell slave.

Next item will be a current sensor connected to the master/slave bus. I can use the same basic design but instead of using a 6802 put a allegro or similair current sensor on the slave. The pic can be set to take current readings every 10ms maybe and keep a tally of amp hours in out and then send th...
by GregsGarage
Sun Mar 03, 2013 4:42 pm
Forum: BMS thread
Topic: Maximite Master
Replies: 39
Views: 50105

Re: Maximite Master

Simple charger control added and working with only 3 new lines of code! :D
Updated github master branch.
by GregsGarage
Sun Mar 03, 2013 11:55 am
Forum: BMS thread
Topic: Maximite Master
Replies: 39
Views: 50105

Re: Maximite Master

I need 56 bars (Cells) on screen can it manage that? The CMM (colour maximite) in mode 4 has a resolution of 240x216 pixels, half of the normal 480x430 (or composite pal which has 304x216 monocrome output only) The bars are 3 pixels wide with a one pixel gap so 240/4 = 60 cells. :D At the moment yo...
by GregsGarage
Sat Mar 02, 2013 8:59 pm
Forum: BMS thread
Topic: Maximite Master
Replies: 39
Views: 50105

Re: Maximite Master

Peter, if you liked that one, how about this? http://img268.imageshack.us/img268/1659/screenshot.bmp The background is a .bmp image created in paint that the maximite loads. It then fills in the boxes. 8) http://img401.imageshack.us/img401/9755/screenlg.png Shame my artistic ability isn't up to much...
by GregsGarage
Sat Mar 02, 2013 8:44 pm
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 82415

Re: LTC6802 based 12 cell slave.

I've added a new command "200". Sending the ASCII character 200 on the slave bus will be recieved by the first slave. It will then send command 0x04 to the next slaves (6802 does A/D and loads cell values into its register) and then sends 0x10 to the next slaves which gets the cell data re...
by GregsGarage
Thu Feb 28, 2013 11:23 pm
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 82415

Re: LTC6802 based 12 cell slave.

Some of you may recall a while back I proposed a central point for all files related to this bms project. I had opened an account with launchpad.net but never really got my head 'round it. :oops: I'm sure it's fine for programmers, but for the rest of us something simpler is needed. The forum is ver...
by GregsGarage
Thu Feb 21, 2013 9:10 pm
Forum: BMS thread
Topic: Old BMS Hardware Thread
Replies: 613
Views: 282066

Re: Old BMS Hardware Thread

I've just read out the config bits and from one of my working slaves. Config 0CD4
by GregsGarage
Thu Feb 21, 2013 12:48 pm
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 82415

Re: LTC6802 based 12 cell slave.

I've now got six of my slaves connected to all 48 cells in my car. Rapid had 3 meter usb cables cheap so at the moment they are all connected with some very long usb cables and it all seems to be working fine. 8) So here's my plan for next things to do; Make a final version of the slave board. I am ...
by GregsGarage
Thu Feb 21, 2013 8:30 am
Forum: BMS thread
Topic: Old BMS Hardware Thread
Replies: 613
Views: 282066

Re: Old BMS Hardware Thread

Sounds like the problem is in the slaves. Are the config bits set correctly? Load up the hex in pickit 2 and post the config bits shown in top right corner.
by GregsGarage
Wed Feb 20, 2013 11:06 pm
Forum: BMS thread
Topic: Maximite Master
Replies: 39
Views: 50105

Re: Maximite Master

I've got the 6802 slaves connected to my Colour Maximite master. Here's a screen shot of the charging just before it finished. Lot's of work to do still but so far it's working well. I'm running both bms side by side and they both read the same, well at least within 10mv, but that has more to do wit...

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