Edit by Peter 28/12/12
Just to clear up any confusion the production IMAC&C unit for the HCH1 is a standalone device seperate from the OBDIIC&C display.
The first few pages of this thread however discuss an attempt to make the OBDIIC&C device perform both functions, this did not work correctly so was abandonded in favour of the standalone device which works well.
The development of the standalone IMAC&C for the HCH1 beings at about this post
http://www.insightcentral.net/forum...orums/other-honda-hybrids-discussion/21887-imac-c-hch1-civic-26.html#post235068
I hope that helps.
PS There is some free demo code available in this post for those building their own device.
People can try before they decide to purchase the full version with all the bells and whistles.
The demo allows those who have built their own device using stripboard/proto board or even my pcb to load a version of the software for free to check it works.
The demo has one level of assist and regen only.
Approx 6A of regen and 12A of assist.
No battery protect mode.
No ABC overide.
No max assist/regen.
No disable assist/regen.
No autocancel.
No ima cruise control.
No Lcd display.
No assist/regen boost mode.
etc etc.
The attached zip file is not password protected and may be freely distributed.
http://www.insightcentral.net/forum...s-discussion/4108d1356606413-imac-c-hch1-civic-mini_hch1_12f683_imac-c_demo.zip
Original Post.
I think you might like this
I have been studying the HCH1 data and the current OBDIIC&C schematic and I think that IMAC&C control aka 'MIMA' can be achieved for the HCH1 using only one harness wire cut / splice and a 3.5mm plug into the data logging port of the OBDIIC&C gauge.
The data port is connected to the RX/TX USUART of the pic, and with a change to two resistors R14 & R15 from 1k to 220R on the pcb (may not be reqd) I think we can achieve the comms connectivity we need to intercept and modify the IMA control signals passing from the ECM to the MCM on the serial line. OK you won't be able to do any logging initially but what the hell, that data could be diverted to J4 later. I will operate an interrupt driven buffer which passes through the serial signals and/or modifies them for IMAC&C.
The gauge will plug into the OBDII port as now and work in the same way.
Initially the button will be reconfigured to give assist/regen right/left click etc or similiar.
It might be possible later to add a second remote dedicated IMA button using the SCS line, J4 or even the Hline connection.
A lot of work to do but I hope to try a simple data pass thru connection with the gauge also working next week.
Modifying the data for IMA control will come later when I have analysed it all. It looks quite promising and means a pretty cheap solution for MIMA for HCH1 especially if you already have a gauge as you get OBDIIC&C functionality as well
Before anyone asks, no we can't do this with the G1 Insight or any other other IMA cars ASFAIK as they use different comms. Only exception might be the Accord IMA but we don't have them over here.
Just to clear up any confusion the production IMAC&C unit for the HCH1 is a standalone device seperate from the OBDIIC&C display.
The first few pages of this thread however discuss an attempt to make the OBDIIC&C device perform both functions, this did not work correctly so was abandonded in favour of the standalone device which works well.
The development of the standalone IMAC&C for the HCH1 beings at about this post
http://www.insightcentral.net/forum...orums/other-honda-hybrids-discussion/21887-imac-c-hch1-civic-26.html#post235068
I hope that helps.
PS There is some free demo code available in this post for those building their own device.
People can try before they decide to purchase the full version with all the bells and whistles.
The demo allows those who have built their own device using stripboard/proto board or even my pcb to load a version of the software for free to check it works.
The demo has one level of assist and regen only.
Approx 6A of regen and 12A of assist.
No battery protect mode.
No ABC overide.
No max assist/regen.
No disable assist/regen.
No autocancel.
No ima cruise control.
No Lcd display.
No assist/regen boost mode.
etc etc.
The attached zip file is not password protected and may be freely distributed.
http://www.insightcentral.net/forum...s-discussion/4108d1356606413-imac-c-hch1-civic-mini_hch1_12f683_imac-c_demo.zip
Original Post.
I think you might like this
I have been studying the HCH1 data and the current OBDIIC&C schematic and I think that IMAC&C control aka 'MIMA' can be achieved for the HCH1 using only one harness wire cut / splice and a 3.5mm plug into the data logging port of the OBDIIC&C gauge. The data port is connected to the RX/TX USUART of the pic, and with a change to two resistors R14 & R15 from 1k to 220R on the pcb (may not be reqd) I think we can achieve the comms connectivity we need to intercept and modify the IMA control signals passing from the ECM to the MCM on the serial line. OK you won't be able to do any logging initially but what the hell, that data could be diverted to J4 later. I will operate an interrupt driven buffer which passes through the serial signals and/or modifies them for IMAC&C.
The gauge will plug into the OBDII port as now and work in the same way.
Initially the button will be reconfigured to give assist/regen right/left click etc or similiar.
It might be possible later to add a second remote dedicated IMA button using the SCS line, J4 or even the Hline connection.
A lot of work to do but I hope to try a simple data pass thru connection with the gauge also working next week.
Modifying the data for IMA control will come later when I have analysed it all. It looks quite promising and means a pretty cheap solution for MIMA for HCH1 especially if you already have a gauge as you get OBDIIC&C functionality as well
Before anyone asks, no we can't do this with the G1 Insight or any other other IMA cars ASFAIK as they use different comms. Only exception might be the Accord IMA but we don't have them over here.
