openinverter forum

kevpatts wrote: ↑Sat Aug 28, 2021 12:42 am Is it even showing up on Windows as a COM port?

Jack Bauer wrote: ↑Mon Aug 30, 2021 5:20 pm Only idea I would have is to short the erase pins, apply power and unshort pins. That will casue the sam-ba loader to start and should then appear as an arduino due native port. Measure your 5v and 3v3 rails and post results. Also, please remember folks I can't respond to pms and emails asking questions especially right now.

PatrcioEV-ATX wrote: ↑Thu Aug 26, 2021 7:47 pm Since my car doesn't have a CAN network, I'm using the other CAN on the VCU to send a custom message to include MPH (I've added that calc into my VCU software), Sensor.Voltage, Sensor.Amperes, Sensor.KW and mg2_speed. That info is received by a CAN Bus shield and sending it to an Arduino that is then serial and display printing the values.

Everything is working fine, but for some reason mg2speed just does not come through correctly. It's not at all accurate and jumps all over the place. The VCU sends it correctly to the webpage, and my MPH calc is steady and accurate. Any thoughts as to why it won't send over CAN correctly? From what I can tell from Damien's V7, he is using just the value of mg2_speed (other than some logic specific to his BMW).

here is my CAN message void:

void Frames10MS()
{
if(timer_Frames10.check())
{
digitalWrite(13,!digitalRead(13));

tach=(abs(mg2_speed));
outframe.id = 0x001; //display data message
outframe.length = 5; //data payload 5 bytes
outframe.extended = 0; //standard id
outframe.rtr = 1; //no request
outframe.data.bytes[0]=MPH;
outframe.data.bytes[1]=Sensor.Voltage;
outframe.data.bytes[2]=Sensor.Amperes;
outframe.data.bytes[3]=Sensor.KW;
outframe.data.bytes[4]=tach;
Can0.sendFrame(outframe);
}
}

If anyone is interested, this is my void for MPH:

float speedCalc;
int tireRpm=792;
int MPH;
float diff=3.31;
int tach;

void Calc_MPH()
{
speedCalc=((abs(mg2_speed/1.9))/diff);
MPH=((speedCalc*60)/tireRpm);
}

steveknox wrote: ↑Tue Sep 21, 2021 12:38 pmI for one will be just biting the bullet and using the zombieverter when the time comes to upgrade.

Jackk wrote: ↑Mon Sep 20, 2021 8:47 pm Hi guys,

Been a while but had a go at bench testing my gs450h with the latest simple serial interface code. All works well.

Moving forward with the project im struggling to find info on flashing the new zombieverter code to my gs450h V2. Would this be doable yet?

From a non coder getting the older firmware to run may be challenging. I would like the VCU to control pre charge and display current and voltage (I have a isa shunt). Which is the best code to go for there seems to be quite a few and I'm getting confused!

Jack

celeron55 wrote: ↑Sat Sep 11, 2021 3:09 am

PatrcioEV-ATX wrote: ↑Thu Aug 26, 2021 7:47 pm Since my car doesn't have a CAN network, I'm using the other CAN on the VCU to send a custom message to include MPH (I've added that calc into my VCU software), Sensor.Voltage, Sensor.Amperes, Sensor.KW and mg2_speed. That info is received by a CAN Bus shield and sending it to an Arduino that is then serial and display printing the values.

Everything is working fine, but for some reason mg2speed just does not come through correctly. It's not at all accurate and jumps all over the place. The VCU sends it correctly to the webpage, and my MPH calc is steady and accurate. Any thoughts as to why it won't send over CAN correctly? From what I can tell from Damien's V7, he is using just the value of mg2_speed (other than some logic specific to his BMW).
.....

void Calc_MPH()
{
speedCalc=((abs(mg2_speed/1.9))/diff);
MPH=((speedCalc*60)/tireRpm);
}

mg2_speed is a larger value than what can fit into 8 bits. To keep it simple, just divide it by 100 or 50 when putting it into the message and multiply when receiving.

But you could split it into a low and high byte and go from there if you'd like to have all the resolution. Arduino has the lowByte and highByte functions for this, and for reconstructing the value on the receiving end, you can use word(highbytevariable, lowbytevariable).

steveknox wrote: ↑Sat Sep 25, 2021 2:32 pm He VCU has got drive and reverse, and it's sending the correct torque commands on htm. I was wondering if the P connection to the inverter connection is required

steveknox wrote: ↑Mon Oct 04, 2021 9:57 am Ah wait, does the Park / Neutral Position SW need to have power in order to actuate the gear solenoids, specifically to +B.
I have that connector currently disconnected as I'm not using the signals from it to identify drive / neutral / reverse.
Would that explain why MG2 is spinning without moving the shaft?