can id´s 4 Gear Selector

[VanGogh]

I checked the code Gen1 by tom91 with a modified void setup ().

Code: Select all

void setup()
{
  Serial.begin(115200);

  if (CAN0.begin(MCP_ANY, CAN_500KBPS, MCP_16MHZ) == CAN_OK)
  {
    Serial.println("CAN Init OK");
  }
  else
  {
    Serial.println("CAN Init Failed");
  }
  CAN0.setMode(MCP_NORMAL);
  pinMode(CAN0_INT, INPUT);
}

Now everything works great. The first module (silver) performs all functions. The second module (black) does not unlock, I think the problem is in the solenoid. The question about the brake pedal remained open.

[LRBen]

Now the knob rotates freely. But in the car, it is locked and only when the brake pedal is pressed does the knob unlock. How to implement it? What data needs to be sent to the CAN bus?

Wouldn't be too hard to implement. We know what canbus is used to lock or unlock the knob, you could run the brake light voltage through a relay (So you don't send 12v into an arduino pin)to act as a signal for the arduino. When the brake light is on, send the canbus messages to unlock.

[VanGogh]

Hello. If anyone needs a modified GEN1 code to connect the relay to the module buttons. Also added module highlighting. But I can’t find what data I need to send to the Can bus to block the knob in the P and R positions. And how to track when the ignition is off and the knob is down (I need this to restart the arduino)?

[VanGogh]

When the brake light is on, send the canbus messages to unlock.

What message exactly unlocks and locks the knob? And what message does the knob drop down?

[LRBen]

What message exactly unlocks and locks the knob? And what message does the knob drop down?

On Gen 1 I think just switching off ignition 12v will lower the knob. You should be able to lock it by just not sending any canbus messages.

Afraid it's been a while since I looked at this so I can't remember much. But all the information is on this thread. Experiment with it for the details.

[VanGogh]

Do you think the voltage on the start/stop button and the handbrake depends on the CAN bus signal or not? I apply 12V to pin 12 (Wake up). And on pins 7, 18 and 11-ground (start/stop) I get 0V. But according to GSMTSM - Pinout.pdf they must be under voltage. The same situation with manual brake, on pins 8,9,10,19,20 I get 0V. Maybe I need to send some kind of message to the can bus and wake up these outputs? Or these contacts work on the Lin bus

[nkiernan]

Do you think the voltage on the start/stop button and the handbrake depends on the CAN bus signal or not?

Did you check if the start button for example simply closes a switch, so continuity between ground and start_stop_1 when button is pressed?

[VanGogh]

This is not a simple switch. There is a resistor between the buttons and ground. When the button is pressed, there is no short circuit between ground and start_stop_1 or _2. The tracks from the buttons go inside the board and there is no way to track them

[connor016]

Great info here! I was able to get one working with an UNO and CAN shield with tom91's code for gen 2. It appears to all work without crashing except the sport mode does not engage. Below is a photo of the model for reference if anyone is looking for one:

I will try LRBen's code when I get a DUE. Note with the code above, you need to make the following changes as others noted that I missed initially (likely due to a newer library for mcp_can):
1) Add MCP_ANY in the setup loop:
while (CAN_OK != CAN0.begin(MCP_ANY, CAN_500KBPS, MCP_16MHZ)) // init can bus : baudrate = 500k 8MHZ crystal
2) Add the following line at the end of the setup loop:
CAN0.setMode(MCP_NORMAL); // Change to normal mode to allow messages to be transmitted

[VanGogh]

Hello. I looked at the logs from tom91 for Gen1. I don't understand. How does ID 312 turn 0x20 (locked) into 0x10 (unlock)? What command blocks the knob? If you look at Gen2 ID 02C there are two command 0x00 and 0x40 (D3). But they don't work for Gun1