Communication protocol between CAN and CC2540 chip. ==

List of commands from CC2540 to CAN transiver:

1. Subscribe to a message
2. Subscribe to a message with a bitmask
3. Unsubscribe from messages
4. Unsubscribe from messages with a bitmask
5. List of all subscriptions
6. Reset filter state
7. Passthrough message

enum {
  CMD_SUBSCRIBE = 1,
  CMD_SUBSCRIBE_BITMASK,
  CMD_UNSUBSCRIBE,
  CMD_UNSUBSCRIBE_BITMASK,
  CMD_LIST,
  CMD_RESET,
  CMD_MSG
} cmd_type;

Command message structure

Byte	Bitmask	Description	Values
0		Command code	1 - 7
1		Payload size	0 - 254
2 - 255		Payload

Examples

0x01:0x08:0x00:0x00:0x07:0x06:0x00:0x01:0x05:0x05

1. byte - subsribe command
2. byte - payload size 8 byte = 2 CAN message IDs * 4 byte each
3. - 10. bytes 0076h & 0155h