Jetter JVM-407B-HMI, User Manual

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7 SAE J1939 STX API
STX Function SAEJ1939Init()
Calling up the SAEJ1939Init () function initializes one of the CAN busses
(not CAN 0 as this is reserved for CANopen®) for use with the J1939 protocol.
From then on, the JVM-407B has got the SA (Source Address) assigned by
the function parameter mySA. Thus, it has got its own device address on the
bus.
Function SAEJ1939Init (
CANNo:Int,
mySA:Byte,
) :Int;
The SAEJ1939Init () function comprises the following parameters:
Parameter Description Value
CANNo CAN channel number 1 ... CANMAX
mySA Own source address 0 ... 253
This function transfers the following return values to the higher-level program.
Return value
0 OK
-1 Error when checking parameters
-3 Insufficient memory for SAE J1939
This parameter specifies the number of the SAEJ1939 interface. CANNo = 1
is assigned to the first interface. The number of SAEJ1939 interfaces depends
on the device. For information on the maximum number of SAEJ1939
interfaces (CANMAX) refer to the chapters Technical Specifications and Quick
Reference in the corresponding manual.
Initializing the CAN-Bus 1. The JVM-407B has got Node SA 20 (0x14). The
JVM-407B can now send messages with the set SA (and only these
messages).
Result := SAEJ1939Init(1, 20);
Address Claiming has not been implemented.
Introduction
Function declaration
Function parameters
Return value
Parameter CANNo
How to use this function
Address Claiming