stcm_iso157652_txmessage-structure.md

stCM_ISO157652_TxMessage Structure

This structure is used by icsneoISO15765_TransmitMessage

{% tabs %} {% tab title="C/C++ Declare" %}

typedef struct __declspec(align(2)) _stCM_ISO157652_TxMessage
{
    unsigned short vs_netid; 
    unsigned char padding; 
    unsigned char reserved2;
    unsigned int id; 
    unsigned int fc_id; 
    unsigned int fc_id_mask; 
    unsigned char stMin;
    unsigned char blockSize;
    unsigned char flowControlExtendedAddress; 
    unsigned char extendedAddress; 

    unsigned short fs_timeout; 
    unsigned short fs_wait; 
   
    unsigned char data[4*1024]; 
    unsigned int num_bytes;
    union
    { 
        struct
        {
            unsigned id_29_bit_enable:1; 
            unsigned fc_id_29_bit_enable:1; 
            unsigned ext_address_enable:1; 
            unsigned fc_ext_address_enable:1; 
            unsigned overrideSTmin:1;
            unsigned overrideBlockSize:1;
            unsigned paddingEnable:1;
            unsigned iscanFD : 1;
            unsigned isBRSEnabled : 1;        };
    unsigned short flags;
};

{% endtab %}

{% tab title="Visual Basic .NET Declare 1" %}

<StructLayout(LayoutKind.Sequential, Pack:=2)> Public Structure stCM_ISO157652_TxMessage
    Dim vs_netid As UInt16
    Dim padding As Byte
    Dim reserved2 As Byte
    Dim id As UInt32
    Dim fc_id As UInt32
    Dim fc_id_mask As UInt32
    Dim stMin As Byte
    Dim blockSize As Byte
    Dim flowControlExtendedAddress As Byte 
    Dim extendedAddress As Byte
    '//flow control timeouts
    Dim fs_timeout As UInt16
    Dim fs_wait As UInt16
    '//******************************************************************************************************************
    <VBFixedArray(4095), System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.ByValArray, SizeConst:=4095)> Public data() As Byte
    '// call: stCM_ISO157652_TxMessage.data = New Byte(4096) {}
    '//******************************************************************************************************************
    Dim num_bytes As UInt32
    Dim flags As UInt16
End Structure

{% endtab %}

{% tab title="Visual Basic .NET Declare 2" %}

Enum stCM_ISO157652_TxMessage_Flags
    id_29_bit_enable = 1 
    fc_id_29_bit_enable = 2 
    ext_address_enable = 4 
    fc_ext_address_enable = 8 
    overrideSTmin = 16 
    overrideBlockSize = 32 
    paddingEnable = 64 
    iscanFD = 128 
    isBRSEnabled= 256
End Enum

{% endtab %}

{% tab title="C# Declare 1" %}

[StructLayout(LayoutKind.Sequential, Pack = 2)]
public struct {
    public UInt16 vs_netid;
    public byte padding;
    public bytete reserved2;
    public id;
    public UInt32 fc_id; 
    public UInt3232
    public bytete
    public byte blockSize;
    public bytete
    public bytete
    public UInt16 fs_timeout;
    public UInt16 fs_wait; 
    //******************************************************************************************************************
    [MarshalAs(>(UnmanagedType.ByValArray,SizeConst=4095)] public byte[] data;
    // call: stCM_ISO157652_TxMessage.data = new byte(4096)
    //******************************************************************************************************************
    public num_bytes;
    public UInt16 flags;
}

{% endtab %}

{% tab title="C# Declare 2" %}

public enum stCM_ISO157652_TxMessage_Flags : int
{
    id_29_bit_enable = 1,
    fc_id_29_bit_enable = 2, 
    ext_address_enable = 4, 
    fc_ext_address_enable = 8, 
    overrideSTmin = 16, 
    overrideBlockSize = 32, 
    paddingEnable = 64, 
    iscanFD = 128,
    isBRSEnabled= 256,
}

{% endtab %} {% endtabs %}

Remarks

Structure Elements

Item	Description
unsigned short vs_netID	Network ID of the message
unsigned char padding	Character used for padding to fill the rest of the last frame.
unsigned char reserved2	Reserved set to 0
unsigned int id	ArbID of the message being sent
unsigned int fc_id	ArbID of the flow control frame to look for
unsigned int fc_id_mask	Bitwise mask for the flow control arbitration ID. (1 pass 0 block)
unsigned char stMin	Separation time to wait between consecutive frames
unsigned char blockSize	Number of consecutive frames before expecting another flow control
unsigned char flowControlExtendedAddress	Byte used expected for flow control extended address when using extended addressing (different than 29bit IDs)
unsigned char extendedAddress	Byte used for extended address in transmitted message
unsigned short fs_timeout	Timeout to wait for flow control frame
unsigned short fs_wait	Timeout to wait for 7F 78 (Negative response of request received response pending
unsigned char [4096]	Data array of 4096 that contains the data to send
unsigned int num_bytes	Number of data bytes used in the data array
unsigned short flags	Bit field containing flags for transaction id_29_bit_enable Enable 29 Bit address 1 fc_id_29_bit_enable Flow control 29 bit address 2 ext_address_enable Use extended address 4 fc_extended_address_enable Flow Control use extended address 8 overrideSTmin Ignore ST Min in flow control 16 overrideBlockSize Ignore block size in flow control 32 paddingenable Pad outgoing frames 64 iscanFD Enables CAN FD 128 isBRSEnabled Enables CAN FD Baud Rate Switch 256
id_29_bit_enable	Enable 29 Bit	address 1
fc_id_29_bit_enable	Flow control 29 bit address	2
ext_address_enable	Use extended address	4
fc_extended_address_enable	Flow Control use extended address	8
overrideSTmin	Ignore ST Min in flow control	16
overrideBlockSize	Ignore block size in flow control	32
paddingenable	Pad outgoing frames	64
iscanFD	Enables CAN FD	128
isBRSEnabled	Enables CAN FD Baud Rate Switch	256