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Rev. 0.1

3.6. Data Link Layer Structures

3.6.1. Frame

Typedef:

typedef U8 LINK_ATTR_MFR[LINK_ATTR_SIZE_MFR];

typedef U8 LINK_ATTR_ADDR[LINK_ATTR_SIZE_ADDR];

typedef struct DataField

{

U8 size;

U8 capacity;

U8* payload;

} DataField;

Members:

size - The number of valid bytes in the data-field

capacity - The size of the buffer pointed to by payload

payload - A pointer to a user space byte array

typedef struct Frame

{

U8 c_field;

LINK_ATTR_MFR m_field;

LINK_ATTR_ADDR a_field;

U8 ci_field;

DataField data_field;

} Frame;

Members:

c_field - The Control-field

m_field - The manufacturer ID

a_field - The Address-field

ci_field - The Control Information-field

data_field - The Data-field

3.7. Data Link Layer Service Primitive Structures

3.7.1. Request

Typedef:

typedef struct Request

{

U8 retries;

Frame frame;

} Request;

Members:

retries - The number of times to retry an acknowledged transmission if a confirm/respond is not received.

frame - The frame to transmit. The C-field is used to determine the transmission procedure

(Send/No Reply, Send/Confirm, Request/Respond). All fields must be specified when calling

MbusLinkServicesRequest().