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Working on the Datalink MS/TP layer - no working yet.

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This commit is contained in:
skarg
2006-08-14 13:59:07 +00:00
parent 0eca2b07ad
commit dafc55bf9f
4 changed files with 174 additions and 42 deletions
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bacnet-stack/dlmstp.h
+24 -6
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@@ -39,6 +39,7 @@
#include <stdint.h>
#include <stddef.h>
#include "bacdef.h"
#include "npdu.h"
/* defines specific to MS/TP */
#define MAX_HEADER (2+1+1+1+2+1+2+1)
@@ -46,7 +47,6 @@
typedef struct dlmstp_packet {
bool ready; /* true if ready to be sent or received */
bool data_expecting_reply;
BACNET_ADDRESS address; /* src or dest address */
unsigned pdu_len; /* packet length */
uint8_t pdu[MAX_MPDU]; /* packet */
@@ -61,23 +61,41 @@ extern "C" {
void dlmstp_task(void);
void dlmstp_millisecond_timer(void);
/* returns number of bytes sent on success, negative on failure */
/* returns number of bytes sent on success, negative on failure */
int dlmstp_send_pdu(BACNET_ADDRESS * dest, /* destination address */
BACNET_NPDU_DATA * npdu_data, /* network information */
uint8_t * pdu, /* any data to be sent - may be null */
unsigned pdu_len); /* number of bytes of data */
/* returns the number of octets in the PDU, or zero on failure */
/* returns the number of octets in the PDU, or zero on failure */
uint16_t dlmstp_receive(BACNET_ADDRESS * src, /* source address */
uint8_t * pdu, /* PDU data */
uint16_t max_pdu, /* amount of space available in the PDU */
unsigned timeout); /* milliseconds to wait for a packet */
/* function for MS/TP state machine to use to get a packet
to transmit. It returns the number of bytes in the
packet, or 0 if none. */
/* function for MS/TP state machine to use to get a packet
to transmit. It returns the number of bytes in the
packet, or 0 if none. */
int dlmstp_get_transmit_pdu(BACNET_ADDRESS * dest, /* destination address */
uint8_t * pdu); /* any data to be sent - may be null */
/* This parameter represents the value of the Max_Info_Frames property of */
/* the node's Device object. The value of Max_Info_Frames specifies the */
/* maximum number of information frames the node may send before it must */
/* pass the token. Max_Info_Frames may have different values on different */
/* nodes. This may be used to allocate more or less of the available link */
/* bandwidth to particular nodes. If Max_Info_Frames is not writable in a */
/* node, its value shall be 1. */
void dlmstp_set_max_info_frames(unsigned max_info_frames);
unsigned dlmstp_max_info_frames(void);
/* This parameter represents the value of the Max_Master property of the */
/* node's Device object. The value of Max_Master specifies the highest */
/* allowable address for master nodes. The value of Max_Master shall be */
/* less than or equal to 127. If Max_Master is not writable in a node, */
/* its value shall be 127. */
void dlmstp_set_max_info_frames(uint8_t max_master);
uint8_t dlmstp_max_master(void);
void dlmstp_set_my_address(uint8_t my_address);
void dlmstp_get_my_address(BACNET_ADDRESS * my_address);