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working on PIC port of MS/TP.

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This commit is contained in:
skarg
2006-08-11 20:55:48 +00:00
parent e683d06998
commit 185d02a9ff
2 changed files with 35 additions and 29 deletions
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bacnet-stack/dlmstp.h
+5 -3
View File
@@ -46,9 +46,11 @@
typedef struct dlmstp_packet
{
BACNET_ADDRESS address;
unsigned pdu_len;
uint8_t pdu[MAX_MPDU];
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 */
} DLMSTP_PACKET;
#ifdef __cplusplus
bacnet-stack/ports/pic18/dlmstp.c
+30 -26
View File
@@ -29,30 +29,24 @@
#include "bacdef.h"
#include "mstp.h"
#include "dlmstp.h"
#include "ringbuf.h"
#include "rs485.h"
#define RB_PACKET_COUNT 2
#define RB_PACKET_SIZE sizeof(DLMSTP_PACKET)
static RING_BUFFER Receive_Buffer;
static char Receive_Data_Store[RB_PACKET_COUNT * RB_PACKET_SIZE];
static RING_BUFFER Transmit_Buffer;
static char Transmit_Data_Store[RB_PACKET_COUNT * RB_PACKET_SIZE];
static DLMSTP_PACKET Receive_Buffer;
static DLMSTP_PACKET Transmit_Buffer;
volatile struct mstp_port_struct_t MSTP_Port; /* port data */
static uint8_t MSTP_MAC_Address = 0x05; /* local MAC address */
DLMSTP_PACKET Temp_Packet;
void dlmstp_init(void)
{
Ringbuf_Init(&Receive_Buffer,
&Receive_Data_Store[0],
RB_PACKET_SIZE,
RB_PACKET_COUNT);
Ringbuf_Init(&Transmit_Buffer,
&Transmit_Data_Store[0],
RB_PACKET_SIZE,
RB_PACKET_COUNT);
/* initialize buffer */
Receive_Buffer.ready = false;
Receive_Buffer.data_expecting_reply = false;
Receive_Buffer.pdu_len = 0;
/* initialize buffer */
Transmit_Buffer.ready = false;
Transmit_Buffer.data_expecting_reply = false;
Transmit_Buffer.pdu_len = 0;
/* initialize hardware */
RS485_Initialize();
MSTP_Init(&MSTP_Port, MSTP_MAC_Address);
}
@@ -62,7 +56,7 @@ void dlmstp_cleanup(void)
/* nothing to do for static buffers */
}
/* returns number of bytes sent on success, negative on failure */
/* returns number of bytes sent on success, zero on failure */
int dlmstp_send_pdu(BACNET_ADDRESS * dest, /* destination address */
uint8_t * pdu, /* any data to be sent - may be null */
unsigned pdu_len)
@@ -70,18 +64,24 @@ int dlmstp_send_pdu(BACNET_ADDRESS * dest, /* destination address */
bool status;
int bytes_sent = 0;
memmove(&Temp_Packet.address,dest,sizeof(Temp_Packet.address));
Temp_Packet.pdu_len = pdu_len;
memmove(Temp_Packet.pdu,pdu,sizeof(Temp_Packet.pdu));
status = Ringbuf_Put(&Transmit_Buffer, &Temp_Packet);
if (status)
if (Transmit_Buffer.ready == false)
{
/* FIXME: how do we get data_expecting_reply? */
Transmit_Buffer.data_expecting_reply = false;
Receive_Buffer.pdu_len = 0;
memmove(&Transmit_Buffer.address,dest,sizeof(Transmit_Buffer.address));
Transmit_Buffer.pdu_len = pdu_len;
/* FIXME: copy the whole PDU or just the pdu_len? */
memmove(Transmit_Buffer.pdu,pdu,sizeof(Transmit_Buffer.pdu));
bytes_sent = pdu_len;
Transmit_Buffer.ready = true;
}
return bytes_sent;
}
/* function for MS/TP to use to get a packet to transmit
returns the number of bytes in the packet, or 0 if none. */
returns the number of bytes in the packet, or zero if none. */
int dlmstp_get_transmit_pdu(BACNET_ADDRESS * dest, /* destination address */
uint8_t * pdu) /* any data to be sent - may be null */
{
@@ -89,9 +89,8 @@ int dlmstp_get_transmit_pdu(BACNET_ADDRESS * dest, /* destination address *
DLMSTP_PACKET *packet;
unsigned pdu_len = 0;
if (!Ringbuf_Empty(&Transmit_Buffer))
if (Transmit_Buffer.ready)
{
packet = Ringbuf_Pop_Front(&Transmit_Buffer);
memmove(dest,&packet->address,sizeof(packet->address));
pdu_len = packet->pdu_len;
memmove(pdu,packet->pdu,sizeof(packet.pdu));
@@ -100,6 +99,11 @@ int dlmstp_get_transmit_pdu(BACNET_ADDRESS * dest, /* destination address *
return pdu_len;
}
int dlmstp_set_transmit_pdu_ready(bool ready)
{
Transmit_Buffer.ready = ready;
}
void dlmstp_task(void)
{
RS485_Check_UART_Data(&MSTP_Port);