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Added MSTP Slave Node option to stm32f10x port (#467)

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Co-authored-by: Steve Karg <skarg@users.sourceforge.net>
This commit is contained in:
Steve Karg
2023-08-07 09:45:30 -05:00
committed by GitHub
parent acb3b0f57d
commit 2b35883df6
1 changed files with 74 additions and 3 deletions
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ports/stm32f10x/dlmstp.c
+71
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@@ -731,6 +731,73 @@ static void MSTP_Receive_Frame_FSM(void)
return;
}
static void MSTP_Slave_Node_FSM(void)
{
/* destination address */
uint8_t destination;
/* source address */
uint8_t source;
/* any data to be sent - may be null */
uint8_t *data;
/* amount of data to be sent - may be 0 */
uint16_t data_len;
/* packet from the PDU Queue */
struct dlmstp_packet *pkt;
if (MSTP_Flag.ReceivedInvalidFrame) {
/* ReceivedInvalidFrame */
/* invalid frame was received */
MSTP_Flag.ReceivedInvalidFrame = false;
} else if (MSTP_Flag.ReceivedValidFrame) {
switch (FrameType) {
case FRAME_TYPE_BACNET_DATA_EXPECTING_REPLY:
if (DestinationAddress != MSTP_BROADCAST_ADDRESS) {
/* The ANSWER_DATA_REQUEST state is entered when a */
/* BACnet Data Expecting Reply, a Test_Request, or */
/* a proprietary frame that expects a reply is received. */
pkt = (struct dlmstp_packet *)Ringbuf_Peek(&PDU_Queue);
if (pkt != NULL) {
MSTP_Send_Frame(pkt->frame_type, pkt->address.mac[0],
This_Station, (uint8_t *)&pkt->pdu[0],
pkt->pdu_len);
Master_State = MSTP_MASTER_STATE_IDLE;
/* clear our flag we were holding for comparison */
MSTP_Flag.ReceivedValidFrame = false;
/* clear the queue */
(void)Ringbuf_Pop(&PDU_Queue, NULL);
} else if (rs485_silence_elapsed(Treply_delay)) {
/* If no reply will be available from the higher layers
within Treply_delay after the reception of the final
octet of the requesting frame (the mechanism used
to determine this is a local matter), then no reply
is possible. */
MSTP_Flag.ReceivedValidFrame = false;
}
} else {
/* no reply when addressed as Broadcast */
MSTP_Flag.ReceivedValidFrame = false;
}
break;
case FRAME_TYPE_TEST_REQUEST:
MSTP_Flag.ReceivedValidFrame = false;
destination = SourceAddress;
source = This_Station;
data = &InputBuffer[0];
data_len = DataLength;
MSTP_Send_Frame(FRAME_TYPE_TEST_RESPONSE, destination, source,
data, data_len);
break;
case FRAME_TYPE_TOKEN:
case FRAME_TYPE_POLL_FOR_MASTER:
case FRAME_TYPE_TEST_RESPONSE:
case FRAME_TYPE_BACNET_DATA_NOT_EXPECTING_REPLY:
default:
MSTP_Flag.ReceivedValidFrame = false;
break;
}
}
}
/* returns true if we need to transition immediately */
static bool MSTP_Master_Node_FSM(void)
{
@@ -1566,11 +1633,15 @@ uint16_t dlmstp_receive(BACNET_ADDRESS *src, /* source address */
This_Station = 255;
}
} else {
if ((This_Station > 127) && (This_Station < 255)) {
MSTP_Slave_Node_FSM();
} else if (This_Station <= 127) {
while (MSTP_Master_Node_FSM()) {
/* do nothing while some states fast transition */
};
}
}
}
if (This_Station != 255) {
/* if there is a packet that needs processed, do it now. */
if (MSTP_Flag.ReceivePacketPending) {