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Feature/mstp zero config option (#564)

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* Added a MS/TP zero-config (automatically choose an unused MAC address) using an algorithm that starts with MAC=64 and waits for a random number of PFM (minimum of 8 plus modulo 64) before attempting to choose a MAC sequentially from 64..127. The confirmation uses a 128-bit UUID with the MSTP Test Request frame. The modifications are in src/bacnet/datalink/mstp.c and src/bacnet/datalink/dlmstp.c modules enabling any device to use zero-config if enabled. A working demonstration is in the ports/stm32f4xx for the NUCLEO board. Complete unit testing is included.  Options include lurking forever (wait for a router or another master node before joining) or lurking for a minimum time (enables self forming automatic MAC addressing device nodes).
This commit is contained in:
Steve Karg
2024-02-02 11:18:20 -06:00
committed by GitHub
parent 8f576461a8
commit 1f591db6e7
26 changed files with 2138 additions and 599 deletions
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ports/win32/dlmstp.c
+7 -5
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@@ -51,7 +51,7 @@ static HANDLE Receive_Packet_Flag;
HANDLE Received_Frame_Flag;
static DLMSTP_PACKET Transmit_Packet;
/* local MS/TP port data - shared with RS-485 */
volatile struct mstp_port_struct_t MSTP_Port;
struct mstp_port_struct_t MSTP_Port;
/* buffers needed by mstp port struct */
static uint8_t TxBuffer[DLMSTP_MPDU_MAX];
static uint8_t RxBuffer[DLMSTP_MPDU_MAX];
@@ -71,11 +71,13 @@ static struct mstimer Silence_Timer;
/* Timer that indicates line silence - and functions */
static uint32_t Timer_Silence(void *pArg)
{
(void)pArg;
return mstimer_elapsed(&Silence_Timer);
}
static void Timer_Silence_Reset(void *pArg)
{
(void)pArg;
mstimer_set(&Silence_Timer, 0);
}
@@ -226,7 +228,7 @@ void dlmstp_fill_bacnet_address(BACNET_ADDRESS *src, uint8_t mstp_address)
}
/* for the MS/TP state machine to use for putting received data */
uint16_t MSTP_Put_Receive(volatile struct mstp_port_struct_t *mstp_port)
uint16_t MSTP_Put_Receive(struct mstp_port_struct_t *mstp_port)
{
uint16_t pdu_len = 0;
BOOL rc;
@@ -252,7 +254,7 @@ uint16_t MSTP_Put_Receive(volatile struct mstp_port_struct_t *mstp_port)
/* for the MS/TP state machine to use for getting data to send */
/* Return: amount of PDU data */
uint16_t MSTP_Get_Send(
volatile struct mstp_port_struct_t *mstp_port, unsigned timeout)
struct mstp_port_struct_t *mstp_port, unsigned timeout)
{ /* milliseconds to wait for a packet */
uint16_t pdu_len = 0;
uint8_t destination = 0; /* destination address */
@@ -288,7 +290,7 @@ uint16_t MSTP_Get_Send(
* @param nbytes - number of bytes of data to send
*/
void MSTP_Send_Frame(
volatile struct mstp_port_struct_t *mstp_port,
struct mstp_port_struct_t *mstp_port,
uint8_t * buffer,
uint16_t nbytes)
{
@@ -405,7 +407,7 @@ static bool dlmstp_compare_data_expecting_reply(uint8_t *request_pdu,
/* Get the reply to a DATA_EXPECTING_REPLY frame, or nothing */
uint16_t MSTP_Get_Reply(
volatile struct mstp_port_struct_t *mstp_port, unsigned timeout)
struct mstp_port_struct_t *mstp_port, unsigned timeout)
{ /* milliseconds to wait for a packet */
uint16_t pdu_len = 0; /* return value */
uint8_t destination = 0; /* destination address */