dali/bacnet_stack
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Added yield to lower CPU usage when no characters are arriving.

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This commit is contained in:
skarg
2011-05-10 22:00:32 +00:00
parent e85ab0b49f
commit b863996349
2 changed files with 6 additions and 3 deletions
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bacnet-stack/ports/linux/dlmstp.c
+5 -2
View File
@@ -217,6 +217,9 @@ static void *dlmstp_master_fsm_task(void *pArg)
if (MSTP_Port.ReceivedValidFrame == false && if (MSTP_Port.ReceivedValidFrame == false &&
MSTP_Port.ReceivedInvalidFrame == false) { MSTP_Port.ReceivedInvalidFrame == false) {
RS485_Check_UART_Data(&MSTP_Port); RS485_Check_UART_Data(&MSTP_Port);
if (MSTP_Port.DataAvailable == false) {
sched_yield();
}
MSTP_Receive_Frame_FSM(&MSTP_Port); MSTP_Receive_Frame_FSM(&MSTP_Port);
} }
if (MSTP_Port.ReceivedValidFrame || MSTP_Port.ReceivedInvalidFrame) { if (MSTP_Port.ReceivedValidFrame || MSTP_Port.ReceivedInvalidFrame) {
@@ -241,9 +244,9 @@ static void *dlmstp_master_fsm_task(void *pArg)
break; break;
} }
} }
if (run_master) if (run_master) {
MSTP_Master_Node_FSM(&MSTP_Port); MSTP_Master_Node_FSM(&MSTP_Port);
}
} }
return NULL; return NULL;
bacnet-stack/ports/linux/rs485.c
+1 -1
View File
@@ -258,7 +258,7 @@ void RS485_Check_UART_Data(volatile struct mstp_port_struct_t *mstp_port)
if (mstp_port->DataAvailable == false) { if (mstp_port->DataAvailable == false) {
/* check for data */ /* check for data */
pthread_mutex_lock(&Reader_Mutex); pthread_mutex_lock(&Reader_Mutex);
if (FIFO_Count(&Rx_FIFO) > 0) { if (FIFO_Count(&Rx_FIFO) > 0) {
mstp_port->DataRegister = FIFO_Get(&Rx_FIFO); mstp_port->DataRegister = FIFO_Get(&Rx_FIFO);
mstp_port->DataAvailable = true; mstp_port->DataAvailable = true;
} }