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Updated PIC18 port.

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This commit is contained in:
skarg
2006-09-01 18:02:44 +00:00
parent 55441280e4
commit 0e58e76090
7 changed files with 93 additions and 86 deletions
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bacnet-stack/ports/pic18/rs485.c
+33 -31
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@@ -79,6 +79,37 @@ volatile static enum {
RS485_STATE_TX_TEST = 14
} RS485_State;
/****************************************************************************
* DESCRIPTION: Processes the RS485 message to be sent
* RETURN: none
* ALGORITHM: none
* NOTES: none
*****************************************************************************/
void RS485_Process_Tx_Message(void)
{
if (RS485_Flags.TransmitComplete)
RS485_Flags.TransmitComplete = FALSE;
/* start a new transmisstion if we are ready */
if (RS485_Flags.TransmitStart && (RS485_State == RS485_STATE_IDLE)) {
/* Disable the receiver */
USART_RX_INT_DISABLE();
USART_CONTINUOUS_RX_DISABLE();
/* Enable the transmit line driver and interrupts */
RS485_TRANSMIT_ENABLE();
RS485_State = RS485_STATE_TX_DATA;
/* Configure the ISR handler for an outgoing message */
RS485_Tx_Index = 0;
/* update the flags for beginning a send */
RS485_Flags.TransmitComplete = FALSE;
RS485_Flags.TransmitStart = FALSE;
/* send the first byte */
USART_TRANSMIT(RS485_Tx_Buffer[0]);
USART_TX_SETUP();
}
return;
}
/****************************************************************************
* DESCRIPTION: Transmits a frame using the UART
* RETURN: none
@@ -119,6 +150,7 @@ void RS485_Send_Frame(volatile struct mstp_port_struct_t *mstp_port, /* port
}
/* signal the task to start sending when it is ready */
RS485_Flags.TransmitStart = TRUE;
mstp_port->SilenceTimer = 0;
return;
}
@@ -140,6 +172,7 @@ void RS485_Transmit_Interrupt(void)
data = RS485_Tx_Buffer[RS485_Tx_Index];
USART_TRANSMIT(data);
MSTP_Port.SilenceTimer = 0;
} else {
/* wait until the last bit is sent */
while (!USART_TX_EMPTY());
@@ -176,37 +209,6 @@ void RS485_Transmit_Interrupt(void)
return;
}
/****************************************************************************
* DESCRIPTION: Processes the RS485 message to be sent
* RETURN: none
* ALGORITHM: none
* NOTES: none
*****************************************************************************/
void RS485_Process_Tx_Message(void)
{
if (RS485_Flags.TransmitComplete)
RS485_Flags.TransmitComplete = FALSE;
/* start a new transmisstion if we are ready */
if (RS485_Flags.TransmitStart && (RS485_State == RS485_STATE_IDLE)) {
/* Disable the receiver */
USART_RX_INT_DISABLE();
USART_CONTINUOUS_RX_DISABLE();
/* Enable the transmit line driver and interrupts */
RS485_TRANSMIT_ENABLE();
RS485_State = RS485_STATE_TX_DATA;
/* Configure the ISR handler for an outgoing message */
RS485_Tx_Index = 0;
/* update the flags for beginning a send */
RS485_Flags.TransmitComplete = FALSE;
RS485_Flags.TransmitStart = FALSE;
/* send the first byte */
USART_TRANSMIT(RS485_Tx_Buffer[0]);
USART_TX_SETUP();
}
return;
}
/****************************************************************************
* DESCRIPTION: Returns the value of Transmit Complete flag.
* RETURN: none