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[avr] link the RS485 driver/receiver enable line to TXCIE0

This commit is contained in:
Bart Van Der Meerssche 2011-05-10 16:19:32 +02:00
parent 346e22a0ae
commit 90b129a67a
1 changed files with 15 additions and 2 deletions
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17
mote/v2/avr/uart.c
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@ -238,7 +238,7 @@ u08 uartSendBuffer(char *buffer, u16 nBytes)
} }
} }
*/ */
// UART Transmit Complete Interrupt Handler // UART Data Register Empty Interrupt Handler
UART_INTERRUPT_HANDLER(SIG_UART_DATA) UART_INTERRUPT_HANDLER(SIG_UART_DATA)
{ {
// check if buffered tx is enabled // check if buffered tx is enabled
@ -247,6 +247,8 @@ UART_INTERRUPT_HANDLER(SIG_UART_DATA)
// check if there's data left in the buffer // check if there's data left in the buffer
if(uartTxBuffer.datalength) if(uartTxBuffer.datalength)
{ {
// set RS-485 into transmit mode
PORTD |= (1<<PD5);
// send byte from top of buffer // send byte from top of buffer
outb(UDR, bufferGetFromFront(&uartTxBuffer)); outb(UDR, bufferGetFromFront(&uartTxBuffer));
} }
@ -256,8 +258,10 @@ UART_INTERRUPT_HANDLER(SIG_UART_DATA)
uartBufferedTx = FALSE; uartBufferedTx = FALSE;
// return to ready state // return to ready state
uartReadyTx = TRUE; uartReadyTx = TRUE;
// disable TXCIE0 interrupt // disable UDRIE0 interrupt
UCR &= ~(1<<UDRIE0); UCR &= ~(1<<UDRIE0);
// enable TXCIE0 interrupt
UCR |= (1<<TXCIE0);
} }
} }
else else
@ -268,6 +272,15 @@ UART_INTERRUPT_HANDLER(SIG_UART_DATA)
} }
} }
// UART Transmit Complete Interrupt Handler
UART_INTERRUPT_HANDLER(SIG_UART_TRANS)
{
// set RS-485 into receive mode
PORTD &= ~(1<<PD5);
// disable TXCIE0 interrupt
UCR &= ~(1<<TXCIE0);
}
// UART Receive Complete Interrupt Handler // UART Receive Complete Interrupt Handler
UART_INTERRUPT_HANDLER(SIG_UART_RECV) UART_INTERRUPT_HANDLER(SIG_UART_RECV)
{ {