X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;ds=inline;f=firmware%2Frs485.c;h=7c9032452930f221ab4c2f0fe0d9468dcd02f459;hb=HEAD;hp=6d16a2af05840de11d0808bfe1d63c0ded2e5100;hpb=4fe29561e6b7b4c0726dceb1a46569ed43afa376;p=openparking.git

diff --git a/firmware/rs485.c b/firmware/rs485.c
old mode 100755
new mode 100644
index 6d16a2a..7c90324
--- a/firmware/rs485.c
+++ b/firmware/rs485.c
@@ -34,7 +34,6 @@ static volatile char rxbuf[BUFSIZE], txbuf[BUFSIZE];
 
 #define UART_BAUD	9600
 #define UBRR_VAL        ((F_CPU + 8UL * UART_BAUD) / (16UL*UART_BAUD) - 1)
-#define wait_one_byte()	_delay_us(10*1000000/UART_BAUD)
 
 void rs485_init()
 {
@@ -99,13 +98,19 @@ ISR(USART_RX_vect)
 	sei();
 }
 
+ISR(USART_TX_vect)
+{
+	UCSR0B &= ~_BV(TXCIE0); // disable further IRQs
+	ctl_pin_off();
+}
+
 ISR(USART_UDRE_vect)
 {
 	cli();
 	if (tx_head == tx_tail) {
+		UCSR0A |= _BV(TXC0); // clear the pending TXC flag
+		UCSR0B |= _BV(TXCIE0); // enable xmit complete irq
 		UCSR0B &= ~_BV(UDRIE0);
-		wait_one_byte();
-		ctl_pin_off();
 	} else {
 		UDR0 = txbuf[tx_tail];
 		tx_tail = bufptr_inc(tx_tail);