X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Favr%2Fao_spi_usart.c;h=7c41042a4424026e99b0ea821c618a7b750298fe;hb=bc3610d8cecbfed40c62d4dcb93fc9a4d2a7c9e3;hp=1996fcd9e98a9cee798aaaf3ace662c2b623924a;hpb=06b044629951b06c7ec9b0105b89f51b2880ebd0;p=fw%2Faltos

diff --git a/src/avr/ao_spi_usart.c b/src/avr/ao_spi_usart.c
index 1996fcd9..7c41042a 100644
--- a/src/avr/ao_spi_usart.c
+++ b/src/avr/ao_spi_usart.c
@@ -29,7 +29,7 @@ __xdata uint8_t	ao_spi_mutex;
  * so using interrupts would take way too long
  */
 void
-ao_spi_send(void __xdata *block, uint16_t len) __reentrant
+ao_spi_send_bus(void __xdata *block, uint16_t len) __reentrant
 {
 	uint8_t	*d = block;
 
@@ -43,15 +43,17 @@ ao_spi_send(void __xdata *block, uint16_t len) __reentrant
 
 /* Receive bytes over SPI.
  *
- * This sets up tow DMA engines, one reading the data and another
- * writing constant values to the SPI transmitter as that is what
- * clocks the data coming in.
+ * Poll, sending zeros and reading data back
  */
 void
-ao_spi_recv(void __xdata *block, uint16_t len) __reentrant
+ao_spi_recv_bus(void __xdata *block, uint16_t len) __reentrant
 {
 	uint8_t	*d = block;
 
+	/* Clear any pending data */
+	while (UCSR1A & (1 << RXC1))
+		(void) UDR1;
+	
 	while (len--) {
 		while (!(UCSR1A & (1 << UDRE1)));
 		UDR1 = 0;