X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Favr%2Fao_spi_usart.c;h=5ea11da6a093527a6ae96cb4caa0f8cd5ccdcaed;hp=6ed708ff38faf9d09e3eb44ff13ee33aea3bc5ee;hb=refs%2Ftags%2F1.0.9.3;hpb=f6f54d70b768dca1715ddddea64a4df00d82b09e

diff --git a/src/avr/ao_spi_usart.c b/src/avr/ao_spi_usart.c
index 6ed708ff..5ea11da6 100644
--- a/src/avr/ao_spi_usart.c
+++ b/src/avr/ao_spi_usart.c
@@ -33,35 +33,33 @@ ao_spi_send(void __xdata *block, uint16_t len) __reentrant
 {
 	uint8_t	*d = block;
 
-	ao_mutex_get(&ao_spi_mutex);
 	while (len--) {
 		while (!(UCSR1A & (1 << UDRE1)));
 		UDR1 = *d++;
 		while (!(UCSR1A & (1 << RXC1)));
 		(void) UDR1;
 	}
-	ao_mutex_put(&ao_spi_mutex);
 }
 
 /* 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
 {
 	uint8_t	*d = block;
 
-	ao_mutex_get(&ao_spi_mutex);
+	/* Clear any pending data */
+	while (UCSR1A & (1 << RXC1))
+		(void) UDR1;
+	
 	while (len--) {
 		while (!(UCSR1A & (1 << UDRE1)));
 		UDR1 = 0;
 		while (!(UCSR1A & (1 << RXC1)));
 		*d++ = UDR1;
 	}
-	ao_mutex_put(&ao_spi_mutex);
 }
 
 /*