+/* TX and RX buffers */
+static unsigned char uart0_txbuffer[CONFIG_UART0_TXBUFSIZE];
+static unsigned char uart0_rxbuffer[CONFIG_UART0_RXBUFSIZE];
+#if AVR_HAS_UART1
+ static unsigned char uart1_txbuffer[CONFIG_UART1_TXBUFSIZE];
+ static unsigned char uart1_rxbuffer[CONFIG_UART1_RXBUFSIZE];
+#endif
+static unsigned char spi_txbuffer[CONFIG_SPI_TXBUFSIZE];
+static unsigned char spi_rxbuffer[CONFIG_SPI_RXBUFSIZE];
+