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-rw-r--r--include/spi.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/spi.h b/include/spi.h
index 3fe2e1e..1638b50 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -37,11 +37,16 @@
#define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */
#define SPI_3WIRE 0x10 /* SI/SO signals shared */
#define SPI_LOOP 0x20 /* loopback mode */
+#define SPI_SLAVE 0x40 /* slave mode */
+#define SPI_PREAMBLE 0x80 /* Skip preamble bytes */
/* SPI transfer flags */
#define SPI_XFER_BEGIN 0x01 /* Assert CS before transfer */
#define SPI_XFER_END 0x02 /* Deassert CS after transfer */
+/* Header byte that marks the start of the message */
+#define SPI_PREAMBLE_END_BYTE 0xec
+
/*-----------------------------------------------------------------------
* Representation of a SPI slave, i.e. what we're communicating with.
*