add initial puzzle bus specification

1 files changed, 12 insertions, 5 deletions

diff --git a/shared/puzbus.h b/shared/puzbus.h
index 59a8867..685fd6c 100644
--- a/shared/puzbus.h
+++ b/shared/puzbus.h
@@ -26,14 +26,21 @@
 enum pb_cmd {
 	PB_CMD_READ,   //!< read a puzzle module property
 	PB_CMD_WRITE,  //!< write to a puzzle module property
+	PB_CMD_EXCHANGE, //!< state exchange command
 	// PB_CMD_UPDATE, //!< request an update
+	PB_CMD_MAGIC = 0x69, //!< magic message
 };
+typedef enum pb_cmd pb_cmd_t;
+
+static const char pb_magic_msg[] = { 0x70, 0x75, 0x7a, 0x62, 0x75, 0x73 };
+static const char pb_magic_res[] = { 0x67, 0x61, 0x6d, 0x69, 0x6e, 0x67 };
 
 /** \brief Puzzle bus global states */
-enum pb_global_state {
-	PB_GS_NOINIT,  //!< uninitialized (only used by puzzle modules)
-	PB_GS_IDLE,    //!< puzzle not started yet
-	PB_GS_PLAYING, //!< puzzle actively being solved
-	PB_GS_SOLVED,  //!< puzzle completed
+enum pb_state {
+	PB_STATE_NOINIT,  //!< uninitialized (only used by puzzle modules)
+	PB_STATE_IDLE,    //!< puzzle not started yet
+	PB_STATE_PLAYING, //!< puzzle actively being solved
+	PB_STATE_SOLVED,  //!< puzzle completed
 };
+typedef enum pb_state pb_state_t;