--- a/master/globals.h	Tue Jun 10 12:52:08 2008 +0000
+++ b/master/globals.h	Wed Jun 11 13:01:21 2008 +0000
@@ -99,6 +99,59 @@
 /** Size of an FMMU configuration page. */
 #define EC_FMMU_PAGE_SIZE 16
 
+/** Slave state mask.
+ *
+ * Apply this mask to a slave state byte to get the slave state without
+ * the error flag.
+ */
+#define EC_SLAVE_STATE_MASK 0x0F
+
+/** State of an EtherCAT slave.
+ */
+typedef enum {
+    EC_SLAVE_STATE_UNKNOWN = 0x00,
+    /**< unknown state */
+    EC_SLAVE_STATE_INIT = 0x01,
+    /**< INIT state (no mailbox communication, no IO) */
+    EC_SLAVE_STATE_PREOP = 0x02,
+    /**< PREOP state (mailbox communication, no IO) */
+    EC_SLAVE_STATE_SAFEOP = 0x04,
+    /**< SAFEOP (mailbox communication and input update) */
+    EC_SLAVE_STATE_OP = 0x08,
+    /**< OP (mailbox communication and input/output update) */
+    EC_SLAVE_STATE_ACK_ERR = 0x10
+    /**< Acknowledge/Error bit (no actual state) */
+} ec_slave_state_t;
+
+/** Supported mailbox protocols.
+ */
+enum {
+    EC_MBOX_AOE = 0x01, /**< ADS-over-EtherCAT */
+    EC_MBOX_EOE = 0x02, /**< Ethernet-over-EtherCAT */
+    EC_MBOX_COE = 0x04, /**< CANopen-over-EtherCAT */
+    EC_MBOX_FOE = 0x08, /**< File-Access-over-EtherCAT */
+    EC_MBOX_SOE = 0x10, /**< Servo-Profile-over-EtherCAT */
+    EC_MBOX_VOE = 0x20  /**< Vendor specific */
+};
+
+/** Slave information interface CANopen-over-EtherCAT details flags.
+ */
+typedef struct {
+    uint8_t enable_sdo : 1; /**< Enable Sdo access. */
+    uint8_t enable_sdo_info : 1; /**< SDO information service available. */
+    uint8_t enable_pdo_assign : 1; /**< Pdo mapping configurable. */
+    uint8_t enable_pdo_configuration : 1; /**< Pdo configuration possible. */
+    uint8_t enable_upload_at_startup : 1; /**< ?. */
+    uint8_t enable_sdo_complete_access : 1; /**< Complete access possible. */
+} ec_sii_coe_details_t;
+
+/** Slave information interface general flags.
+ */
+typedef struct {
+    uint8_t enable_safeop : 1; /**< ?. */
+    uint8_t enable_not_lrw : 1; /**< Slave does not support LRW. */
+} ec_sii_general_flags_t;
+
 /*****************************************************************************/
 
 /** Convenience macro for printing EtherCAT-specific information to syslog.