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29 * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
32 * \brief PocketBus command abstraction layer.
36 * \author Francesco Sacchi <batt@develer.com>
38 * $WIZ$ module_name = "pocketcmd"
39 * $WIZ$ module_depends = "timer", "pocketbus"
42 #ifndef NET_POCKETCMD_H
43 #define NET_POCKETCMD_H
45 #include "pocketbus.h"
46 #include <cfg/compiler.h>
48 #define PKTCMD_NULL 0 ///< pocketBus Null command
50 #define PKTCMD_REPLY_TIMEOUT 50 ///< Command replay timeout in milliseconds
52 typedef uint16_t pocketcmd_t; ///< Type for Command IDs
55 * Header for transmitted pocketBus Commands.
57 typedef struct PocketCmdHdr
59 pocketcmd_t cmd; ///< command ID
63 * This ensure that endianess convertion functions work on
64 * the right data size.
67 STATIC_ASSERT(sizeof(pocketcmd_t) == sizeof(uint16_t));
74 * pocketBus command message structure.
76 typedef struct PocketCmdMsg
78 struct PocketCmdCtx *cmd_ctx; ///< command context
79 pocketcmd_t cmd; ///< command id
80 pocketbus_len_t len; ///< optional arg length
81 const uint8_t *buf; ///< optional arguments
85 * Type for command hooks.
87 typedef void (*pocketcmd_hook_t)(struct PocketCmdMsg *cmd_msg);
90 * Type for lookup function hooks.
92 typedef pocketcmd_hook_t (*pocketcmd_lookup_t)(pocketcmd_t cmd);
95 * pocketBus context for command layer communications.
97 typedef struct PocketCmdCtx
99 struct PocketBusCtx *bus_ctx; ///< pocketBus context
100 pocketbus_addr_t addr; ///< Our address
101 pocketcmd_lookup_t search; ///< Lookup function used to search for command callbacks
102 pocketcmd_t waiting; ///< The command ID we are waiting for or PKTCMD_NULL.
103 ticks_t reply_timer; ///< For waiting_reply
107 * Set slave address \a addr for pocketBus command layer.
108 * If we are a slave this is *our* address.
109 * If we are the master this is the slave address to send messages to.
111 INLINE void pocketcmd_setAddr(struct PocketCmdCtx *ctx, pocketbus_addr_t addr)
116 void pocketcmd_init(struct PocketCmdCtx *ctx, struct PocketBusCtx *bus_ctx, pocketbus_addr_t addr, pocketcmd_lookup_t search);
117 void pocketcmd_poll(struct PocketCmdCtx *ctx);
118 bool pocketcmd_send(struct PocketCmdCtx *ctx, pocketcmd_t cmd, const void *buf, size_t len, bool has_replay);
119 void pocketcmd_replyNak(struct PocketCmdMsg *msg);
120 void pocketcmd_replyAck(struct PocketCmdMsg *msg);
123 * Helper function used by master to send a command to slave \a addr.
125 INLINE bool pocketcmd_masterSend(struct PocketCmdCtx *ctx, pocketbus_addr_t addr, pocketcmd_t cmd, const void *buf, size_t len)
127 pocketcmd_setAddr(ctx, addr);
128 return pocketcmd_send(ctx, cmd, buf, len, true);
132 * Helper function used by slave to reply to a master command.
134 INLINE bool pocketcmd_slaveReply(struct PocketCmdCtx *ctx, pocketcmd_t cmd, const void *buf, size_t len)
136 return pocketcmd_send(ctx, cmd, buf, len, false);
140 #endif /* NET_POCKETCMD_H */