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92 lines
2.3 KiB
92 lines
2.3 KiB
9 years ago
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#ifndef ESP_LINK_H
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#define ESP_LINK_H
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#include <inttypes.h>
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#include <Stream.h>
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typedef struct __attribute__((__packed__)) {
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uint16_t len; // length of data
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uint8_t data[0]; // really data[len]
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} CmdArg;
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typedef struct __attribute__((__packed__)) {
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uint16_t cmd; // command to perform, from CmdName enum
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uint16_t argc; // number of arguments to command
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uint32_t value; // callback pointer for response or first argument
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CmdArg args[0]; // really args[argc]
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} CmdPacket;
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typedef struct {
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CmdPacket *cmd; // command packet header
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uint32_t arg_num; // number of args parsed
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uint8_t *arg_ptr; // pointer to ??
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} CmdRequest;
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typedef void (* CmdRequestCB)(CmdRequest *);
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typedef enum {
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CMD_NULL = 0,
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CMD_SYNC, // synchronize and clear
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CMD_RESP_V, // response with a value
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CMD_RESP_CB, // response with a callback
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CMD_WIFI_STATUS, // get the current wifi status
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CMD_CB_ADD,
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CMD_CB_EVENTS,
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CMD_GET_TIME, // get current time in seconds since the unix epoch
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CMD_MQTT_SETUP = 10, // set-up callbacks
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CMD_MQTT_PUBLISH, // publish a message
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CMD_MQTT_SUBSCRIBE, // subscribe to a topic
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CMD_MQTT_LWT, // set the last-will-topic and messge
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CMD_REST_SETUP = 20,
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CMD_REST_REQUEST,
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CMD_REST_SETHEADER,
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CMD_WEB_DATA = 30,
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CMD_WEB_REQ_CB,
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} CmdName;
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typedef enum
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{
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WAIT_FOR_SLIP_START,
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READ_SLIP_PACKAGE,
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} ReadState;
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class EspLink
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{
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private:
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uint16_t crc16_out;
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Stream &stream;
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ReadState readState;
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uint8_t * readBuf;
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uint16_t readBufPtr;
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uint16_t readBufMax;
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int readLastChar;
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CmdRequestCB requestCb;
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void crc16_add(uint8_t b, uint16_t *crc);
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void writeChar(uint8_t chr);
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void writeBuf(uint8_t * buf, uint16_t len);
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void checkPacket();
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void parseSlipPacket();
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public:
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EspLink(Stream &stream, CmdRequestCB callback);
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~EspLink();
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void sendPacketStart(uint16_t cmd, uint32_t value, uint16_t argc);
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void sendPacketArg(uint16_t len, uint8_t * data);
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void sendPacketEnd();
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void readLoop();
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uint32_t cmdGetArgc(CmdRequest *req);
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int32_t cmdPopArg(CmdRequest *req, void *data, uint16_t len);
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void cmdSkipArg(CmdRequest *req);
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uint16_t cmdArgLen(CmdRequest *req);
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};
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#endif /* ESP_LINK_H */
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