53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
#ifndef _MESSAGE_PARSER_HEADER
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#define _MESSAGE_PARSER_HEADER
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#include <stddef.h>
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#include <stdint.h>
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#define MAX_MESSAGE_PAYLOAD_LENGTH 128
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#define MAX_TOTAL_CONTENT_LENGTH (MAX_MESSAGE_PAYLOAD_LENGTH + 1)
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enum ParserState {
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WaitingForStartByte,
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GetMessageType,
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EscapedMessageType,
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EscapePayloadByte,
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InPayload,
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};
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enum ParserError {
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NoError,
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WrongCheckSum,
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MessageToLong,
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UnexpectedCommandByte,
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};
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typedef enum {
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StartByte = 0xAA,
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EscapeByte = 0xBB,
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EndByte = 0xCC,
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} MessageBytes;
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struct MessageReceive {
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enum ParserState state;
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enum ParserError error;
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uint8_t messageid;
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uint8_t message[MAX_MESSAGE_PAYLOAD_LENGTH];
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uint8_t index;
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uint8_t checksum;
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};
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typedef void (*MessageReceivedCallback)(uint8_t msgid, const uint8_t *payload,
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size_t payload_len);
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typedef void (*MessageFailCallback)(uint8_t msgid, const uint8_t *payload,
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size_t payload_len, enum ParserError error);
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struct MessageReceive InitMessageReceive();
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void register_message_callback(MessageReceivedCallback callback);
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void register_message_fail_callback(MessageFailCallback callback);
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void parse_byte(struct MessageReceive *mr, uint8_t pbyte);
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#endif
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