MightyPork
/
TinyFrame
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Added support for custom checksums

Browse Source
pull/14/head
Ondřej Hruška 7 years ago
parent b74bda7cf5
commit 91e1c25c6d
Signed by: MightyPork
GPG Key ID: 2C5FD5035250423D
6 changed files with 174 additions and 147 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 14
      TF_Config.example.h
  2. 83
      TinyFrame.c
  3. 65
      TinyFrame.h
  4. 1
      demo/multipart_tx/TF_Config.h
  5. 1
      demo/simple/TF_Config.h
  6. 1
      demo/socket_demo/TF_Config.h

14
TF_Config.example.h
Unescape View File

@ -8,6 +8,7 @@
#define TF_CONFIG_H
#include <stdint.h>
#include <stdio.h> // used by the TF_Error() macro defined below
//#include <esp8266.h> // when using with esphttpd
//----------------------------- FRAME FORMAT ---------------------------------
@ -28,11 +29,11 @@
#define TF_LEN_BYTES 2
#define TF_TYPE_BYTES 1
// Checksum type
//#define TF_CKSUM_TYPE TF_CKSUM_NONE
//#define TF_CKSUM_TYPE TF_CKSUM_XOR
#define TF_CKSUM_TYPE TF_CKSUM_CRC16
//#define TF_CKSUM_TYPE TF_CKSUM_CRC32
// Checksum type. Options:
// TF_CKSUM_NONE, TF_CKSUM_XOR, TF_CKSUM_CRC16, TF_CKSUM_CRC32
// TF_CKSUM_CUSTOM8, TF_CKSUM_CUSTOM16, TF_CKSUM_CUSTOM32
// Custom checksums require you to implement checksum functions (see TinyFrame.h)
#define TF_CKSUM_TYPE TF_CKSUM_CUSTOM8
// Use a SOF byte to mark the start of a frame
#define TF_USE_SOF_BYTE 1
@ -69,6 +70,9 @@ typedef uint8_t TF_COUNT;
// ticks = number of calls to TF_Tick()
#define TF_PARSER_TIMEOUT_TICKS 10
// Whether to use mutex - requires you to implement TF_ClaimTx() and TF_ReleaseTx()
#define TF_USE_MUTEX 1
// Error reporting function. To disable debug, change to empty define
#define TF_Error(format, ...) printf("[TF] " format "\n", ##__VA_ARGS__)

83
TinyFrame.c
Unescape View File

@ -1,6 +1,6 @@
//---------------------------------------------------------------------------
#include "TinyFrame.h"
#include <malloc.h>
#include <stdlib.h> // - for malloc() if dynamic constructor is used
//---------------------------------------------------------------------------
// Compatibility with ESP8266 SDK
@ -18,27 +18,36 @@
// mandate configurable field sizes unless we use u32 everywhere (and possibly shorten
// it when encoding to the buffer). I don't really like this idea so much. -MP
#if TF_USE_MUTEX==0
/** Claim the TX interface before composing and sending a frame */
static inline void TF_ClaimTx(TinyFrame *tf) { (void)tf; }
/** Free the TX interface after composing and sending a frame */
static inline void TF_ReleaseTx(TinyFrame *tf) { (void)tf; }
#endif
//region Checksums
#define CKSUM_RESET(cksum) do { (cksum) = TF_CksumStart(); } while (0)
#define CKSUM_ADD(cksum, byte) do { (cksum) = TF_CksumAdd((cksum), (byte)); } while (0)
#define CKSUM_FINALIZE(cksum) do { (cksum) = TF_CksumEnd((cksum)); } while (0)
#if TF_CKSUM_TYPE == TF_CKSUM_NONE
// NONE
#define CKSUM_RESET(cksum)
#define CKSUM_ADD(cksum, byte)
#define CKSUM_FINALIZE(cksum)
TF_CKSUM TF_CksumStart(void) { return 0; }
TF_CKSUM TF_CksumAdd(TF_CKSUM cksum, uint8_t byte) { return cksum; }
TF_CKSUM TF_CksumEnd(TF_CKSUM cksum) { return cksum; }
#elif TF_CKSUM_TYPE == TF_CKSUM_XOR
// ~XOR
#define CKSUM_RESET(cksum) do { (cksum) = 0; } while (0)
#define CKSUM_ADD(cksum, byte) do { (cksum) ^= (byte); } while(0)
#define CKSUM_FINALIZE(cksum) do { (cksum) = (TF_CKSUM)~cksum; } while(0)
TF_CKSUM TF_CksumStart(void) { return 0; }
TF_CKSUM TF_CksumAdd(TF_CKSUM cksum, uint8_t byte) { return cksum ^ byte; }
TF_CKSUM TF_CksumEnd(TF_CKSUM cksum) { return (TF_CKSUM) ~cksum; }
#elif TF_CKSUM_TYPE == TF_CKSUM_CRC16
// TODO try to replace with an algorithm
/** CRC table for the CRC-16. The poly is 0x8005 (x^16 + x^15 + x^2 + 1) */
static const uint16_t crc16_table[256] = {
// TODO try to replace with an algorithm
/** CRC table for the CRC-16. The poly is 0x8005 (x^16 + x^15 + x^2 + 1) */
static const uint16_t crc16_table[256] = {
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
@ -71,21 +80,16 @@ static const uint16_t crc16_table[256] = {
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
};
static inline uint16_t crc16_byte(uint16_t cksum, const uint8_t byte)
{
return (cksum >> 8) ^ crc16_table[(cksum ^ byte) & 0xff];
}
};
#define CKSUM_RESET(cksum) do { (cksum) = 0; } while (0)
#define CKSUM_ADD(cksum, byte) do { (cksum) = crc16_byte((cksum), (byte)); } while(0)
#define CKSUM_FINALIZE(cksum)
TF_CKSUM TF_CksumStart(void) { return 0; }
TF_CKSUM TF_CksumAdd(TF_CKSUM cksum, uint8_t byte) { return (cksum >> 8) ^ crc16_table[(cksum ^ byte) & 0xff]; }
TF_CKSUM TF_CksumEnd(TF_CKSUM cksum) { return cksum; }
#elif TF_CKSUM_TYPE == TF_CKSUM_CRC32
// TODO try to replace with an algorithm
static const uint32_t crc32_table[] = { /* CRC polynomial 0xedb88320 */
// TODO try to replace with an algorithm
static const uint32_t crc32_table[] = { /* CRC polynomial 0xedb88320 */
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
@ -129,16 +133,11 @@ static const uint32_t crc32_table[] = { /* CRC polynomial 0xedb88320 */
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
};
};
static inline uint32_t crc32_byte(uint32_t cksum, const uint8_t byte)
{
return (crc32_table[((cksum) ^ ((uint8_t)byte)) & 0xff] ^ ((cksum) >> 8));
}
#define CKSUM_RESET(cksum) do { (cksum) = (TF_CKSUM)0xFFFFFFFF; } while (0)
#define CKSUM_ADD(cksum, byte) do { (cksum) = crc32_byte(cksum, byte); } while(0)
#define CKSUM_FINALIZE(cksum) do { (cksum) = (TF_CKSUM)~(cksum); } while(0)
TF_CKSUM TF_CksumStart(void) { return (TF_CKSUM)0xFFFFFFFF; }
TF_CKSUM TF_CksumAdd(TF_CKSUM cksum, uint8_t byte) { return crc32_table[((cksum) ^ ((uint8_t)byte)) & 0xff] ^ ((cksum) >> 8); }
TF_CKSUM TF_CksumEnd(TF_CKSUM cksum) { return (TF_CKSUM) ~cksum; }
#endif
@ -586,8 +585,8 @@ void _TF_FN TF_AcceptChar(TinyFrame *tf, unsigned char c)
if (tf->rxi == tf->len) {
#if TF_CKSUM_TYPE == TF_CKSUM_NONE
// All done
TF_HandleReceivedMessage();
TF_ResetParser();
TF_HandleReceivedMessage(tf);
TF_ResetParser(tf);
#else
// Enter DATA_CKSUM state
tf->state = TFState_DATA_CKSUM;
@ -898,19 +897,3 @@ void _TF_FN TF_Tick(TinyFrame *tf)
}
}
}
/** Default impl for claiming write mutex; can be specific to the instance */
void __attribute__((weak)) TF_ClaimTx(TinyFrame *tf)
{
(void) tf;
// do nothing
}
/** Default impl for releasing write mutex; can be specific to the instance */
void __attribute__((weak)) TF_ReleaseTx(TinyFrame *tf)
{
(void) tf;
// do nothing
}

65
TinyFrame.h
Unescape View File

@ -4,13 +4,13 @@
/**
* TinyFrame protocol library
*
* (c) Ondřej Hruška 2017, MIT License
* (c) Ondřej Hruška 2017-2018, MIT License
* no liability/warranty, free for any use, must retain this notice & license
*
* Upstream URL: https://github.com/MightyPork/TinyFrame
*/
#define TF_VERSION "2.1.0"
#define TF_VERSION "2.2.0"
//---------------------------------------------------------------------------
#include <stdint.h> // for uint8_t etc
@ -19,11 +19,14 @@
#include <string.h> // for memset()
//---------------------------------------------------------------------------
// Select checksum type (0 = none, 8 = ~XOR, 16 = CRC16 0x8005, 32 = CRC32)
// Checksum type (0 = none, 8 = ~XOR, 16 = CRC16 0x8005, 32 = CRC32)
#define TF_CKSUM_NONE 0
#define TF_CKSUM_XOR 8
#define TF_CKSUM_CRC16 16
#define TF_CKSUM_CRC32 32
#define TF_CKSUM_CUSTOM8 1
#define TF_CKSUM_CUSTOM16 2
#define TF_CKSUM_CUSTOM32 3
#include "TF_Config.h"
@ -62,17 +65,17 @@ typedef uint32_t TF_ID;
#endif
#if TF_CKSUM_TYPE == TF_CKSUM_XOR || TF_CKSUM_TYPE == TF_CKSUM_NONE
#if (TF_CKSUM_TYPE == TF_CKSUM_XOR) || (TF_CKSUM_TYPE == TF_CKSUM_NONE) || (TF_CKSUM_TYPE == TF_CKSUM_CUSTOM8)
// ~XOR (if 0, still use 1 byte - it won't be used)
typedef uint8_t TF_CKSUM;
#elif TF_CKSUM_TYPE == TF_CKSUM_CRC16
#elif (TF_CKSUM_TYPE == TF_CKSUM_CRC16) || (TF_CKSUM_TYPE == TF_CKSUM_CUSTOM16)
// CRC16
typedef uint16_t TF_CKSUM;
#elif TF_CKSUM_TYPE == TF_CKSUM_CRC32
#elif (TF_CKSUM_TYPE == TF_CKSUM_CRC32) || (TF_CKSUM_TYPE == TF_CKSUM_CUSTOM32)
// CRC32
typedef uint32_t TF_CKSUM;
#else
#error Bad value for TF_CKSUM_TYPE, must be 8, 16 or 32
#error Bad value for TF_CKSUM_TYPE
#endif
//endregion
@ -100,7 +103,7 @@ typedef enum {
} TF_Result;
/** Data structure for sending / receiving messages */
typedef struct _TF_MSG_STRUCT_ {
typedef struct TF_Msg_ {
TF_ID frame_id; //!< message ID
bool is_response; //!< internal flag, set when using the Respond function. frame_id is then kept unchanged.
TF_TYPE type; //!< received or sent message type
@ -135,7 +138,7 @@ typedef TF_Result (*TF_Listener)(TinyFrame *tf, TF_Msg *msg);
// region Internal
enum TFState_ {
enum TF_State_ {
TFState_SOF = 0, //!< Wait for SOF
TFState_LEN, //!< Wait for Number Of Bytes
TFState_HEAD_CKSUM, //!< Wait for header Checksum
@ -178,7 +181,7 @@ struct TinyFrame_ {
TF_ID next_id; //!< Next frame / frame chain ID
/* Parser state */
enum TFState_ state;
enum TF_State_ state;
TF_TICKS parser_timeout_ticks;
TF_ID id; //!< Incoming packet ID
TF_LEN len; //!< Payload length
@ -375,10 +378,44 @@ void TF_Tick(TinyFrame *tf);
*/
extern void TF_WriteImpl(TinyFrame *tf, const uint8_t *buff, size_t len);
/** Claim the TX interface before composing and sending a frame */
extern void TF_ClaimTx(TinyFrame *tf);
// Mutex functions
#if TF_USE_MUTEX
/** Free the TX interface after composing and sending a frame */
extern void TF_ReleaseTx(TinyFrame *tf);
/** Claim the TX interface before composing and sending a frame */
extern void TF_ClaimTx(TinyFrame *tf);
/** Free the TX interface after composing and sending a frame */
extern void TF_ReleaseTx(TinyFrame *tf);
#endif
// Custom checksum functions
#if (TF_CKSUM_TYPE == TF_CKSUM_CUSTOM8) || (TF_CKSUM_TYPE == TF_CKSUM_CUSTOM16) || (TF_CKSUM_TYPE == TF_CKSUM_CUSTOM32)
/**
* Initialize a checksum
*
* @return initial checksum value
*/
extern TF_CKSUM TF_CksumStart(void);
/**
* Update a checksum with a byte
*
* @param cksum - previous checksum value
* @param byte - byte to add
* @return updated checksum value
*/
extern TF_CKSUM TF_CksumAdd(TF_CKSUM cksum, uint8_t byte);
/**
* Finalize the checksum calculation
*
* @param cksum - previous checksum value
* @return final checksum value
*/
extern TF_CKSUM TF_CksumEnd(TF_CKSUM cksum);
#endif
#endif

1
demo/multipart_tx/TF_Config.h
Unescape View File

@ -6,6 +6,7 @@
#define TF_CONFIG_H
#include <stdint.h>
#include <stdio.h>
#define TF_ID_BYTES 1
#define TF_LEN_BYTES 2

1
demo/simple/TF_Config.h
Unescape View File

@ -6,6 +6,7 @@
#define TF_CONFIG_H
#include <stdint.h>
#include <stdio.h>
#define TF_ID_BYTES 1
#define TF_LEN_BYTES 2

1
demo/socket_demo/TF_Config.h
Unescape View File

@ -6,6 +6,7 @@
#define TF_CONFIG_H
#include <stdint.h>
#include <stdio.h>
#define TF_ID_BYTES 1
#define TF_LEN_BYTES 2

Write Preview
Loading…
Cancel
Save