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12-byte interleaver

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This commit is contained in:
Mark Qvist 2014-04-17 14:25:16 +02:00
parent 35a92e167e
commit 2462188597
4 changed files with 491 additions and 228 deletions
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7
Modem/protocol/mp1.h
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@ -5,9 +5,10 @@
#include <io/kfile.h>
// Frame sizing & checksum
#define MP1_MIN_FRAME_LENGTH 3
#define MP1_INTERLEAVE_SIZE 12
#define MP1_MIN_FRAME_LENGTH MP1_INTERLEAVE_SIZE
#define MP1_DATA_BLOCK_SIZE ((MP1_INTERLEAVE_SIZE/3)*2)
#define MP1_MAX_FRAME_LENGTH 250
#define MP1_INTERLEAVE_SIZE 3
#define MP1_CHECKSUM_INIT 0xAA
// We need to know some basic HDLC flag bytes
@ -33,7 +34,7 @@ typedef void (*mp1_callback_t)(struct MP1Packet *packet);
// Struct for a protocol context
typedef struct MP1 {
uint8_t buffer[MP1_MAX_FRAME_LENGTH]; // A buffer for incoming packets
uint8_t fecBuffer[3]; // FEC buffer
uint8_t fecBuffer[3]; // Forward Error Correction buffer
KFile *modem; // KFile access to the modem
size_t packetLength; // Counter for received packet length
size_t readLength; // This is the full read length, including parity bytes