ymodem.h

EX44B0开发板BootLoader

#ifndef __YMODEM_H__
#define __YMODEM_H__

#define PACKET_SEQNO_INDEX		1
#define PACKET_SEQNO_COMP_INDEX	2

#define PACKET_HEADER			3
#define PACKET_TRAILER			2
#define PACKET_OVERHEAD			(PACKET_HEADER + PACKET_TRAILER)
#define PACKET_SIZE				128
#define PACKET_1K_SIZE			1024

#define SOH						0x01	/* start of 128-byte data packet */
#define STX						0x02	/* start of 1024-byte data packet */
#define EOT						0x04	/* end of transmission */
#define ACK						0x06	/* acknowledge */
#define NAK						0x15	/* negative acknowledge */
#define CAN						0x18	/* two of these in succession aborts transfer */
#define CRC16					0x43	/* 'C' == 0x43, request 16-bit CRC */

#define ABORT1					0x41	/* 'A' == 0x41, abort by user */
#define ABORT2					0x61	/* 'a' == 0x61, abort by user */

#define NAK_TIMEOUT				0x400000
#define MAX_ERRORS				5

int Ymodem_Receive(void *buf, char *filename);

#endif