ymodem.h
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//Define to prevent recursive inclusion
#ifndef __YMODEM_H_
#define __YMODEM_H_
#include <stm32f4xx.h>
//Exported macro
#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 FILE_NAME_LENGTH (256)
#define FILE_SIZE_LENGTH (16)
#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 NACK (0x15) /* negative acknowledge */
#define CA (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 (0x50000)
#define MAX_ERRORS (5)
//User Define Area
//Exported functions
extern uint8_t FileName[FILE_NAME_LENGTH];//array to store filename of download *.bin
extern uint8_t buf_1k[1024];
int32_t Ymodem_Receive (uint8_t *,uint32_t appaddr);
extern char file_size[FILE_SIZE_LENGTH];
extern USART_TypeDef * IAP_Port;
#endif