From mboxrd@z Thu Jan  1 00:00:00 1970
From: Angelo Dureghello <angelo70@gmail.com>
Date: Tue, 09 Aug 2011 12:40:35 +0200
Subject: [U-Boot] y-modem protocol issue
Message-ID: <4E410EA3.7070206@gmail.com>
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To: u-boot@lists.denx.de

Hi all,

just to inform, seems xyzModem is not following the protocol spec of YModem:

YMODEM Batch Transmission Session (1 file)

SENDER                                      RECEIVER
                                        <-- C (command:rb)
SOH 00 FF foo.c NUL[123] CRC CRC        -->
                                        <-- ACK
                                        <-- C
SOH 01 FE Data[128] CRC CRC             -->
                                        <-- ACK
SOH 02 FC Data[128] CRC CRC             -->
                                        <-- ACK
SOH 03 FB Data[100] CPMEOF[28] CRC CRC  -->
                                        <-- ACK
EOT                                     -->
                                        <-- NAK
EOT                                     -->
                                        <-- ACK
                                        <-- C
SOH 00 FF NUL[128] CRC CRC              -->
                                        <-- ACK



After first EOT u-boot send an ACK, not correct.
Same behavior using SOH or STX.

Regards
angelo