From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Babic Date: Tue, 09 Aug 2011 14:03:39 +0200 Subject: [U-Boot] y-modem protocol issue In-Reply-To: <4E410EA3.7070206@gmail.com> References: <4E410EA3.7070206@gmail.com> Message-ID: <4E41221B.1070504@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 08/09/2011 12:40 PM, Angelo Dureghello wrote: > Hi all, Hi Angelo, > 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. > "+ At the end of each file, the sending program shall send EOT up to ten times until it receives an ACK character. (This is part of the XMODEM spec.)" Why is u-boot not allowed to send an ACK ? I do not see this behavior on the protocol. Apart of that, which wrong behavior do you see on your target ? Can you transfer a file to your board ? I have tested, no issue found: loady ## Ready for binary (ymodem) download to 0x90800000 at 115200 bps... C## Total Size = 0x0003c418 = 246808 Bytes Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de =====================================================================