[U-Boot] y-modem protocol issue

9 Aug 2011


      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

[U-Boot] y-modem protocol issue

Angelo Dureghello