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