XMODEM Checksum does CRC

• 回報者: (匿名)
• 負責人: (無)
• 類型: 問題回報
• 狀態: 關閉
• 元件: Tera Term
• 里程碑: (無)
• 優先權: 5 - 中
• 嚴重程度: 5 - 中
• 處理結果: Won't Fix
• 檔案: 無

細節 回覆

Tying to send a file by XMODEM-Checksum (8-Bit Modulo) will be sent as XMODEM-CRC. To select the option "Checksum" has no effect. First in transfer window "checksum" will be shown. Receiver sends an xH01 (SOH) and sender should send first block. But when receiver sends SOH, nothing happens. When receiver sends an "C" as ready-signal for a CRC-transfer, Teraterm will change its status to "CRC" in tranfer windows and the transfer will start as CRC.

So Xmodem with Option "Checksum" doesnt work...

Found this error by trying to use TT for XMODEM-Firmware-upload to an Atmega128 with self programmed bootloader with XMODEM-Checksum.

Thank you for correcting this ...

[e-mail]

Ticket History (3/9 Histories)

2011-05-30 16:52 Updated by: None

• New Ticket "XMODEM Checksum does CRC" created

2011-05-30 20:01 Updated by: (del#1144)

• 負責人 Update from tt337 to (無)
• 里程碑 Update from Tera Term 4.70 (closed) to (無)

2011-05-30 20:44 Updated by: (del#1144)

評語 回覆

Could you please let us see xmodem.log?

2011-05-30 23:44 Updated by: None

評語 回覆

Have no log. I tried to upload firmware to Atmega128 with my own created bootloader. Could'nt get it running with TT. Other Terminals work fine... So i connected another PC to RS232. I started transfer at TT. Then i sent xH01 from the other PC Nothing hapened.

After the receiver sent xH01 (SOH) the transmitter should start XModem-send with 8-Bit-checksum.

So i sent ASCII "C" to TT, which is starting character for XMODEM-CRC. The statuswindow of TT changed from "checksum" to "CRC" and TT sent a block with 16bit CRC- checkksum...

2011-05-31 00:02 Updated by: None

評語 回覆

Sorry, SOH = xH15, but i did that right in my code...

2011-05-31 00:03 Updated by: None

評語 回覆

Forget last entry :-)

2011-05-31 00:29 Updated by: (del#1144)

評語 回覆

If set XmodemLog=on in TERATERM.INI, the transfer log of xmodem is saved to teraterm directory.

2016-01-19 22:07 Updated by: doda

• 處理結果 Update from 無 to Won't Fix

評語 回覆

Type of error detection can be only specified at receiver side. It's xmodem protocol specification.

2016-03-06 19:58 Updated by: (del#1144)

• 狀態 Update from 開啟 to 關閉
• Ticket Close date is changed to 2016-03-06 19:58