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78 lines
1.9 KiB
ReStructuredText
78 lines
1.9 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+:
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loadx command
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=============
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Synopsis
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--------
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::
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loadx [addr [baud]]
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Description
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-----------
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The loadx command is used to transfer a file to the device via the serial line
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using the XMODEM protocol.
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The number of transferred bytes is saved in environment variable filesize.
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addr
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load address, defaults to environment variable loadaddr or if loadaddr is
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not set to configuration variable CONFIG_SYS_LOAD_ADDR
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baud
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baud rate for the ymodem transmission. After the transmission the baud
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rate is reset to the original value.
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Example
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-------
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In the example below the terminal emulation program picocom was used to
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transfer a file to the device.
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.. code-block::
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picocom --send-cmd 'sx -b vv' --baud 115200 /dev/ttyUSB0
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After entering the loadx command the key sequence <CTRL-A><CTRL-S> is used to
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let picocom prompt for the file name. Picocom invokes the program sx for the
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file transfer.
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::
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=> loadx 60800000 115200
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## Ready for binary (xmodem) download to 0x60800000 at 115200 bps...
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C
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*** file: helloworld.efi
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$ sx -b vv helloworld.efi
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sx: cannot open vv: No such file or directory
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Sending helloworld.efi, 24 blocks: Give your local XMODEM receive command now.
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Xmodem sectors/kbytes sent: 0/ 0kRetry 0: NAK on sector
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Bytes Sent: 3072 BPS:1147
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Transfer incomplete
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*** exit status: 1 ***
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## Total Size = 0x00000c00 = 3072 Bytes
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## Start Addr = 0x60800000
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=>
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The transfer can be cancelled by pressing 3 times <CTRL+C> after two seconds
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of inactivity on terminal.
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Configuration
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-------------
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The command is only available if CONFIG_CMD_LOADB=y.
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Initial timeout in seconds while waiting for transfer is configured by
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config option CMD_LOADXY_TIMEOUT or by env variable $loadxy_timeout.
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Setting it to 0 means infinite timeout.
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Return value
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------------
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The return value $? is 0 (true) on success, 1 (false) otherwise.
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