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xyz-modem: Allow to cancel transfer also by CTRL+C

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Currently it is possible to cancel loadx and loady commands by pressing
CTRL+X (CAN character) at least 3 times quickly.

All other U-Boot commands, including loadb and loads can be cancelled by
CTRL+C. So allow it also in xyz-modem code used by loadx and loady
commands. Implement it by handling CTRL+C (ETX character) in the same way
as CTRL+X (CAN character).

Due to how x/y-modem protocol works, it is required to press
CTRL+C or CTRL+X at least 3 times quickly.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Pali Rohár 2021-08-03 16:28:44 +02:00 • committed by Tom Rini
parent c97b2557bc
commit dffeb40098
1 changed files with 2 additions and 0 deletions
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2
common/xyzModem.c
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@ -32,6 +32,7 @@
/* Values magic to the protocol */
#define SOH 0x01
#define STX 0x02
#define ETX 0x03 /* ^C for interrupt */
#define EOT 0x04
#define ACK 0x06
#define BSP 0x08
@ -283,6 +284,7 @@ xyzModem_get_hdr (void)
hdr_found = true;
break;
case CAN:
case ETX:
xyz.total_CAN++;
ZM_DEBUG (zm_dump (__LINE__));
if (++can_total == xyzModem_CAN_COUNT)