diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/cmd/terminal.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/cmd/terminal.c')
| -rw-r--r-- | roms/u-boot/cmd/terminal.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/roms/u-boot/cmd/terminal.c b/roms/u-boot/cmd/terminal.c new file mode 100644 index 000000000..9e32a4191 --- /dev/null +++ b/roms/u-boot/cmd/terminal.c @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * (C) Copyright 2007 OpenMoko, Inc. + * Written by Harald Welte <laforge@openmoko.org> + */ + +/* + * Boot support + */ +#include <common.h> +#include <command.h> +#include <stdio_dev.h> +#include <serial.h> + +int do_terminal(struct cmd_tbl *cmd, int flag, int argc, char *const argv[]) +{ + int last_tilde = 0; + struct stdio_dev *dev = NULL; + + if (argc < 1) + return -1; + + /* Scan for selected output/input device */ + dev = stdio_get_by_name(argv[1]); + if (!dev) + return -1; + + if (IS_ENABLED(CONFIG_SERIAL)) + serial_reinit_all(); + + printf("Entering terminal mode for port %s\n", dev->name); + puts("Use '~.' to leave the terminal and get back to u-boot\n"); + + while (1) { + int c; + + /* read from console and display on serial port */ + if (stdio_devices[0]->tstc(stdio_devices[0])) { + c = stdio_devices[0]->getc(stdio_devices[0]); + if (last_tilde == 1) { + if (c == '.') { + putc(c); + putc('\n'); + break; + } else { + last_tilde = 0; + /* write the delayed tilde */ + dev->putc(dev, '~'); + /* fall-through to print current + * character */ + } + } + if (c == '~') { + last_tilde = 1; + puts("[u-boot]"); + putc(c); + } + dev->putc(dev, c); + } + + /* read from serial port and display on console */ + if (dev->tstc(dev)) { + c = dev->getc(dev); + putc(c); + } + } + return 0; +} + + +/***************************************************/ + +U_BOOT_CMD( + terminal, 3, 1, do_terminal, + "start terminal emulator", + "" +); |