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samples: shell: shell_module: Add shell bypass demo command

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Add command which presents bypass functionality.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
This commit is contained in:
Krzysztof Chruscinski 2021-06-09 10:59:19 +02:00 • committed by Anas Nashif
commit 8e4d9ae2e8
1 changed files with 71 additions and 0 deletions
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71
samples/subsys/shell/shell_module/src/main.c
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@ -222,6 +222,75 @@ static int cmd_logout(const struct shell *shell, size_t argc, char **argv)
return 0;
}
static int set_bypass(const struct shell *sh, shell_bypass_cb_t bypass)
{
static bool in_use;
if (bypass && in_use) {
shell_error(sh, "Sample supports setting bypass on single instance.");
return -EBUSY;
}
in_use = !in_use;
if (in_use) {
shell_print(sh, "Bypass started, press ctrl-x ctrl-q to escape");
in_use = true;
}
shell_set_bypass(sh, bypass);
return 0;
}
#define CHAR_1 0x18
#define CHAR_2 0x11
static void bypass_cb(const struct shell *sh, uint8_t *data, size_t len)
{
static uint8_t tail;
bool escape = false;
/* Check if escape criteria is met. */
if (tail == CHAR_1 && data[0] == CHAR_2) {
escape = true;
} else {
for (int i = 0; i < (len - 1); i++) {
if (data[i] == CHAR_1 && data[i + 1] == CHAR_2) {
escape = true;
break;
}
}
}
if (escape) {
shell_print(sh, "Exit bypass");
set_bypass(sh, NULL);
tail = 0;
return;
}
/* Store last byte for escape sequence detection */
tail = data[len - 1];
/* Do the data processing. */
for (int i = 0; i < len; i++) {
shell_fprintf(sh, SHELL_INFO, "%02x ", data[i]);
}
shell_fprintf(sh, SHELL_INFO, "| ");
for (int i = 0; i < len; i++) {
shell_fprintf(sh, SHELL_INFO, "%c", data[i]);
}
shell_fprintf(sh, SHELL_INFO, "\n");
}
static int cmd_bypass(const struct shell *sh, size_t argc, char **argv)
{
return set_bypass(sh, bypass_cb);
}
static int cmd_dict(const struct shell *shell, size_t argc, char **argv,
void *data)
{
@ -251,6 +320,8 @@ SHELL_CMD_REGISTER(demo, &sub_demo, "Demo commands", NULL);
SHELL_CMD_ARG_REGISTER(version, NULL, "Show kernel version", cmd_version, 1, 0);
SHELL_CMD_ARG_REGISTER(bypass, NULL, "Bypass shell", cmd_bypass, 1, 0);
SHELL_COND_CMD_ARG_REGISTER(CONFIG_SHELL_START_OBSCURED, login, NULL,
"<password>", cmd_login, 2, 0);