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/*
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file shell.c
* @brief Simple CLI shell code.
*
* @addtogroup SHELL
* @{
*/
#include <string.h>
#include "ch.h"
#include "hal.h"
#include "shell.h"
#include "chprintf.h"
/**
* @brief Shell termination event source.
*/
event_source_t shell_terminated;
static char *_strtok(char *str, const char *delim, char **saveptr) {
char *token;
if (str)
*saveptr = str;
token = *saveptr;
if (!token)
return NULL;
token += strspn(token, delim);
*saveptr = strpbrk(token, delim);
if (*saveptr)
*(*saveptr)++ = '\0';
return *token ? token : NULL;
}
static void usage(BaseSequentialStream *chp, char *p) {
chprintf(chp, "Usage: %s\r\n", p);
}
static void list_commands(BaseSequentialStream *chp, const ShellCommand *scp) {
while (scp->sc_name != NULL) {
chprintf(chp, "%s ", scp->sc_name);
scp++;
}
}
static void cmd_info(BaseSequentialStream *chp, int argc, char *argv[]) {
(void)argv;
if (argc > 0) {
usage(chp, "info");
return;
}
chprintf(chp, "Kernel: %s\r\n", CH_KERNEL_VERSION);
#ifdef PORT_COMPILER_NAME
chprintf(chp, "Compiler: %s\r\n", PORT_COMPILER_NAME);
#endif
chprintf(chp, "Architecture: %s\r\n", PORT_ARCHITECTURE_NAME);
#ifdef PORT_CORE_VARIANT_NAME
chprintf(chp, "Core Variant: %s\r\n", PORT_CORE_VARIANT_NAME);
#endif
#ifdef PORT_INFO
chprintf(chp, "Port Info: %s\r\n", PORT_INFO);
#endif
#ifdef PLATFORM_NAME
chprintf(chp, "Platform: %s\r\n", PLATFORM_NAME);
#endif
#ifdef BOARD_NAME
chprintf(chp, "Board: %s\r\n", BOARD_NAME);
#endif
#ifdef __DATE__
#ifdef __TIME__
chprintf(chp, "Build time: %s%s%s\r\n", __DATE__, " - ", __TIME__);
#endif
#endif
}
static void cmd_systime(BaseSequentialStream *chp, int argc, char *argv[]) {
(void)argv;
if (argc > 0) {
usage(chp, "systime");
return;
}
chprintf(chp, "%lu\r\n", (unsigned long)chVTGetSystemTime());
}
/**
* @brief Array of the default commands.
*/
static ShellCommand local_commands[] = {
{"info", cmd_info},
{"systime", cmd_systime},
{NULL, NULL}
};
static bool cmdexec(const ShellCommand *scp, BaseSequentialStream *chp,
char *name, int argc, char *argv[]) {
while (scp->sc_name != NULL) {
if (strcasecmp(scp->sc_name, name) == 0) {
scp->sc_function(chp, argc, argv);
return FALSE;
}
scp++;
}
return TRUE;
}
/**
* @brief Shell thread function.
*
* @param[in] p pointer to a @p BaseSequentialStream object
* @return Termination reason.
* @retval MSG_OK terminated by command.
* @retval MSG_RESET terminated by reset condition on the I/O channel.
*/
static msg_t shell_thread(void *p) {
int n;
msg_t msg = MSG_OK;
BaseSequentialStream *chp = ((ShellConfig *)p)->sc_channel;
const ShellCommand *scp = ((ShellConfig *)p)->sc_commands;
char *lp, *cmd, *tokp, line[SHELL_MAX_LINE_LENGTH];
char *args[SHELL_MAX_ARGUMENTS + 1];
chRegSetThreadName("shell");
chprintf(chp, "\r\nChibiOS/RT Shell\r\n");
while (TRUE) {
chprintf(chp, "ch> ");
if (shellGetLine(chp, line, sizeof(line))) {
chprintf(chp, "\r\nlogout");
break;
}
lp = _strtok(line, " \t", &tokp);
cmd = lp;
n = 0;
while ((lp = _strtok(NULL, " \t", &tokp)) != NULL) {
if (n >= SHELL_MAX_ARGUMENTS) {
chprintf(chp, "too many arguments\r\n");
cmd = NULL;
break;
}
args[n++] = lp;
}
args[n] = NULL;
if (cmd != NULL) {
if (strcasecmp(cmd, "exit") == 0) {
if (n > 0) {
usage(chp, "exit");
continue;
}
break;
}
else if (strcasecmp(cmd, "help") == 0) {
if (n > 0) {
usage(chp, "help");
continue;
}
chprintf(chp, "Commands: help exit ");
list_commands(chp, local_commands);
if (scp != NULL)
list_commands(chp, scp);
chprintf(chp, "\r\n");
}
else if (cmdexec(local_commands, chp, cmd, n, args) &&
((scp == NULL) || cmdexec(scp, chp, cmd, n, args))) {
chprintf(chp, "%s", cmd);
chprintf(chp, " ?\r\n");
}
}
}
/* Atomically broadcasting the event source and terminating the thread,
there is not a chSysUnlock() because the thread terminates upon return.*/
chSysLock();
chEvtBroadcastI(&shell_terminated);
chThdExitS(msg);
return 0; /* Never executed.*/
}
/**
* @brief Shell manager initialization.
*/
void shellInit(void) {
chEvtObjectInit(&shell_terminated);
}
/**
* @brief Spawns a new shell.
* @pre @p CH_CFG_USE_HEAP and @p CH_CFG_USE_DYNAMIC must be enabled.
*
* @param[in] scp pointer to a @p ShellConfig object
* @param[in] size size of the shell working area to be allocated
* @param[in] prio priority level for the new shell
* @return A pointer to the shell thread.
* @retval NULL thread creation failed because memory allocation.
*/
#if CH_CFG_USE_HEAP && CH_CFG_USE_DYNAMIC
thread_t *shellCreate(const ShellConfig *scp, size_t size, tprio_t prio) {
return chThdCreateFromHeap(NULL, size, prio, shell_thread, (void *)scp);
}
#endif
/**
* @brief Create statically allocated shell thread.
*
* @param[in] scp pointer to a @p ShellConfig object
* @param[in] wsp pointer to a working area dedicated to the shell thread stack
* @param[in] size size of the shell working area
* @param[in] prio priority level for the new shell
* @return A pointer to the shell thread.
*/
thread_t *shellCreateStatic(const ShellConfig *scp, void *wsp,
size_t size, tprio_t prio) {
return chThdCreateStatic(wsp, size, prio, shell_thread, (void *)scp);
}
/**
* @brief Reads a whole line from the input channel.
*
* @param[in] chp pointer to a @p BaseSequentialStream object
* @param[in] line pointer to the line buffer
* @param[in] size buffer maximum length
* @return The operation status.
* @retval TRUE the channel was reset or CTRL-D pressed.
* @retval FALSE operation successful.
*/
bool shellGetLine(BaseSequentialStream *chp, char *line, unsigned size) {
char *p = line;
while (TRUE) {
char c;
if (chSequentialStreamRead(chp, (uint8_t *)&c, 1) == 0)
return TRUE;
if (c == 4) {
chprintf(chp, "^D");
return TRUE;
}
if (c == 8) {
if (p != line) {
chSequentialStreamPut(chp, c);
chSequentialStreamPut(chp, 0x20);
chSequentialStreamPut(chp, c);
p--;
}
continue;
}
if (c == '\r') {
chprintf(chp, "\r\n");
*p = 0;
return FALSE;
}
if (c < 0x20)
continue;
if (p < line + size - 1) {
chSequentialStreamPut(chp, c);
*p++ = (char)c;
}
}
}
/** @} */
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