drivers/can/can_shell.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2019 Alexander Wachter
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #include <sys/printk.h>
 #include <shell/shell.h>
 #include <drivers/can.h>
 #include <zephyr/types.h>
 #include <stdlib.h>

 static struct zcan_work work;

 static inline int read_config_options(const struct shell *shell, int pos,
 				      char **argv, bool *silent, bool *loopback)
 {
 	char *arg = argv[pos];

 	if (arg[0] != '-') {
 		return pos;
 	}

 	for (arg = &arg[1]; *arg; arg++) {
 		switch (*arg) {
 		case 's':
 			if (silent == NULL) {
 				shell_error(shell, "unknown option %c", *arg);
 			} else {
 				*silent = true;
 			}
 			break;
 		case 'l':
 			if (loopback == NULL) {
 				shell_error(shell, "unknown option %c", *arg);
 			} else {
 				*loopback = true;
 			}
 			break;
 		default:
 			shell_error(shell, "unknown option %c", *arg);
 			return -EINVAL;
 		}
 	}

 	return ++pos;
 }

 static inline int read_frame_options(const struct shell *shell, int pos,
 				     char **argv, bool *rtr, bool *ext)
 {
 	char *arg = argv[pos];

 	if (arg[0] != '-') {
 		return pos;
 	}

 	for (arg = &arg[1]; *arg; arg++) {
 		switch (*arg) {
 		case 'r':
 			if (rtr == NULL) {
 				shell_error(shell, "unknown option %c", *arg);
 			} else {
 				*rtr = true;
 			}
 			break;
 		case 'e':
 			if (ext == NULL) {
 				shell_error(shell, "unknown option %c", *arg);
 			} else {
 				*ext = true;
 			}
 			break;
 		default:
 			shell_error(shell, "unknown option %c", *arg);
 			return -EINVAL;
 		}
 	}

 	return ++pos;
 }

 static inline int read_bitrate(const struct shell *shell, int pos, char **argv,
 			       uint32_t *bitrate)
 {
 	char *end_ptr;
 	long val;

 	val = strtol(argv[pos], &end_ptr, 0);
 	if (*end_ptr != '\0') {
 		shell_error(shell, "bitrate is not a number");
 		return -EINVAL;
 	}

 	*bitrate = (uint32_t)val;

 	return ++pos;
 }

 static inline int read_id(const struct shell *shell, int pos, char **argv,
 			  bool ext, uint32_t *id)
 {
 	char *end_ptr;
 	long val;

 	val = strtol(argv[pos], &end_ptr, 0);
 	if (*end_ptr != '\0') {
 		shell_error(shell, "id is not a number");
 		return -EINVAL;
 	}

 	if (val < 0 || val > CAN_EXT_ID_MASK ||
 	   (!ext && val > CAN_MAX_STD_ID)) {
 		shell_error(shell, "Id invalid. %sid must not be negative or "
 				   "bigger than 0x%x",
 				   ext ? "ext " : "",
 				   ext ? CAN_EXT_ID_MASK : CAN_MAX_STD_ID);
 		return -EINVAL;
 	}

 	*id = (uint32_t)val;

 	return ++pos;
 }

 static inline int read_mask(const struct shell *shell, int pos, char **argv,
 			  bool ext, uint32_t *mask)
 {
 	char *end_ptr;
 	long val;

 	val = strtol(argv[pos], &end_ptr, 0);
 	if (*end_ptr != '\0') {
 		shell_error(shell, "Mask is not a number");
 		return -EINVAL;
 	}

 	if (val < 0 || val > CAN_EXT_ID_MASK ||
 	   (!ext && val > CAN_MAX_STD_ID)) {
 		shell_error(shell, "Mask invalid. %smask must not be negative "
 				   "or bigger than 0x%x",
 				   ext ? "ext " : "",
 				   ext ? CAN_EXT_ID_MASK : CAN_MAX_STD_ID);
 		return -EINVAL;
 	}

 	*mask = (uint32_t)val;

 	return ++pos;
 }

 static inline int read_data(const struct shell *shell, int pos, char **argv,
 			    size_t argc, uint8_t *data, uint8_t *dlc)
 {
 	int i;
 	uint8_t *data_ptr = data;

 	if (argc - pos > CAN_MAX_DLC) {
 		shell_error(shell, "Too many databytes. Max is %d",
 			    CAN_MAX_DLC);
 		return -EINVAL;
 	}

 	for (i = pos; i < argc; i++) {
 		char *end_ptr;
 		long val;

 		val = strtol(argv[i], &end_ptr, 0);
 		if (*end_ptr != '\0') {
 			shell_error(shell, "Data bytes must be numbers");
 			return -EINVAL;
 		}

 		if (val & ~0xFFL) {
 			shell_error(shell, "A data bytes must not be > 0xFF");
 			return -EINVAL;
 		}

 		*data_ptr = val;
 		data_ptr++;
 	}

 	*dlc = i - pos;

 	return i;
 }

 static void print_frame(struct zcan_frame *frame, void *arg)
 {
 	const struct shell *shell = (const struct shell *)arg;

 	shell_fprintf(shell, SHELL_NORMAL, "|0x%-8x|%s|%s|%d|",
 		      frame->id_type == CAN_STANDARD_IDENTIFIER ?
 				frame->std_id : frame->ext_id,
 		      frame->id_type == CAN_STANDARD_IDENTIFIER ? "std" : "ext",
 		      frame->rtr ? "RTR" : "   ", frame->dlc);

 	for (int i = 0; i < CAN_MAX_DLEN; i++) {
 		if (i < frame->dlc) {
 			shell_fprintf(shell, SHELL_NORMAL, " 0x%02x",
 				      frame->data[i]);
 		} else {
 			shell_fprintf(shell, SHELL_NORMAL, "     ");
 		}
 	}

 	shell_fprintf(shell, SHELL_NORMAL, "|\n");
 }

 static int cmd_config(const struct shell *shell, size_t argc, char **argv)
 {
 	const struct device *can_dev;
 	int pos = 1;
 	bool silent = false, loopback = false;
 	enum can_mode mode;
 	uint32_t bitrate;
 	int ret;

 	can_dev = device_get_binding(argv[pos]);
 	if (!can_dev) {
 		shell_error(shell, "Can't get binding to device \"%s\"",
 			    argv[pos]);
 		return -EINVAL;
 	}

 	pos++;

 	pos = read_config_options(shell, pos, argv, &silent, &loopback);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	if (silent && loopback) {
 		mode = CAN_SILENT_LOOPBACK_MODE;
 	} else if (silent) {
 		mode = CAN_SILENT_MODE;
 	} else if (loopback) {
 		mode = CAN_LOOPBACK_MODE;
 	} else {
 		mode = CAN_NORMAL_MODE;
 	}

 	pos = read_bitrate(shell, pos, argv, &bitrate);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	ret = can_configure(can_dev, mode, bitrate);
 	if (ret) {
 		shell_error(shell, "Failed to configure CAN controller [%d]",
 			    ret);
 		return ret;
 	}

 	return 0;
 }

 static int cmd_send(const struct shell *shell, size_t argc, char **argv)
 {
 	const struct device *can_dev;
 	int pos = 1;
 	bool rtr = false, ext = false;
 	struct zcan_frame frame;
 	int ret;
 	uint32_t id;

 	can_dev = device_get_binding(argv[pos]);
 	if (!can_dev) {
 		shell_error(shell, "Can't get binding to device \"%s\"",
 			    argv[pos]);
 		return -EINVAL;
 	}

 	pos++;

 	pos = read_frame_options(shell, pos, argv, &rtr, &ext);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	frame.id_type = ext ? CAN_EXTENDED_IDENTIFIER : CAN_STANDARD_IDENTIFIER;
 	frame.rtr = rtr ? CAN_REMOTEREQUEST : CAN_DATAFRAME;

 	pos = read_id(shell, pos, argv, ext, &id);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	frame.ext_id = id;

 	pos = read_data(shell, pos, argv, argc, frame.data, &frame.dlc);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	shell_print(shell, "Send frame with ID 0x%x (%s id) and %d data bytes",
 		    ext ? frame.ext_id : frame.std_id,
 		    ext ? "extended" : "standard", frame.dlc);

 	ret = can_send(can_dev, &frame, K_FOREVER, NULL, NULL);
 	if (ret) {
 		shell_error(shell, "Failed to send frame [%d]", ret);
 		return -EIO;
 	}

 	return 0;
 }

 static int cmd_attach(const struct shell *shell, size_t argc, char **argv)
 {
 	const struct device *can_dev;
 	int pos = 1;
 	bool rtr = false, ext = false, rtr_mask = false;
 	struct zcan_filter filter;
 	int ret;
 	uint32_t id, mask;

 	can_dev = device_get_binding(argv[pos]);
 	if (!can_dev) {
 		shell_error(shell, "Can't get binding to device \"%s\"",
 			    argv[pos]);
 		return -EINVAL;
 	}

 	pos++;

 	pos = read_frame_options(shell, pos, argv, &rtr, &ext);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	filter.id_type = ext ? CAN_EXTENDED_IDENTIFIER : CAN_STANDARD_IDENTIFIER;
 	filter.rtr = rtr ? CAN_REMOTEREQUEST : CAN_DATAFRAME;

 	pos = read_id(shell, pos, argv, ext, &id);
 	if (pos < 0) {
 		return -EINVAL;
 	}

 	filter.ext_id = id;

 	if (pos != argc) {
 		pos = read_mask(shell, pos, argv, ext, &mask);
 		if (pos < 0) {
 			return -EINVAL;
 		}
 		filter.ext_id_mask = mask;
 	} else {
 		filter.ext_id_mask = ext ? CAN_EXT_ID_MASK : CAN_STD_ID_MASK;
 	}

 	if (pos != argc) {
 		pos = read_frame_options(shell, pos, argv, &rtr_mask, NULL);
 		if (pos < 0) {
 			return -EINVAL;
 		}
 	}

 	filter.rtr_mask = rtr_mask;

 	shell_print(shell, "Attach filter with ID 0x%x (%s id) and mask 0x%x "
 			   " RTR: %d",
 		    ext ? filter.ext_id : filter.std_id,
 		    ext ? "extended" : "standard",
 		    ext ? filter.ext_id_mask : filter.std_id_mask,
 		    filter.rtr_mask);

 	ret = can_attach_workq(can_dev, &k_sys_work_q, &work, print_frame,
 			       (void *)shell, &filter);
 	if (ret < 0) {
 		if (ret == CAN_NO_FREE_FILTER) {
 			shell_error(shell, "Can't attach, no free filter left");
 		} else {
 			shell_error(shell, "Failed to attach filter [%d]", ret);
 		}

 		return -EIO;
 	}

 	shell_print(shell, "Filter ID: %d", ret);

 	return 0;
 }

 static int cmd_detach(const struct shell *shell, size_t argc, char **argv)
 {
 	const struct device *can_dev;
 	char *end_ptr;
 	long id;

 	can_dev = device_get_binding(argv[1]);
 	if (!can_dev) {
 		shell_error(shell, "Can't get binding to device \"%s\"",
 			    argv[1]);
 		return -EINVAL;
 	}


 	id = strtol(argv[2], &end_ptr, 0);
 	if (*end_ptr != '\0') {
 		shell_error(shell, "filter_id is not a number");
 		return -EINVAL;
 	}

 	if (id < 0) {
 		shell_error(shell, "filter_id must not be negative");
 	}

 	can_detach(can_dev, (int)id);

 	return 0;
 }

 SHELL_STATIC_SUBCMD_SET_CREATE(sub_can,
 	SHELL_CMD_ARG(config, NULL,
 		      "Configure CAN controller.\n"
 		      " Usage: config device_name [-sl] bitrate\n"
 		      " -s Silent mode\n"
 		      " -l Listen-only mode",
 		      cmd_config, 3, 1),
 	SHELL_CMD_ARG(send, NULL,
 		      "Send a CAN frame.\n"
 		      " Usage: send device_name [-re] id [byte_1 byte_2 ...]\n"
 		      " -r Remote transmission request\n"
 		      " -e Extended address",
 		      cmd_send, 3, 12),
 	SHELL_CMD_ARG(attach, NULL,
 		      "Attach a message filter and print those messages.\n"
 		      " Usage: attach device_name [-re] id [mask [-r]]\n"
 		      " -r Remote transmission request\n"
 		      " -e Extended address",
 		      cmd_attach, 3, 3),
 	SHELL_CMD_ARG(detach, NULL,
 		      "Detach the filter and stop receiving those messages\n"
 		      " Usage: detach device_name filter_id",
 		      cmd_detach, 3, 0),
 	SHELL_SUBCMD_SET_END /* Array terminated. */
 );

 SHELL_CMD_ARG_REGISTER(canbus, &sub_can, "CAN commands", NULL, 2, 0);
	/*
	* Copyright (c) 2019 Alexander Wachter
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#include <sys/printk.h>
	#include <shell/shell.h>
	#include <drivers/can.h>
	#include <zephyr/types.h>
	#include <stdlib.h>

	static struct zcan_work work;

	static inline int read_config_options(const struct shell *shell, int pos,
	char *argv, bool silent, bool *loopback)
	{
	char *arg = argv[pos];

	if (arg[0] != '-') {
	return pos;
	}

	for (arg = &arg[1]; *arg; arg++) {
	switch (*arg) {
	case 's':
	if (silent == NULL) {
	shell_error(shell, "unknown option %c", *arg);
	} else {
	*silent = true;
	}
	break;
	case 'l':
	if (loopback == NULL) {
	shell_error(shell, "unknown option %c", *arg);
	} else {
	*loopback = true;
	}
	break;
	default:
	shell_error(shell, "unknown option %c", *arg);
	return -EINVAL;
	}
	}

	return ++pos;
	}

	static inline int read_frame_options(const struct shell *shell, int pos,
	char *argv, bool rtr, bool *ext)
	{
	char *arg = argv[pos];

	if (arg[0] != '-') {
	return pos;
	}

	for (arg = &arg[1]; *arg; arg++) {
	switch (*arg) {
	case 'r':
	if (rtr == NULL) {
	shell_error(shell, "unknown option %c", *arg);
	} else {
	*rtr = true;
	}
	break;
	case 'e':
	if (ext == NULL) {
	shell_error(shell, "unknown option %c", *arg);
	} else {
	*ext = true;
	}
	break;
	default:
	shell_error(shell, "unknown option %c", *arg);
	return -EINVAL;
	}
	}

	return ++pos;
	}

	static inline int read_bitrate(const struct shell shell, int pos, char *argv,
	uint32_t *bitrate)
	{
	char *end_ptr;
	long val;

	val = strtol(argv[pos], &end_ptr, 0);
	if (*end_ptr != '\0') {
	shell_error(shell, "bitrate is not a number");
	return -EINVAL;
	}

	*bitrate = (uint32_t)val;

	return ++pos;
	}

	static inline int read_id(const struct shell shell, int pos, char *argv,
	bool ext, uint32_t *id)
	{
	char *end_ptr;
	long val;

	val = strtol(argv[pos], &end_ptr, 0);
	if (*end_ptr != '\0') {
	shell_error(shell, "id is not a number");
	return -EINVAL;
	}

	if (val < 0 \|\| val > CAN_EXT_ID_MASK \|\|
	(!ext && val > CAN_MAX_STD_ID)) {
	shell_error(shell, "Id invalid. %sid must not be negative or "
	"bigger than 0x%x",
	ext ? "ext " : "",
	ext ? CAN_EXT_ID_MASK : CAN_MAX_STD_ID);
	return -EINVAL;
	}

	*id = (uint32_t)val;

	return ++pos;
	}

	static inline int read_mask(const struct shell shell, int pos, char *argv,
	bool ext, uint32_t *mask)
	{
	char *end_ptr;
	long val;

	val = strtol(argv[pos], &end_ptr, 0);
	if (*end_ptr != '\0') {
	shell_error(shell, "Mask is not a number");
	return -EINVAL;
	}

	if (val < 0 \|\| val > CAN_EXT_ID_MASK \|\|
	(!ext && val > CAN_MAX_STD_ID)) {
	shell_error(shell, "Mask invalid. %smask must not be negative "
	"or bigger than 0x%x",
	ext ? "ext " : "",
	ext ? CAN_EXT_ID_MASK : CAN_MAX_STD_ID);
	return -EINVAL;
	}

	*mask = (uint32_t)val;

	return ++pos;
	}

	static inline int read_data(const struct shell shell, int pos, char *argv,
	size_t argc, uint8_t data, uint8_t dlc)
	{
	int i;
	uint8_t *data_ptr = data;

	if (argc - pos > CAN_MAX_DLC) {
	shell_error(shell, "Too many databytes. Max is %d",
	CAN_MAX_DLC);
	return -EINVAL;
	}

	for (i = pos; i < argc; i++) {
	char *end_ptr;
	long val;

	val = strtol(argv[i], &end_ptr, 0);
	if (*end_ptr != '\0') {
	shell_error(shell, "Data bytes must be numbers");
	return -EINVAL;
	}

	if (val & ~0xFFL) {
	shell_error(shell, "A data bytes must not be > 0xFF");
	return -EINVAL;
	}

	*data_ptr = val;
	data_ptr++;
	}

	*dlc = i - pos;

	return i;
	}

	static void print_frame(struct zcan_frame frame, void arg)
	{
	const struct shell shell = (const struct shell )arg;

	shell_fprintf(shell, SHELL_NORMAL, "\|0x%-8x\|%s\|%s\|%d\|",
	frame->id_type == CAN_STANDARD_IDENTIFIER ?
	frame->std_id : frame->ext_id,
	frame->id_type == CAN_STANDARD_IDENTIFIER ? "std" : "ext",
	frame->rtr ? "RTR" : " ", frame->dlc);

	for (int i = 0; i < CAN_MAX_DLEN; i++) {
	if (i < frame->dlc) {
	shell_fprintf(shell, SHELL_NORMAL, " 0x%02x",
	frame->data[i]);
	} else {
	shell_fprintf(shell, SHELL_NORMAL, " ");
	}
	}

	shell_fprintf(shell, SHELL_NORMAL, "\|\n");
	}

	static int cmd_config(const struct shell shell, size_t argc, char *argv)
	{
	const struct device *can_dev;
	int pos = 1;
	bool silent = false, loopback = false;
	enum can_mode mode;
	uint32_t bitrate;
	int ret;

	can_dev = device_get_binding(argv[pos]);
	if (!can_dev) {
	shell_error(shell, "Can't get binding to device \"%s\"",
	argv[pos]);
	return -EINVAL;
	}

	pos++;

	pos = read_config_options(shell, pos, argv, &silent, &loopback);
	if (pos < 0) {
	return -EINVAL;
	}

	if (silent && loopback) {
	mode = CAN_SILENT_LOOPBACK_MODE;
	} else if (silent) {
	mode = CAN_SILENT_MODE;
	} else if (loopback) {
	mode = CAN_LOOPBACK_MODE;
	} else {
	mode = CAN_NORMAL_MODE;
	}

	pos = read_bitrate(shell, pos, argv, &bitrate);
	if (pos < 0) {
	return -EINVAL;
	}

	ret = can_configure(can_dev, mode, bitrate);
	if (ret) {
	shell_error(shell, "Failed to configure CAN controller [%d]",
	ret);
	return ret;
	}

	return 0;
	}

	static int cmd_send(const struct shell shell, size_t argc, char *argv)
	{
	const struct device *can_dev;
	int pos = 1;
	bool rtr = false, ext = false;
	struct zcan_frame frame;
	int ret;
	uint32_t id;

	can_dev = device_get_binding(argv[pos]);
	if (!can_dev) {
	shell_error(shell, "Can't get binding to device \"%s\"",
	argv[pos]);
	return -EINVAL;
	}

	pos++;

	pos = read_frame_options(shell, pos, argv, &rtr, &ext);
	if (pos < 0) {
	return -EINVAL;
	}

	frame.id_type = ext ? CAN_EXTENDED_IDENTIFIER : CAN_STANDARD_IDENTIFIER;
	frame.rtr = rtr ? CAN_REMOTEREQUEST : CAN_DATAFRAME;

	pos = read_id(shell, pos, argv, ext, &id);
	if (pos < 0) {
	return -EINVAL;
	}

	frame.ext_id = id;

	pos = read_data(shell, pos, argv, argc, frame.data, &frame.dlc);
	if (pos < 0) {
	return -EINVAL;
	}

	shell_print(shell, "Send frame with ID 0x%x (%s id) and %d data bytes",
	ext ? frame.ext_id : frame.std_id,
	ext ? "extended" : "standard", frame.dlc);

	ret = can_send(can_dev, &frame, K_FOREVER, NULL, NULL);
	if (ret) {
	shell_error(shell, "Failed to send frame [%d]", ret);
	return -EIO;
	}

	return 0;
	}

	static int cmd_attach(const struct shell shell, size_t argc, char *argv)
	{
	const struct device *can_dev;
	int pos = 1;
	bool rtr = false, ext = false, rtr_mask = false;
	struct zcan_filter filter;
	int ret;
	uint32_t id, mask;

	can_dev = device_get_binding(argv[pos]);
	if (!can_dev) {
	shell_error(shell, "Can't get binding to device \"%s\"",
	argv[pos]);
	return -EINVAL;
	}

	pos++;

	pos = read_frame_options(shell, pos, argv, &rtr, &ext);
	if (pos < 0) {
	return -EINVAL;
	}

	filter.id_type = ext ? CAN_EXTENDED_IDENTIFIER : CAN_STANDARD_IDENTIFIER;
	filter.rtr = rtr ? CAN_REMOTEREQUEST : CAN_DATAFRAME;

	pos = read_id(shell, pos, argv, ext, &id);
	if (pos < 0) {
	return -EINVAL;
	}

	filter.ext_id = id;

	if (pos != argc) {
	pos = read_mask(shell, pos, argv, ext, &mask);
	if (pos < 0) {
	return -EINVAL;
	}
	filter.ext_id_mask = mask;
	} else {
	filter.ext_id_mask = ext ? CAN_EXT_ID_MASK : CAN_STD_ID_MASK;
	}

	if (pos != argc) {
	pos = read_frame_options(shell, pos, argv, &rtr_mask, NULL);
	if (pos < 0) {
	return -EINVAL;
	}
	}

	filter.rtr_mask = rtr_mask;

	shell_print(shell, "Attach filter with ID 0x%x (%s id) and mask 0x%x "
	" RTR: %d",
	ext ? filter.ext_id : filter.std_id,
	ext ? "extended" : "standard",
	ext ? filter.ext_id_mask : filter.std_id_mask,
	filter.rtr_mask);

	ret = can_attach_workq(can_dev, &k_sys_work_q, &work, print_frame,
	(void *)shell, &filter);
	if (ret < 0) {
	if (ret == CAN_NO_FREE_FILTER) {
	shell_error(shell, "Can't attach, no free filter left");
	} else {
	shell_error(shell, "Failed to attach filter [%d]", ret);
	}

	return -EIO;
	}

	shell_print(shell, "Filter ID: %d", ret);

	return 0;
	}

	static int cmd_detach(const struct shell shell, size_t argc, char *argv)
	{
	const struct device *can_dev;
	char *end_ptr;
	long id;

	can_dev = device_get_binding(argv[1]);
	if (!can_dev) {
	shell_error(shell, "Can't get binding to device \"%s\"",
	argv[1]);
	return -EINVAL;
	}



	id = strtol(argv[2], &end_ptr, 0);
	if (*end_ptr != '\0') {
	shell_error(shell, "filter_id is not a number");
	return -EINVAL;
	}

	if (id < 0) {
	shell_error(shell, "filter_id must not be negative");
	}

	can_detach(can_dev, (int)id);

	return 0;
	}

	SHELL_STATIC_SUBCMD_SET_CREATE(sub_can,
	SHELL_CMD_ARG(config, NULL,
	"Configure CAN controller.\n"
	" Usage: config device_name [-sl] bitrate\n"
	" -s Silent mode\n"
	" -l Listen-only mode",
	cmd_config, 3, 1),
	SHELL_CMD_ARG(send, NULL,
	"Send a CAN frame.\n"
	" Usage: send device_name [-re] id [byte_1 byte_2 ...]\n"
	" -r Remote transmission request\n"
	" -e Extended address",
	cmd_send, 3, 12),
	SHELL_CMD_ARG(attach, NULL,
	"Attach a message filter and print those messages.\n"
	" Usage: attach device_name [-re] id [mask [-r]]\n"
	" -r Remote transmission request\n"
	" -e Extended address",
	cmd_attach, 3, 3),
	SHELL_CMD_ARG(detach, NULL,
	"Detach the filter and stop receiving those messages\n"
	" Usage: detach device_name filter_id",
	cmd_detach, 3, 0),
	SHELL_SUBCMD_SET_END /* Array terminated. */
	);

	SHELL_CMD_ARG_REGISTER(canbus, &sub_can, "CAN commands", NULL, 2, 0);