6 * lib.h - library include for command line tools
8 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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20 * may be used to endorse or promote products derived from this software
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24 * software may be distributed under the terms of the GNU General
25 * Public License ("GPL") version 2, in which case the provisions of the
26 * GPL apply INSTEAD OF those given above.
28 * The provided data structures and external interfaces from this code
29 * are not restricted to be used by modules with a GPL compatible license.
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
41 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
44 * Send feedback to <linux-can@vger.kernel.org>
48 unsigned char asc2nibble(char c);
50 * Returns the decimal value of a given ASCII hex character.
52 * While 0..9, a..f, A..F are valid ASCII hex characters.
53 * On invalid characters the value 16 is returned for error handling.
56 int hexstring2candata(char *arg, struct can_frame *cf);
58 * Converts a given ASCII hex string to values in the can_frame data[].
60 * A valid ASCII hex string consists of an even number of up to 16 chars.
61 * Leading zeros '00' in the ASCII hex string are interpreted.
65 * "1234" => data[0] = 0x12, data[1] = 0x34
66 * "001234" => data[0] = 0x00, data[1] = 0x12, data[2] = 0x34
70 * 1 = error (in length or the given characters are no ASCII hex characters)
72 * Remark: The not written data[] elements remain unchanged.
76 int parse_canframe(char *cs, struct can_frame *cf);
78 * Transfers a valid ASCII string decribing a CAN frame into struct can_frame.
82 * can_id can have 3 (standard frame format) or 8 (extended frame format)
85 * data has 0 to 8 hex-values that can (optionally) be seperated by '.'
89 * 123# -> standard CAN-Id = 0x123, dlc = 0
90 * 12345678# -> extended CAN-Id = 0x12345678, dlc = 0
91 * 123#R -> standard CAN-Id = 0x123, dlc = 0, RTR-frame
92 * 7A1#r -> standard CAN-Id = 0x7A1, dlc = 0, RTR-frame
94 * 123#00 -> standard CAN-Id = 0x123, dlc = 1, data[0] = 0x00
95 * 123#1122334455667788 -> standard CAN-Id = 0x123, dlc = 8
96 * 123#11.22.33.44.55.66.77.88 -> standard CAN-Id = 0x123, dlc = 8
97 * 123#11.2233.44556677.88 -> standard CAN-Id = 0x123, dlc = 8
98 * 32345678#112233 -> error frame with CAN_ERR_FLAG (0x2000000) set
100 * Simple facts on this compact ASCII CAN frame representation:
102 * - 3 digits: standard frame format
103 * - 8 digits: extendend frame format OR error frame
104 * - 8 digits with CAN_ERR_FLAG (0x2000000) set: error frame
105 * - an error frame is never a RTR frame
109 void fprint_canframe(FILE *stream , struct can_frame *cf, char *eol, int sep);
110 void sprint_canframe(char *buf , struct can_frame *cf, int sep);
112 * Creates a CAN frame hexadecimal output in compact format.
113 * The CAN data[] is seperated by '.' when sep != 0.
115 * 12345678#112233 -> exended CAN-Id = 0x12345678, dlc = 3, data, sep = 0
116 * 12345678#R -> exended CAN-Id = 0x12345678, RTR
117 * 123#11.22.33.44.55.66.77.88 -> standard CAN-Id = 0x123, dlc = 8, sep = 1
118 * 32345678#112233 -> error frame with CAN_ERR_FLAG (0x2000000) set
122 * fprint_canframe(stdout, &frame, "\n", 0); // with eol to STDOUT
123 * fprint_canframe(stderr, &frame, NULL, 0); // no eol to STDERR
127 #define CANLIB_VIEW_ASCII 0x1
128 #define CANLIB_VIEW_BINARY 0x2
129 #define CANLIB_VIEW_SWAP 0x4
130 #define CANLIB_VIEW_ERROR 0x8
132 #define SWAP_DELIMITER '`'
134 void fprint_long_canframe(FILE *stream , struct can_frame *cf, char *eol, int view);
135 void sprint_long_canframe(char *buf , struct can_frame *cf, int view);
137 * Creates a CAN frame hexadecimal output in user readable format.
139 * 12345678 [3] 11 22 33 -> exended CAN-Id = 0x12345678, dlc = 3, data
140 * 12345678 [0] remote request -> exended CAN-Id = 0x12345678, RTR
141 * 14B0DC51 [8] 4A 94 E8 2A EC 58 55 62 'J..*.XUb' -> (with ASCII output)
142 * 20001111 [7] C6 23 7B 32 69 98 3C ERRORFRAME -> (CAN_ERR_FLAG set)
146 * fprint_long_canframe(stdout, &frame, "\n", 0); // with eol to STDOUT
147 * fprint_long_canframe(stderr, &frame, NULL, 0); // no eol to STDERR
151 void snprintf_can_error_frame(char *buf, size_t len, struct can_frame *cf,
154 * Creates a CAN error frame output in user readable format.