3b563be2120c803848df7cbad01cbf5f1258cee3
[proxmark3-svn] / uart / uart.h
1 /*
2 * Generic uart / rs232/ serial port library
3 *
4 * Copyright (c) 2013, Roel Verdult
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the copyright holders nor the
15 * names of its contributors may be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
19 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
22 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * @file uart.h
30 */
31
32 #ifndef _PM3_UART_H_
33 #define _PM3_UART_H_
34
35 #include <stdio.h>
36 #include <string.h>
37 #include <stdlib.h>
38
39 #include <stdint.h>
40 #include <stdbool.h>
41
42 /* Used to substitute for an example serial port path on each platform.
43 */
44 #ifdef _WIN32
45 #define SERIAL_PORT_H "com3"
46 #elif __APPLE__
47 #define SERIAL_PORT_H "/dev/tty.usbmodem*"
48 #else
49 #define SERIAL_PORT_H "/dev/ttyACM0"
50 #endif
51
52 /* serial_port is declared as a void*, which you should cast to whatever type
53 * makes sense to your connection method. Both the posix and win32
54 * implementations define their own structs in place.
55 */
56 typedef void* serial_port;
57
58 /* Returned by uart_open if the serial port specified was invalid.
59 */
60 #define INVALID_SERIAL_PORT (void*)(~1)
61
62 /* Returned by uart_open if the serial port specified is in use by another
63 * process.
64 */
65 #define CLAIMED_SERIAL_PORT (void*)(~2)
66
67 /* Given a user-specified port name, connect to the port and return a structure
68 * used for future references to that port.
69 *
70 * On errors, this method returns INVALID_SERIAL_PORT or CLAIMED_SERIAL_PORT.
71 */
72 serial_port uart_open(const char* pcPortName);
73
74 /* Closes the given port.
75 */
76 void uart_close(const serial_port sp);
77
78 /* Reads from the given serial port for up to 30ms.
79 * pbtRx: A pointer to a buffer for the returned data to be written to.
80 * pszMaxRxLen: The maximum data size we want to be sent.
81 * pszRxLen: The number of bytes that we were actually sent.
82 *
83 * Returns TRUE if any data was fetched, even if it was less than pszMaxRxLen.
84 *
85 * Returns FALSE if there was an error reading from the device. Note that a
86 * partial read may have completed into the buffer by the corresponding
87 * implementation, so pszRxLen should be checked to see if any data was written.
88 */
89 bool uart_receive(const serial_port sp, uint8_t* pbtRx, size_t pszMaxRxLen, size_t* pszRxLen);
90
91 /* Sends a buffer to a given serial port.
92 * pbtTx: A pointer to a buffer containing the data to send.
93 * szTxLen: The amount of data to be sent.
94 */
95 bool uart_send(const serial_port sp, const uint8_t* pbtTx, const size_t szTxLen);
96
97 /* Sets the current speed of the serial port, in baud.
98 */
99 bool uart_set_speed(serial_port sp, const uint32_t uiPortSpeed);
100
101 /* Gets the current speed of the serial port, in baud.
102 */
103 uint32_t uart_get_speed(const serial_port sp);
104
105 #endif // _PM3_UART_H_
106
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