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CHG: added some comments when changing the HAS_512_FLASH macro directive.
[proxmark3-svn] / common / cmd.c
1 /*
2 * Proxmark send and receive commands
3 *
4 * Copyright (c) 2012, 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 cmd.c
30 * @brief
31 */
32
33 #include "cmd.h"
34
35 bool cmd_receive(UsbCommand* cmd) {
36
37 // Check if there is a usb packet available
38 if (!usb_poll()) return false;
39
40 // Try to retrieve the available command frame
41 size_t rxlen = usb_read((byte_t*)cmd,sizeof(UsbCommand));
42
43 // Check if the transfer was complete
44 if (rxlen != sizeof(UsbCommand)) return false;
45
46 // Received command successfully
47 return true;
48 }
49
50 bool cmd_send(uint32_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, void* data, size_t len) {
51
52 UsbCommand txcmd;
53
54 // 0x00 the whole command.
55 for (size_t i=0; i < sizeof(UsbCommand); i++)
56 ((byte_t*)&txcmd)[i] = 0x00;
57
58 // Compose the outgoing command frame
59 txcmd.cmd = cmd;
60 txcmd.arg[0] = arg0;
61 txcmd.arg[1] = arg1;
62 txcmd.arg[2] = arg2;
63
64 // Add the (optional) content to the frame, with a maximum size of USB_CMD_DATA_SIZE
65 if (data && len) {
66 len = MIN(len, USB_CMD_DATA_SIZE);
67 for (size_t i=0; i<len; i++) {
68 txcmd.d.asBytes[i] = ((byte_t*)data)[i];
69 }
70 }
71
72 // Send frame and make sure all bytes are transmitted
73 if ( usb_write( (byte_t*)&txcmd, sizeof(UsbCommand)) != 0)
74 return false;
75
76 return true;
77 }
78
79
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