2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 Sven Peter <sven@fail0verflow.com>
5 * Copyright (C) 2010 Haxx Enterprises <bushing@gmail.com>
8 * Redistribution and use in source and binary forms, with or
9 * without modification, are permitted provided that the following
12 * * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
15 * * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
23 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
29 * THE POSSIBILITY OF SUCH DAMAGE.
36 #define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN | \
37 LIBUSB_RECIPIENT_INTERFACE)
38 #define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT | \
39 LIBUSB_RECIPIENT_INTERFACE)
41 const int PACKET_CTRL_LEN = 2;
42 const int PACKET_INT_LEN = 2;
43 const int PACKET_BULK_LEN = 64;
44 const int INTERFACE = 0;
45 const int ENDPOINT_INT_IN = 0x81; /* Endpoint 0x81 address for IN */
46 const int ENDPOINT_INT_OUT = 0x01; /* Endpoint 1 address for OUT */
47 const int ENDPOINT_BULK_IN = 0x81; /* Endpoint 0x81 address for IN */
48 const int ENDPOINT_BULK_OUT = 0x02; /* Endpoint 1 address for OUT */
49 const int TIMEOUT = 5000; /* Timeout in ms */
58 static struct libusb_device_handle *g_devh = NULL;
60 int gl_write_address(libusb_device_handle *devh, unsigned int address)
62 unsigned char packet[8] = { address & 0xFF };
65 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEADDR,
66 0, packet, 1, TIMEOUT);
68 printf("%s: libusb_control_transfer returned %d\n",
73 int gl_write_data(libusb_device_handle *devh, unsigned int val)
75 unsigned char packet[8] = { val & 0xFF };
78 ret = libusb_control_transfer(devh, CTRL_OUT, 0xc, REQ_WRITEDATA,
79 0, packet, 1, TIMEOUT);
81 printf("%s: libusb_control_transfer returned %d\n",
86 int gl_read_data(libusb_device_handle *devh)
88 unsigned char packet[8] = { 0 };
91 ret = libusb_control_transfer(devh, CTRL_IN, 0xc, REQ_READDATA,
92 0, packet, 1, TIMEOUT);
94 printf("%s: libusb_control_transfer returned %d, val=%hhx\n",
95 __FUNCTION__, ret, packet[0]);
96 return (ret == 1) ? packet[0] : ret;
99 int gl_read_bulk(libusb_device_handle *devh, void *buffer, unsigned int size)
101 unsigned char packet[8] =
102 { 0, 0, 0, 0, size & 0xff, (size & 0xff00) >> 8,
103 (size & 0xff0000) >> 16, (size & 0xff000000) >> 24 };
104 int ret, transferred = 0;
106 ret = libusb_control_transfer(devh, CTRL_OUT, 0x4, REQ_READBULK,
107 0, packet, 8, TIMEOUT);
109 printf("%s: libusb_control_transfer returned %d\n",
112 ret = libusb_bulk_transfer(devh, ENDPOINT_BULK_IN, buffer, size,
113 &transferred, TIMEOUT);
115 fprintf(stderr, "Bulk read error %d\n", ret);
119 int gl_reg_write(libusb_device_handle *devh, unsigned int reg,
124 ret = gl_write_address(devh, reg);
127 ret = gl_write_data(devh, val);
131 int gl_reg_read(libusb_device_handle *devh, unsigned int reg)
135 ret = gl_write_address(devh, reg);
138 ret = gl_read_data(devh);
145 struct libusb_device **devs;
146 struct libusb_device *dev;
148 struct libusb_device_descriptor desc;
150 ret = libusb_init(NULL);
154 if (libusb_get_device_list(NULL, &devs) < 0) {
159 while ((dev = devs[i++]) != NULL) {
160 if (libusb_get_device_descriptor(dev, &desc) < 0)
163 if (desc.idVendor == vid) {
164 if (libusb_open(dev, &g_devh) < 0)
170 libusb_free_device_list(devs, 1);
177 ret = libusb_set_configuration(g_devh, 1);
183 ret = libusb_claim_interface(g_devh, 0);
199 libusb_release_interface(g_devh, 0);
200 libusb_reset_device(g_devh);
201 libusb_close(g_devh);