1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/* serial_test.c
Read/write data via serial I/O
This program is distributed under the GPL, version 2
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <signal.h>
#include <ftdi.h>
static int exitRequested = 0;
/*
* sigintHandler --
*
* SIGINT handler, so we can gracefully exit when the user hits ctrl-C.
*/
static void
sigintHandler(int signum)
{
exitRequested = 1;
}
int main(int argc, char **argv)
{
struct ftdi_context *ftdi;
unsigned char buf[1024];
int f = 0, i;
int vid = 0x403;
int pid = 0;
int baudrate = 115200;
int interface = INTERFACE_ANY;
int do_write = 0;
unsigned int pattern = 0xffff;
int retval = EXIT_FAILURE;
while ((i = getopt(argc, argv, "i:v:p:b:w::")) != -1)
{
switch (i)
{
case 'i': // 0=ANY, 1=A, 2=B, 3=C, 4=D
interface = strtoul(optarg, NULL, 0);
break;
case 'v':
vid = strtoul(optarg, NULL, 0);
break;
case 'p':
pid = strtoul(optarg, NULL, 0);
break;
case 'b':
baudrate = strtoul(optarg, NULL, 0);
break;
case 'w':
do_write = 1;
if (optarg)
pattern = strtoul(optarg, NULL, 0);
if (pattern > 0xff)
{
fprintf(stderr, "Please provide a 8 bit pattern\n");
exit(-1);
}
break;
default:
fprintf(stderr, "usage: %s [-i interface] [-v vid] [-p pid] [-b baudrate] [-w [pattern]]\n", *argv);
exit(-1);
}
}
// Init
if ((ftdi = ftdi_new()) == 0)
{
fprintf(stderr, "ftdi_new failed\n");
return EXIT_FAILURE;
}
if (!vid && !pid && (interface == INTERFACE_ANY))
{
ftdi_set_interface(ftdi, INTERFACE_ANY);
struct ftdi_device_list *devlist;
int res;
if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0)
{
fprintf(stderr, "No FTDI with default VID/PID found\n");
goto do_deinit;
}
if (res == 1)
{
f = ftdi_usb_open_dev(ftdi, devlist[0].dev);
if (f<0)
{
fprintf(stderr, "Unable to open device %d: (%s)",
i, ftdi_get_error_string(ftdi));
}
}
ftdi_list_free(&devlist);
if (res > 1)
{
fprintf(stderr, "%d Devices found, please select Device with VID/PID\n", res);
/* TODO: List Devices*/
goto do_deinit;
}
if (res == 0)
{
fprintf(stderr, "No Devices found with default VID/PID\n");
goto do_deinit;
}
}
else
{
// Select interface
ftdi_set_interface(ftdi, interface);
// Open device
f = ftdi_usb_open(ftdi, vid, pid);
}
if (f < 0)
{
fprintf(stderr, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(ftdi));
exit(-1);
}
// Set baudrate
f = ftdi_set_baudrate(ftdi, baudrate);
if (f < 0)
{
fprintf(stderr, "unable to set baudrate: %d (%s)\n", f, ftdi_get_error_string(ftdi));
exit(-1);
}
/* Set line parameters
*
* TODO: Make these parameters settable from the command line
*
* Parameters are choosen that sending a continous stream of 0x55
* should give a square wave
*
*/
f = ftdi_set_line_property(ftdi, 8, STOP_BIT_1, NONE);
if (f < 0)
{
fprintf(stderr, "unable to set line parameters: %d (%s)\n", f, ftdi_get_error_string(ftdi));
exit(-1);
}
if (do_write)
for(i=0; i<1024; i++)
buf[i] = pattern;
signal(SIGINT, sigintHandler);
while (!exitRequested)
{
if (do_write)
f = ftdi_write_data(ftdi, buf,
(baudrate/512 >sizeof(buf))?sizeof(buf):
(baudrate/512)?baudrate/512:1);
else
f = ftdi_read_data(ftdi, buf, sizeof(buf));
if (f<0)
sleep(1);
else if(f> 0 && !do_write)
{
fprintf(stderr, "read %d bytes\n", f);
fwrite(buf, f, 1, stdout);
fflush(stderr);
fflush(stdout);
}
}
signal(SIGINT, SIG_DFL);
retval = EXIT_SUCCESS;
ftdi_usb_close(ftdi);
do_deinit:
ftdi_free(ftdi);
return retval;
}
|
