Commit | Line | Data |
---|---|---|
e0aca3fa GE |
1 | /* baud_test.c |
2 | * | |
3 | * test setting the baudrate and compare it with the expected runtime | |
4 | * | |
5 | * options: | |
c7f06bd4 GE |
6 | * -p <devicestring> defaults to "i:0x0403:0x6001" (this is the first FT232R with default id) |
7 | * d:<devicenode> path of bus and device-node (e.g. "003/001") within usb device tree (usually at /proc/bus/usb/) | |
8 | * i:<vendor>:<product> first device with given vendor and product id, | |
9 | * ids can be decimal, octal (preceded by "0") or hex (preceded by "0x") | |
10 | * i:<vendor>:<product>:<index> as above with index being the number of the device (starting with 0) | |
11 | * if there are more than one | |
12 | * s:<vendor>:<product>:<serial> first device with given vendor id, product id and serial string | |
e0aca3fa | 13 | * -d <datasize to send in bytes> |
97834102 | 14 | * -b <baudrate> (divides by 16 if bitbang as taken from the ftdi datasheets) |
e0aca3fa | 15 | * -m <mode to use> r: serial a: async bitbang s:sync bitbang |
f44dbec2 | 16 | * -c <chunksize> |
e0aca3fa GE |
17 | * |
18 | * (C) 2009 by Gerd v. Egidy <gerd.von.egidy@intra2net.com> | |
19 | * | |
20 | * This program is free software; you can redistribute it and/or modify | |
21 | * it under the terms of the GNU General Public License as published by | |
22 | * the Free Software Foundation; either version 2 of the License, or | |
23 | * (at your option) any later version. | |
24 | ||
25 | * This program is distributed in the hope that it will be useful, | |
26 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
28 | * GNU General Public License for more details. | |
29 | * | |
30 | */ | |
31 | ||
32 | #include <sys/time.h> | |
33 | #include <stdio.h> | |
34 | #include <unistd.h> | |
35 | #include <ftdi.h> | |
36 | ||
37 | double get_prec_time() | |
38 | { | |
39 | struct timeval tv; | |
40 | double res; | |
41 | ||
42 | gettimeofday(&tv,NULL); | |
43 | ||
44 | res=tv.tv_sec; | |
45 | res+=((double)tv.tv_usec/1000000); | |
46 | ||
47 | return res; | |
48 | } | |
49 | ||
50 | int main(int argc, char **argv) | |
51 | { | |
52 | struct ftdi_context ftdic; | |
53 | int i, t; | |
f44dbec2 GE |
54 | char *txbuf; |
55 | char *rxbuf; | |
e0aca3fa GE |
56 | double start, duration, plan; |
57 | ||
58 | // default values | |
59 | int baud=9600; | |
60 | int set_baud; | |
61 | int datasize=100000; | |
c7f06bd4 GE |
62 | |
63 | char default_devicedesc[] = "i:0x0403:0x6001"; | |
64 | char *devicedesc=default_devicedesc; | |
f44dbec2 | 65 | int txchunksize=256; |
e0aca3fa GE |
66 | enum ftdi_mpsse_mode test_mode=BITMODE_BITBANG; |
67 | ||
f44dbec2 | 68 | while ((t = getopt (argc, argv, "b:d:p:m:c:")) != -1) |
e0aca3fa GE |
69 | { |
70 | switch (t) | |
71 | { | |
72 | case 'd': | |
73 | datasize = atoi (optarg); | |
74 | break; | |
75 | case 'm': | |
76 | switch(*optarg) | |
77 | { | |
78 | case 'r': | |
79 | // serial | |
80 | test_mode=BITMODE_RESET; | |
81 | break; | |
82 | case 'a': | |
83 | // async | |
84 | test_mode=BITMODE_BITBANG; | |
85 | break; | |
86 | case 's': | |
87 | // sync | |
88 | test_mode=BITMODE_SYNCBB; | |
89 | break; | |
90 | } | |
91 | break; | |
92 | case 'b': | |
93 | baud = atoi (optarg); | |
94 | break; | |
95 | case 'p': | |
c7f06bd4 | 96 | devicedesc=optarg; |
e0aca3fa | 97 | break; |
f44dbec2 GE |
98 | case 'c': |
99 | txchunksize = atoi (optarg); | |
100 | break; | |
e0aca3fa GE |
101 | } |
102 | } | |
103 | ||
f44dbec2 GE |
104 | txbuf=malloc(txchunksize); |
105 | rxbuf=malloc(txchunksize); | |
106 | if (txbuf == NULL || rxbuf == NULL) | |
107 | { | |
108 | fprintf(stderr, "can't malloc\n"); | |
109 | return EXIT_FAILURE; | |
110 | } | |
111 | ||
e0aca3fa GE |
112 | if (ftdi_init(&ftdic) < 0) |
113 | { | |
114 | fprintf(stderr, "ftdi_init failed\n"); | |
115 | return EXIT_FAILURE; | |
116 | } | |
117 | ||
c7f06bd4 | 118 | if (ftdi_usb_open_string(&ftdic, devicedesc) < 0) |
e0aca3fa GE |
119 | { |
120 | fprintf(stderr,"Can't open ftdi device: %s\n",ftdi_get_error_string(&ftdic)); | |
121 | return EXIT_FAILURE; | |
122 | } | |
123 | ||
124 | set_baud=baud; | |
125 | if (test_mode!=BITMODE_RESET) | |
126 | { | |
127 | // we do bitbang, so real baudrate / 16 | |
128 | set_baud=baud/16; | |
129 | } | |
130 | ||
131 | ftdi_set_baudrate(&ftdic,set_baud); | |
132 | printf("real baudrate used: %d\n",(test_mode==BITMODE_RESET) ? ftdic.baudrate : ftdic.baudrate*16); | |
133 | ||
134 | if (ftdi_set_bitmode(&ftdic, 0xFF,test_mode) < 0) | |
135 | { | |
136 | fprintf(stderr,"Can't set mode: %s\n",ftdi_get_error_string(&ftdic)); | |
137 | return EXIT_FAILURE; | |
138 | } | |
139 | ||
140 | if (test_mode==BITMODE_RESET) | |
141 | { | |
142 | // serial 8N1: 8 data bits, 1 startbit, 1 stopbit | |
143 | plan=((double)(datasize*10))/baud; | |
144 | } | |
145 | else | |
146 | { | |
147 | // bitbang means 8 bits at once | |
148 | plan=((double)datasize)/baud; | |
149 | } | |
150 | ||
151 | printf("this test should take %.2f seconds\n",plan); | |
152 | ||
153 | // prepare data to send: 0 and 1 bits alternating (except for serial start/stopbit): | |
154 | // maybe someone wants to look at this with a scope or logic analyzer | |
f44dbec2 | 155 | for (i=0; i<txchunksize; i++) |
e0aca3fa GE |
156 | { |
157 | if (test_mode==BITMODE_RESET) | |
158 | txbuf[i]=0xAA; | |
159 | else | |
160 | txbuf[i]=(i%2) ? 0xff : 0; | |
161 | } | |
162 | ||
f44dbec2 GE |
163 | if (ftdi_write_data_set_chunksize(&ftdic, txchunksize) < 0 || |
164 | ftdi_read_data_set_chunksize(&ftdic, txchunksize) < 0) | |
165 | { | |
166 | fprintf(stderr,"Can't set chunksize: %s\n",ftdi_get_error_string(&ftdic)); | |
167 | return EXIT_FAILURE; | |
168 | } | |
169 | ||
e0aca3fa GE |
170 | if(test_mode==BITMODE_SYNCBB) |
171 | { | |
f44dbec2 GE |
172 | // completely clear the receive buffer before beginning |
173 | while(ftdi_read_data(&ftdic, rxbuf, txchunksize)>0); | |
e0aca3fa | 174 | } |
f44dbec2 | 175 | |
e0aca3fa GE |
176 | start=get_prec_time(); |
177 | ||
ac432dd8 GE |
178 | // don't wait for more data to arrive, take what we get and keep on sending |
179 | // yes, we really would like to have libusb 1.0+ with async read/write... | |
180 | ftdic.usb_read_timeout=1; | |
181 | ||
e0aca3fa GE |
182 | i=0; |
183 | while(i < datasize) | |
184 | { | |
f44dbec2 | 185 | int sendsize=txchunksize; |
e0aca3fa GE |
186 | if (i+sendsize > datasize) |
187 | sendsize=datasize-i; | |
188 | ||
189 | if ((sendsize=ftdi_write_data(&ftdic, txbuf, sendsize)) < 0) | |
190 | { | |
191 | fprintf(stderr,"write failed at %d: %s\n", | |
192 | i, ftdi_get_error_string(&ftdic)); | |
193 | return EXIT_FAILURE; | |
194 | } | |
195 | ||
196 | i+=sendsize; | |
197 | ||
198 | if(test_mode==BITMODE_SYNCBB) | |
199 | { | |
f44dbec2 | 200 | // read the same amount of data as sent |
39c9dbfc | 201 | ftdi_read_data(&ftdic, rxbuf, sendsize); |
e0aca3fa GE |
202 | } |
203 | } | |
204 | ||
205 | duration=get_prec_time()-start; | |
39c9dbfc | 206 | printf("and took %.4f seconds, this is %.0f baud or factor %.3f\n",duration,(plan*baud)/duration,plan/duration); |
e0aca3fa GE |
207 | |
208 | ftdi_usb_close(&ftdic); | |
209 | ftdi_deinit(&ftdic); | |
210 | exit (0); | |
211 | } |