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comparison packages/devs/can/loop/current/tests/can_timeout.c @ 2059:f929becf4af2

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CAN driver, from Uwe Kindler
author gthomas
date Thu, 25 Aug 2005 13:40:35 +0000
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children 1ca46bebd705
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2058:8d6df59beb34 2059:f929becf4af2
1 //==========================================================================
2 //
3 // can_timeout.c
4 //
5 // Test CAN device driver timeouts
6 //
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12 //
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
16 //
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 // for more details.
21 //
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 //
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
32 //
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
35 //
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
42 //
43 // Author(s): Uwe Kindler
44 // Contributors: Uwe Kindler
45 // Date: 2005-08-07
46 // Description: Timeout test of CAN device driver
47 //####DESCRIPTIONEND####
48
49
50 //===========================================================================
51 // INCLUDES
52 //===========================================================================
53 #include <pkgconf/system.h>
54
55 #include <cyg/infra/testcase.h> // test macros
56 #include <cyg/infra/cyg_ass.h> // assertion macros
57 #include <cyg/infra/diag.h>
58
59 // Package requirements
60 #if defined(CYGPKG_IO_CAN) && defined(CYGPKG_KERNEL)
61
62 #include <pkgconf/kernel.h>
63 #include <cyg/io/io.h>
64 #include <cyg/io/canio.h>
65
66 // Package option requirements
67 #if defined(CYGFUN_KERNEL_API_C)
68
69 #include <cyg/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL
70 #include <cyg/kernel/kapi.h>
71
72 // timeout support required
73 #if defined(CYGOPT_IO_CAN_SUPPORT_TIMEOUTS)
74
75
76 //===========================================================================
77 // DATA TYPES
78 //===========================================================================
79 typedef struct st_thread_data
80 {
81 cyg_thread obj;
82 long stack[CYGNUM_HAL_STACK_SIZE_TYPICAL];
83 cyg_handle_t hdl;
84 } thread_data_t;
85
86
87 //===========================================================================
88 // LOCAL DATA
89 //===========================================================================
90 cyg_thread_entry_t can0_thread;
91 thread_data_t can0_thread_data;
92
93
94 //===========================================================================
95 // LOCAL FUNCTIONS
96 //===========================================================================
97 #include "can_test_aux.inl" // include CAN test auxiliary functions
98
99
100 //===========================================================================
101 // Measure timeout time and compare it with RX timeout value
102 //===========================================================================
103 void check_timeout(cyg_io_handle_t hCAN, cyg_uint32 timeout)
104 {
105 cyg_can_event rx_event;
106 cyg_can_timeout_info_t timeout_info;
107 cyg_uint32 len;
108 cyg_uint32 current_time_old;
109 cyg_uint32 current_time_new;
110 cyg_int32 diff_time;
111
112
113
114 timeout_info.tx_timeout = timeout;
115 timeout_info.rx_timeout = timeout;
116 if (ENOERR != cyg_io_set_config(hCAN, CYG_IO_SET_CONFIG_CAN_TIMEOUT ,&timeout_info, &len))
117 {
118 CYG_TEST_FAIL_FINISH("Error writing config of /dev/can0");
119 }
120
121 diag_printf("read timeout: %d\n", timeout);
122
123 //
124 // if the return code is -EINTR then we know that a timout occured. Normally the
125 // receive queue should be empty so we can expect a timeout here
126 //
127 current_time_old = (cyg_uint32)cyg_current_time();
128 len = sizeof(rx_event);
129 if (-EINTR == cyg_io_read(hCAN, &rx_event, &len))
130 {
131 current_time_new = (cyg_uint32)cyg_current_time();
132 diff_time = current_time_new - current_time_old;
133 diag_printf("measured time: %d\n\n", diff_time);
134 diff_time = diff_time - timeout;
135
136 //
137 // If the measured value is smaller then the timeout value or if
138 // the difference is > 2 the we treat this as an error
139 //
140 if ((diff_time < 0) || (diff_time > 2))
141 {
142 CYG_TEST_FAIL_FINISH("Measured timeout time differs from /dev/can0 RX timeout value.");
143 }
144 }
145 else
146 {
147 CYG_TEST_FAIL_FINISH("Timeout expected for /dev/can0");
148 }
149 }
150
151 //===========================================================================
152 // WRITER THREAD
153 //===========================================================================
154 void can0_thread(cyg_addrword_t data)
155 {
156 cyg_io_handle_t hCAN0;
157 cyg_uint32 len;
158 cyg_uint32 blocking;
159 cyg_can_timeout_info_t timeout_info;
160
161
162 if (ENOERR != cyg_io_lookup("/dev/can0", &hCAN0))
163 {
164 CYG_TEST_FAIL_FINISH("Error opening /dev/can0");
165 }
166
167 //
168 // the first thing we need to do is to switch to nonblocking calls because
169 // function calls with timeout require nonblocking calls
170 //
171 blocking = 0;
172 len = sizeof(blocking);
173 if (ENOERR != cyg_io_set_config(hCAN0, CYG_IO_SET_CONFIG_READ_BLOCKING ,&blocking, &len))
174 {
175 CYG_TEST_FAIL_FINISH("Error changing config of /dev/can0");
176 }
177
178 //
179 // first we read the timeout configuration
180 //
181 len = sizeof(timeout_info);
182 if (ENOERR != cyg_io_get_config(hCAN0, CYG_IO_GET_CONFIG_CAN_TIMEOUT ,&timeout_info, &len))
183 {
184 CYG_TEST_FAIL_FINISH("Error reading config of /dev/can0");
185 }
186
187 //
188 // now we check the default timeout and a number of different timeout values
189 //
190 check_timeout(hCAN0, timeout_info.rx_timeout);
191 check_timeout(hCAN0, 10);
192 check_timeout(hCAN0, 20);
193 check_timeout(hCAN0, 50);
194 check_timeout(hCAN0, 100);
195 check_timeout(hCAN0, 200);
196 check_timeout(hCAN0, 500);
197
198
199 CYG_TEST_PASS_FINISH("can_timeout test OK");
200 }
201
202
203
204
205 void
206 cyg_start(void)
207 {
208 CYG_TEST_INIT();
209
210 //
211 // create the thread which access the CAN device driver
212 //
213 cyg_thread_create(4, can0_thread,
214 (cyg_addrword_t) 0,
215 "can0_thread",
216 (void *) can0_thread_data.stack,
217 1024 * sizeof(long),
218 &can0_thread_data.hdl,
219 &can0_thread_data.obj);
220
221 cyg_thread_resume(can0_thread_data.hdl);
222
223 cyg_scheduler_start();
224 }
225
226 #else // CYGOPT_IO_CAN_SUPPORT_TIMEOUTS
227 #define N_A_MSG "Timeout support required for IO/CAN"
228 #endif
229
230 #else // CYGFUN_KERNEL_API_C
231 #define N_A_MSG "Needs kernel C API"
232 #endif
233
234 #else // CYGPKG_IO_CAN && CYGPKG_KERNEL
235 #define N_A_MSG "Needs IO/CAN and Kernel"
236 #endif
237
238 #ifdef N_A_MSG
239 void
240 cyg_start( void )
241 {
242 CYG_TEST_INIT();
243 CYG_TEST_NA( N_A_MSG);
244 }
245 #endif // N_A_MSG
246
247 // EOF can_timeout.c