1 //==========================================================================
5 // Test CAN device driver timeouts
7 //==========================================================================
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40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): Uwe Kindler
44 // Contributors: Uwe Kindler
46 // Description: Timeout test of CAN device driver
47 //####DESCRIPTIONEND####
50 //===========================================================================
52 //===========================================================================
53 #include <pkgconf/system.h>
55 #include <cyg/infra/testcase.h> // test macros
56 #include <cyg/infra/cyg_ass.h> // assertion macros
57 #include <cyg/infra/diag.h>
59 // Package requirements
60 #if defined(CYGPKG_IO_CAN) && defined(CYGPKG_KERNEL)
62 #include <pkgconf/kernel.h>
63 #include <cyg/io/io.h>
64 #include <cyg/io/canio.h>
66 // Package option requirements
67 #if defined(CYGFUN_KERNEL_API_C)
69 #include <cyg/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL
70 #include <cyg/kernel/kapi.h>
72 // timeout support required
73 #if defined(CYGOPT_IO_CAN_SUPPORT_TIMEOUTS)
76 //===========================================================================
78 //===========================================================================
79 typedef struct st_thread_data
82 long stack[CYGNUM_HAL_STACK_SIZE_TYPICAL];
87 //===========================================================================
89 //===========================================================================
90 cyg_thread_entry_t can0_thread;
91 thread_data_t can0_thread_data;
94 //===========================================================================
96 //===========================================================================
97 #include "can_test_aux.inl" // include CAN test auxiliary functions
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)
105 cyg_can_event rx_event;
106 cyg_can_timeout_info_t timeout_info;
108 cyg_uint32 current_time_old;
109 cyg_uint32 current_time_new;
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))
118 CYG_TEST_FAIL_FINISH("Error writing config of /dev/can0");
121 diag_printf("read timeout: %d\n", timeout);
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
127 current_time_old = (cyg_uint32)cyg_current_time();
128 len = sizeof(rx_event);
129 if (-EINTR == cyg_io_read(hCAN, &rx_event, &len))
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;
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
140 if ((diff_time < 0) || (diff_time > 2))
142 CYG_TEST_FAIL_FINISH("Measured timeout time differs from /dev/can0 RX timeout value.");
147 CYG_TEST_FAIL_FINISH("Timeout expected for /dev/can0");
151 //===========================================================================
153 //===========================================================================
154 void can0_thread(cyg_addrword_t data)
156 cyg_io_handle_t hCAN0;
159 cyg_can_timeout_info_t timeout_info;
162 if (ENOERR != cyg_io_lookup("/dev/can0", &hCAN0))
164 CYG_TEST_FAIL_FINISH("Error opening /dev/can0");
168 // the first thing we need to do is to switch to nonblocking calls because
169 // function calls with timeout require nonblocking calls
172 len = sizeof(blocking);
173 if (ENOERR != cyg_io_set_config(hCAN0, CYG_IO_SET_CONFIG_READ_BLOCKING ,&blocking, &len))
175 CYG_TEST_FAIL_FINISH("Error changing config of /dev/can0");
179 // first we read the timeout configuration
181 len = sizeof(timeout_info);
182 if (ENOERR != cyg_io_get_config(hCAN0, CYG_IO_GET_CONFIG_CAN_TIMEOUT ,&timeout_info, &len))
184 CYG_TEST_FAIL_FINISH("Error reading config of /dev/can0");
188 // now we check the default timeout and a number of different timeout values
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);
199 CYG_TEST_PASS_FINISH("can_timeout test OK");
211 // create the thread which access the CAN device driver
213 cyg_thread_create(4, can0_thread,
216 (void *) can0_thread_data.stack,
218 &can0_thread_data.hdl,
219 &can0_thread_data.obj);
221 cyg_thread_resume(can0_thread_data.hdl);
223 cyg_scheduler_start();
226 #else // CYGOPT_IO_CAN_SUPPORT_TIMEOUTS
227 #define N_A_MSG "Timeout support required for IO/CAN"
230 #else // CYGFUN_KERNEL_API_C
231 #define N_A_MSG "Needs kernel C API"
234 #else // CYGPKG_IO_CAN && CYGPKG_KERNEL
235 #define N_A_MSG "Needs IO/CAN and Kernel"
243 CYG_TEST_NA( N_A_MSG);