1 //==========================================================================
5 // Test CAN device drivers
7 //==========================================================================
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39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): Uwe Kindler
44 // Contributors: Uwe Kindler
46 // Description: Simple read/write test of CAN 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 // tx event support required
73 #if defined(CYGOPT_IO_CAN_TX_EVENT_SUPPORT)
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 //===========================================================================
102 //===========================================================================
103 void can0_thread(cyg_addrword_t data)
105 cyg_io_handle_t hCAN0;
108 cyg_can_buf_info_t buf_info;
109 cyg_can_event rx_event;
110 cyg_can_message tx_msg =
112 0x000, // CAN identifier
115 {0x00, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7 }// 8 data bytes
117 CYGNUM_CAN_ID_STD, // standard frame
118 CYGNUM_CAN_FRAME_DATA, // data frame
119 1, // data length code
122 if (ENOERR != cyg_io_lookup("/dev/can0", &hCAN0))
124 CYG_TEST_FAIL_FINISH("Error opening /dev/can0");
127 len = sizeof(buf_info);
128 if (ENOERR != cyg_io_get_config(hCAN0, CYG_IO_GET_CONFIG_CAN_BUFFER_INFO ,&buf_info, &len))
130 CYG_TEST_FAIL_FINISH("Error reading config of /dev/can0");
133 if (buf_info.rx_count > 0)
135 CYG_TEST_FAIL_FINISH("Empty RX buffer expected for /dev/can0");
139 // now we send exactly one CAN message more than it is space in left in buffer
140 // Because each TX message will cause a TX event in receive queue we should
141 // get a RX queue overrun
143 diag_printf("Sending %d CAN messages to /dev/can0\n", buf_info.rx_bufsize + 1);
144 for (i = 0; i <= buf_info.rx_bufsize; ++i)
146 CYG_CAN_MSG_SET_STD_ID(tx_msg, 0x000 + i);
147 CYG_CAN_MSG_SET_DATA(tx_msg, 0, i);
148 len = sizeof(tx_msg);
150 if (ENOERR != cyg_io_write(hCAN0, &tx_msg, &len))
152 CYG_TEST_FAIL_FINISH("Error writing to /dev/can0");
156 print_can_msg(&tx_msg, "");
161 // Give the loop back driver time to process all those messages.
163 cyg_thread_delay(10);
166 // now check if receive queue is completely filled - that means number of rx events should
167 // be equal to RX queue size
169 if (ENOERR != cyg_io_get_config(hCAN0, CYG_IO_GET_CONFIG_CAN_BUFFER_INFO ,&buf_info, &len))
171 CYG_TEST_FAIL_FINISH("Error reading config of /dev/can0");
174 if (buf_info.rx_bufsize != buf_info.rx_count)
176 CYG_TEST_FAIL_FINISH("Number of events in /dev/can0 RX queue differs from queue size");
180 // Now read all events from receive queue - if everything is o.k. than the oldest
181 // event should be overwritten by the latest sent message and the last event in
182 // queue should indicate a RX overrun
184 diag_printf("\nReceiving %d CAN messages from /dev/can0\n", buf_info.rx_bufsize);
185 for (i = 0; i < buf_info.rx_bufsize; ++i)
187 len = sizeof(rx_event);
189 if (ENOERR != cyg_io_read(hCAN0, &rx_event, &len))
191 CYG_TEST_FAIL_FINISH("Error reading from /dev/can1");
196 // if we received a valid TX event then we can print the message
198 if (rx_event.flags & CYGNUM_CAN_EVENT_TX)
200 print_can_msg(&rx_event.msg, "");
201 if (rx_event.msg.data.bytes[0] != (i + 1))
203 CYG_TEST_FAIL_FINISH("Received /dev/can0 TX event contains invalid data");
208 CYG_TEST_FAIL_FINISH("Unexpected CAN event for /dev/can0");
212 // now check if any other flag is set
214 if (rx_event.flags & CYGNUM_CAN_EVENT_OVERRUN_RX)
216 diag_printf("RX queue overrun successfully indicated for /dev/can0\n");
217 if (i < (buf_info.rx_bufsize - 1))
219 CYG_TEST_FAIL_FINISH("RX queue overrun occured too early /dev/can0");
223 CYG_TEST_PASS_FINISH("can_overrun1 test OK");
225 } // if (rx_event.flags & CYGNUM_CAN_EVENT_OVERRUN_RX)
227 } // for (i = 0; i < buf_info.rx_bufsize; ++i)
229 CYG_TEST_FAIL_FINISH("RX overrun expected but not received for /dev/can0");
240 // create the two threads which access the CAN device driver
242 cyg_thread_create(4, can0_thread,
245 (void *) can0_thread_data.stack,
247 &can0_thread_data.hdl,
248 &can0_thread_data.obj);
250 cyg_thread_resume(can0_thread_data.hdl);
252 cyg_scheduler_start();
255 #else // CYGOPT_IO_CAN_TX_EVENT_SUPPORT
256 #define N_A_MSG "TX event support required for IO/CAN"
259 #else // CYGFUN_KERNEL_API_C
260 #define N_A_MSG "Needs kernel C API"
263 #else // CYGPKG_IO_CAN && CYGPKG_KERNEL
264 #define N_A_MSG "Needs IO/CAN and Kernel"
272 CYG_TEST_NA( N_A_MSG);