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