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1 /****************************************************************************** |
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2 * |
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3 * m i n i . c |
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4 * |
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5 * Minimal module for EtherCAT. |
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6 * |
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7 * $Id$ |
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8 * |
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9 * Copyright (C) 2006 Florian Pose, Ingenieurgemeinschaft IgH |
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10 * |
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11 * This file is part of the IgH EtherCAT Master. |
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12 * |
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13 * The IgH EtherCAT Master is free software; you can redistribute it |
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14 * and/or modify it under the terms of the GNU General Public License |
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15 * as published by the Free Software Foundation; version 2 of the License. |
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16 * |
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17 * The IgH EtherCAT Master is distributed in the hope that it will be |
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18 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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20 * GNU General Public License 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 |
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23 * along with the IgH EtherCAT Master; if not, write to the Free Software |
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24 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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25 * |
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26 *****************************************************************************/ |
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27 |
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28 #include <linux/module.h> |
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29 #include <linux/delay.h> |
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30 #include <linux/timer.h> |
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31 #include <linux/spinlock.h> |
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32 #include <linux/interrupt.h> |
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33 |
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34 #include "../include/ecrt.h" // EtherCAT realtime interface |
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35 |
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36 #define ASYNC |
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37 #define FREQUENCY 100 |
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38 |
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39 /*****************************************************************************/ |
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40 |
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41 struct timer_list timer; |
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42 |
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43 // EtherCAT |
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44 ec_master_t *master = NULL; |
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45 ec_domain_t *domain1 = NULL; |
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46 spinlock_t master_lock = SPIN_LOCK_UNLOCKED; |
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47 |
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48 // data fields |
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49 //void *r_ssi_input, *r_ssi_status, *r_4102[3]; |
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50 |
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51 // channels |
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52 uint32_t k_pos; |
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53 uint8_t k_stat; |
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54 |
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55 ec_field_init_t domain1_fields[] = { |
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56 {NULL, "3", "Beckhoff", "EL5001", "InputValue", 0}, |
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57 {NULL, "2", "Beckhoff", "EL4132", "OutputValue", 0}, |
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58 {} |
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59 }; |
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60 |
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61 /*****************************************************************************/ |
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62 |
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63 void run(unsigned long data) |
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64 { |
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65 static unsigned int counter = 0; |
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66 |
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67 spin_lock(&master_lock); |
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68 |
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69 #ifdef ASYNC |
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70 // receive |
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71 ecrt_master_async_receive(master); |
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72 ecrt_domain_process(domain1); |
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73 #else |
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74 // send and receive |
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75 ecrt_domain_queue(domain1); |
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76 ecrt_master_run(master); |
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77 ecrt_master_sync_io(master); |
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78 ecrt_domain_process(domain1); |
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79 #endif |
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80 |
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81 // process data |
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82 //k_pos = EC_READ_U32(r_ssi); |
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83 |
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84 #ifdef ASYNC |
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85 // send |
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86 ecrt_domain_queue(domain1); |
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87 ecrt_master_run(master); |
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88 ecrt_master_async_send(master); |
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89 #endif |
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90 |
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91 spin_unlock(&master_lock); |
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92 |
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93 if (counter) { |
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94 counter--; |
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95 } |
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96 else { |
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97 counter = FREQUENCY; |
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98 //printk(KERN_INFO "k_pos = %i\n", k_pos); |
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99 //printk(KERN_INFO "k_stat = 0x%02X\n", k_stat); |
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100 } |
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101 |
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102 // restart timer |
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103 timer.expires += HZ / FREQUENCY; |
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104 add_timer(&timer); |
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105 } |
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106 |
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107 /*****************************************************************************/ |
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108 |
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109 int request_lock(void *data) |
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110 { |
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111 unsigned int tries = 0; |
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112 while (1) { |
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113 if (spin_trylock(&master_lock)) { |
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114 if (tries) printk(KERN_INFO "lock: %i tries needed.\n", tries); |
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115 return 1; |
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116 } |
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117 tries++; |
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118 } |
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119 } |
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120 |
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121 /*****************************************************************************/ |
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122 |
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123 void release_lock(void *data) |
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124 { |
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125 spin_unlock(&master_lock); |
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126 } |
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127 |
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128 /*****************************************************************************/ |
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129 |
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130 int __init init_mini_module(void) |
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131 { |
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132 printk(KERN_INFO "=== Starting Minimal EtherCAT environment... ===\n"); |
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133 |
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134 if ((master = ecrt_request_master(0)) == NULL) { |
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135 printk(KERN_ERR "Requesting master 0 failed!\n"); |
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136 goto out_return; |
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137 } |
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138 |
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139 ecrt_master_callbacks(master, request_lock, release_lock, NULL); |
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140 |
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141 printk(KERN_INFO "Registering domain...\n"); |
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142 if (!(domain1 = ecrt_master_create_domain(master))) |
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143 { |
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144 printk(KERN_ERR "Domain creation failed!\n"); |
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145 goto out_release_master; |
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146 } |
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147 |
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148 printk(KERN_INFO "Registering domain fields...\n"); |
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149 if (ecrt_domain_register_field_list(domain1, domain1_fields)) { |
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150 printk(KERN_ERR "Field registration failed!\n"); |
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151 goto out_release_master; |
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152 } |
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153 |
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154 printk(KERN_INFO "Activating master...\n"); |
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155 if (ecrt_master_activate(master)) { |
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156 printk(KERN_ERR "Failed to activate master!\n"); |
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157 goto out_release_master; |
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158 } |
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159 |
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160 #if 0 |
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161 if (ecrt_master_fetch_sdo_lists(master)) { |
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162 printk(KERN_ERR "Failed to fetch SDO lists!\n"); |
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163 goto out_deactivate; |
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164 } |
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165 ecrt_master_print(master, 2); |
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166 #else |
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167 ecrt_master_print(master, 0); |
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168 #endif |
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169 |
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170 #if 0 |
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171 if (!(slave = ecrt_master_get_slave(master, "5"))) { |
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172 printk(KERN_ERR "Failed to get slave 5!\n"); |
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173 goto out_deactivate; |
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174 } |
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175 |
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176 if (ecrt_slave_sdo_write_exp8(slave, 0x4061, 1, 0) || |
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177 ecrt_slave_sdo_write_exp8(slave, 0x4061, 2, 1) || |
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178 ecrt_slave_sdo_write_exp8(slave, 0x4061, 3, 1) || |
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179 ecrt_slave_sdo_write_exp8(slave, 0x4066, 0, 0) || |
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180 ecrt_slave_sdo_write_exp8(slave, 0x4067, 0, 4) || |
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181 ecrt_slave_sdo_write_exp8(slave, 0x4068, 0, 0) || |
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182 ecrt_slave_sdo_write_exp8(slave, 0x4069, 0, 25) || |
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183 ecrt_slave_sdo_write_exp8(slave, 0x406A, 0, 25) || |
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184 ecrt_slave_sdo_write_exp8(slave, 0x406B, 0, 50)) { |
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185 printk(KERN_ERR "Failed to configure SSI slave!\n"); |
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186 goto out_deactivate; |
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187 } |
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188 #endif |
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189 |
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190 #if 0 |
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191 printk(KERN_INFO "Writing alias...\n"); |
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192 if (ecrt_slave_sdo_write_exp16(slave, 0xBEEF)) { |
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193 printk(KERN_ERR "Failed to write alias!\n"); |
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194 goto out_deactivate; |
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195 } |
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196 #endif |
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197 |
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198 #ifdef ASYNC |
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199 // send once and wait... |
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200 ecrt_master_prepare_async_io(master); |
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201 #endif |
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202 |
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203 #if 1 |
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204 if (ecrt_master_start_eoe(master)) { |
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205 printk(KERN_ERR "Failed to start EoE processing!\n"); |
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206 goto out_deactivate; |
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207 } |
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208 #endif |
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209 |
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210 printk("Starting cyclic sample thread.\n"); |
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211 init_timer(&timer); |
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212 timer.function = run; |
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213 timer.expires = jiffies + 10; |
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214 add_timer(&timer); |
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215 |
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216 printk(KERN_INFO "=== Minimal EtherCAT environment started. ===\n"); |
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217 return 0; |
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218 |
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219 #if 1 |
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220 out_deactivate: |
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221 ecrt_master_deactivate(master); |
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222 #endif |
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223 out_release_master: |
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224 ecrt_release_master(master); |
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225 out_return: |
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226 return -1; |
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227 } |
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228 |
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229 /*****************************************************************************/ |
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230 |
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231 void __exit cleanup_mini_module(void) |
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232 { |
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233 printk(KERN_INFO "=== Stopping Minimal EtherCAT environment... ===\n"); |
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234 |
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235 if (master) { |
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236 del_timer_sync(&timer); |
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237 printk(KERN_INFO "Deactivating master...\n"); |
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238 ecrt_master_deactivate(master); |
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239 ecrt_release_master(master); |
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240 } |
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241 |
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242 printk(KERN_INFO "=== Minimal EtherCAT environment stopped. ===\n"); |
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243 } |
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244 |
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245 /*****************************************************************************/ |
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246 |
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247 MODULE_LICENSE("GPL"); |
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248 MODULE_AUTHOR ("Florian Pose <fp@igh-essen.com>"); |
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249 MODULE_DESCRIPTION ("EtherCAT minimal test environment"); |
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250 |
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251 module_init(init_mini_module); |
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252 module_exit(cleanup_mini_module); |
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253 |
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254 /*****************************************************************************/ |
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255 |