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<p class="MsoNormal"><span style="font-size:11.0pt">Hello everyone,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The `ethercat` CLI tool implements the “Register Access” functions `reg_read` and `reg_write`. These functions are using EC_IOCTL_SLAVE_REG_READ and EC_IOCTL_SLAVE_REG_WRITE to execute these methods. (<a href="https://gitlab.com/etherlab.org/ethercat/-/blob/stable-1.6/tool/MasterDevice.cpp?ref_type=heads#L433">lines
433ff of tool/MasterDevice.cpp</a>)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Is there a reason why possibly corresponding methods for “Register Read” and “Register Write” aren’t implemented in the “normal” user mode C API (include/ecrt.h)? Don’t these methods make sense for controlling
EtherCAT slaves?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’m unfortunately not an EtherCAT expert and I’m confused about the different data objects and communication objects. Are the functions `ecrt_slave_config_create_reg_request`, `ecrt_reg_request_data`, `ecrt_reg_request_state`,
`ecrt_reg_request_write` and `ecrt_reg_request_read` related to the same “Register Access” (“Slave Registers”) as implemented by the CLI? Or do they manage a different kind of registers?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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