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--- code:sub2r-lib [2022/08/30 18:48] – [UFix_8_8] Igor Yefmov
+++ code:sub2r-lib [2022/09/10 20:39] (current) – [Basic "vendor request" call] Igor Yefmov
@@ Line 11: / Line 11: @@
 ===== Basic "vendor request" call =====
+SUB2r API calls are implemented as USB "vendor request" commands, where ''USB_SETUP_PACKET::bmRequest::Type'' is set to ''2'', following the USB specification.
 Sample usage:
@@ Line 19: / Line 21: @@
     array<std::byte, 4> vi{};
     const auto rc{m_fx3.vrCmd(Fx3Cmd::fx3_version // vendor request command
-                              , VrCmdOpType::read // read from device
+                            , VrCmdOpType::read   // read from device
-                              , 0                 // "value"
+                            , 0                   // "value"
-                              , 0                 // "index"
+                            , 0                   // "index"
-                              , vi)};             // buffer to read into
+                            , vi)};               // buffer to read into
     return vi;                                    // 32 bits of the "version info" (4 bytes)
 }