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| code:sub2r-lib [2022/08/30 18:45] – [Sample code] Igor Yefmov | code:sub2r-lib [2022/08/30 18:48] – [UFix_8_8] Igor Yefmov |
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| | <code c++>m_rollingbar</code> | enable/disable a rolling bar, only valid when ''m_mode == color_bar'' | | | <code c++>m_rollingbar</code> | enable/disable a rolling bar, only valid when ''m_mode == color_bar'' | |
| | <code c++>m_enabled</code> | enable/disable the test pattern mode | | | <code c++>m_enabled</code> | enable/disable the test pattern mode | |
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| ==== UFix_8_8 ==== | |
| {{ :code:class-ufix_8_8.png?nolink|Class diagram - UFix_8_8}} | |
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| A helper class for working with a 2-byte floating number format used to specify fractional parameters for the FX3. More details are available in [[code:numberformats#ufix_88|UFIX 8.8 documentation]]. | |
| |
| ^ Method ^ Signature ^ Functionality ^ | |
| | ''constructor'' | <code c++>constexpr | |
| UFix_8_8( | |
| uint8_t _i | |
| , uint8_t _f = 0 | |
| ) noexcept</code> | construct a number from provided integer (''_i'') and fractional (''_f'') parts, for example: <code c++>auto uf88{1, 128}; // uf88 is now 1.5</code>No validation is performed to make sure the ''_f'' is in range [''0''..''255''] | | |
| | ''constructor'' | <code c++>constexpr | |
| UFix_8_8(double _d) | |
| noexcept;</code> | construct from a floating-point number, i.e.: <code c++>auto uf88{1.2};</code> | | |
| | ''constructor'' | <code c++>UFix_8_8( | |
| gsl::span<const std::byte> _buf | |
| ) noexcept;</code> | use this constructor when you read a 2-byte ''UFix_8_8'' value from FX3 | | |
| | ''operator double'' | <code c++>constexpr | |
| operator double() const | |
| noexcept;</code> | a type conversion into a floating-point number | | |
| | ''operator uint16_t'' | <code c++>constexpr | |
| operator uint16_t() const | |
| noexcept;</code> | make 2 bytes that are ready to be written to FX3, for example:<code c++>// omitting all the error checks!!! | |
| uint8_t valI{1}, valF{128}; | |
| auto val{S2R::UFix_8_8(valI, valF)}; | |
| S2R::I2C dev; | |
| // a port to set the image adjustment auto- | |
| // functions' update interval | |
| constexpr uint8_t port{0xDF}; | |
| dev.vrCmd(port, S2R::FX3::write, val, 0); | |
| </code> | | |
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