#ifndef ucoo_dev_lcd_lcd_spi_hh #define ucoo_dev_lcd_lcd_spi_hh // ucoolib - Microcontroller object oriented library. {{{ // // Copyright (C) 2015 Nicolas Schodet // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the "Software"), // to deal in the Software without restriction, including without limitation // the rights to use, copy, modify, merge, publish, distribute, sublicense, // and/or sell copies of the Software, and to permit persons to whom the // Software is furnished to do so, subject to the following conditions: // // The above copyright notice and this permission notice shall be included in // all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER // DEALINGS IN THE SOFTWARE. // // }}} #include "ucoo/intf/lcd.hh" #include "ucoo/intf/spi_master.hh" #include "ucoo/intf/io.hh" // TODO: support several LCD and buses using subclassing. namespace ucoo { /// Typical character based LCD using SPI connection. class LcdSpi : public Lcd { public: /// Constructor. LcdSpi (SpiMaster &spi, Io &cs, Io &rs); /// Destructor. ~LcdSpi (); /// Enable, initialise display. void enable (); /// Disable, clear display and shutdown if possible. void disable (); /// See Lcd::puts. void puts (const char *str); /// See Lcd::go. void go (int line, int column); /// See Lcd::clear. void clear (); /// See Lcd::get_lines. int get_lines () const; /// See Lcd::get_columns. int get_columns () const; protected: /// Send commands or data to LCD. void send (const char *buf, int count, bool command = false, bool long_delay = false); private: SpiMaster &spi_; Io &cs_, &rs_; /// Number of lines, columns and current line. int lines_, columns_, cur_line_; /// Is it enabled? bool enabled_; /// SPI frequency. static const int spi_speed_hz_ = 250000; }; inline LcdSpi::LcdSpi (SpiMaster &spi, Io &cs, Io &rs) : spi_ (spi), cs_ (cs), rs_ (rs), lines_ (2), columns_ (16), cur_line_ (0), enabled_ (false) { } } // namespace ucoo #endif // ucoo_dev_lcd_lcd_spi_hh