// license:BSD-3-Clause // copyright-holders:Sandro Ronco /*************************************************************************** Hitachi HD44780 LCD controller ***************************************************************************/ #ifndef MAME_VIDEO_HD44780_H #define MAME_VIDEO_HD44780_H #pragma once //************************************************************************** // TYPE DEFINITIONS //************************************************************************** #define HD44780_PIXEL_UPDATE(name) void name(bitmap_ind16 &bitmap, u8 line, u8 pos, u8 y, u8 x, int state) // ======================> hd44780_device class hd44780_device : public device_t { public: typedef device_delegate pixel_update_delegate; // construction/destruction hd44780_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0); // static configuration helpers void set_lcd_size(int lines, int chars) { m_lines = lines; m_chars = chars; } template void set_pixel_update_cb(T &&... args) { m_pixel_update_cb.set(std::forward(args)...); } void set_busy_factor(float f) { m_busy_factor = f; } // it's a workaround for inaccurate busy flag emulation // device interface void write(offs_t offset, u8 data); u8 read(offs_t offset); void control_w(u8 data) { write(0, data); } u8 control_r() { return read(0); } void data_w(u8 data) { write(1, data); } u8 data_r() { return read(1); } u8 db_r(); void db_w(u8 data); DECLARE_WRITE_LINE_MEMBER(rs_w); DECLARE_WRITE_LINE_MEMBER(rw_w); DECLARE_WRITE_LINE_MEMBER(e_w); const u8 *render(); virtual uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); protected: hd44780_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock); // device-level overrides virtual void device_start() override; virtual void device_reset() override; virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override; // optional information overrides virtual const tiny_rom_entry *device_rom_region() const override; // charset enum { CHARSET_HD44780_A00, CHARSET_SED1278_0B, CHARSET_KS0066_F05 /*, CHARSET_HD44780_A01, CHARSET_HD44780_A02, CHARSET_KS0066_F00, CHARSET_KS0066_F03, CHARSET_KS0066_F04, CHARSET_KS0066_F06, CHARSET_KS0066_F59 */ }; virtual void control_write(u8 data); virtual u8 control_read(); virtual void data_write(u8 data); virtual u8 data_read(); void set_charset_type(int type); private: // internal helper void set_busy_flag(uint16_t usec); void correct_ac(); void update_ac(int direction); void update_nibble(int rs, int rw); void shift_display(int direction); void pixel_update(bitmap_ind16 &bitmap, u8 line, u8 pos, u8 y, u8 x, int state); // internal state static constexpr device_timer_id TIMER_BUSY = 0; static constexpr device_timer_id TIMER_BLINKING = 1; emu_timer * m_blink_timer; emu_timer * m_busy_timer; u8 m_lines; // number of lines u8 m_chars; // chars for line pixel_update_delegate m_pixel_update_cb; // pixel update callback float m_busy_factor; bool m_busy_flag; // busy flag u8 m_ddram[0x80]; // internal display data RAM u8 m_cgram[0x40]; // internal chargen RAM u8 const *m_cgrom; optional_region_ptr m_cgrom_region; // internal chargen ROM int m_ac; // address counter u8 m_dr; // data register u8 m_ir; // instruction register u8 m_active_ram; // DDRAM or CGRAM bool m_display_on; // display on/off bool m_cursor_on; // cursor on/off bool m_blink_on; // blink on/off bool m_shift_on; // shift on/off int m_disp_shift; // display shift int m_direction; // auto increment/decrement (-1 or +1) u8 m_data_len; // interface data length 4 or 8 bit u8 m_num_line; // number of lines u8 m_char_size; // char size 5x8 or 5x10 bool m_blink; bool m_first_cmd; int m_rs_input; int m_rw_input; u8 m_db_input; bool m_enabled; int m_rs_state; int m_rw_state; bool m_nibble; int m_charset_type; u8 m_render_buf[80 * 16]; enum { DDRAM, CGRAM }; }; // ======================> sed1278_0b_device class sed1278_0b_device : public hd44780_device { public: // construction/destruction sed1278_0b_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); }; // ======================> ks0066_f05_device class ks0066_f05_device : public hd44780_device { public: // construction/destruction ks0066_f05_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock); }; // device type definition DECLARE_DEVICE_TYPE(HD44780, hd44780_device) DECLARE_DEVICE_TYPE(SED1278_0B, sed1278_0b_device) DECLARE_DEVICE_TYPE(KS0066_F05, ks0066_f05_device) #endif // MAME_VIDEO_HD44780_H