BUS8.h

00001 #ifndef BUS8_H
00002 #define BUS8_H
00003 
00004 #include "mbed.h"
00005 #include "Protocols.h "
00006 //#include "GraphicsDisplay.h"
00007 
00008 /** Parallel 8bit interface
00009 */
00010 class BUS8 : public Protocols
00011 {
00012  public:
00013 
00014     /** Create a BUS8 display interface with scattered pins and 5 control pins
00015     *
00016     * @param buspins array of PinName to group as Bus
00017     * , i.e PinName buspins[8]={PC_0,PC_1,PC_2,PC_3,D9,D8,D7,D6};
00018     * @param CS pin connected to CS of display
00019     * @param reset pin connected to RESET of display
00020     * @param DC pin connected to data/command of display
00021     * @param WR pin connected to SDI of display
00022     * @param RD pin connected to RS of display 
00023     */ 
00024     BUS8(PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD);
00025 
00026 protected:
00027   
00028     /** Send 8bit command to display controller 
00029     *
00030     * @param cmd: byte to send  
00031     *
00032     */   
00033     virtual void wr_cmd8(unsigned char cmd);
00034     
00035     /** Send 8bit data to display controller 
00036     *
00037     * @param data: byte to send   
00038     *
00039     */   
00040     virtual void wr_data8(unsigned char data);
00041     
00042     /** Send 2x8bit command to display controller 
00043     *
00044     * @param cmd: halfword to send  
00045     *
00046     */   
00047     virtual void wr_cmd16(unsigned short cmd);
00048     
00049     /** Send 2x8bit data to display controller 
00050     *
00051     * @param data: halfword to send   
00052     *
00053     */   
00054     virtual void wr_data16(unsigned short data);
00055     
00056     /** Send 16bit pixeldata to display controller 
00057     *
00058     * @param data: halfword to send   
00059     *
00060     */   
00061     virtual void wr_gram(unsigned short data);
00062     
00063     /** Send same 16bit pixeldata to display controller multiple times
00064     *
00065     * @param data: halfword to send
00066     * @param count: how many
00067     *
00068     */   
00069     virtual void wr_gram(unsigned short data, unsigned int count);
00070     
00071     /** Send array of pixeldata shorts to display controller
00072     *
00073     * @param data: unsigned short pixeldata array
00074     * @param lenght: lenght (in shorts)
00075     *
00076     */   
00077     virtual void wr_grambuf(unsigned short* data, unsigned int lenght);
00078     
00079     /** Read 16bit pixeldata from display controller (with dummy cycle)
00080     *
00081     * @param convert true/false. Convert 18bit to 16bit, some controllers returns 18bit
00082     * @returns 16bit color
00083     */ 
00084     virtual unsigned short rd_gram(bool convert);
00085     
00086     /** Read 4x8bit register data (with dummy cycle)
00087     * @param reg the register to read
00088     * @returns data as uint
00089     * 
00090     */ 
00091     virtual unsigned int rd_reg_data32(unsigned char reg);
00092     
00093     /** Read 3x8bit ExtendedCommands register data
00094     * @param reg the register to read
00095     * @returns data as uint
00096     * @note EXTC regs (0xB0 to 0xFF) are read/write registers, for Parallel mode directly accessible in both directions
00097     */ 
00098     virtual unsigned int rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd);
00099     
00100     /** ILI932x specific, does a dummy read cycle, number of bits is protocol dependent
00101     * for PAR protocols: a signle RD bit toggle
00102     * for SPI8: 8clocks
00103     * for SPI16: 16 clocks
00104     */   
00105     virtual void dummyread ();
00106     
00107     /** ILI932x specific, select register for a successive write or read
00108     *
00109     * @param reg register to be selected
00110     * @param forread false = a write next (default), true = a read next
00111     * @note forread only used by SPI protocols
00112     */   
00113     virtual void reg_select(unsigned char reg, bool forread =false);
00114     
00115     /** ILI932x specific, write register with data
00116     *
00117     * @param reg register to write
00118     * @param data 16bit data
00119     */   
00120     virtual void reg_write(unsigned char reg, unsigned short data);
00121     
00122     /** ILI932x specific, read register
00123     *
00124     * @param reg register to be read
00125     * @returns 16bit register value
00126     */ 
00127     virtual unsigned short reg_read(unsigned char reg);
00128     
00129     /** HW reset sequence (without display init commands)   
00130     */
00131     virtual void hw_reset();
00132     
00133     /** Set ChipSelect high or low
00134     * @param enable 0/1   
00135     */
00136     virtual void BusEnable(bool enable);
00137   
00138    
00139 
00140 private:
00141 
00142     BusInOut _bus;
00143     DigitalOut _CS; 
00144     DigitalOut _reset;
00145     DigitalOut _DC;
00146     DigitalOut _WR;
00147     DigitalOut _RD;
00148   
00149 };
00150 #endif