PAR16.cpp

00001  /* mbed UniGraphic library - PAR16 protocol class
00002  * Copyright (c) 2015 Giuliano Dianda
00003  * Released under the MIT License: http://mbed.org/license/mit
00004  *
00005  * Derived work of:
00006  *
00007  * mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller
00008  * Copyright (c) 2013 Peter Drescher - DC2PD
00009  *
00010  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00011  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00012  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00013  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00014  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00015  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00016  * THE SOFTWARE.
00017  */
00018 #include "platform.h" 
00019 #if DEVICE_PORTINOUT 
00020  
00021 #include "PAR16.h"
00022 
00023 PAR16::PAR16(PortName port, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD)
00024     : _port(port,0xFFFF), _CS(CS), _reset(reset), _DC(DC), _WR(WR), _RD(RD)
00025 {
00026     _reset = 1;
00027     _DC=1;
00028     _WR=1;
00029     _RD=1;
00030     _CS=1;
00031     _port.mode(PullNone);
00032     _port.output(); // will re-enable our GPIO port
00033     hw_reset();    
00034 }
00035 
00036 void PAR16::wr_cmd8(unsigned char cmd)
00037 {      
00038     _DC = 0; // 0=cmd
00039     _port.write(cmd);      // write 8bit
00040     _WR=0;
00041     _WR=1;
00042     _DC = 1; // 1=data next
00043 }
00044 void PAR16::wr_data8(unsigned char data)
00045 {
00046     _port.write(data);    // write 8bit
00047     _WR=0;
00048     _WR=1;
00049 }
00050 void PAR16::wr_cmd16(unsigned short cmd)
00051 {    
00052     _DC = 0; // 0=cmd
00053     _port.write(cmd>>8);      // write 8bit
00054     _WR=0;
00055     _WR=1;
00056     _port.write(cmd&0xFF);      // write 8bit
00057     _WR=0;
00058     _WR=1;
00059     _DC = 1; // 1=data next
00060 }
00061 void PAR16::wr_data16(unsigned short data)
00062 {
00063     _port.write(data>>8);    // write 8bit
00064     _WR=0;
00065     _WR=1;
00066     _port.write(data&0xFF);    // write 8bit
00067     _WR=0;
00068     _WR=1;
00069 }
00070 void PAR16::wr_gram(unsigned short data)
00071 {
00072     _port.write(data);    // write 16bit
00073     _WR=0;
00074     _WR=1;
00075 }
00076 void PAR16::wr_gram(unsigned short data, unsigned int count)
00077 {
00078     while(count)
00079     {
00080         _port.write(data);    // rewrite even if same data, otherwise too much fast
00081         _WR=0;
00082         _WR=1;
00083         count--;
00084     }
00085 }
00086 void PAR16::wr_grambuf(unsigned short* data, unsigned int lenght)
00087 {
00088     while(lenght)
00089     {
00090         _port.write(*data);    // write 16bit
00091         _WR=0;
00092         _WR=1;
00093         data++;
00094         lenght--;
00095     }
00096 }
00097 unsigned short PAR16::rd_gram(bool convert)
00098 {
00099     unsigned int r=0;
00100    _port.input();
00101    
00102     _RD = 0;
00103     _port.read(); //dummy read
00104     _RD = 1;
00105     
00106     _RD = 0;
00107   //  _RD = 0; // add wait
00108     r |= _port.read();
00109     _RD = 1;
00110     if(convert)
00111     {
00112         r <<= 8;
00113         _RD = 0;
00114   //      _RD = 0; // add wait
00115         r |= _port.read()>>8; //MSB of port read is blue, LSB is red of next pixel
00116         _RD = 1;
00117         // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
00118         // during reading, you read the raw 18bit gram
00119         r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
00120     }
00121     _port.output();
00122     return (unsigned short)r;
00123 }
00124 unsigned int PAR16::rd_reg_data32(unsigned char reg)
00125 {
00126     wr_cmd8(reg);
00127     unsigned int r=0;
00128   //  _DC = 1; // 1=data
00129    _port.input();
00130    
00131     _RD = 0;
00132     _port.read(); //dummy read
00133     _RD = 1;
00134     
00135     _RD = 0;
00136 //    _RD = 0; // add wait
00137     r |= (_port.read()&0xFF);
00138     r <<= 8;
00139     _RD = 1;
00140     
00141     _RD = 0;
00142 //    _RD = 0; // add wait
00143     r |= (_port.read()&0xFF);
00144     r <<= 8;
00145     _RD = 1;
00146     
00147     _RD = 0;
00148 //    _RD = 0; // add wait
00149     r |= (_port.read()&0xFF);
00150     r <<= 8;
00151     _RD = 1;
00152     
00153     _RD = 0;
00154 //    _RD = 0; // add wait
00155     r |= (_port.read()&0xFF);
00156     _RD = 1;
00157     
00158     _CS = 1; // toggle CS to interupt the cmd in case was not supported
00159     _CS = 0;
00160 
00161     _port.output();
00162     return r;
00163 }
00164 // in Par mode EXTC regs (0xB0-0xFF) can be directly read
00165 unsigned int PAR16::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd)
00166 {
00167     return rd_reg_data32(reg);
00168 }
00169 // ILI932x specific
00170 void PAR16::dummyread()
00171 {
00172     _port.input();
00173     _RD = 0;
00174     _port.read();    // dummy read
00175     _RD=1;
00176  //   _port.output();
00177 }
00178 // ILI932x specific
00179 void PAR16::reg_select(unsigned char reg, bool forread)
00180 {    
00181     _DC = 0;
00182     _port.write(reg);    // write 16bit
00183     _WR=0;
00184     _WR=1;
00185     _DC = 1; // 1=data next
00186 }
00187 // ILI932x specific
00188 void PAR16::reg_write(unsigned char reg, unsigned short data)
00189 {
00190     _DC = 0;
00191     _port.write(reg);    // write 16bit
00192     _WR=0;
00193     _WR=1;
00194     _DC = 1;
00195     _port.write(data);    // write 16bit
00196     _WR=0;
00197     _WR=1;
00198 }
00199 // ILI932x specific
00200 unsigned short PAR16::reg_read(unsigned char reg)
00201 {
00202     unsigned short r=0;
00203     _DC = 0;
00204     _port.write(reg);    // write 16bit
00205     _WR=0;
00206     _WR=1;
00207     _DC = 1;
00208     _port.input();
00209     _RD=0;
00210     r |= _port.read();    // read 16bit
00211     _RD=1;
00212     _port.output();
00213     return r;
00214 }
00215 void PAR16::hw_reset()
00216 {
00217     thread_sleep_for(15);
00218     _DC = 1;
00219     _CS = 1;
00220     _WR = 1;
00221     _RD = 1;
00222     _reset = 0;                        // display reset
00223     thread_sleep_for(2);
00224     _reset = 1;                       // end reset
00225     thread_sleep_for(100);
00226 }
00227 void PAR16::BusEnable(bool enable)
00228 {
00229     _CS = enable ? 0:1;
00230 }
00231 
00232 #endif