Radu Radoveneanu / UniGraphic

Basically i glued Peter Drescher and Simon Ford libs in a GraphicsDisplay class, then derived TFT or LCD class (which inherits Protocols class), then the most derived ones (Inits), which are per-display and are the only part needed to be adapted to diff hw.

Fork of UniGraphic by GraphicsDisplay

Protocols/BUS16.cpp@21:ae0a4eedfc90, 2015-03-31 (annotated)

Committer:
Geremia
Date:
Tue Mar 31 21:14:48 2015 +0000
Revision:
21:ae0a4eedfc90
Add BUS_8 and BUS_16 (slow as expected)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Geremia 21:ae0a4eedfc90 1 /* mbed UniGraphic library - BUS16 protocol class
Geremia 21:ae0a4eedfc90 2 * Copyright (c) 2015 Giuliano Dianda
Geremia 21:ae0a4eedfc90 3 * Released under the MIT License: http://mbed.org/license/mit
Geremia 21:ae0a4eedfc90 4 *
Geremia 21:ae0a4eedfc90 5 * Derived work of:
Geremia 21:ae0a4eedfc90 6 *
Geremia 21:ae0a4eedfc90 7 * mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller
Geremia 21:ae0a4eedfc90 8 * Copyright (c) 2013 Peter Drescher - DC2PD
Geremia 21:ae0a4eedfc90 9 *
Geremia 21:ae0a4eedfc90 10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Geremia 21:ae0a4eedfc90 11 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Geremia 21:ae0a4eedfc90 12 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Geremia 21:ae0a4eedfc90 13 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Geremia 21:ae0a4eedfc90 14 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Geremia 21:ae0a4eedfc90 15 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Geremia 21:ae0a4eedfc90 16 * THE SOFTWARE.
Geremia 21:ae0a4eedfc90 17 */
Geremia 21:ae0a4eedfc90 18 #include "BUS16.h"
Geremia 21:ae0a4eedfc90 19
Geremia 21:ae0a4eedfc90 20 BUS16::BUS16(PinName* buspins, PinName CS, PinName reset, PinName DC, PinName WR, PinName RD)
Geremia 21:ae0a4eedfc90 21 : _bus(buspins), _CS(CS), _reset(reset), _DC(DC), _WR(WR), _RD(RD)
Geremia 21:ae0a4eedfc90 22 {
Geremia 21:ae0a4eedfc90 23 _reset = 1;
Geremia 21:ae0a4eedfc90 24 _DC=1;
Geremia 21:ae0a4eedfc90 25 _WR=1;
Geremia 21:ae0a4eedfc90 26 _RD=1;
Geremia 21:ae0a4eedfc90 27 _CS=1;
Geremia 21:ae0a4eedfc90 28 _bus.mode(PullNone);
Geremia 21:ae0a4eedfc90 29 _bus.output(); // will re-enable our GPIO port
Geremia 21:ae0a4eedfc90 30 hw_reset();
Geremia 21:ae0a4eedfc90 31 }
Geremia 21:ae0a4eedfc90 32
Geremia 21:ae0a4eedfc90 33 void BUS16::wr_cmd8(unsigned char cmd)
Geremia 21:ae0a4eedfc90 34 {
Geremia 21:ae0a4eedfc90 35 _DC = 0; // 0=cmd
Geremia 21:ae0a4eedfc90 36 _bus.write(cmd); // write 8bit
Geremia 21:ae0a4eedfc90 37 _WR=0;
Geremia 21:ae0a4eedfc90 38 _WR=1;
Geremia 21:ae0a4eedfc90 39 _DC = 1; // 1=data next
Geremia 21:ae0a4eedfc90 40 }
Geremia 21:ae0a4eedfc90 41 void BUS16::wr_data8(unsigned char data)
Geremia 21:ae0a4eedfc90 42 {
Geremia 21:ae0a4eedfc90 43 _bus.write(data); // write 8bit
Geremia 21:ae0a4eedfc90 44 _WR=0;
Geremia 21:ae0a4eedfc90 45 _WR=1;
Geremia 21:ae0a4eedfc90 46 }
Geremia 21:ae0a4eedfc90 47 void BUS16::wr_cmd16(unsigned short cmd)
Geremia 21:ae0a4eedfc90 48 {
Geremia 21:ae0a4eedfc90 49 _DC = 0; // 0=cmd
Geremia 21:ae0a4eedfc90 50 _bus.write(cmd>>8); // write 8bit
Geremia 21:ae0a4eedfc90 51 _WR=0;
Geremia 21:ae0a4eedfc90 52 _WR=1;
Geremia 21:ae0a4eedfc90 53 _bus.write(cmd&0xFF); // write 8bit
Geremia 21:ae0a4eedfc90 54 _WR=0;
Geremia 21:ae0a4eedfc90 55 _WR=1;
Geremia 21:ae0a4eedfc90 56 _DC = 1; // 1=data next
Geremia 21:ae0a4eedfc90 57 }
Geremia 21:ae0a4eedfc90 58 void BUS16::wr_data16(unsigned short data)
Geremia 21:ae0a4eedfc90 59 {
Geremia 21:ae0a4eedfc90 60 _bus.write(data>>8); // write 8bit
Geremia 21:ae0a4eedfc90 61 _WR=0;
Geremia 21:ae0a4eedfc90 62 _WR=1;
Geremia 21:ae0a4eedfc90 63 _bus.write(data&0xFF); // write 8bit
Geremia 21:ae0a4eedfc90 64 _WR=0;
Geremia 21:ae0a4eedfc90 65 _WR=1;
Geremia 21:ae0a4eedfc90 66 }
Geremia 21:ae0a4eedfc90 67 void BUS16::wr_gram(unsigned short data)
Geremia 21:ae0a4eedfc90 68 {
Geremia 21:ae0a4eedfc90 69 _bus.write(data); // write 16bit
Geremia 21:ae0a4eedfc90 70 _WR=0;
Geremia 21:ae0a4eedfc90 71 _WR=1;
Geremia 21:ae0a4eedfc90 72 }
Geremia 21:ae0a4eedfc90 73 void BUS16::wr_gram(unsigned short data, unsigned int count)
Geremia 21:ae0a4eedfc90 74 {
Geremia 21:ae0a4eedfc90 75 while(count)
Geremia 21:ae0a4eedfc90 76 {
Geremia 21:ae0a4eedfc90 77 _bus.write(data); // rewrite even if same data, otherwise too much fast
Geremia 21:ae0a4eedfc90 78 _WR=0;
Geremia 21:ae0a4eedfc90 79 _WR=1;
Geremia 21:ae0a4eedfc90 80 count--;
Geremia 21:ae0a4eedfc90 81 }
Geremia 21:ae0a4eedfc90 82 }
Geremia 21:ae0a4eedfc90 83 void BUS16::wr_grambuf(unsigned short* data, unsigned int lenght)
Geremia 21:ae0a4eedfc90 84 {
Geremia 21:ae0a4eedfc90 85 while(lenght)
Geremia 21:ae0a4eedfc90 86 {
Geremia 21:ae0a4eedfc90 87 _bus.write(*data); // write 16bit
Geremia 21:ae0a4eedfc90 88 _WR=0;
Geremia 21:ae0a4eedfc90 89 _WR=1;
Geremia 21:ae0a4eedfc90 90 data++;
Geremia 21:ae0a4eedfc90 91 lenght--;
Geremia 21:ae0a4eedfc90 92 }
Geremia 21:ae0a4eedfc90 93 }
Geremia 21:ae0a4eedfc90 94 unsigned short BUS16::rd_gram(bool convert)
Geremia 21:ae0a4eedfc90 95 {
Geremia 21:ae0a4eedfc90 96 unsigned int r=0;
Geremia 21:ae0a4eedfc90 97 _bus.input();
Geremia 21:ae0a4eedfc90 98
Geremia 21:ae0a4eedfc90 99 _RD = 0;
Geremia 21:ae0a4eedfc90 100 _bus.read(); //dummy read
Geremia 21:ae0a4eedfc90 101 _RD = 1;
Geremia 21:ae0a4eedfc90 102
Geremia 21:ae0a4eedfc90 103 _RD = 0;
Geremia 21:ae0a4eedfc90 104 // _RD = 0; // add wait
Geremia 21:ae0a4eedfc90 105 r |= _bus.read();
Geremia 21:ae0a4eedfc90 106 _RD = 1;
Geremia 21:ae0a4eedfc90 107 if(convert)
Geremia 21:ae0a4eedfc90 108 {
Geremia 21:ae0a4eedfc90 109 r <<= 8;
Geremia 21:ae0a4eedfc90 110 _RD = 0;
Geremia 21:ae0a4eedfc90 111 // _RD = 0; // add wait
Geremia 21:ae0a4eedfc90 112 r |= _bus.read()>>8; //MSB of port read is blue, LSB is red of next pixel
Geremia 21:ae0a4eedfc90 113 _RD = 1;
Geremia 21:ae0a4eedfc90 114 // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
Geremia 21:ae0a4eedfc90 115 // during reading, you read the raw 18bit gram
Geremia 21:ae0a4eedfc90 116 r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
Geremia 21:ae0a4eedfc90 117 }
Geremia 21:ae0a4eedfc90 118 _bus.output();
Geremia 21:ae0a4eedfc90 119 return (unsigned short)r;
Geremia 21:ae0a4eedfc90 120 }
Geremia 21:ae0a4eedfc90 121 unsigned int BUS16::rd_reg_data32(unsigned char reg)
Geremia 21:ae0a4eedfc90 122 {
Geremia 21:ae0a4eedfc90 123 wr_cmd8(reg);
Geremia 21:ae0a4eedfc90 124 unsigned int r=0;
Geremia 21:ae0a4eedfc90 125 // _DC = 1; // 1=data
Geremia 21:ae0a4eedfc90 126 _bus.input();
Geremia 21:ae0a4eedfc90 127
Geremia 21:ae0a4eedfc90 128 _RD = 0;
Geremia 21:ae0a4eedfc90 129 _bus.read(); //dummy read
Geremia 21:ae0a4eedfc90 130 _RD = 1;
Geremia 21:ae0a4eedfc90 131
Geremia 21:ae0a4eedfc90 132 _RD = 0;
Geremia 21:ae0a4eedfc90 133 // _RD = 0; // add wait
Geremia 21:ae0a4eedfc90 134 r |= (_bus.read()&0xFF);
Geremia 21:ae0a4eedfc90 135 r <<= 8;
Geremia 21:ae0a4eedfc90 136 _RD = 1;
Geremia 21:ae0a4eedfc90 137
Geremia 21:ae0a4eedfc90 138 _RD = 0;
Geremia 21:ae0a4eedfc90 139 // _RD = 0; // add wait
Geremia 21:ae0a4eedfc90 140 r |= (_bus.read()&0xFF);
Geremia 21:ae0a4eedfc90 141 r <<= 8;
Geremia 21:ae0a4eedfc90 142 _RD = 1;
Geremia 21:ae0a4eedfc90 143
Geremia 21:ae0a4eedfc90 144 _RD = 0;
Geremia 21:ae0a4eedfc90 145 // _RD = 0; // add wait
Geremia 21:ae0a4eedfc90 146 r |= (_bus.read()&0xFF);
Geremia 21:ae0a4eedfc90 147 r <<= 8;
Geremia 21:ae0a4eedfc90 148 _RD = 1;
Geremia 21:ae0a4eedfc90 149
Geremia 21:ae0a4eedfc90 150 _RD = 0;
Geremia 21:ae0a4eedfc90 151 // _RD = 0; // add wait
Geremia 21:ae0a4eedfc90 152 r |= (_bus.read()&0xFF);
Geremia 21:ae0a4eedfc90 153 _RD = 1;
Geremia 21:ae0a4eedfc90 154
Geremia 21:ae0a4eedfc90 155 _CS = 1; // toggle CS to interupt the cmd in case was not supported
Geremia 21:ae0a4eedfc90 156 _CS = 0;
Geremia 21:ae0a4eedfc90 157
Geremia 21:ae0a4eedfc90 158 _bus.output();
Geremia 21:ae0a4eedfc90 159 return r;
Geremia 21:ae0a4eedfc90 160 }
Geremia 21:ae0a4eedfc90 161 // in Par mode EXTC regs (0xB0-0xFF) can be directly read
Geremia 21:ae0a4eedfc90 162 unsigned int BUS16::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd)
Geremia 21:ae0a4eedfc90 163 {
Geremia 21:ae0a4eedfc90 164 return rd_reg_data32(reg);
Geremia 21:ae0a4eedfc90 165 }
Geremia 21:ae0a4eedfc90 166 // ILI932x specific
Geremia 21:ae0a4eedfc90 167 void BUS16::dummyread()
Geremia 21:ae0a4eedfc90 168 {
Geremia 21:ae0a4eedfc90 169 _bus.input();
Geremia 21:ae0a4eedfc90 170 _RD = 0;
Geremia 21:ae0a4eedfc90 171 _bus.read(); // dummy read
Geremia 21:ae0a4eedfc90 172 _RD=1;
Geremia 21:ae0a4eedfc90 173 // _bus.output();
Geremia 21:ae0a4eedfc90 174 }
Geremia 21:ae0a4eedfc90 175 // ILI932x specific
Geremia 21:ae0a4eedfc90 176 void BUS16::reg_select(unsigned char reg, bool forread)
Geremia 21:ae0a4eedfc90 177 {
Geremia 21:ae0a4eedfc90 178 _DC = 0;
Geremia 21:ae0a4eedfc90 179 _bus.write(reg); // write 16bit
Geremia 21:ae0a4eedfc90 180 _WR=0;
Geremia 21:ae0a4eedfc90 181 _WR=1;
Geremia 21:ae0a4eedfc90 182 _DC = 1; // 1=data next
Geremia 21:ae0a4eedfc90 183 }
Geremia 21:ae0a4eedfc90 184 // ILI932x specific
Geremia 21:ae0a4eedfc90 185 void BUS16::reg_write(unsigned char reg, unsigned short data)
Geremia 21:ae0a4eedfc90 186 {
Geremia 21:ae0a4eedfc90 187 _DC = 0;
Geremia 21:ae0a4eedfc90 188 _bus.write(reg); // write 16bit
Geremia 21:ae0a4eedfc90 189 _WR=0;
Geremia 21:ae0a4eedfc90 190 _WR=1;
Geremia 21:ae0a4eedfc90 191 _DC = 1;
Geremia 21:ae0a4eedfc90 192 _bus.write(data); // write 16bit
Geremia 21:ae0a4eedfc90 193 _WR=0;
Geremia 21:ae0a4eedfc90 194 _WR=1;
Geremia 21:ae0a4eedfc90 195 }
Geremia 21:ae0a4eedfc90 196 // ILI932x specific
Geremia 21:ae0a4eedfc90 197 unsigned short BUS16::reg_read(unsigned char reg)
Geremia 21:ae0a4eedfc90 198 {
Geremia 21:ae0a4eedfc90 199 unsigned short r=0;
Geremia 21:ae0a4eedfc90 200 _DC = 0;
Geremia 21:ae0a4eedfc90 201 _bus.write(reg); // write 16bit
Geremia 21:ae0a4eedfc90 202 _WR=0;
Geremia 21:ae0a4eedfc90 203 _WR=1;
Geremia 21:ae0a4eedfc90 204 _DC = 1;
Geremia 21:ae0a4eedfc90 205 _bus.input();
Geremia 21:ae0a4eedfc90 206 _RD=0;
Geremia 21:ae0a4eedfc90 207 r |= _bus.read(); // read 16bit
Geremia 21:ae0a4eedfc90 208 _RD=1;
Geremia 21:ae0a4eedfc90 209 _bus.output();
Geremia 21:ae0a4eedfc90 210 return r;
Geremia 21:ae0a4eedfc90 211 }
Geremia 21:ae0a4eedfc90 212 void BUS16::hw_reset()
Geremia 21:ae0a4eedfc90 213 {
Geremia 21:ae0a4eedfc90 214 wait_ms(15);
Geremia 21:ae0a4eedfc90 215 _DC = 1;
Geremia 21:ae0a4eedfc90 216 _CS = 1;
Geremia 21:ae0a4eedfc90 217 _WR = 1;
Geremia 21:ae0a4eedfc90 218 _RD = 1;
Geremia 21:ae0a4eedfc90 219 _reset = 0; // display reset
Geremia 21:ae0a4eedfc90 220 wait_ms(2);
Geremia 21:ae0a4eedfc90 221 _reset = 1; // end reset
Geremia 21:ae0a4eedfc90 222 wait_ms(100);
Geremia 21:ae0a4eedfc90 223 }
Geremia 21:ae0a4eedfc90 224 void BUS16::BusEnable(bool enable)
Geremia 21:ae0a4eedfc90 225 {
Geremia 21:ae0a4eedfc90 226 _CS = enable ? 0:1;
Geremia 21:ae0a4eedfc90 227 }