Stepan Smejkal / UniGraphic

.

Protocols/SPI8.cpp@20:14daa48ffd4c, 2015-03-23 (annotated)

Committer:
Geremia
Date:
Mon Mar 23 14:08:04 2015 +0000
Revision:
20:14daa48ffd4c
Parent:
11:b842b8e332cb 
Add  ILI 9320/9325/9328 custom TFT932x class, parallel/spi 8/16bit, with orientation, scroll, pixelread, fastwindow.; Par8 and 16 tested, SPI not at all, needs checking if the CS toggle is necessary (see SPI8.cpp SPI16.cpp).

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Geremia 4:12ba0ecc2c1f 1 /* mbed UniGraphic library - SPI8 protocol class
Geremia 4:12ba0ecc2c1f 2 * Copyright (c) 2015 Giuliano Dianda
Geremia 4:12ba0ecc2c1f 3 * Released under the MIT License: http://mbed.org/license/mit
Geremia 4:12ba0ecc2c1f 4 *
Geremia 4:12ba0ecc2c1f 5 * Derived work of:
Geremia 4:12ba0ecc2c1f 6 *
Geremia 4:12ba0ecc2c1f 7 * mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller
Geremia 4:12ba0ecc2c1f 8 * Copyright (c) 2013 Peter Drescher - DC2PD
Geremia 4:12ba0ecc2c1f 9 *
Geremia 4:12ba0ecc2c1f 10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Geremia 4:12ba0ecc2c1f 11 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Geremia 4:12ba0ecc2c1f 12 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Geremia 4:12ba0ecc2c1f 13 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Geremia 4:12ba0ecc2c1f 14 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Geremia 4:12ba0ecc2c1f 15 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
Geremia 4:12ba0ecc2c1f 16 * THE SOFTWARE.
Geremia 4:12ba0ecc2c1f 17 */
Geremia 4:12ba0ecc2c1f 18
Geremia 0:75ec1b3cde17 19 #include "SPI8.h"
Geremia 0:75ec1b3cde17 20
Geremia 0:75ec1b3cde17 21
Geremia 1:ff019d22b275 22 SPI8::SPI8(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC)
Geremia 0:75ec1b3cde17 23 : _CS(CS), _spi(mosi, miso, sclk), _reset(reset), _DC(DC)
Geremia 0:75ec1b3cde17 24 {
Geremia 0:75ec1b3cde17 25 _reset = 1;
Geremia 0:75ec1b3cde17 26 _DC=1;
Geremia 0:75ec1b3cde17 27 _CS=1;
Geremia 0:75ec1b3cde17 28 _spi.format(8,0); // 8 bit spi mode 0
Geremia 1:ff019d22b275 29 _spi.frequency(Hz);
Geremia 0:75ec1b3cde17 30 hw_reset();
Geremia 0:75ec1b3cde17 31 }
Geremia 0:75ec1b3cde17 32
Geremia 1:ff019d22b275 33 void SPI8::wr_cmd8(unsigned char cmd)
Geremia 20:14daa48ffd4c 34 {
Geremia 0:75ec1b3cde17 35 _DC.write(0); // 0=cmd
Geremia 0:75ec1b3cde17 36 _spi.write(cmd); // write 8bit
Geremia 20:14daa48ffd4c 37 _DC.write(1); // 1=data next
Geremia 0:75ec1b3cde17 38 }
Geremia 1:ff019d22b275 39 void SPI8::wr_data8(unsigned char data)
Geremia 0:75ec1b3cde17 40 {
Geremia 1:ff019d22b275 41 _spi.write(data); // write 8bit
Geremia 0:75ec1b3cde17 42 }
Geremia 1:ff019d22b275 43 void SPI8::wr_cmd16(unsigned short cmd)
Geremia 20:14daa48ffd4c 44 {
Geremia 1:ff019d22b275 45 _DC.write(0); // 0=cmd
Geremia 1:ff019d22b275 46 _spi.write(cmd>>8); // write 8bit
Geremia 1:ff019d22b275 47 _spi.write(cmd&0xFF); // write 8bit
Geremia 20:14daa48ffd4c 48 _DC.write(1); // 1=data next
Geremia 1:ff019d22b275 49 }
Geremia 1:ff019d22b275 50 void SPI8::wr_data16(unsigned short data)
Geremia 1:ff019d22b275 51 {
Geremia 1:ff019d22b275 52 _spi.write(data>>8); // write 8bit
Geremia 1:ff019d22b275 53 _spi.write(data&0xFF); // write 8bit
Geremia 1:ff019d22b275 54 }
Geremia 4:12ba0ecc2c1f 55 void SPI8::wr_gram(unsigned short data)
Geremia 4:12ba0ecc2c1f 56 {
Geremia 4:12ba0ecc2c1f 57 _spi.write(data>>8); // write 8bit
Geremia 4:12ba0ecc2c1f 58 _spi.write(data&0xFF); // write 8bit
Geremia 4:12ba0ecc2c1f 59 }
Geremia 4:12ba0ecc2c1f 60 void SPI8::wr_gram(unsigned short data, unsigned int count)
Geremia 1:ff019d22b275 61 {
Geremia 1:ff019d22b275 62 if((data>>8)==(data&0xFF))
Geremia 1:ff019d22b275 63 {
Geremia 1:ff019d22b275 64 count<<=1;
Geremia 1:ff019d22b275 65 while(count)
Geremia 1:ff019d22b275 66 {
Geremia 1:ff019d22b275 67 _spi.write(data); // write 8bit
Geremia 1:ff019d22b275 68 count--;
Geremia 1:ff019d22b275 69 }
Geremia 1:ff019d22b275 70 }
Geremia 1:ff019d22b275 71 else
Geremia 1:ff019d22b275 72 {
Geremia 1:ff019d22b275 73 while(count)
Geremia 1:ff019d22b275 74 {
Geremia 1:ff019d22b275 75 _spi.write(data>>8); // write 8bit
Geremia 1:ff019d22b275 76 _spi.write(data&0xFF); // write 8bit
Geremia 1:ff019d22b275 77 count--;
Geremia 1:ff019d22b275 78 }
Geremia 1:ff019d22b275 79 }
Geremia 1:ff019d22b275 80 }
Geremia 4:12ba0ecc2c1f 81 void SPI8::wr_grambuf(unsigned short* data, unsigned int lenght)
Geremia 1:ff019d22b275 82 {
Geremia 1:ff019d22b275 83 while(lenght)
Geremia 1:ff019d22b275 84 {
Geremia 1:ff019d22b275 85 _spi.write((*data)>>8); // write 8bit
Geremia 1:ff019d22b275 86 _spi.write((*data)&0xFF); // write 8bit
Geremia 1:ff019d22b275 87 data++;
Geremia 0:75ec1b3cde17 88 lenght--;
Geremia 0:75ec1b3cde17 89 }
Geremia 0:75ec1b3cde17 90 }
Geremia 11:b842b8e332cb 91 unsigned short SPI8::rd_gram(bool convert)
Geremia 5:b222a9461d6b 92 {
Geremia 5:b222a9461d6b 93 unsigned int r=0;
Geremia 5:b222a9461d6b 94 _spi.write(0); // whole first byte is dummy
Geremia 5:b222a9461d6b 95 r |= _spi.write(0);
Geremia 5:b222a9461d6b 96 r <<= 8;
Geremia 5:b222a9461d6b 97 r |= _spi.write(0);
Geremia 11:b842b8e332cb 98 if(convert)
Geremia 11:b842b8e332cb 99 {
Geremia 11:b842b8e332cb 100 r <<= 8;
Geremia 11:b842b8e332cb 101 r |= _spi.write(0);
Geremia 11:b842b8e332cb 102 // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
Geremia 11:b842b8e332cb 103 // during reading, you read the raw 18bit gram
Geremia 11:b842b8e332cb 104 r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
Geremia 11:b842b8e332cb 105 }
Geremia 5:b222a9461d6b 106 _CS = 1; // force CS HIG to interupt the "read state"
Geremia 5:b222a9461d6b 107 _CS = 0;
Geremia 5:b222a9461d6b 108 return (unsigned short)r;
Geremia 5:b222a9461d6b 109 }
Geremia 7:bb0383b91104 110 unsigned int SPI8::rd_reg_data32(unsigned char reg)
Geremia 7:bb0383b91104 111 {
Geremia 7:bb0383b91104 112 wr_cmd8(reg);
Geremia 7:bb0383b91104 113 unsigned int r=0;
Geremia 7:bb0383b91104 114
Geremia 7:bb0383b91104 115 r |= _spi.write(0); // we get only 7bit valid, first bit was the dummy cycle
Geremia 7:bb0383b91104 116 r <<= 8;
Geremia 7:bb0383b91104 117 r |= _spi.write(0);
Geremia 7:bb0383b91104 118 r <<= 8;
Geremia 7:bb0383b91104 119 r |= _spi.write(0);
Geremia 7:bb0383b91104 120 r <<= 8;
Geremia 7:bb0383b91104 121 r |= _spi.write(0);
Geremia 7:bb0383b91104 122 r <<= 1; // 32bits are aligned, now collecting bit_0
Geremia 7:bb0383b91104 123 r |= (_spi.write(0) >> 7);
Geremia 7:bb0383b91104 124 // we clocked 7 more bit so ILI waiting for 8th, we need to reset spi bus
Geremia 7:bb0383b91104 125 _CS = 1; // force CS HIG to interupt the cmd
Geremia 7:bb0383b91104 126 _CS = 0;
Geremia 7:bb0383b91104 127 return r;
Geremia 7:bb0383b91104 128 }
Geremia 7:bb0383b91104 129 unsigned int SPI8::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd)
Geremia 7:bb0383b91104 130 {
Geremia 7:bb0383b91104 131 unsigned int r=0;
Geremia 7:bb0383b91104 132 for(int regparam=1; regparam<4; regparam++) // when reading EXTC regs, first parameter is always dummy, so start with 1
Geremia 7:bb0383b91104 133 {
Geremia 7:bb0383b91104 134 wr_cmd8(SPIreadenablecmd); // spi-in enable cmd, 0xD9 (ili9341) or 0xFB (ili9488) or don't know
Geremia 7:bb0383b91104 135 wr_data8(0xF0|regparam); // in low nibble specify which reg parameter we want
Geremia 7:bb0383b91104 136 wr_cmd8(reg); // now send cmd (select register we want to read)
Geremia 7:bb0383b91104 137 r <<= 8;
Geremia 7:bb0383b91104 138 r |= _spi.write(0);
Geremia 7:bb0383b91104 139 // r = _spi.write(0) >> 8; for 16bit
Geremia 7:bb0383b91104 140 }
Geremia 20:14daa48ffd4c 141 _CS = 1; // force CS HIG to interupt the cmd
Geremia 7:bb0383b91104 142 _CS = 0;
Geremia 20:14daa48ffd4c 143 return r;
Geremia 20:14daa48ffd4c 144 }
Geremia 20:14daa48ffd4c 145 // ILI932x specific
Geremia 20:14daa48ffd4c 146 void SPI8::dummyread()
Geremia 20:14daa48ffd4c 147 {
Geremia 20:14daa48ffd4c 148 _spi.write(0); // dummy read
Geremia 20:14daa48ffd4c 149 }
Geremia 20:14daa48ffd4c 150 // ILI932x specific
Geremia 20:14daa48ffd4c 151 void SPI8::reg_select(unsigned char reg, bool forread)
Geremia 20:14daa48ffd4c 152 {
Geremia 20:14daa48ffd4c 153 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 154 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 155 _spi.write(0x70);
Geremia 20:14daa48ffd4c 156 _spi.write(0); // write MSB
Geremia 20:14daa48ffd4c 157 _spi.write(reg); // write LSB
Geremia 20:14daa48ffd4c 158 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 159 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 160 if(forread) _spi.write(0x73);
Geremia 20:14daa48ffd4c 161 else _spi.write(0x72);
Geremia 20:14daa48ffd4c 162 }
Geremia 20:14daa48ffd4c 163 // ILI932x specific
Geremia 20:14daa48ffd4c 164 void SPI8::reg_write(unsigned char reg, unsigned short data)
Geremia 20:14daa48ffd4c 165 {
Geremia 20:14daa48ffd4c 166 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 167 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 168 _spi.write(0x70);
Geremia 20:14daa48ffd4c 169 _spi.write(0); // write MSB
Geremia 20:14daa48ffd4c 170 _spi.write(reg); // write LSB
Geremia 20:14daa48ffd4c 171 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 172 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 173 _spi.write(0x72);
Geremia 20:14daa48ffd4c 174 _spi.write(data>>8);
Geremia 20:14daa48ffd4c 175 _spi.write(data&0xFF);
Geremia 20:14daa48ffd4c 176 }
Geremia 20:14daa48ffd4c 177 // ILI932x specific
Geremia 20:14daa48ffd4c 178 unsigned short SPI8::reg_read(unsigned char reg)
Geremia 20:14daa48ffd4c 179 {
Geremia 20:14daa48ffd4c 180 unsigned short r=0;
Geremia 20:14daa48ffd4c 181 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 182 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 183 _spi.write(0x70);
Geremia 20:14daa48ffd4c 184 _spi.write(0); // write MSB
Geremia 20:14daa48ffd4c 185 _spi.write(reg); // write LSB
Geremia 20:14daa48ffd4c 186 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 187 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 188 _spi.write(0x73);
Geremia 20:14daa48ffd4c 189 _spi.write(0); // dummy read
Geremia 20:14daa48ffd4c 190 r = _spi.write(0); // read 8bit
Geremia 20:14daa48ffd4c 191 r <<= 8;
Geremia 20:14daa48ffd4c 192 r |= _spi.write(0); // read 8bit
Geremia 7:bb0383b91104 193 return r;
Geremia 7:bb0383b91104 194 }
Geremia 0:75ec1b3cde17 195 void SPI8::hw_reset()
Geremia 0:75ec1b3cde17 196 {
Geremia 0:75ec1b3cde17 197 wait_ms(15);
Geremia 0:75ec1b3cde17 198 _DC = 1;
Geremia 20:14daa48ffd4c 199 _CS = 1;
Geremia 0:75ec1b3cde17 200 _reset = 0; // display reset
Geremia 20:14daa48ffd4c 201 wait_ms(2);
Geremia 0:75ec1b3cde17 202 _reset = 1; // end reset
Geremia 20:14daa48ffd4c 203 wait_ms(100);
Geremia 0:75ec1b3cde17 204 }
Geremia 0:75ec1b3cde17 205 void SPI8::BusEnable(bool enable)
Geremia 0:75ec1b3cde17 206 {
Geremia 0:75ec1b3cde17 207 _CS = enable ? 0:1;
Geremia 0:75ec1b3cde17 208 }