Satyan Raj / UniGraphic

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Protocols/SPI8.cpp@5:b222a9461d6b, 2015-02-16 (annotated)

Committer:
Geremia
Date:
Mon Feb 16 00:52:24 2015 +0000
Revision:
5:b222a9461d6b
Parent:
4:12ba0ecc2c1f
Child:
7:bb0383b91104
Added pixelread for TFTs

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 //#define USE_CS
Geremia 0:75ec1b3cde17 22
Geremia 1:ff019d22b275 23 SPI8::SPI8(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC)
Geremia 0:75ec1b3cde17 24 : _CS(CS), _spi(mosi, miso, sclk), _reset(reset), _DC(DC)
Geremia 0:75ec1b3cde17 25 {
Geremia 0:75ec1b3cde17 26 _reset = 1;
Geremia 0:75ec1b3cde17 27 _DC=1;
Geremia 0:75ec1b3cde17 28 _CS=1;
Geremia 0:75ec1b3cde17 29 _spi.format(8,0); // 8 bit spi mode 0
Geremia 0:75ec1b3cde17 30 // _spi.frequency(12000000); // 10 Mhz SPI clock, 12mhz for F411
Geremia 1:ff019d22b275 31 _spi.frequency(Hz);
Geremia 0:75ec1b3cde17 32 hw_reset();
Geremia 0:75ec1b3cde17 33 }
Geremia 0:75ec1b3cde17 34
Geremia 1:ff019d22b275 35 void SPI8::wr_cmd8(unsigned char cmd)
Geremia 0:75ec1b3cde17 36 {
Geremia 0:75ec1b3cde17 37 #ifdef USE_CS
Geremia 0:75ec1b3cde17 38 _CS = 0;
Geremia 0:75ec1b3cde17 39 #endif
Geremia 0:75ec1b3cde17 40 _DC.write(0); // 0=cmd
Geremia 0:75ec1b3cde17 41 _spi.write(cmd); // write 8bit
Geremia 0:75ec1b3cde17 42 #ifdef USE_CS
Geremia 0:75ec1b3cde17 43 _CS = 1;
Geremia 0:75ec1b3cde17 44 #endif
Geremia 0:75ec1b3cde17 45 }
Geremia 1:ff019d22b275 46 void SPI8::wr_data8(unsigned char data)
Geremia 0:75ec1b3cde17 47 {
Geremia 0:75ec1b3cde17 48 #ifdef USE_CS
Geremia 0:75ec1b3cde17 49 _CS = 0;
Geremia 0:75ec1b3cde17 50 #endif
Geremia 0:75ec1b3cde17 51 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 52 _spi.write(data); // write 8bit
Geremia 0:75ec1b3cde17 53 #ifdef USE_CS
Geremia 0:75ec1b3cde17 54 _CS = 1;
Geremia 0:75ec1b3cde17 55 #endif
Geremia 0:75ec1b3cde17 56 }
Geremia 1:ff019d22b275 57 void SPI8::wr_cmd16(unsigned short cmd)
Geremia 1:ff019d22b275 58 {
Geremia 1:ff019d22b275 59 #ifdef USE_CS
Geremia 1:ff019d22b275 60 _CS = 0;
Geremia 1:ff019d22b275 61 #endif
Geremia 1:ff019d22b275 62 _DC.write(0); // 0=cmd
Geremia 1:ff019d22b275 63 _spi.write(cmd>>8); // write 8bit
Geremia 1:ff019d22b275 64 _spi.write(cmd&0xFF); // write 8bit
Geremia 1:ff019d22b275 65 #ifdef USE_CS
Geremia 1:ff019d22b275 66 _CS = 1;
Geremia 1:ff019d22b275 67 #endif
Geremia 1:ff019d22b275 68 }
Geremia 1:ff019d22b275 69 void SPI8::wr_data16(unsigned short data)
Geremia 1:ff019d22b275 70 {
Geremia 1:ff019d22b275 71 #ifdef USE_CS
Geremia 1:ff019d22b275 72 _CS = 0;
Geremia 1:ff019d22b275 73 #endif
Geremia 1:ff019d22b275 74 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 75 _spi.write(data>>8); // write 8bit
Geremia 1:ff019d22b275 76 _spi.write(data&0xFF); // write 8bit
Geremia 1:ff019d22b275 77 #ifdef USE_CS
Geremia 1:ff019d22b275 78 _CS = 1;
Geremia 1:ff019d22b275 79 #endif
Geremia 1:ff019d22b275 80 }
Geremia 4:12ba0ecc2c1f 81 void SPI8::wr_gram(unsigned short data)
Geremia 4:12ba0ecc2c1f 82 {
Geremia 4:12ba0ecc2c1f 83 #ifdef USE_CS
Geremia 4:12ba0ecc2c1f 84 _CS = 0;
Geremia 4:12ba0ecc2c1f 85 #endif
Geremia 4:12ba0ecc2c1f 86 _DC.write(1); // 1=data
Geremia 4:12ba0ecc2c1f 87 _spi.write(data>>8); // write 8bit
Geremia 4:12ba0ecc2c1f 88 _spi.write(data&0xFF); // write 8bit
Geremia 4:12ba0ecc2c1f 89 #ifdef USE_CS
Geremia 4:12ba0ecc2c1f 90 _CS = 1;
Geremia 4:12ba0ecc2c1f 91 #endif
Geremia 4:12ba0ecc2c1f 92 }
Geremia 4:12ba0ecc2c1f 93 void SPI8::wr_gram(unsigned short data, unsigned int count)
Geremia 1:ff019d22b275 94 {
Geremia 1:ff019d22b275 95 #ifdef USE_CS
Geremia 1:ff019d22b275 96 _CS = 0;
Geremia 1:ff019d22b275 97 #endif
Geremia 1:ff019d22b275 98 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 99 if((data>>8)==(data&0xFF))
Geremia 1:ff019d22b275 100 {
Geremia 1:ff019d22b275 101 count<<=1;
Geremia 1:ff019d22b275 102 while(count)
Geremia 1:ff019d22b275 103 {
Geremia 1:ff019d22b275 104 _spi.write(data); // write 8bit
Geremia 1:ff019d22b275 105 count--;
Geremia 1:ff019d22b275 106 }
Geremia 1:ff019d22b275 107 }
Geremia 1:ff019d22b275 108 else
Geremia 1:ff019d22b275 109 {
Geremia 1:ff019d22b275 110 while(count)
Geremia 1:ff019d22b275 111 {
Geremia 1:ff019d22b275 112 _spi.write(data>>8); // write 8bit
Geremia 1:ff019d22b275 113 _spi.write(data&0xFF); // write 8bit
Geremia 1:ff019d22b275 114 count--;
Geremia 1:ff019d22b275 115 }
Geremia 1:ff019d22b275 116 }
Geremia 1:ff019d22b275 117 #ifdef USE_CS
Geremia 1:ff019d22b275 118 _CS = 1;
Geremia 1:ff019d22b275 119 #endif
Geremia 1:ff019d22b275 120 }
Geremia 4:12ba0ecc2c1f 121 void SPI8::wr_grambuf(unsigned short* data, unsigned int lenght)
Geremia 1:ff019d22b275 122 {
Geremia 1:ff019d22b275 123 #ifdef USE_CS
Geremia 1:ff019d22b275 124 _CS = 0;
Geremia 1:ff019d22b275 125 #endif
Geremia 1:ff019d22b275 126 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 127 while(lenght)
Geremia 1:ff019d22b275 128 {
Geremia 1:ff019d22b275 129 _spi.write((*data)>>8); // write 8bit
Geremia 1:ff019d22b275 130 _spi.write((*data)&0xFF); // write 8bit
Geremia 1:ff019d22b275 131 data++;
Geremia 0:75ec1b3cde17 132 lenght--;
Geremia 0:75ec1b3cde17 133 }
Geremia 0:75ec1b3cde17 134 #ifdef USE_CS
Geremia 0:75ec1b3cde17 135 _CS = 1;
Geremia 0:75ec1b3cde17 136 #endif
Geremia 0:75ec1b3cde17 137 }
Geremia 5:b222a9461d6b 138 unsigned int SPI8::rd_data32_wdummy()
Geremia 5:b222a9461d6b 139 {
Geremia 5:b222a9461d6b 140 #ifdef USE_CS
Geremia 5:b222a9461d6b 141 _CS = 0;
Geremia 5:b222a9461d6b 142 #endif
Geremia 5:b222a9461d6b 143 unsigned int r=0;
Geremia 5:b222a9461d6b 144 _DC.write(1); // 1=data
Geremia 5:b222a9461d6b 145
Geremia 5:b222a9461d6b 146 r |= _spi.write(0); // we get only 7bit valid, first bit was the dummy cycle
Geremia 5:b222a9461d6b 147 r <<= 8;
Geremia 5:b222a9461d6b 148 r |= _spi.write(0);
Geremia 5:b222a9461d6b 149 r <<= 8;
Geremia 5:b222a9461d6b 150 r |= _spi.write(0);
Geremia 5:b222a9461d6b 151 r <<= 8;
Geremia 5:b222a9461d6b 152 r |= _spi.write(0);
Geremia 5:b222a9461d6b 153 r <<= 1; // 32bits are aligned, now collecting bit_0
Geremia 5:b222a9461d6b 154 r |= (_spi.write(0) >> 7);
Geremia 5:b222a9461d6b 155 // we clocked 7 more bit so ILI waiting for 8th, we need to reset spi bus
Geremia 5:b222a9461d6b 156 _CS = 1; // force CS HIG to interupt the cmd
Geremia 5:b222a9461d6b 157 #ifndef USE_CS //if CS is not used, force fixed LOW again
Geremia 5:b222a9461d6b 158 _CS = 0;
Geremia 5:b222a9461d6b 159 #endif
Geremia 5:b222a9461d6b 160 return r;
Geremia 5:b222a9461d6b 161 }
Geremia 5:b222a9461d6b 162 unsigned short SPI8::rd_gram()
Geremia 5:b222a9461d6b 163 {
Geremia 5:b222a9461d6b 164 #ifdef USE_CS
Geremia 5:b222a9461d6b 165 _CS = 0;
Geremia 5:b222a9461d6b 166 #endif
Geremia 5:b222a9461d6b 167 unsigned int r=0;
Geremia 5:b222a9461d6b 168 _DC.write(1); // 1=data
Geremia 5:b222a9461d6b 169 _spi.write(0); // whole first byte is dummy
Geremia 5:b222a9461d6b 170 r |= _spi.write(0);
Geremia 5:b222a9461d6b 171 r <<= 8;
Geremia 5:b222a9461d6b 172 r |= _spi.write(0);
Geremia 5:b222a9461d6b 173 r <<= 8;
Geremia 5:b222a9461d6b 174 r |= _spi.write(0);
Geremia 5:b222a9461d6b 175 _CS = 1; // force CS HIG to interupt the "read state"
Geremia 5:b222a9461d6b 176 #ifndef USE_CS //if CS is not used, force fixed LOW again
Geremia 5:b222a9461d6b 177 _CS = 0;
Geremia 5:b222a9461d6b 178 #endif
Geremia 5:b222a9461d6b 179 // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
Geremia 5:b222a9461d6b 180 // during reading, you read the raw 18bit gram
Geremia 5:b222a9461d6b 181 r = RGB18to16((r&0xFC0000)>>16, (r&0xFC00)>>8, r&0xFC);// 18bit pixel, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
Geremia 5:b222a9461d6b 182 return (unsigned short)r;
Geremia 5:b222a9461d6b 183 }
Geremia 0:75ec1b3cde17 184 void SPI8::hw_reset()
Geremia 0:75ec1b3cde17 185 {
Geremia 0:75ec1b3cde17 186 wait_ms(15);
Geremia 0:75ec1b3cde17 187 _DC = 1;
Geremia 0:75ec1b3cde17 188 // _CS = 1;
Geremia 0:75ec1b3cde17 189 _CS = 0;
Geremia 0:75ec1b3cde17 190 _reset = 0; // display reset
Geremia 0:75ec1b3cde17 191 wait_us(50);
Geremia 0:75ec1b3cde17 192 _reset = 1; // end reset
Geremia 0:75ec1b3cde17 193 wait_ms(15);
Geremia 0:75ec1b3cde17 194 #ifndef USE_CS
Geremia 0:75ec1b3cde17 195 _CS=0; // put CS low now and forever
Geremia 0:75ec1b3cde17 196 #endif
Geremia 0:75ec1b3cde17 197 }
Geremia 0:75ec1b3cde17 198 void SPI8::BusEnable(bool enable)
Geremia 0:75ec1b3cde17 199 {
Geremia 0:75ec1b3cde17 200 _CS = enable ? 0:1;
Geremia 0:75ec1b3cde17 201 }