Stepan Smejkal / UniGraphic

.

Protocols/SPI16.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 - SPI16 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 1:ff019d22b275 19 #include "SPI16.h"
Geremia 1:ff019d22b275 20 //#define USE_CS
Geremia 1:ff019d22b275 21
Geremia 1:ff019d22b275 22 SPI16::SPI16(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC)
Geremia 1:ff019d22b275 23 : _CS(CS), _spi(mosi, miso, sclk), _reset(reset), _DC(DC)
Geremia 1:ff019d22b275 24 {
Geremia 1:ff019d22b275 25 _reset = 1;
Geremia 1:ff019d22b275 26 _DC=1;
Geremia 1:ff019d22b275 27 _CS=1;
Geremia 1:ff019d22b275 28 _spi.format(16,0); // 8 bit spi mode 0
Geremia 1:ff019d22b275 29 // _spi.frequency(12000000); // 10 Mhz SPI clock, 12mhz for F411
Geremia 1:ff019d22b275 30 _spi.frequency(Hz);
Geremia 1:ff019d22b275 31 hw_reset();
Geremia 1:ff019d22b275 32 }
Geremia 1:ff019d22b275 33
Geremia 1:ff019d22b275 34 void SPI16::wr_cmd8(unsigned char cmd)
Geremia 1:ff019d22b275 35 {
Geremia 1:ff019d22b275 36 #ifdef USE_CS
Geremia 1:ff019d22b275 37 _CS = 0;
Geremia 1:ff019d22b275 38 #endif
Geremia 1:ff019d22b275 39 _spi.format(8,0); // it takes time, better use wr_cmd16 with NOP cmd
Geremia 1:ff019d22b275 40 _DC.write(0); // 0=cmd
Geremia 1:ff019d22b275 41 _spi.write(cmd); // write 8bit
Geremia 1:ff019d22b275 42 _spi.format(16,0);
Geremia 1:ff019d22b275 43 #ifdef USE_CS
Geremia 1:ff019d22b275 44 _CS = 1;
Geremia 1:ff019d22b275 45 #endif
Geremia 1:ff019d22b275 46 }
Geremia 1:ff019d22b275 47 void SPI16::wr_data8(unsigned char data)
Geremia 1:ff019d22b275 48 {
Geremia 1:ff019d22b275 49 #ifdef USE_CS
Geremia 1:ff019d22b275 50 _CS = 0;
Geremia 1:ff019d22b275 51 #endif
Geremia 1:ff019d22b275 52 _spi.format(8,0); // it takes time, check prev cmd parameter, in case use wr_data16 with repeated byte
Geremia 1:ff019d22b275 53 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 54 _spi.write(data); // write 8bit
Geremia 1:ff019d22b275 55 _spi.format(16,0);
Geremia 1:ff019d22b275 56 #ifdef USE_CS
Geremia 1:ff019d22b275 57 _CS = 1;
Geremia 1:ff019d22b275 58 #endif
Geremia 1:ff019d22b275 59 }
Geremia 1:ff019d22b275 60 void SPI16::wr_cmd16(unsigned short cmd)
Geremia 1:ff019d22b275 61 {
Geremia 1:ff019d22b275 62 #ifdef USE_CS
Geremia 1:ff019d22b275 63 _CS = 0;
Geremia 1:ff019d22b275 64 #endif
Geremia 1:ff019d22b275 65 _DC.write(0); // 0=cmd
Geremia 1:ff019d22b275 66 _spi.write(cmd); // write 16bit
Geremia 1:ff019d22b275 67 #ifdef USE_CS
Geremia 1:ff019d22b275 68 _CS = 1;
Geremia 1:ff019d22b275 69 #endif
Geremia 1:ff019d22b275 70 }
Geremia 1:ff019d22b275 71 void SPI16::wr_data16(unsigned short data)
Geremia 1:ff019d22b275 72 {
Geremia 1:ff019d22b275 73 #ifdef USE_CS
Geremia 1:ff019d22b275 74 _CS = 0;
Geremia 1:ff019d22b275 75 #endif
Geremia 1:ff019d22b275 76 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 77 _spi.write(data); // write 16bit
Geremia 1:ff019d22b275 78 #ifdef USE_CS
Geremia 1:ff019d22b275 79 _CS = 1;
Geremia 1:ff019d22b275 80 #endif
Geremia 1:ff019d22b275 81 }
Geremia 4:12ba0ecc2c1f 82 void SPI16::wr_gram(unsigned short data)
Geremia 4:12ba0ecc2c1f 83 {
Geremia 4:12ba0ecc2c1f 84 #ifdef USE_CS
Geremia 4:12ba0ecc2c1f 85 _CS = 0;
Geremia 4:12ba0ecc2c1f 86 #endif
Geremia 4:12ba0ecc2c1f 87 _DC.write(1); // 1=data
Geremia 4:12ba0ecc2c1f 88 _spi.write(data); // write 16bit
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 SPI16::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 while(count)
Geremia 1:ff019d22b275 100 {
Geremia 1:ff019d22b275 101 _spi.write(data);
Geremia 1:ff019d22b275 102 count--;
Geremia 1:ff019d22b275 103 }
Geremia 1:ff019d22b275 104 #ifdef USE_CS
Geremia 1:ff019d22b275 105 _CS = 1;
Geremia 1:ff019d22b275 106 #endif
Geremia 1:ff019d22b275 107 }
Geremia 4:12ba0ecc2c1f 108 void SPI16::wr_grambuf(unsigned short* data, unsigned int lenght)
Geremia 1:ff019d22b275 109 {
Geremia 1:ff019d22b275 110 #ifdef USE_CS
Geremia 1:ff019d22b275 111 _CS = 0;
Geremia 1:ff019d22b275 112 #endif
Geremia 1:ff019d22b275 113 _DC.write(1); // 1=data
Geremia 1:ff019d22b275 114 while(lenght)
Geremia 1:ff019d22b275 115 {
Geremia 1:ff019d22b275 116 _spi.write(*data);
Geremia 1:ff019d22b275 117 data++;
Geremia 1:ff019d22b275 118 lenght--;
Geremia 1:ff019d22b275 119 }
Geremia 1:ff019d22b275 120 #ifdef USE_CS
Geremia 1:ff019d22b275 121 _CS = 1;
Geremia 1:ff019d22b275 122 #endif
Geremia 1:ff019d22b275 123 }
Geremia 5:b222a9461d6b 124 unsigned int SPI16::rd_data32_wdummy()
Geremia 5:b222a9461d6b 125 {
Geremia 5:b222a9461d6b 126 #ifdef USE_CS
Geremia 5:b222a9461d6b 127 _CS = 0;
Geremia 5:b222a9461d6b 128 #endif
Geremia 5:b222a9461d6b 129 unsigned int r=0;
Geremia 5:b222a9461d6b 130 _DC.write(1);; // 1=data
Geremia 5:b222a9461d6b 131
Geremia 5:b222a9461d6b 132 r |= _spi.write(0); // we get only 15bit valid, first bit was the dummy cycle
Geremia 5:b222a9461d6b 133 r <<= 16;
Geremia 5:b222a9461d6b 134 r |= _spi.write(0);
Geremia 5:b222a9461d6b 135 r <<= 1; // 32bits are aligned, now collecting bit_0
Geremia 5:b222a9461d6b 136 r |= (_spi.write(0) >> 15);
Geremia 5:b222a9461d6b 137 // we clocked 15 more bit so ILI waiting for 16th, we need to reset spi bus
Geremia 5:b222a9461d6b 138 _CS = 1; // force CS HIG to interupt the cmd
Geremia 5:b222a9461d6b 139 #ifndef USE_CS //if CS is not used, force fixed LOW again
Geremia 5:b222a9461d6b 140 _CS = 0;
Geremia 5:b222a9461d6b 141 #endif
Geremia 5:b222a9461d6b 142 return r;
Geremia 5:b222a9461d6b 143 }
Geremia 5:b222a9461d6b 144 unsigned short SPI16::rd_gram()
Geremia 5:b222a9461d6b 145 {
Geremia 5:b222a9461d6b 146 #ifdef USE_CS
Geremia 5:b222a9461d6b 147 _CS = 0;
Geremia 5:b222a9461d6b 148 #endif
Geremia 5:b222a9461d6b 149 unsigned int r=0;
Geremia 5:b222a9461d6b 150 _DC.write(1); // 1=data
Geremia 5:b222a9461d6b 151 r |= _spi.write(0); // 16bit, whole first byte is dummy, second is red
Geremia 5:b222a9461d6b 152 r <<= 16;
Geremia 5:b222a9461d6b 153 r |= _spi.write(0);
Geremia 5:b222a9461d6b 154 _CS = 1; // force CS HIG to interupt the "read state"
Geremia 5:b222a9461d6b 155 #ifndef USE_CS //if CS is not used, force fixed LOW again
Geremia 5:b222a9461d6b 156 _CS = 0;
Geremia 5:b222a9461d6b 157 #endif
Geremia 5:b222a9461d6b 158 // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
Geremia 5:b222a9461d6b 159 // during reading, you read the raw 18bit gram
Geremia 5:b222a9461d6b 160 r = RGB18to16((r&0xFC0000)>>16, (r&0xFC00)>>8, r&0xFC);// 18bit pixel, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
Geremia 5:b222a9461d6b 161 return (unsigned short)r;
Geremia 5:b222a9461d6b 162 }
Geremia 1:ff019d22b275 163 void SPI16::hw_reset()
Geremia 1:ff019d22b275 164 {
Geremia 1:ff019d22b275 165 wait_ms(15);
Geremia 1:ff019d22b275 166 _DC = 1;
Geremia 1:ff019d22b275 167 // _CS = 1;
Geremia 1:ff019d22b275 168 _CS = 0;
Geremia 1:ff019d22b275 169 _reset = 0; // display reset
Geremia 1:ff019d22b275 170 wait_us(50);
Geremia 1:ff019d22b275 171 _reset = 1; // end reset
Geremia 1:ff019d22b275 172 wait_ms(15);
Geremia 1:ff019d22b275 173 #ifndef USE_CS
Geremia 1:ff019d22b275 174 _CS=0; // put CS low now and forever
Geremia 1:ff019d22b275 175 #endif
Geremia 1:ff019d22b275 176 }
Geremia 1:ff019d22b275 177 void SPI16::BusEnable(bool enable)
Geremia 1:ff019d22b275 178 {
Geremia 1:ff019d22b275 179 _CS = enable ? 0:1;
Geremia 1:ff019d22b275 180 }