Satyan Raj / UniGraphic

test

Fork of UniGraphic by GraphicsDisplay

Protocols/SPI16.cpp@23:70790fa6e0ca, 2015-09-21 (annotated)

Committer:
satyanraj
Date:
Mon Sep 21 15:48:50 2015 +0000
Revision:
23:70790fa6e0ca
Parent:
20:14daa48ffd4c 
test commit

Who changed what in which revision?

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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
Geremia 1:ff019d22b275 21 SPI16::SPI16(int Hz, PinName mosi, PinName miso, PinName sclk, PinName CS, PinName reset, PinName DC)
Geremia 1:ff019d22b275 22 : _CS(CS), _spi(mosi, miso, sclk), _reset(reset), _DC(DC)
Geremia 1:ff019d22b275 23 {
Geremia 1:ff019d22b275 24 _reset = 1;
Geremia 1:ff019d22b275 25 _DC=1;
Geremia 1:ff019d22b275 26 _CS=1;
Geremia 1:ff019d22b275 27 _spi.format(16,0); // 8 bit spi mode 0
Geremia 1:ff019d22b275 28 // _spi.frequency(12000000); // 10 Mhz SPI clock, 12mhz for F411
Geremia 1:ff019d22b275 29 _spi.frequency(Hz);
Geremia 1:ff019d22b275 30 hw_reset();
Geremia 1:ff019d22b275 31 }
Geremia 1:ff019d22b275 32
Geremia 1:ff019d22b275 33 void SPI16::wr_cmd8(unsigned char cmd)
Geremia 1:ff019d22b275 34 {
Geremia 1:ff019d22b275 35 _spi.format(8,0); // it takes time, better use wr_cmd16 with NOP cmd
Geremia 1:ff019d22b275 36 _DC.write(0); // 0=cmd
Geremia 1:ff019d22b275 37 _spi.write(cmd); // write 8bit
Geremia 1:ff019d22b275 38 _spi.format(16,0);
Geremia 20:14daa48ffd4c 39 _DC.write(1); // 1=data next
Geremia 1:ff019d22b275 40 }
Geremia 1:ff019d22b275 41 void SPI16::wr_data8(unsigned char data)
Geremia 1:ff019d22b275 42 {
Geremia 1:ff019d22b275 43 _spi.format(8,0); // it takes time, check prev cmd parameter, in case use wr_data16 with repeated byte
Geremia 1:ff019d22b275 44 _spi.write(data); // write 8bit
Geremia 1:ff019d22b275 45 _spi.format(16,0);
Geremia 1:ff019d22b275 46 }
Geremia 1:ff019d22b275 47 void SPI16::wr_cmd16(unsigned short cmd)
Geremia 20:14daa48ffd4c 48 {
Geremia 1:ff019d22b275 49 _DC.write(0); // 0=cmd
Geremia 1:ff019d22b275 50 _spi.write(cmd); // write 16bit
Geremia 20:14daa48ffd4c 51 _DC.write(1); // 1=data next
Geremia 1:ff019d22b275 52 }
Geremia 1:ff019d22b275 53 void SPI16::wr_data16(unsigned short data)
Geremia 1:ff019d22b275 54 {
Geremia 1:ff019d22b275 55 _spi.write(data); // write 16bit
Geremia 1:ff019d22b275 56 }
Geremia 4:12ba0ecc2c1f 57 void SPI16::wr_gram(unsigned short data)
Geremia 4:12ba0ecc2c1f 58 {
Geremia 4:12ba0ecc2c1f 59 _spi.write(data); // write 16bit
Geremia 4:12ba0ecc2c1f 60 }
Geremia 4:12ba0ecc2c1f 61 void SPI16::wr_gram(unsigned short data, unsigned int count)
Geremia 1:ff019d22b275 62 {
Geremia 1:ff019d22b275 63 while(count)
Geremia 1:ff019d22b275 64 {
Geremia 1:ff019d22b275 65 _spi.write(data);
Geremia 1:ff019d22b275 66 count--;
Geremia 1:ff019d22b275 67 }
Geremia 1:ff019d22b275 68 }
Geremia 4:12ba0ecc2c1f 69 void SPI16::wr_grambuf(unsigned short* data, unsigned int lenght)
Geremia 1:ff019d22b275 70 {
Geremia 1:ff019d22b275 71 while(lenght)
Geremia 1:ff019d22b275 72 {
Geremia 1:ff019d22b275 73 _spi.write(*data);
Geremia 1:ff019d22b275 74 data++;
Geremia 1:ff019d22b275 75 lenght--;
Geremia 1:ff019d22b275 76 }
Geremia 1:ff019d22b275 77 }
Geremia 11:b842b8e332cb 78 unsigned short SPI16::rd_gram(bool convert)
Geremia 5:b222a9461d6b 79 {
Geremia 5:b222a9461d6b 80 unsigned int r=0;
Geremia 5:b222a9461d6b 81 r |= _spi.write(0); // 16bit, whole first byte is dummy, second is red
Geremia 5:b222a9461d6b 82 r <<= 16;
Geremia 5:b222a9461d6b 83 r |= _spi.write(0);
Geremia 11:b842b8e332cb 84 if(convert)
Geremia 11:b842b8e332cb 85 {
Geremia 11:b842b8e332cb 86 // gram is 18bit/pixel, if you set 16bit/pixel (cmd 3A), during writing the 16bits are expanded to 18bit
Geremia 11:b842b8e332cb 87 // during reading, you read the raw 18bit gram
Geremia 11:b842b8e332cb 88 r = RGB24to16((r&0xFF0000)>>16, (r&0xFF00)>>8, r&0xFF);// 18bit pixel padded to 24bits, rrrrrr00_gggggg00_bbbbbb00, converted to 16bit
Geremia 11:b842b8e332cb 89 }
Geremia 11:b842b8e332cb 90 else r >>= 8;
Geremia 20:14daa48ffd4c 91 _CS = 1; // force CS HIG to interupt the "read state"
Geremia 5:b222a9461d6b 92 _CS = 0;
Geremia 20:14daa48ffd4c 93
Geremia 5:b222a9461d6b 94 return (unsigned short)r;
Geremia 5:b222a9461d6b 95 }
Geremia 7:bb0383b91104 96 unsigned int SPI16::rd_reg_data32(unsigned char reg)
Geremia 7:bb0383b91104 97 {
Geremia 7:bb0383b91104 98 wr_cmd8(reg);
Geremia 7:bb0383b91104 99 unsigned int r=0;
Geremia 7:bb0383b91104 100
Geremia 7:bb0383b91104 101 r |= _spi.write(0); // we get only 15bit valid, first bit was the dummy cycle
Geremia 7:bb0383b91104 102 r <<= 16;
Geremia 7:bb0383b91104 103 r |= _spi.write(0);
Geremia 7:bb0383b91104 104 r <<= 1; // 32bits are aligned, now collecting bit_0
Geremia 7:bb0383b91104 105 r |= (_spi.write(0) >> 15);
Geremia 7:bb0383b91104 106 // we clocked 15 more bit so ILI waiting for 16th, we need to reset spi bus
Geremia 7:bb0383b91104 107 _CS = 1; // force CS HIG to interupt the cmd
Geremia 7:bb0383b91104 108 _CS = 0;
Geremia 7:bb0383b91104 109 return r;
Geremia 7:bb0383b91104 110 }
Geremia 7:bb0383b91104 111 unsigned int SPI16::rd_extcreg_data32(unsigned char reg, unsigned char SPIreadenablecmd)
Geremia 7:bb0383b91104 112 {
Geremia 7:bb0383b91104 113 unsigned int r=0;
Geremia 7:bb0383b91104 114 for(int regparam=1; regparam<4; regparam++) // when reading EXTC regs, first parameter is always dummy, so start with 1
Geremia 7:bb0383b91104 115 {
Geremia 7:bb0383b91104 116 wr_cmd8(SPIreadenablecmd); // spi-in enable cmd, 0xD9 (ili9341) or 0xFB (ili9488) or don't know
Geremia 7:bb0383b91104 117 wr_data8(0xF0|regparam); // in low nibble specify which reg parameter we want
Geremia 7:bb0383b91104 118 wr_cmd8(reg); // now send cmd (select register we want to read)
Geremia 7:bb0383b91104 119 r <<= 8;
Geremia 7:bb0383b91104 120 r |= (_spi.write(0) >> 8);
Geremia 7:bb0383b91104 121 }
Geremia 20:14daa48ffd4c 122 _CS = 1; // force CS HIG to interupt the cmd
Geremia 7:bb0383b91104 123 _CS = 0;
Geremia 20:14daa48ffd4c 124
Geremia 7:bb0383b91104 125 return r;
Geremia 7:bb0383b91104 126 }
Geremia 20:14daa48ffd4c 127 // ILI932x specific
Geremia 20:14daa48ffd4c 128 void SPI16::dummyread()
Geremia 20:14daa48ffd4c 129 {
Geremia 20:14daa48ffd4c 130 _spi.write(0); // dummy read
Geremia 20:14daa48ffd4c 131 }
Geremia 20:14daa48ffd4c 132 // ILI932x specific
Geremia 20:14daa48ffd4c 133 void SPI16::reg_select(unsigned char reg, bool forread)
Geremia 20:14daa48ffd4c 134 {
Geremia 20:14daa48ffd4c 135 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 136 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 137 _spi.write(0x70); // write 0070
Geremia 20:14daa48ffd4c 138 _spi.write(reg); // write 16bit
Geremia 20:14daa48ffd4c 139 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 140 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 141 if(forread) _spi.write(0x73);
Geremia 20:14daa48ffd4c 142 else _spi.write(0x72);
Geremia 20:14daa48ffd4c 143 }
Geremia 20:14daa48ffd4c 144 // ILI932x specific
Geremia 20:14daa48ffd4c 145 void SPI16::reg_write(unsigned char reg, unsigned short data)
Geremia 20:14daa48ffd4c 146 {
Geremia 20:14daa48ffd4c 147 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 148 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 149 _spi.write(0x70); // write 0070
Geremia 20:14daa48ffd4c 150 _spi.write(reg); // write 16bit
Geremia 20:14daa48ffd4c 151 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 152 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 153 _spi.write(0x72); // write 0072
Geremia 20:14daa48ffd4c 154 _spi.write(data); // write 16bit
Geremia 20:14daa48ffd4c 155 }
Geremia 20:14daa48ffd4c 156 // ILI932x specific
Geremia 20:14daa48ffd4c 157 unsigned short SPI16::reg_read(unsigned char reg)
Geremia 20:14daa48ffd4c 158 {
Geremia 20:14daa48ffd4c 159 unsigned int r=0;
Geremia 20:14daa48ffd4c 160 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 161 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 162 _spi.write(0x70); // write 0070
Geremia 20:14daa48ffd4c 163 _spi.write(reg); // write 16bit
Geremia 20:14daa48ffd4c 164 _CS = 1; //fixme: really needed?
Geremia 20:14daa48ffd4c 165 _CS = 0; //fixme: really needed?
Geremia 20:14daa48ffd4c 166 _spi.write(0x73); // write 0073
Geremia 20:14daa48ffd4c 167 r |= _spi.write(0); // read 16bit, 8bit dummy + 8bit valid
Geremia 20:14daa48ffd4c 168 r <<= 16;
Geremia 20:14daa48ffd4c 169 r |= _spi.write(0); // read 16bit
Geremia 20:14daa48ffd4c 170
Geremia 20:14daa48ffd4c 171 _CS = 1; //fixme: to resync, maybe really needed
Geremia 20:14daa48ffd4c 172 _CS = 0; //fixme: to resync, maybe really needed
Geremia 20:14daa48ffd4c 173 return (r>>8);
Geremia 20:14daa48ffd4c 174 }
Geremia 1:ff019d22b275 175 void SPI16::hw_reset()
Geremia 1:ff019d22b275 176 {
Geremia 1:ff019d22b275 177 wait_ms(15);
Geremia 1:ff019d22b275 178 _DC = 1;
Geremia 20:14daa48ffd4c 179 _CS = 1;
Geremia 1:ff019d22b275 180 _reset = 0; // display reset
Geremia 20:14daa48ffd4c 181 wait_ms(2);
Geremia 1:ff019d22b275 182 _reset = 1; // end reset
Geremia 20:14daa48ffd4c 183 wait_ms(100);
Geremia 1:ff019d22b275 184 }
Geremia 1:ff019d22b275 185 void SPI16::BusEnable(bool enable)
Geremia 1:ff019d22b275 186 {
Geremia 1:ff019d22b275 187 _CS = enable ? 0:1;
Geremia 1:ff019d22b275 188 }