Diff: Adafruit_ST7735.cpp

Revision:

0:99ee879ef5a9

Child:

1:226fd3534967

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_ST7735.cpp	Tue Mar 26 23:09:06 2013 +0000
@@ -0,0 +1,452 @@
+/***************************************************
+  This is a library for the Adafruit 1.8" SPI display.
+  This library works with the Adafruit 1.8" TFT Breakout w/SD card
+  ----> http://www.adafruit.com/products/358
+  as well as Adafruit raw 1.8" TFT display
+  ----> http://www.adafruit.com/products/618
+
+  Check out the links above for our tutorials and wiring diagrams
+  These displays use SPI to communicate, 4 or 5 pins are required to
+  interface (RST is optional)
+  Adafruit invests time and resources providing this open source code,
+  please support Adafruit and open-source hardware by purchasing
+  products from Adafruit!
+
+  Written by Limor Fried/Ladyada for Adafruit Industries.
+  MIT license, all text above must be included in any redistribution
+ ****************************************************/
+
+#include "mbed.h"
+#include "Adafruit_ST7735.h"
+
+
+// Constructor 
+Adafruit_ST7735::Adafruit_ST7735(PinName mosi, PinName miso, PinName sck, PinName cs, PinName rs, PinName rst) 
+        : lcdPort(mosi, miso, sck), _cs(cs), _rs(rs), _rst(rst)
+{ }
+
+
+void Adafruit_ST7735::writecommand(uint8_t c)
+{
+    _rs = 0;
+    _cs = 0;
+    lcdPort.write( c );
+    _cs = 1;
+}
+
+
+void Adafruit_ST7735::writedata(uint8_t c)
+{
+    _rs = 1;
+    _cs = 0;
+    lcdPort.write( c );
+
+    _cs = 1;
+}
+
+
+// Rather than a bazillion writecommand() and writedata() calls, screen
+// initialization commands and arguments are organized in these tables
+// stored in PROGMEM.  The table may look bulky, but that's mostly the
+// formatting -- storage-wise this is hundreds of bytes more compact
+// than the equivalent code.  Companion function follows.
+#define DELAY 0x80
+static unsigned char
+Bcmd[] = {                  // Initialization commands for 7735B screens
+    18,                       // 18 commands in list:
+    ST7735_SWRESET,   DELAY,  //  1: Software reset, no args, w/delay
+    50,                     //     50 ms delay
+    ST7735_SLPOUT ,   DELAY,  //  2: Out of sleep mode, no args, w/delay
+    255,                    //     255 = 500 ms delay
+    ST7735_COLMOD , 1+DELAY,  //  3: Set color mode, 1 arg + delay:
+    0x05,                   //     16-bit color
+    10,                     //     10 ms delay
+    ST7735_FRMCTR1, 3+DELAY,  //  4: Frame rate control, 3 args + delay:
+    0x00,                   //     fastest refresh
+    0x06,                   //     6 lines front porch
+    0x03,                   //     3 lines back porch
+    10,                     //     10 ms delay
+    ST7735_MADCTL , 1      ,  //  5: Memory access ctrl (directions), 1 arg:
+    0x08,                   //     Row addr/col addr, bottom to top refresh
+    ST7735_DISSET5, 2      ,  //  6: Display settings #5, 2 args, no delay:
+    0x15,                   //     1 clk cycle nonoverlap, 2 cycle gate
+    //     rise, 3 cycle osc equalize
+    0x02,                   //     Fix on VTL
+    ST7735_INVCTR , 1      ,  //  7: Display inversion control, 1 arg:
+    0x0,                    //     Line inversion
+    ST7735_PWCTR1 , 2+DELAY,  //  8: Power control, 2 args + delay:
+    0x02,                   //     GVDD = 4.7V
+    0x70,                   //     1.0uA
+    10,                     //     10 ms delay
+    ST7735_PWCTR2 , 1      ,  //  9: Power control, 1 arg, no delay:
+    0x05,                   //     VGH = 14.7V, VGL = -7.35V
+    ST7735_PWCTR3 , 2      ,  // 10: Power control, 2 args, no delay:
+    0x01,                   //     Opamp current small
+    0x02,                   //     Boost frequency
+    ST7735_VMCTR1 , 2+DELAY,  // 11: Power control, 2 args + delay:
+    0x3C,                   //     VCOMH = 4V
+    0x38,                   //     VCOML = -1.1V
+    10,                     //     10 ms delay
+    ST7735_PWCTR6 , 2      ,  // 12: Power control, 2 args, no delay:
+    0x11, 0x15,
+    ST7735_GMCTRP1,16      ,  // 13: Magical unicorn dust, 16 args, no delay:
+    0x09, 0x16, 0x09, 0x20, //     (seriously though, not sure what
+    0x21, 0x1B, 0x13, 0x19, //      these config values represent)
+    0x17, 0x15, 0x1E, 0x2B,
+    0x04, 0x05, 0x02, 0x0E,
+    ST7735_GMCTRN1,16+DELAY,  // 14: Sparkles and rainbows, 16 args + delay:
+    0x0B, 0x14, 0x08, 0x1E, //     (ditto)
+    0x22, 0x1D, 0x18, 0x1E,
+    0x1B, 0x1A, 0x24, 0x2B,
+    0x06, 0x06, 0x02, 0x0F,
+    10,                     //     10 ms delay
+    ST7735_CASET  , 4      ,  // 15: Column addr set, 4 args, no delay:
+    0x00, 0x02,             //     XSTART = 2
+    0x00, 0x81,             //     XEND = 129
+    ST7735_RASET  , 4      ,  // 16: Row addr set, 4 args, no delay:
+    0x00, 0x02,             //     XSTART = 1
+    0x00, 0x81,             //     XEND = 160
+    ST7735_NORON  ,   DELAY,  // 17: Normal display on, no args, w/delay
+    10,                     //     10 ms delay
+    ST7735_DISPON ,   DELAY,  // 18: Main screen turn on, no args, w/delay
+    255
+},                  //     255 = 500 ms delay
+
+Rcmd1[] = {                 // Init for 7735R, part 1 (red or green tab)
+    15,                       // 15 commands in list:
+    ST7735_SWRESET,   DELAY,  //  1: Software reset, 0 args, w/delay
+    150,                    //     150 ms delay
+    ST7735_SLPOUT ,   DELAY,  //  2: Out of sleep mode, 0 args, w/delay
+    255,                    //     500 ms delay
+    ST7735_FRMCTR1, 3      ,  //  3: Frame rate ctrl - normal mode, 3 args:
+    0x01, 0x2C, 0x2D,       //     Rate = fosc/(1x2+40) * (LINE+2C+2D)
+    ST7735_FRMCTR2, 3      ,  //  4: Frame rate control - idle mode, 3 args:
+    0x01, 0x2C, 0x2D,       //     Rate = fosc/(1x2+40) * (LINE+2C+2D)
+    ST7735_FRMCTR3, 6      ,  //  5: Frame rate ctrl - partial mode, 6 args:
+    0x01, 0x2C, 0x2D,       //     Dot inversion mode
+    0x01, 0x2C, 0x2D,       //     Line inversion mode
+    ST7735_INVCTR , 1      ,  //  6: Display inversion ctrl, 1 arg, no delay:
+    0x07,                   //     No inversion
+    ST7735_PWCTR1 , 3      ,  //  7: Power control, 3 args, no delay:
+    0xA2,
+    0x02,                   //     -4.6V
+    0x84,                   //     AUTO mode
+    ST7735_PWCTR2 , 1      ,  //  8: Power control, 1 arg, no delay:
+    0xC5,                   //     VGH25 = 2.4C VGSEL = -10 VGH = 3 * AVDD
+    ST7735_PWCTR3 , 2      ,  //  9: Power control, 2 args, no delay:
+    0x0A,                   //     Opamp current small
+    0x00,                   //     Boost frequency
+    ST7735_PWCTR4 , 2      ,  // 10: Power control, 2 args, no delay:
+    0x8A,                   //     BCLK/2, Opamp current small & Medium low
+    0x2A,
+    ST7735_PWCTR5 , 2      ,  // 11: Power control, 2 args, no delay:
+    0x8A, 0xEE,
+    ST7735_VMCTR1 , 1      ,  // 12: Power control, 1 arg, no delay:
+    0x0E,
+    ST7735_INVOFF , 0      ,  // 13: Don't invert display, no args, no delay
+    ST7735_MADCTL , 1      ,  // 14: Memory access control (directions), 1 arg:
+    0xC8,                   //     row addr/col addr, bottom to top refresh
+    ST7735_COLMOD , 1      ,  // 15: set color mode, 1 arg, no delay:
+    0x05
+},                 //     16-bit color
+
+Rcmd2green[] = {            // Init for 7735R, part 2 (green tab only)
+    2,                        //  2 commands in list:
+    ST7735_CASET  , 4      ,  //  1: Column addr set, 4 args, no delay:
+    0x00, 0x02,             //     XSTART = 0
+    0x00, 0x7F+0x02,        //     XEND = 127
+    ST7735_RASET  , 4      ,  //  2: Row addr set, 4 args, no delay:
+    0x00, 0x01,             //     XSTART = 0
+    0x00, 0x9F+0x01
+},      //     XEND = 159
+Rcmd2red[] = {              // Init for 7735R, part 2 (red tab only)
+    2,                        //  2 commands in list:
+    ST7735_CASET  , 4      ,  //  1: Column addr set, 4 args, no delay:
+    0x00, 0x00,             //     XSTART = 0
+    0x00, 0x7F,             //     XEND = 127
+    ST7735_RASET  , 4      ,  //  2: Row addr set, 4 args, no delay:
+    0x00, 0x00,             //     XSTART = 0
+    0x00, 0x9F
+},           //     XEND = 159
+
+Rcmd3[] = {                 // Init for 7735R, part 3 (red or green tab)
+    4,                        //  4 commands in list:
+    ST7735_GMCTRP1, 16      , //  1: Magical unicorn dust, 16 args, no delay:
+    0x02, 0x1c, 0x07, 0x12,
+    0x37, 0x32, 0x29, 0x2d,
+    0x29, 0x25, 0x2B, 0x39,
+    0x00, 0x01, 0x03, 0x10,
+    ST7735_GMCTRN1, 16      , //  2: Sparkles and rainbows, 16 args, no delay:
+    0x03, 0x1d, 0x07, 0x06,
+    0x2E, 0x2C, 0x29, 0x2D,
+    0x2E, 0x2E, 0x37, 0x3F,
+    0x00, 0x00, 0x02, 0x10,
+    ST7735_NORON  ,    DELAY, //  3: Normal display on, no args, w/delay
+    10,                     //     10 ms delay
+    ST7735_DISPON ,    DELAY, //  4: Main screen turn on, no args w/delay
+    100
+};                  //     100 ms delay
+
+
+// Companion code to the above tables.  Reads and issues
+// a series of LCD commands stored in byte array.
+void Adafruit_ST7735::commandList(uint8_t *addr)
+{
+
+    uint8_t  numCommands, numArgs;
+    uint16_t ms;
+
+    numCommands = *addr++;   // Number of commands to follow
+    while(numCommands--) {                 // For each command...
+        writecommand(*addr++); //   Read, issue command
+        numArgs  = *addr++;    //   Number of args to follow
+        ms       = numArgs & DELAY;          //   If hibit set, delay follows args
+        numArgs &= ~DELAY;                   //   Mask out delay bit
+        while(numArgs--) {                   //   For each argument...
+            writedata(*addr++);  //     Read, issue argument
+        }
+
+        if(ms) {
+            ms = *addr++; // Read post-command delay time (ms)
+            if(ms == 255) ms = 500;     // If 255, delay for 500 ms
+            wait_ms(ms);
+        }
+    }
+}
+
+
+// Initialization code common to both 'B' and 'R' type displays
+void Adafruit_ST7735::commonInit(uint8_t *cmdList)
+{
+
+    constructor(ST7735_TFTWIDTH, ST7735_TFTHEIGHT);
+    colstart  = rowstart = 0; // May be overridden in init func
+
+    _rs = 1;
+    _cs = 1;
+
+    // use default SPI format
+    lcdPort.format(8,0);
+    lcdPort.frequency(20000000);     // Lets try 8MHz
+
+    // toggle RST low to reset; CS low so it'll listen to us
+    _cs = 0;
+    _rst = 1;
+    wait_ms(500);
+    _rst = 0;
+    wait_ms(500);
+    _rst = 1;
+    wait_ms(500);
+
+    if(cmdList) commandList(cmdList);
+}
+
+
+// Initialization for ST7735B screens
+void Adafruit_ST7735::initB(void)
+{
+    commonInit(Bcmd);
+}
+
+
+// Initialization for ST7735R screens (green or red tabs)
+void Adafruit_ST7735::initR(uint8_t options)
+{
+    commonInit(Rcmd1);
+    if(options == INITR_GREENTAB) {
+        commandList(Rcmd2green);
+        colstart = 2;
+        rowstart = 1;
+    } else {
+        // colstart, rowstart left at default '0' values
+        commandList(Rcmd2red);
+    }
+    commandList(Rcmd3);
+}
+
+
+void Adafruit_ST7735::setAddrWindow(uint8_t x0, uint8_t y0, uint8_t x1,
+                                    uint8_t y1)
+{
+
+    writecommand(ST7735_CASET); // Column addr set
+    writedata(0x00);
+    writedata(x0+colstart);     // XSTART
+    writedata(0x00);
+    writedata(x1+colstart);     // XEND
+
+    writecommand(ST7735_RASET); // Row addr set
+    writedata(0x00);
+    writedata(y0+rowstart);     // YSTART
+    writedata(0x00);
+    writedata(y1+rowstart);     // YEND
+
+    writecommand(ST7735_RAMWR); // write to RAM
+}
+
+
+void Adafruit_ST7735::fillScreen(uint16_t color)
+{
+
+    uint8_t x, y, hi = color >> 8, lo = color;
+
+    setAddrWindow(0, 0, _width-1, _height-1);
+
+    _rs = 1;
+    _cs = 0;
+
+    for(y=_height; y>0; y--) {
+        for(x=_width; x>0; x--) {
+            lcdPort.write( hi );
+            lcdPort.write( lo );
+        }
+    }
+
+    _cs = 1;
+}
+
+
+void Adafruit_ST7735::pushColor(uint16_t color)
+{
+    _rs = 1;
+    _cs = 0;
+
+    lcdPort.write( color >> 8 );
+    lcdPort.write( color );
+    _cs = 1;
+}
+
+
+void Adafruit_ST7735::drawPixel(int16_t x, int16_t y, uint16_t color)
+{
+
+    if((x < 0) ||(x >= _width) || (y < 0) || (y >= _height)) return;
+
+    setAddrWindow(x,y,x+1,y+1);
+
+    _rs = 1;
+    _cs = 0;
+
+    lcdPort.write( color >> 8 );
+    lcdPort.write( color );
+
+    _cs = 1;
+}
+
+
+void Adafruit_ST7735::drawFastVLine(int16_t x, int16_t y, int16_t h,
+                                    uint16_t color)
+{
+
+    // Rudimentary clipping
+    if((x >= _width) || (y >= _height)) return;
+    if((y+h-1) >= _height) h = _height-y;
+    setAddrWindow(x, y, x, y+h-1);
+
+    uint8_t hi = color >> 8, lo = color;
+    _rs = 1;
+    _cs = 0;
+    while (h--) {
+        lcdPort.write( hi );
+        lcdPort.write( lo );
+    }
+    _cs = 1;
+}
+
+
+void Adafruit_ST7735::drawFastHLine(int16_t x, int16_t y, int16_t w,
+                                    uint16_t color)
+{
+
+    // Rudimentary clipping
+    if((x >= _width) || (y >= _height)) return;
+    if((x+w-1) >= _width)  w = _width-x;
+    setAddrWindow(x, y, x+w-1, y);
+
+    uint8_t hi = color >> 8, lo = color;
+    _rs = 1;
+    _cs = 0;
+    while (w--) {
+        lcdPort.write( hi );
+        lcdPort.write( lo );
+    }
+    _cs = 1;
+}
+
+
+// fill a rectangle
+void Adafruit_ST7735::fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
+                               uint16_t color)
+{
+
+    // rudimentary clipping (drawChar w/big text requires this)
+    if((x >= _width) || (y >= _height)) return;
+    if((x + w - 1) >= _width)  w = _width  - x;
+    if((y + h - 1) >= _height) h = _height - y;
+
+    setAddrWindow(x, y, x+w-1, y+h-1);
+
+    uint8_t hi = color >> 8, lo = color;
+    _rs = 1;
+    _cs = 0;
+    for(y=h; y>0; y--) {
+        for(x=w; x>0; x--) {
+            lcdPort.write( hi );
+            lcdPort.write( lo );
+        }
+    }
+
+    _cs = 1;
+}
+
+
+// Pass 8-bit (each) R,G,B, get back 16-bit packed color
+uint16_t Adafruit_ST7735::Color565(uint8_t r, uint8_t g, uint8_t b)
+{
+    return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
+}
+
+
+#define MADCTL_MY  0x80
+#define MADCTL_MX  0x40
+#define MADCTL_MV  0x20
+#define MADCTL_ML  0x10
+#define MADCTL_RGB 0x08
+#define MADCTL_MH  0x04
+
+void Adafruit_ST7735::setRotation(uint8_t m)
+{
+
+    writecommand(ST7735_MADCTL);
+    rotation = m % 4; // can't be higher than 3
+    switch (rotation) {
+        case 0:
+            writedata(MADCTL_MX | MADCTL_MY | MADCTL_RGB);
+            _width  = ST7735_TFTWIDTH;
+            _height = ST7735_TFTHEIGHT;
+            break;
+        case 1:
+            writedata(MADCTL_MY | MADCTL_MV | MADCTL_RGB);
+            _width  = ST7735_TFTHEIGHT;
+            _height = ST7735_TFTWIDTH;
+            break;
+        case 2:
+            writedata(MADCTL_RGB);
+            _width  = ST7735_TFTWIDTH;
+            _height = ST7735_TFTHEIGHT;
+            break;
+        case 3:
+            writedata(MADCTL_MX | MADCTL_MV | MADCTL_RGB);
+            _width  = ST7735_TFTHEIGHT;
+            _height = ST7735_TFTWIDTH;
+            break;
+    }
+}
+
+
+void Adafruit_ST7735::invertDisplay(boolean i)
+{
+    writecommand(i ? ST7735_INVON : ST7735_INVOFF);
+}
+
+