Roland Kamp
Library for 1.8 inch 160*180 TFT Display. Nice fonts in different formats.
Diff: ST7735.cpp
- Revision:
- 0:3015b613b20d
- Child:
- 1:6a6d8d2b19f1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ST7735.cpp Sat Aug 15 10:58:51 2015 +0000
@@ -0,0 +1,1034 @@
+#include "mbed.h"
+#include "ST7735.h"
+
+#ifdef LOAD_FONT2
+ #include "Font16.h"
+#endif
+
+#ifdef LOAD_FONT4
+#include "Font32.h"
+#endif
+
+#ifdef LOAD_FONT6
+#include "Font64.h"
+#endif
+
+#ifdef LOAD_FONT7
+ #include "Font7s.h"
+#endif
+
+#ifdef LOAD_FONT8
+ #include "Font72.h"
+#endif
+
+
+ST7735::ST7735(PinName cePin, PinName dcPin, PinName mosiPin, PinName sclkPin)
+{
+ spi = new SPI(mosiPin, NC, sclkPin); // create new SPI instance and initialise
+ initSPI();
+
+ // set up other pins as required
+ ce = new DigitalOut(cePin,1);
+ dc = new DigitalOut(dcPin,0);
+
+
+}
+
+// function to initialise SPI peripheral
+void ST7735::initSPI()
+{
+ spi->format(8,0); // 8 bits, Mode 0
+ spi->frequency(12000000); // SPI clock frequency
+ //spi->frequency(4000000); // SPI clock frequency
+ //spi->frequency(22000000); // SPI clock frequency 20.83 Mhz
+}
+
+// Write data word
+void ST7735::writecommand(char c)
+{
+ dc->write(0);
+ ce->write(0);
+ spi->write(c);
+ ce->write(1);
+}
+
+// Write command word
+void ST7735::writedata(char c)
+{
+ dc->write(1);
+ ce->write(0);
+ spi->write(c);
+ ce->write(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 const uint8_t 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 PROGMEM byte array.
+void ST7735::commandList(const uint8_t *addr){
+ uint8_t numCommands, numArgs;
+ uint16_t ms;
+
+ numCommands = pgm_read_byte(addr++); // Number of commands to follow
+ while(numCommands--) { // For each command...
+ writecommand(pgm_read_byte(addr++)); // Read, issue command
+ numArgs = pgm_read_byte(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(pgm_read_byte(addr++)); // Read, issue argument
+ }
+
+ if(ms) {
+ ms = pgm_read_byte(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 ST7735::commonInit(const uint8_t *cmdList){
+ wait_ms(50); // Wait for reset to be stable after power-up
+ colstart = rowstart = 0; // May be overridden in init func
+ if(cmdList) commandList(cmdList);
+}
+
+// Initialization for ST7735B screens
+void ST7735::initB() {
+ commonInit(Bcmd);
+}
+
+// Initialization for ST7735R screens (green or red tabs)
+void 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);
+
+ // if black, change MADCTL color filter
+ if (options == INITR_BLACKTAB) {
+ writecommand(ST7735_MADCTL);
+ writedata(0xC0);
+ }
+
+ tabcolor = options;
+}
+
+void ST7735::setRotation(uint8_t m) {
+
+ writecommand(ST7735_MADCTL);
+ rotation = m % 4; // can't be higher than 3
+ switch (rotation) {
+ case 0:
+ if (tabcolor == INITR_BLACKTAB) {
+ writedata(MADCTL_MX | MADCTL_MY | MADCTL_RGB);
+ } else {
+ writedata(MADCTL_MX | MADCTL_MY | MADCTL_BGR);
+ }
+ _width = ST7735_TFTWIDTH;
+ _height = ST7735_TFTHEIGHT;
+ break;
+ case 1:
+ if (tabcolor == INITR_BLACKTAB) {
+ writedata(MADCTL_MY | MADCTL_MV | MADCTL_RGB);
+ } else {
+ writedata(MADCTL_MY | MADCTL_MV | MADCTL_BGR);
+ }
+ _width = ST7735_TFTHEIGHT;
+ _height = ST7735_TFTWIDTH;
+ break;
+ case 2:
+ if (tabcolor == INITR_BLACKTAB) {
+ writedata(MADCTL_RGB);
+ } else {
+ writedata(MADCTL_BGR);
+ }
+ _width = ST7735_TFTWIDTH;
+ _height = ST7735_TFTHEIGHT;
+ break;
+ case 3:
+ if (tabcolor == INITR_BLACKTAB) {
+ writedata(MADCTL_MX | MADCTL_MV | MADCTL_RGB);
+ } else {
+ writedata(MADCTL_MX | MADCTL_MV | MADCTL_BGR);
+ }
+ _width = ST7735_TFTHEIGHT;
+ _height = ST7735_TFTWIDTH;
+ break;
+ }
+}
+
+void ST7735::fillScreen(uint16_t color) {
+ fillRect(0, 0, _width, _height, color);
+}
+
+
+
+void ST7735::pushColor(uint16_t color) {
+ dc->write(1);
+ ce->write(0);
+ spi->write(color >> 8);
+ spi->write(color);
+ ce->write(1);
+}
+
+// fill a rectangle
+void 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;
+
+ dc->write(1);
+ ce->write(0);
+
+ for(y=h; y>0; y--) {
+ for(x=w; x>0; x--) {
+ spi->write(hi);
+ spi->write(lo);
+ }
+ }
+ ce->write(1);
+}
+
+
+
+void ST7735::invertDisplay(bool i) {
+ writecommand(i ? ST7735_INVON : ST7735_INVOFF);
+}
+
+void 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);
+ dc->write(1);
+ ce->write(0);
+ spi->write(color >> 8);
+ spi->write(color);
+ ce->write(1);
+}
+
+void 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;
+
+ dc->write(1);
+ ce->write(0);
+ while (h--) {
+ spi->write(hi);
+ spi->write(lo);
+ }
+ ce->write(1);
+}
+
+void 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;
+
+ dc->write(1);;
+ ce->write(0);;
+
+ while (w--) {
+ spi->write(hi);
+ spi->write(lo);
+ }
+
+ ce->write(1);
+}
+
+// Pass 8-bit (each) R,G,B, get back 16-bit packed color
+uint16_t ST7735::Color565(uint8_t r, uint8_t g, uint8_t b) {
+ return ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3);
+}
+
+// Bresenham's algorithm - thx wikpedia
+void ST7735::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color) {
+ int16_t steep = abs(y1 - y0) > abs(x1 - x0);
+ if (steep) {
+ swap(x0, y0);
+ swap(x1, y1);
+ }
+
+ if (x0 > x1) {
+ swap(x0, x1);
+ swap(y0, y1);
+ }
+
+ int16_t dx, dy;
+ dx = x1 - x0;
+ dy = abs(y1 - y0);
+
+ int16_t err = dx / 2;
+ int16_t ystep;
+
+ if (y0 < y1) {
+ ystep = 1;
+ } else {
+ ystep = -1;
+ }
+
+ for (; x0<=x1; x0++) {
+ if (steep) {
+ drawPixel(y0, x0, color);
+ } else {
+ drawPixel(x0, y0, color);
+ }
+ err -= dy;
+ if (err < 0) {
+ y0 += ystep;
+ err += dx;
+ }
+ }
+}
+
+// Draw a rectangle
+void ST7735::drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color) {
+ drawFastHLine(x, y, w, color);
+ drawFastHLine(x, y+h-1, w, color);
+ drawFastVLine(x, y, h, color);
+ drawFastVLine(x+w-1, y, h, color);
+}
+
+// Draw a circle outline
+void ST7735::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color) {
+ int16_t f = 1 - r;
+ int16_t ddF_x = 1;
+ int16_t ddF_y = -2 * r;
+ int16_t x = 0;
+ int16_t y = r;
+
+ drawPixel(x0 , y0+r, color);
+ drawPixel(x0 , y0-r, color);
+ drawPixel(x0+r, y0 , color);
+ drawPixel(x0-r, y0 , color);
+
+ while (x<y) {
+ if (f >= 0) {
+ y--;
+ ddF_y += 2;
+ f += ddF_y;
+ }
+ x++;
+ ddF_x += 2;
+ f += ddF_x;
+
+ drawPixel(x0 + x, y0 + y, color);
+ drawPixel(x0 - x, y0 + y, color);
+ drawPixel(x0 + x, y0 - y, color);
+ drawPixel(x0 - x, y0 - y, color);
+ drawPixel(x0 + y, y0 + x, color);
+ drawPixel(x0 - y, y0 + x, color);
+ drawPixel(x0 + y, y0 - x, color);
+ drawPixel(x0 - y, y0 - x, color);
+ }
+}
+
+void ST7735::drawCircleHelper( int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color) {
+ int16_t f = 1 - r;
+ int16_t ddF_x = 1;
+ int16_t ddF_y = -2 * r;
+ int16_t x = 0;
+ int16_t y = r;
+
+ while (x<y) {
+ if (f >= 0) {
+ y--;
+ ddF_y += 2;
+ f += ddF_y;
+ }
+ x++;
+ ddF_x += 2;
+ f += ddF_x;
+ if (cornername & 0x4) {
+ drawPixel(x0 + x, y0 + y, color);
+ drawPixel(x0 + y, y0 + x, color);
+ }
+ if (cornername & 0x2) {
+ drawPixel(x0 + x, y0 - y, color);
+ drawPixel(x0 + y, y0 - x, color);
+ }
+ if (cornername & 0x8) {
+ drawPixel(x0 - y, y0 + x, color);
+ drawPixel(x0 - x, y0 + y, color);
+ }
+ if (cornername & 0x1) {
+ drawPixel(x0 - y, y0 - x, color);
+ drawPixel(x0 - x, y0 - y, color);
+ }
+ }
+}
+
+void ST7735::fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color) {
+ drawFastVLine(x0, y0-r, 2*r+1, color);
+ fillCircleHelper(x0, y0, r, 3, 0, color);
+}
+
+// Used to do circles and roundrects
+void ST7735::fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color) {
+
+ int16_t f = 1 - r;
+ int16_t ddF_x = 1;
+ int16_t ddF_y = -2 * r;
+ int16_t x = 0;
+ int16_t y = r;
+
+ while (x<y) {
+ if (f >= 0) {
+ y--;
+ ddF_y += 2;
+ f += ddF_y;
+ }
+ x++;
+ ddF_x += 2;
+ f += ddF_x;
+
+ if (cornername & 0x1) {
+ drawFastVLine(x0+x, y0-y, 2*y+1+delta, color);
+ drawFastVLine(x0+y, y0-x, 2*x+1+delta, color);
+ }
+ if (cornername & 0x2) {
+ drawFastVLine(x0-x, y0-y, 2*y+1+delta, color);
+ drawFastVLine(x0-y, y0-x, 2*x+1+delta, color);
+ }
+ }
+}
+
+
+// Draw a triangle
+void ST7735::drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color) {
+ drawLine(x0, y0, x1, y1, color);
+ drawLine(x1, y1, x2, y2, color);
+ drawLine(x2, y2, x0, y0, color);
+}
+
+// Fill a triangle
+void ST7735::fillTriangle ( int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color) {
+
+ int16_t a, b, y, last;
+
+ // Sort coordinates by Y order (y2 >= y1 >= y0)
+ if (y0 > y1) {
+ swap(y0, y1); swap(x0, x1);
+ }
+ if (y1 > y2) {
+ swap(y2, y1); swap(x2, x1);
+ }
+ if (y0 > y1) {
+ swap(y0, y1); swap(x0, x1);
+ }
+
+ if(y0 == y2) { // Handle awkward all-on-same-line case as its own thing
+ a = b = x0;
+ if(x1 < a) a = x1;
+ else if(x1 > b) b = x1;
+ if(x2 < a) a = x2;
+ else if(x2 > b) b = x2;
+ drawFastHLine(a, y0, b-a+1, color);
+ return;
+ }
+
+ int16_t
+ dx01 = x1 - x0,
+ dy01 = y1 - y0,
+ dx02 = x2 - x0,
+ dy02 = y2 - y0,
+ dx12 = x2 - x1,
+ dy12 = y2 - y1,
+ sa = 0,
+ sb = 0;
+
+ // For upper part of triangle, find scanline crossings for segments
+ // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1
+ // is included here (and second loop will be skipped, avoiding a /0
+ // error there), otherwise scanline y1 is skipped here and handled
+ // in the second loop...which also avoids a /0 error here if y0=y1
+ // (flat-topped triangle).
+ if(y1 == y2) last = y1; // Include y1 scanline
+ else last = y1-1; // Skip it
+
+ for(y=y0; y<=last; y++) {
+ a = x0 + sa / dy01;
+ b = x0 + sb / dy02;
+ sa += dx01;
+ sb += dx02;
+ /* longhand:
+ a = x0 + (x1 - x0) * (y - y0) / (y1 - y0);
+ b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
+ */
+ if(a > b) swap(a,b);
+ drawFastHLine(a, y, b-a+1, color);
+ }
+
+ // For lower part of triangle, find scanline crossings for segments
+ // 0-2 and 1-2. This loop is skipped if y1=y2.
+ sa = dx12 * (y - y1);
+ sb = dx02 * (y - y0);
+ for(; y<=y2; y++) {
+ a = x1 + sa / dy12;
+ b = x0 + sb / dy02;
+ sa += dx12;
+ sb += dx02;
+ /* longhand:
+ a = x1 + (x2 - x1) * (y - y1) / (y2 - y1);
+ b = x0 + (x2 - x0) * (y - y0) / (y2 - y0);
+ */
+ if(a > b) swap(a,b);
+ drawFastHLine(a, y, b-a+1, color);
+ }
+}
+
+// Draw a rounded rectangle
+void ST7735::drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color) {
+ // smarter version
+ drawFastHLine(x+r , y , w-2*r, color); // Top
+ drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom
+ drawFastVLine(x , y+r , h-2*r, color); // Left
+ drawFastVLine(x+w-1, y+r , h-2*r, color); // Right
+ // draw four corners
+ drawCircleHelper(x+r , y+r , r, 1, color);
+ drawCircleHelper(x+w-r-1, y+r , r, 2, color);
+ drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color);
+ drawCircleHelper(x+r , y+h-r-1, r, 8, color);
+}
+
+// Fill a rounded rectangle
+void ST7735::fillRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color) {
+ // smarter version
+ fillRect(x+r, y, w-2*r, h, color);
+
+ // draw four corners
+ fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color);
+ fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color);
+}
+
+void ST7735::setCursor(int16_t x, int16_t y) {
+ cursor_x = x;
+ cursor_y = y;
+}
+
+void ST7735::setTextSize(uint8_t s) {
+ textsize = (s > 0) ? s : 1;
+}
+
+
+void ST7735::setTextColor(uint16_t c) {
+ // For 'transparent' background, we'll set the bg
+ // to the same as fg instead of using a flag
+ textcolor = textbgcolor = c;
+}
+
+void ST7735::setTextColor(uint16_t c, uint16_t b) {
+ textcolor = c;
+ textbgcolor = b;
+}
+
+void ST7735::setTextWrap(bool w) {
+ wrap = w;
+}
+
+uint8_t ST7735::getRotation(void) {
+ return rotation;
+}
+
+void ST7735::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color) {
+
+ int16_t i, j, byteWidth = (w + 7) / 8;
+
+ for(j=0; j<h; j++) {
+ for(i=0; i<w; i++ ) {
+ if(pgm_read_byte(bitmap + j * byteWidth + i / 8) & (128 >> (i & 7))) {
+ drawPixel(x+i, y+j, color);
+ }
+ }
+ }
+}
+
+
+/***************************************************************************************
+** Function name: drawUnicode
+** Descriptions: draw a unicode
+***************************************************************************************/
+int ST7735::drawUnicode(unsigned int uniCode, int x, int y, int font)
+{
+
+ if (font) uniCode -= 32;
+
+ unsigned int width = 0;
+ unsigned int height = 0;
+ unsigned int flash_address = 0;
+ int8_t gap = 0;
+
+// if (size == 1) {
+// flash_address = pgm_read_word(&chrtbl_f8[uniCode]);
+// width = pgm_read_byte(widtbl_f8+uniCode);
+// height = chr_hgt_f8;
+// gap = 1;
+// }
+#ifdef LOAD_FONT2
+ if (font == 2) {
+ flash_address = pgm_read_word(&chrtbl_f16[uniCode]);
+ width = pgm_read_byte(widtbl_f16+uniCode);
+ height = chr_hgt_f16;
+ gap = 1;
+ }
+#endif
+// if (font == 3) {
+// flash_address = pgm_read_word(&chrtbl_f24[uniCode]);
+// width = pgm_read_byte(widtbl_f24+uniCode);
+// height = chr_hgt_f24;
+// gap = 0;
+// }
+#ifdef LOAD_FONT4
+ if (font == 4) {
+ flash_address = pgm_read_word(&chrtbl_f32[uniCode]);
+ width = pgm_read_byte(widtbl_f32+uniCode);
+ height = chr_hgt_f32;
+ gap = -3;
+ }
+#endif
+// if (font == 5) {
+// flash_address = pgm_read_word(&chrtbl_f48[uniCode]);
+// width = pgm_read_byte(widtbl_f48+uniCode);
+// height = chr_hgt_f48;
+// gap = -3;
+// }
+#ifdef LOAD_FONT6
+ if (font == 6) {
+ flash_address = pgm_read_word(&chrtbl_f64[uniCode]);
+ width = pgm_read_byte(widtbl_f64+uniCode);
+ height = chr_hgt_f64;
+ gap = -3;
+ }
+#endif
+#ifdef LOAD_FONT7
+ if (font == 7) {
+ flash_address = pgm_read_word(&chrtbl_f7s[uniCode]);
+ width = pgm_read_byte(widtbl_f7s+uniCode);
+ height = chr_hgt_f7s;
+ gap = 2;
+ }
+#endif
+#ifdef LOAD_FONT8
+ if (font == 8) {
+ flash_address = pgm_read_word(&chrtbl_f72[uniCode]);
+ width = pgm_read_byte(widtbl_f72+uniCode);
+ height = chr_hgt_f72;
+ gap = 2;
+ }
+#endif
+
+
+int w = (width+7)/8;
+int pX = 0;
+int pY = y;
+int color = 0;
+char line = 0;
+
+//fillRect(x,pY,width+gap,height,textbgcolor);
+
+for(int i=0; i<height; i++)
+{
+ if (textcolor != textbgcolor) {
+ if (textsize == 1) drawFastHLine(x, pY, width+gap, textbgcolor);
+ else fillRect(x, pY, (width+gap)*textsize, textsize, textbgcolor);
+ }
+ for (int k = 0;k < w; k++)
+ {
+ line = pgm_read_byte(flash_address+w*i+k);
+ if(line) {
+ if (textsize==1){
+ pX = x + k*8;
+ if(line & 0x80) drawPixel(pX, pY, textcolor);
+ if(line & 0x40) drawPixel(pX+1, pY, textcolor);
+ if(line & 0x20) drawPixel(pX+2, pY, textcolor);
+ if(line & 0x10) drawPixel(pX+3, pY, textcolor);
+ if(line & 0x8) drawPixel(pX+4, pY, textcolor);
+ if(line & 0x4) drawPixel(pX+5, pY, textcolor);
+ if(line & 0x2) drawPixel(pX+6, pY, textcolor);
+ if(line & 0x1) drawPixel(pX+7, pY, textcolor);
+ }
+ else {
+ pX = x + k*8*textsize;
+ if(line & 0x80) fillRect(pX, pY, textsize, textsize, textcolor);
+ if(line & 0x40) fillRect(pX+textsize, pY, textsize, textsize, textcolor);
+ if(line & 0x20) fillRect(pX+2*textsize, pY, textsize, textsize, textcolor);
+ if(line & 0x10) fillRect(pX+3*textsize, pY, textsize, textsize, textcolor);
+ if(line & 0x8) fillRect(pX+4*textsize, pY, textsize, textsize, textcolor);
+ if(line & 0x4) fillRect(pX+5*textsize, pY, textsize, textsize, textcolor);
+ if(line & 0x2) fillRect(pX+6*textsize, pY, textsize, textsize, textcolor);
+ if(line & 0x1) fillRect(pX+7*textsize, pY, textsize, textsize, textcolor);
+ }
+ }
+ }
+ pY+=textsize;
+}
+return (width+gap)*textsize; // x +
+}
+
+/***************************************************************************************
+** Function name: drawNumber unsigned with size
+** Descriptions: drawNumber
+***************************************************************************************/
+int ST7735::drawNumber(long long_num,int poX, int poY, int font)
+{
+ char tmp[10];
+ if (long_num < 0) sprintf(tmp, "%li", long_num);
+ else sprintf(tmp, "%lu", long_num);
+ return drawString(tmp, poX, poY, font);
+}
+
+/***************************************************************************************
+** Function name: drawChar
+** Descriptions: draw char
+***************************************************************************************/
+int ST7735::drawChar(char c, int x, int y, int font)
+{
+ return drawUnicode(c, x, y, font);
+}
+
+/***************************************************************************************
+** Function name: drawString
+** Descriptions: draw string
+***************************************************************************************/
+int ST7735::drawString(char *string, int poX, int poY, int font)
+{
+ int sumX = 0;
+
+ while(*string)
+ {
+ int xPlus = drawChar(*string, poX, poY, font);
+ sumX += xPlus;
+ *string++;
+ poX += xPlus; /* Move cursor right */
+ }
+ return sumX;
+}
+
+/***************************************************************************************
+** Function name: drawCentreString
+** Descriptions: draw string across centre
+***************************************************************************************/
+int ST7735::drawCentreString(char *string, int dX, int poY, int font)
+{
+ int sumX = 0;
+ int len = 0;
+ char *pointer = string;
+ char ascii;
+
+ while(*pointer)
+ {
+ ascii = *pointer;
+ //if (font==0)len += 1+pgm_read_byte(widtbl_log+ascii);
+ //if (font==1)len += 1+pgm_read_byte(widtbl_f8+ascii-32);
+#ifdef LOAD_FONT2
+ if (font==2)len += 1+pgm_read_byte(widtbl_f16+ascii-32);
+#endif
+ //if (font==3)len += 1+pgm_read_byte(widtbl_f48+ascii-32)/2;
+#ifdef LOAD_FONT4
+ if (font==4)len += pgm_read_byte(widtbl_f32+ascii-32)-3;
+#endif
+ //if (font==5) len += pgm_read_byte(widtbl_f48+ascii-32)-3;
+#ifdef LOAD_FONT6
+ if (font==6) len += pgm_read_byte(widtbl_f64+ascii-32)-3;
+#endif
+#ifdef LOAD_FONT7
+ if (font==7) len += pgm_read_byte(widtbl_f7s+ascii-32)+2;
+#endif
+#ifdef LOAD_FONT8
+ if (font==8) len += pgm_read_byte(widtbl_f72+ascii-32)+2;
+#endif
+ *pointer++;
+ }
+ len = len*textsize;
+ int poX = dX - len/2;
+
+ if (poX < 0) poX = 0;
+
+ while(*string)
+ {
+
+ int xPlus = drawChar(*string, poX, poY, font);
+ sumX += xPlus;
+ *string++;
+ poX += xPlus; /* Move cursor right */
+ }
+
+ return sumX;
+}
+
+/***************************************************************************************
+** Function name: drawRightString
+** Descriptions: draw string right justified
+***************************************************************************************/
+int ST7735::drawRightString(char *string, int dX, int poY, int font)
+{
+ int sumX = 0;
+ int len = 0;
+ char *pointer = string;
+ char ascii;
+
+ while(*pointer)
+ {
+ ascii = *pointer;
+ //if (font==0)len += 1+pgm_read_byte(widtbl_log+ascii);
+ //if (font==1)len += 1+pgm_read_byte(widtbl_f8+ascii-32);
+#ifdef LOAD_FONT2
+ if (font==2)len += 1+pgm_read_byte(widtbl_f16+ascii-32);
+#endif
+ //if (font==3)len += 1+pgm_read_byte(widtbl_f48+ascii-32)/2;
+#ifdef LOAD_FONT4
+ if (font==4)len += pgm_read_byte(widtbl_f32+ascii-32)-3;
+#endif
+ //if (font==5) len += pgm_read_byte(widtbl_f48+ascii-32)-3;
+#ifdef LOAD_FONT6
+ if (font==6) len += pgm_read_byte(widtbl_f64+ascii-32)-3;
+#endif
+#ifdef LOAD_FONT7
+ if (font==7) len += pgm_read_byte(widtbl_f7s+ascii-32)+2;
+#endif
+#ifdef LOAD_FONT8
+ if (font==8) len += pgm_read_byte(widtbl_f72+ascii-32)+2;
+#endif
+ *pointer++;
+ }
+
+ len = len*textsize;
+ int poX = dX - len;
+
+ if (poX < 0) poX = 0;
+
+ while(*string)
+ {
+
+ int xPlus = drawChar(*string, poX, poY, font);
+ sumX += xPlus;
+ *string++;
+ poX += xPlus; /* Move cursor right */
+ }
+
+ return sumX;
+}
+
+/***************************************************************************************
+** Function name: drawFloat
+** Descriptions: drawFloat
+***************************************************************************************/
+int ST7735::drawFloat(float floatNumber, int decimal, int poX, int poY, int font)
+{
+ unsigned long temp=0;
+ float decy=0.0;
+ float rounding = 0.5;
+
+ float eep = 0.000001;
+
+ int sumX = 0;
+ int xPlus = 0;
+
+ if(floatNumber-0.0 < eep) // floatNumber < 0
+ {
+ xPlus = drawChar('-',poX, poY, font);
+ floatNumber = -floatNumber;
+
+ poX += xPlus;
+ sumX += xPlus;
+ }
+
+ for (unsigned char i=0; i<decimal; ++i)
+ {
+ rounding /= 10.0;
+ }
+
+ floatNumber += rounding;
+
+ temp = (long)floatNumber;
+
+
+ xPlus = drawNumber(temp,poX, poY, font);
+
+ poX += xPlus;
+ sumX += xPlus;
+
+ if(decimal>0)
+ {
+ xPlus = drawChar('.',poX, poY, font);
+ poX += xPlus; /* Move cursor right */
+ sumX += xPlus;
+ }
+ else
+ {
+ return sumX;
+ }
+
+ decy = floatNumber - temp;
+ for(unsigned char i=0; i<decimal; i++)
+ {
+ decy *= 10; /* for the next decimal */
+ temp = decy; /* get the decimal */
+ xPlus = drawNumber(temp,poX, poY, font);
+
+ poX += xPlus; /* Move cursor right */
+ sumX += xPlus;
+ decy -= temp;
+ }
+ return sumX;
+}
+