Library to control a QVGA TFT connected to SPI. You can use printf to print text The lib can handle different fonts, draw lines, circles, rect and bmp
Diff: SPI_TFT.cpp
- Revision:
- 4:e1e45f8a7664
- Child:
- 5:2db1b8070d94
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SPI_TFT.cpp Thu Jul 14 20:13:07 2011 +0000 @@ -0,0 +1,651 @@ +/* mbed library for 240*320 pixel display TFT based on HX8347D LCD Controller + * Copyright (c) 2011 Peter Drescher - DC2PD + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include "SPI_TFT.h" +#include "mbed.h" + + +#define BPP 16 // Bits per pixel + + + +SPI_TFT::SPI_TFT(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset, const char *name) + : _spi(mosi, miso, sclk), _cs(cs), _reset(reset),GraphicsDisplay(name) { + tft_reset(); + orientation = 0; + char_x = 0; +} + +int SPI_TFT::width() { + if (orientation == 0 || orientation == 2) return 240; + else return 320; +} + + +int SPI_TFT::height() { + if (orientation == 0 || orientation == 2) return 320; + else return 240; +} + + + +void SPI_TFT::set_orientation(unsigned int o) { + orientation = o; + switch (orientation) { + case 0: + wr_reg(0x16, 0x0008); + break; + case 1: + wr_reg(0x16, 0x0068); + break; + case 2: + wr_reg(0x16, 0x00C8); + break; + case 3: + wr_reg(0x16, 0x00A8); + break; + } +} + + + +void SPI_TFT::wr_cmd(int cmd) { + _cs = 0; + _spi.write(SPI_START | SPI_WR | SPI_INDEX); /* Write : RS = 0, RW = 0 */ + _spi.write(cmd); + _cs = 1; +} + + + +void SPI_TFT::wr_dat(int dat) { + _cs = 0; + _spi.write(SPI_START | SPI_WR | SPI_DATA); // Write : RS = 1, RW = 0 + _spi.format(16,3); // switch to 16 bit Mode 3 + _spi.write(dat); // Write D0..D15 + _spi.format(8,3); // 8 bit Mode 3 + _cs = 1; +} + + + +void SPI_TFT::wr_dat_start(void) { + _cs = 0; + _spi.write(SPI_START | SPI_WR | SPI_DATA); /* Write : RS = 1, RW = 0 */ +} + + + +void SPI_TFT::wr_dat_stop (void) { + _cs = 1; +} + + + +void SPI_TFT::wr_dat_only (unsigned short dat) { + + _spi.format(16,3); // switch to 16 bit Mode 3 + _spi.write(dat); // Write D0..D15 + _spi.format(8,3); // 8 bit Mode 3 +} + + + +unsigned short SPI_TFT::rd_dat (void) { + unsigned short val = 0; + + _cs = 0; + _spi.write(SPI_START | SPI_RD | SPI_DATA); /* Read: RS = 1, RW = 1 */ + _spi.write(0); /* Dummy read 1 */ + val = _spi.write(0); /* Read D8..D15 */ + val <<= 8; + val |= _spi.write(0); /* Read D0..D7 */ + _cs = 1; + return (val); +} + + + +void SPI_TFT::wr_reg (unsigned char reg, unsigned short val) { + + wr_cmd(reg); + wr_dat(val); +} + + + +unsigned short SPI_TFT::rd_reg (unsigned char reg) { + + wr_cmd(reg); + return(rd_dat()); +} + + + +void SPI_TFT::tft_reset() { + static unsigned short driverCode; + _spi.format(8,3); // 8 bit spi mode 3 + _spi.frequency(48000000); // 48Mhz SPI clock + _reset = 0; // reset + _cs = 1; + wait_us(50); + _reset = 1; // end reset + wait_ms(5); + + driverCode = rd_reg(0x00); // read controller ID + //printf("Disp_ID = %x",driverCode); + + /* Start Initial Sequence ----------------------------------------------------*/ + wr_reg(0xEA, 0x0000); /* Reset Power Control 1 */ + wr_reg(0xEB, 0x0020); /* Power Control 2 */ + wr_reg(0xEC, 0x000C); /* Power Control 3 */ + wr_reg(0xED, 0x00C4); /* Power Control 4 */ + wr_reg(0xE8, 0x0040); /* Source OPON_N */ + wr_reg(0xE9, 0x0038); /* Source OPON_I */ + wr_reg(0xF1, 0x0001); /* */ + wr_reg(0xF2, 0x0010); /* */ + wr_reg(0x27, 0x00A3); /* Display Control 2 */ + + /* Power On sequence ---------------------------------------------------------*/ + wr_reg(0x1B, 0x001B); /* Power Control 2 */ + wr_reg(0x1A, 0x0001); /* Power Control 1 */ + wr_reg(0x24, 0x002F); /* Vcom Control 2 */ + wr_reg(0x25, 0x0057); /* Vcom Control 3 */ + wr_reg(0x23, 0x008D); /* Vcom Control 1 */ + + /* Gamma settings -----------------------------------------------------------*/ + wr_reg(0x40,0x00); // + wr_reg(0x41,0x00); // + wr_reg(0x42,0x01); // + wr_reg(0x43,0x13); // + wr_reg(0x44,0x10); // + wr_reg(0x45,0x26); // + wr_reg(0x46,0x08); // + wr_reg(0x47,0x51); // + wr_reg(0x48,0x02); // + wr_reg(0x49,0x12); // + wr_reg(0x4A,0x18); // + wr_reg(0x4B,0x19); // + wr_reg(0x4C,0x14); // + wr_reg(0x50,0x19); // + wr_reg(0x51,0x2F); // + wr_reg(0x52,0x2C); // + wr_reg(0x53,0x3E); // + wr_reg(0x54,0x3F); // + wr_reg(0x55,0x3F); // + wr_reg(0x56,0x2E); // + wr_reg(0x57,0x77); // + wr_reg(0x58,0x0B); // + wr_reg(0x59,0x06); // + wr_reg(0x5A,0x07); // + wr_reg(0x5B,0x0D); // + wr_reg(0x5C,0x1D); // + wr_reg(0x5D,0xCC); // + + /* Power + Osc ---------------------------------------------------------------*/ + wr_reg(0x18, 0x0036); /* OSC Control 1 */ + wr_reg(0x19, 0x0001); /* OSC Control 2 */ + wr_reg(0x01, 0x0000); /* Display Mode Control */ + wr_reg(0x1F, 0x0088); /* Power Control 6 */ + wait_ms(5); /* Delay 5 ms */ + wr_reg(0x1F, 0x0080); /* Power Control 6 */ + wait_ms(5); /* Delay 5 ms */ + wr_reg(0x1F, 0x0090); /* Power Control 6 */ + wait_ms(5); /* Delay 5 ms */ + wr_reg(0x1F, 0x00D0); /* Power Control 6 */ + wait_ms(5); /* Delay 5 ms */ + + wr_reg(0x17, 0x0005); /* Colmod 16Bit/Pixel */ + + wr_reg(0x36, 0x0000); /* Panel Characteristic */ + wr_reg(0x28, 0x0038); /* Display Control 3 */ + wait_ms(40); + wr_reg(0x28, 0x003C); /* Display Control 3 */ + switch (orientation) { + case 0: + wr_reg(0x16, 0x0008); + break; + case 1: + wr_reg(0x16, 0x0068); + break; + case 2: + wr_reg(0x16, 0x00C8); + break; + case 3: + wr_reg(0x16, 0x00A8); + break; + } + + WindowMax (); +} + + + + +void SPI_TFT::pixel(int x, int y, int color) { + wr_reg(0x03, (x >> 0)); + wr_reg(0x02, (x >> 8)); + wr_reg(0x07, (y >> 0)); + wr_reg(0x06, (y >> 8)); + wr_cmd(0x22); + wr_dat(color); +} + + + + +void SPI_TFT::window (unsigned int x, unsigned int y, unsigned int w, unsigned int h) { + wr_reg(0x03, (x >> 0)); + wr_reg(0x02, (x >> 8)); + wr_reg(0x05, (x+w-1 >> 0)); + wr_reg(0x04, (x+w-1 >> 8)); + wr_reg(0x07, ( y >> 0)); + wr_reg(0x06, ( y >> 8)); + wr_reg(0x09, ( y+h-1 >> 0)); + wr_reg(0x08, ( y+h-1 >> 8)); + //wr_cmd(0x22); +} + + +void SPI_TFT::WindowMax (void) { + window (0, 0, width(), height()); +} + + +void SPI_TFT::cls (void) { + unsigned int i; + WindowMax(); + wr_cmd(0x22); + wr_dat_start(); + _spi.format(16,3); // 16 bit Mode 3 + for (i = 0; i < ( width() * height()); i++) + _spi.write(_background); + _spi.format(8,3); // 8 bit Mode 3 + wr_dat_stop(); +} + + +void SPI_TFT::circle(int x0, int y0, int r, int color) { + + int draw_x0, draw_y0; + int draw_x1, draw_y1; + int draw_x2, draw_y2; + int draw_x3, draw_y3; + int draw_x4, draw_y4; + int draw_x5, draw_y5; + int draw_x6, draw_y6; + int draw_x7, draw_y7; + int xx, yy; + int di; + WindowMax(); + if (r == 0) { /* no radius */ + return; + } + + draw_x0 = draw_x1 = x0; + draw_y0 = draw_y1 = y0 + r; + if (draw_y0 < height()) { + pixel(draw_x0, draw_y0, color); /* 90 degree */ + } + + draw_x2 = draw_x3 = x0; + draw_y2 = draw_y3 = y0 - r; + if (draw_y2 >= 0) { + pixel(draw_x2, draw_y2, color); /* 270 degree */ + } + + draw_x4 = draw_x6 = x0 + r; + draw_y4 = draw_y6 = y0; + if (draw_x4 < width()) { + pixel(draw_x4, draw_y4, color); /* 0 degree */ + } + + draw_x5 = draw_x7 = x0 - r; + draw_y5 = draw_y7 = y0; + if (draw_x5>=0) { + pixel(draw_x5, draw_y5, color); /* 180 degree */ + } + + if (r == 1) { + return; + } + + di = 3 - 2*r; + xx = 0; + yy = r; + while (xx < yy) { + + if (di < 0) { + di += 4*xx + 6; + } else { + di += 4*(xx - yy) + 10; + yy--; + draw_y0--; + draw_y1--; + draw_y2++; + draw_y3++; + draw_x4--; + draw_x5++; + draw_x6--; + draw_x7++; + } + xx++; + draw_x0++; + draw_x1--; + draw_x2++; + draw_x3--; + draw_y4++; + draw_y5++; + draw_y6--; + draw_y7--; + + if ( (draw_x0 <= width()) && (draw_y0>=0) ) { + pixel(draw_x0, draw_y0, color); + } + + if ( (draw_x1 >= 0) && (draw_y1 >= 0) ) { + pixel(draw_x1, draw_y1, color); + } + + if ( (draw_x2 <= width()) && (draw_y2 <= height()) ) { + pixel(draw_x2, draw_y2, color); + } + + if ( (draw_x3 >=0 ) && (draw_y3 <= height()) ) { + pixel(draw_x3, draw_y3, color); + } + + if ( (draw_x4 <= width()) && (draw_y4 >= 0) ) { + pixel(draw_x4, draw_y4, color); + } + + if ( (draw_x5 >= 0) && (draw_y5 >= 0) ) { + pixel(draw_x5, draw_y5, color); + } + if ( (draw_x6 <=width()) && (draw_y6 <= height()) ) { + pixel(draw_x6, draw_y6, color); + } + if ( (draw_x7 >= 0) && (draw_y7 <= height()) ) { + pixel(draw_x7, draw_y7, color); + } + } + return; +} + +void SPI_TFT::fillcircle(int x, int y, int r, int color){ + int i; + for (i = 0;i <= r; i++) + circle(x,y,i,color); +} + + + +void SPI_TFT::hline(int x0, int x1, int y, int color) { + int w; + w = x1 - x0 + 1; + window(x0,y,w,1); + wr_cmd(0x22); + wr_dat_start(); + _spi.format(16,3); // pixel are send in 16 bit mode to speed up + for (int x=0; x<w; x++) { + _spi.write(color); + } + _spi.format(8,3); + wr_dat_stop(); + return; +} + + + +void SPI_TFT::vline(int x, int y0, int y1, int color) { + int h; + h = y1 - y0 + 1; + window(x,y0,1,h); + wr_cmd(0x22); + wr_dat_start(); + _spi.format(16,3); // pixel are send in 16 bit mode to speed up + for (int y=0; y<h; y++) { + _spi.write(color); + } + _spi.format(8,3); + wr_dat_stop(); + return; +} + + + +void SPI_TFT::line(int x0, int y0, int x1, int y1, int color) { + WindowMax(); + int dx = 0, dy = 0; + int dx_sym = 0, dy_sym = 0; + int dx_x2 = 0, dy_x2 = 0; + int di = 0; + + dx = x1-x0; + dy = y1-y0; + + if (dx == 0) { /* vertical line */ + if (y1 > y0) vline(x0,y0,y1,color); + else vline(x0,y1,y0,color); + return; + } + + if (dx > 0) { + dx_sym = 1; + } else { + dx_sym = -1; + } + if (dy == 0) { /* horizontal line */ + if (x1 > x0) hline(x0,x1,y0,color); + else hline(x1,x0,y0,color); + return; + } + + if (dy > 0) { + dy_sym = 1; + } else { + dy_sym = -1; + } + + dx = dx_sym*dx; + dy = dy_sym*dy; + + dx_x2 = dx*2; + dy_x2 = dy*2; + + if (dx >= dy) { + di = dy_x2 - dx; + while (x0 != x1) { + + pixel(x0, y0, color); + x0 += dx_sym; + if (di<0) { + di += dy_x2; + } else { + di += dy_x2 - dx_x2; + y0 += dy_sym; + } + } + pixel(x0, y0, color); + } else { + di = dx_x2 - dy; + while (y0 != y1) { + pixel(x0, y0, color); + y0 += dy_sym; + if (di < 0) { + di += dx_x2; + } else { + di += dx_x2 - dy_x2; + x0 += dx_sym; + } + } + pixel(x0, y0, color); + } + return; +} + + + + +void SPI_TFT::rect(int x0, int y0, int x1, int y1, int color) { + + if (x1 > x0) hline(x0,x1,y0,color); + else hline(x1,x0,y0,color); + + if (y1 > y0) vline(x0,y0,y1,color); + else vline(x0,y1,y0,color); + + if (x1 > x0) hline(x0,x1,y1,color); + else hline(x1,x0,y1,color); + + if (y1 > y0) vline(x1,y0,y1,color); + else vline(x1,y1,y0,color); + + return; +} + + + +void SPI_TFT::fillrect(int x0, int y0, int x1, int y1, int color) { + + int h = y1 - y0 + 1; + int w = x1 - x0 + 1; + int pixel = h * w; + window(x0,y0,w,h); + wr_cmd(0x22); + wr_dat_start(); + _spi.format(16,3); // pixel are send in 16 bit mode to speed up + for (int p=0; p<pixel; p++) { + _spi.write(color); + } + _spi.format(8,3); + wr_dat_stop(); + return; +} + + + +void SPI_TFT::locate(int column, int row) { + _column = column; + char_x = font[1] * column; // get the horz. size of the actual font + _row = row; +} + + + +int SPI_TFT::columns() { + return width() / font[1]; +} + + + +int SPI_TFT::rows() { + return height() / font[2]; +} + + + +int SPI_TFT::_putc(int value) { + if (value == '\n') { + _column = 0; + char_x = 0; + _row++; + if (_row >= rows()) { + _row = 0; + } + } else { + character(_column, _row, value); + _column++; + } + return value; +} + + + + +void SPI_TFT::character(int col, int row, int c) { + unsigned int hor,vert,offset,bpl,j,i,b; + unsigned char* zeichen; + unsigned char z,w; + + if ((c < 31) || (c > 127)) return; // test char range + + // read font parameter from start of array + offset = font[0]; // bytes / char + hor = font[1]; // get hor size of font + vert = font[2]; // get vert size of font + bpl = font[3]; // bytes per line + + if (char_x + hor > width()) { + char_x = 0; + _column = 0; + _row ++; + row++; + if (_row >= rows()) { + _row = 0; + row=0; + } + } + + window(char_x, row * vert,hor,vert); // char box + wr_cmd(0x22); + wr_dat_start(); + zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap + w = zeichen[0]; // width of actual char + _spi.format(16,3); // pixel are 16 bit + + for (j=0; j<vert; j++) { // vert line + for (i=0; i<hor; i++) { // horz line + z = zeichen[bpl * i + ((j & 0xF8) >> 3)+1]; + b = 1 << (j & 0x07); + if (( z & b ) == 0x00) { + _spi.write(_background); + } else { + _spi.write(_foreground); + } + } + } + _spi.format(8,3); // 8 bit + wr_dat_stop(); + if ((w + 2) < hor) { // x offset to next char + char_x += w + 2; + } else char_x += hor; +} + + + + + +void SPI_TFT::set_font(unsigned char* f) { + font = f; +} + + + +void SPI_TFT::Bitmap(unsigned int x, unsigned int y, unsigned int w, unsigned int h,unsigned char *bitmap) { + unsigned int i,j; + unsigned short *bitmap_ptr = (unsigned short *)bitmap; + window(x, y, w, h); + wr_cmd(0x22); + wr_dat_start(); + _spi.format(16,3); + bitmap_ptr += ((h - 1)*w); + for (j = 0; j < h; j++) { //Lines + for (i = 0; i < w; i++) { // copy pixel data to TFT + _spi.write(*bitmap_ptr); // one line + bitmap_ptr++; + } + bitmap_ptr -= 2*w; + } + _spi.format(8,3); + wr_dat_stop(); +} \ No newline at end of file