older Version without DMA
Fork of SPI_TFT by
SPI_TFT.c
- Committer:
- dreschpe
- Date:
- 2011-07-12
- Revision:
- 0:cccc5726bdf3
- Child:
- 1:aa3356b16080
File content as of revision 0:cccc5726bdf3:
/* 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" /** Display control class, based on GraphicsDisplay and TextDisplay * * Example: * @code * #include "stdio.h" * #include "mbed.h" * #include "SPI_TFT.h" * #include "string" * #include "Arial12x12.h" * #include "Arial24x23.h" * * * * // the TFT is connected to SPI pin 5-7 * SPI_TFT TFT(p5, p6, p7, p8, p15,"TFT"); // mosi, miso, sclk, cs, reset * * int main() { * TFT.claim(stdout); // send stdout to the TFT display * //TFT.claim(stderr); // send stderr to the TFT display * * TFT.background(Black); // set background to black * TFT.foreground(White); // set chars to white * TFT.cls(); // clear the screen * TFT.set_font((unsigned char*) Arial12x12); // select the font * * TFT.set_orientation(0); * TFT.locate(0,0); * printf(" Hello Mbed 0"); * TFT.set_font((unsigned char*) Arial24x23); // select font 2 * TFT.locate(2,5); * TFT.printf("Bigger Font"); * } * @endcode */ #define BPP 16 /* Bits per pixel /** Create a SPI_TFT object connected to SPI and two pins * * @param mosi,miso,sclk SPI * @param cs pin connected to CS of display * @param reset pin connected to RESET of display * */ 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; } /** Get the width of the screen in pixel * * @param * @returns width of screen in pixel * */ int SPI_TFT::width() { if(orientation == 0 || orientation == 2) return 240; else return 320; } /** Get the height of the screen in pixel * * @param * @returns height of screen in pixel * */ int SPI_TFT::height() { if(orientation == 0 || orientation == 2) return 320; else return 240; } /** Set the orientation of the screen * x,y: 0,0 is always top left * * @param o direction to use the screen 1-4 * */ 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; } } /** Write a command the LCD controller * * @param cmd: command to be written * */ 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; } /** Write data to the LCD controller * * @param dat data written to LCD controller * */ 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; } /** Start data sequence to the LCD controller * */ void SPI_TFT::wr_dat_start(void){ _cs = 0; _spi.write(SPI_START | SPI_WR | SPI_DATA); /* Write : RS = 1, RW = 0 */ } /** Stop of data writing to the LCD controller * */ void SPI_TFT::wr_dat_stop (void){ _cs = 1; } /** write data to the LCD controller * * @param data to be written * * */ 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 } /** Read data from the LCD controller * * @returns data from LCD controller * */ 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); } /** Write a value to the to a LCD register * * @param reg register to be written * @param val data to be written */ void SPI_TFT::wr_reg (unsigned char reg, unsigned short val) { wr_cmd(reg); wr_dat(val); } /** Read a LCD register * * @param reg register to be read * @returns value of the register */ unsigned short SPI_TFT::rd_reg (unsigned char reg) { wr_cmd(reg); return(rd_dat()); } /** Init the HX8347D controller * */ 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 (); } /** Draw a pixel at x,y with color * * @param x horizontal position * @param y vertical position * @param color 16 bit pixel color **/ 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); } /** Set draw window region * * @param x horizontal position * @param y vertical position * @param w window width in pixel * @param h window height in pixels **/ 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); } /** Set draw window region to whole screen * **/ void SPI_TFT::WindowMax (void) { window (0, 0, width(), height()); } /** Fill the screen with _backgroun color * **/ 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(); } /** draw a circle * * @param x0,y0 center * @param r radius * @param color 16 bit color * * */ 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; } /** draw a horizontal line * * @param x0 horizontal start * @param x1 horizontal stop * @param y vertical position * @param color 16 bit 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; } /** draw a vertical line * * @param x horizontal position * @param y0 vertical start * @param y1 vertical stop * @param color 16 bit color * **/ 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; } /** draw a 1 pixel line * * @param x0,y0 start point * @param x1,y1 stop point * @param color 16 bit color * **/ 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; } /** draw a rect * * @param x0,y0 top left corner * @param x1,y1 down right corner * @param color 16 bit color * * **/ 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; } /** draw a filled rect * * @param x0,y0 top left corner * @param x1,y1 down right corner * @param color 16 bit color * **/ 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; } /** setup cursor position * * @param column 0 to max * @param row 0 to max * max depend on font size **/ 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; } /** calculate the max number of char in a line * * @returns max columns * depends on actual font size * */ int SPI_TFT::columns() { return width() / font[1]; } /** calculate the max number of columns * * @returns max column * depends on actual font size * */ int SPI_TFT::rows() { return height() / font[2]; } /** put a char on the screen * * @param value char to print * @returns printed char * */ 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; } /** draw a character on given position out of the active font to the TFT * * @param col column * @param row row * @param c char to print * */ 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; } /** select the font to use * * @param f pointer to font array * * font array can created with GLCD Font Creator from http://www.mikroe.com * you have to add 4 parameter at the beginning of the font array to use: * - the number of byte / char * - the vertial size in pixel * - the horizontal size in pixel * - the number of byte per vertical line * you also have to change the array to char[] * */ void SPI_TFT::set_font(unsigned char* f){ font = f; } /** paint a bitmap on the TFT * * @param x,y : upper left corner * @param w width of bitmap * @param h high of bitmap * @param *bitmap pointer to the bitmap data * * bitmap format: 16 bit R5 G6 B5 * * use Gimp to create / load , save as BMP, option 16 bit R5 G6 B5 * use winhex to load this file and mark data stating at offset 0x46 to end * use edit -> copy block -> C Source to export C array * paste this array into your program * */ 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(); }