Peter Drescher
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.c
- Revision:
- 4:e1e45f8a7664
- Parent:
- 3:5be1edd3a543
- Child:
- 5:2db1b8070d94
--- a/SPI_TFT.c Wed Jul 13 08:53:24 2011 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,689 +0,0 @@
-/* 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::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