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
Revision 0:cccc5726bdf3, committed 2011-07-12
- Comitter:
- dreschpe
- Date:
- Tue Jul 12 08:27:34 2011 +0000
- Child:
- 1:aa3356b16080
- Commit message:
- 0.8
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/GraphicsDisplay.cpp Tue Jul 12 08:27:34 2011 +0000
@@ -0,0 +1,176 @@
+/* mbed GraphicsDisplay Display Library Base Class
+ * Copyright (c) 2007-2009 sford
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+#include "GraphicsDisplay.h"
+
+const unsigned char FONT8x8[97][8] = {
+0x08,0x08,0x08,0x00,0x00,0x00,0x00,0x00, // columns, rows, num_bytes_per_char
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, // space 0x20
+0x30,0x78,0x78,0x30,0x30,0x00,0x30,0x00, // !
+0x6C,0x6C,0x6C,0x00,0x00,0x00,0x00,0x00, // "
+0x6C,0x6C,0xFE,0x6C,0xFE,0x6C,0x6C,0x00, // #
+0x18,0x3E,0x60,0x3C,0x06,0x7C,0x18,0x00, // $
+0x00,0x63,0x66,0x0C,0x18,0x33,0x63,0x00, // %
+0x1C,0x36,0x1C,0x3B,0x6E,0x66,0x3B,0x00, // &
+0x30,0x30,0x60,0x00,0x00,0x00,0x00,0x00, // '
+0x0C,0x18,0x30,0x30,0x30,0x18,0x0C,0x00, // (
+0x30,0x18,0x0C,0x0C,0x0C,0x18,0x30,0x00, // )
+0x00,0x66,0x3C,0xFF,0x3C,0x66,0x00,0x00, // *
+0x00,0x30,0x30,0xFC,0x30,0x30,0x00,0x00, // +
+0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x30, // ,
+0x00,0x00,0x00,0x7E,0x00,0x00,0x00,0x00, // -
+0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00, // .
+0x03,0x06,0x0C,0x18,0x30,0x60,0x40,0x00, // / (forward slash)
+0x3E,0x63,0x63,0x6B,0x63,0x63,0x3E,0x00, // 0 0x30
+0x18,0x38,0x58,0x18,0x18,0x18,0x7E,0x00, // 1
+0x3C,0x66,0x06,0x1C,0x30,0x66,0x7E,0x00, // 2
+0x3C,0x66,0x06,0x1C,0x06,0x66,0x3C,0x00, // 3
+0x0E,0x1E,0x36,0x66,0x7F,0x06,0x0F,0x00, // 4
+0x7E,0x60,0x7C,0x06,0x06,0x66,0x3C,0x00, // 5
+0x1C,0x30,0x60,0x7C,0x66,0x66,0x3C,0x00, // 6
+0x7E,0x66,0x06,0x0C,0x18,0x18,0x18,0x00, // 7
+0x3C,0x66,0x66,0x3C,0x66,0x66,0x3C,0x00, // 8
+0x3C,0x66,0x66,0x3E,0x06,0x0C,0x38,0x00, // 9
+0x00,0x18,0x18,0x00,0x00,0x18,0x18,0x00, // :
+0x00,0x18,0x18,0x00,0x00,0x18,0x18,0x30, // ;
+0x0C,0x18,0x30,0x60,0x30,0x18,0x0C,0x00, // <
+0x00,0x00,0x7E,0x00,0x00,0x7E,0x00,0x00, // =
+0x30,0x18,0x0C,0x06,0x0C,0x18,0x30,0x00, // >
+0x3C,0x66,0x06,0x0C,0x18,0x00,0x18,0x00, // ?
+0x3E,0x63,0x6F,0x69,0x6F,0x60,0x3E,0x00, // @ 0x40
+0x18,0x3C,0x66,0x66,0x7E,0x66,0x66,0x00, // A
+0x7E,0x33,0x33,0x3E,0x33,0x33,0x7E,0x00, // B
+0x1E,0x33,0x60,0x60,0x60,0x33,0x1E,0x00, // C
+0x7C,0x36,0x33,0x33,0x33,0x36,0x7C,0x00, // D
+0x7F,0x31,0x34,0x3C,0x34,0x31,0x7F,0x00, // E
+0x7F,0x31,0x34,0x3C,0x34,0x30,0x78,0x00, // F
+0x1E,0x33,0x60,0x60,0x67,0x33,0x1F,0x00, // G
+0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00, // H
+0x3C,0x18,0x18,0x18,0x18,0x18,0x3C,0x00, // I
+0x0F,0x06,0x06,0x06,0x66,0x66,0x3C,0x00, // J
+0x73,0x33,0x36,0x3C,0x36,0x33,0x73,0x00, // K
+0x78,0x30,0x30,0x30,0x31,0x33,0x7F,0x00, // L
+0x63,0x77,0x7F,0x7F,0x6B,0x63,0x63,0x00, // M
+0x63,0x73,0x7B,0x6F,0x67,0x63,0x63,0x00, // N
+0x3E,0x63,0x63,0x63,0x63,0x63,0x3E,0x00, // O
+0x7E,0x33,0x33,0x3E,0x30,0x30,0x78,0x00, // P 0x50
+0x3C,0x66,0x66,0x66,0x6E,0x3C,0x0E,0x00, // Q
+0x7E,0x33,0x33,0x3E,0x36,0x33,0x73,0x00, // R
+0x3C,0x66,0x30,0x18,0x0C,0x66,0x3C,0x00, // S
+0x7E,0x5A,0x18,0x18,0x18,0x18,0x3C,0x00, // T
+0x66,0x66,0x66,0x66,0x66,0x66,0x7E,0x00, // U
+0x66,0x66,0x66,0x66,0x66,0x3C,0x18,0x00, // V
+0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00, // W
+0x63,0x63,0x36,0x1C,0x1C,0x36,0x63,0x00, // X
+0x66,0x66,0x66,0x3C,0x18,0x18,0x3C,0x00, // Y
+0x7F,0x63,0x46,0x0C,0x19,0x33,0x7F,0x00, // Z
+0x3C,0x30,0x30,0x30,0x30,0x30,0x3C,0x00, // [
+0x60,0x30,0x18,0x0C,0x06,0x03,0x01,0x00, // \ (back slash)
+0x3C,0x0C,0x0C,0x0C,0x0C,0x0C,0x3C,0x00, // ]
+0x08,0x1C,0x36,0x63,0x00,0x00,0x00,0x00, // ^
+0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF, // _
+0x18,0x18,0x0C,0x00,0x00,0x00,0x00,0x00, // ` 0x60
+0x00,0x00,0x3C,0x06,0x3E,0x66,0x3B,0x00, // a
+0x70,0x30,0x3E,0x33,0x33,0x33,0x6E,0x00, // b
+0x00,0x00,0x3C,0x66,0x60,0x66,0x3C,0x00, // c
+0x0E,0x06,0x3E,0x66,0x66,0x66,0x3B,0x00, // d
+0x00,0x00,0x3C,0x66,0x7E,0x60,0x3C,0x00, // e
+0x1C,0x36,0x30,0x78,0x30,0x30,0x78,0x00, // f
+0x00,0x00,0x3B,0x66,0x66,0x3E,0x06,0x7C, // g
+0x70,0x30,0x36,0x3B,0x33,0x33,0x73,0x00, // h
+0x18,0x00,0x38,0x18,0x18,0x18,0x3C,0x00, // i
+0x06,0x00,0x06,0x06,0x06,0x66,0x66,0x3C, // j
+0x70,0x30,0x33,0x36,0x3C,0x36,0x73,0x00, // k
+0x38,0x18,0x18,0x18,0x18,0x18,0x3C,0x00, // l
+0x00,0x00,0x66,0x7F,0x7F,0x6B,0x63,0x00, // m
+0x00,0x00,0x7C,0x66,0x66,0x66,0x66,0x00, // n
+0x00,0x00,0x3C,0x66,0x66,0x66,0x3C,0x00, // o
+0x00,0x00,0x6E,0x33,0x33,0x3E,0x30,0x78, // p
+0x00,0x00,0x3B,0x66,0x66,0x3E,0x06,0x0F, // q
+0x00,0x00,0x6E,0x3B,0x33,0x30,0x78,0x00, // r
+0x00,0x00,0x3E,0x60,0x3C,0x06,0x7C,0x00, // s
+0x08,0x18,0x3E,0x18,0x18,0x1A,0x0C,0x00, // t
+0x00,0x00,0x66,0x66,0x66,0x66,0x3B,0x00, // u
+0x00,0x00,0x66,0x66,0x66,0x3C,0x18,0x00, // v
+0x00,0x00,0x63,0x6B,0x7F,0x7F,0x36,0x00, // w
+0x00,0x00,0x63,0x36,0x1C,0x36,0x63,0x00, // x
+0x00,0x00,0x66,0x66,0x66,0x3E,0x06,0x7C, // y
+0x00,0x00,0x7E,0x4C,0x18,0x32,0x7E,0x00, // z
+0x0E,0x18,0x18,0x70,0x18,0x18,0x0E,0x00, // {
+0x0C,0x0C,0x0C,0x00,0x0C,0x0C,0x0C,0x00, // |
+0x70,0x18,0x18,0x0E,0x18,0x18,0x70,0x00, // }
+0x3B,0x6E,0x00,0x00,0x00,0x00,0x00,0x00, // ~
+0x1C,0x36,0x36,0x1C,0x00,0x00,0x00,0x00}; // DEL
+
+GraphicsDisplay::GraphicsDisplay(const char *name):TextDisplay(name) {
+ foreground(0xFFFF);
+ background(0x0000);
+}
+
+void GraphicsDisplay::character(int column, int row, int value) {
+ blitbit(column * 8, row * 8, 8, 8, (char*)&(FONT8x8[value - 0x1F][0]));
+}
+
+void GraphicsDisplay::window(int x, int y, int w, int h) {
+ // current pixel location
+ _x = x;
+ _y = y;
+ // window settings
+ _x1 = x;
+ _x2 = x + w - 1;
+ _y1 = y;
+ _y2 = y + h - 1;
+}
+
+void GraphicsDisplay::putp(int colour) {
+ // put pixel at current pixel location
+ pixel(_x, _y, colour);
+ // update pixel location based on window settings
+ _x++;
+ if(_x > _x2) {
+ _x = _x1;
+ _y++;
+ if(_y > _y2) {
+ _y = _y1;
+ }
+ }
+}
+
+void GraphicsDisplay::fill(int x, int y, int w, int h, int colour) {
+ window(x, y, w, h);
+ for(int i=0; i<w*h; i++) {
+ putp(colour);
+ }
+}
+
+void GraphicsDisplay::cls() {
+ fill(0, 0, width(), height(), _background);
+}
+
+void GraphicsDisplay::blit(int x, int y, int w, int h, const int *colour) {
+ window(x, y, w, h);
+ for(int i=0; i<w*h; i++) {
+ putp(colour[i]);
+ }
+}
+
+void GraphicsDisplay::blitbit(int x, int y, int w, int h, const char* colour) {
+ window(x, y, w, h);
+ for(int i = 0; i < w*h; i++) {
+ char byte = colour[i >> 3];
+ int offset = i & 0x7;
+ int c = ((byte << offset) & 0x80) ? _foreground : _background;
+ putp(c);
+ }
+}
+
+int GraphicsDisplay::columns() {
+ return width() / 8;
+}
+
+int GraphicsDisplay::rows() {
+ return height() / 8;
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/GraphicsDisplay.h Tue Jul 12 08:27:34 2011 +0000
@@ -0,0 +1,55 @@
+/* mbed GraphicsDisplay Display Library Base Class
+ * Copyright (c) 2007-2009 sford
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * A library for providing a common base class for Graphics displays
+ * To port a new display, derive from this class and implement
+ * the constructor (setup the display), pixel (put a pixel
+ * at a location), width and height functions. Everything else
+ * (locate, printf, putc, cls, window, putp, fill, blit, blitbit)
+ * will come for free. You can also provide a specialised implementation
+ * of window and putp to speed up the results
+ */
+
+#ifndef MBED_GRAPHICSDISPLAY_H
+#define MBED_GRAPHICSDISPLAY_H
+
+#include "TextDisplay.h"
+
+class GraphicsDisplay : public TextDisplay {
+
+public:
+
+ GraphicsDisplay(const char* name);
+
+ virtual void pixel(int x, int y, int colour) = 0;
+ virtual int width() = 0;
+ virtual int height() = 0;
+
+ virtual void window(int x, int y, int w, int h);
+ virtual void putp(int colour);
+
+ virtual void cls();
+ virtual void fill(int x, int y, int w, int h, int colour);
+ virtual void blit(int x, int y, int w, int h, const int *colour);
+ virtual void blitbit(int x, int y, int w, int h, const char* colour);
+
+ virtual void character(int column, int row, int value);
+ virtual int columns();
+ virtual int rows();
+
+protected:
+
+ // pixel location
+ short _x;
+ short _y;
+
+ // window location
+ short _x1;
+ short _x2;
+ short _y1;
+ short _y2;
+
+};
+
+#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_TFT.c Tue Jul 12 08:27:34 2011 +0000
@@ -0,0 +1,883 @@
+/* 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();
+}
\ No newline at end of file
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_TFT.h Tue Jul 12 08:27:34 2011 +0000
@@ -0,0 +1,93 @@
+/* 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.
+ */
+
+#ifndef MBED_SPI_TFT_H
+#define MBED_SPI_TFT_H
+
+#include "mbed.h"
+#include "GraphicsDisplay.h"
+
+#define RGB(r,g,b) (((r&0xF8)<<8)|((g&0xFC)<<3)|((b&0xF8)>>3)) //5 red | 6 green | 5 blue
+
+#define SPI_START (0x70) /* Start byte for SPI transfer */
+#define SPI_RD (0x01) /* WR bit 1 within start */
+#define SPI_WR (0x00) /* WR bit 0 within start */
+#define SPI_DATA (0x02) /* RS bit 1 within start byte */
+#define SPI_INDEX (0x00) /* RS bit 0 within start byte */
+
+
+/* some RGB color definitions */
+#define Black 0x0000 /* 0, 0, 0 */
+#define Navy 0x000F /* 0, 0, 128 */
+#define DarkGreen 0x03E0 /* 0, 128, 0 */
+#define DarkCyan 0x03EF /* 0, 128, 128 */
+#define Maroon 0x7800 /* 128, 0, 0 */
+#define Purple 0x780F /* 128, 0, 128 */
+#define Olive 0x7BE0 /* 128, 128, 0 */
+#define LightGrey 0xC618 /* 192, 192, 192 */
+#define DarkGrey 0x7BEF /* 128, 128, 128 */
+#define Blue 0x001F /* 0, 0, 255 */
+#define Green 0x07E0 /* 0, 255, 0 */
+#define Cyan 0x07FF /* 0, 255, 255 */
+#define Red 0xF800 /* 255, 0, 0 */
+#define Magenta 0xF81F /* 255, 0, 255 */
+#define Yellow 0xFFE0 /* 255, 255, 0 */
+#define White 0xFFFF /* 255, 255, 255 */
+
+
+
+class SPI_TFT : public GraphicsDisplay {
+public:
+ SPI_TFT(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset,const char* name ="TFT");
+ virtual int width();
+ virtual int height();
+ virtual void pixel(int x, int y, int colour);
+ void circle(int x, int y, int r, int colour);
+ void line(int x0, int y0, int x1, int y1, int colour);
+ void rect(int x0, int y0, int x1, int y1, int colour);
+ void fillrect(int x0, int y0, int x1, int y1, int colour);
+ void locate(int column, int row);
+ virtual void cls (void);
+ int columns(void);
+ int rows(void);
+ int _putc(int value);
+ virtual void character(int col, int row, int c);
+ void Bitmap(unsigned int x, unsigned int y, unsigned int w, unsigned int h,unsigned char *bitmap);
+ void set_font(unsigned char* f);
+ void set_orientation(unsigned int o);
+
+ SPI _spi;
+ DigitalOut _cs;
+ DigitalOut _reset;
+ unsigned char* font;
+
+protected:
+ void hline(int x0, int x1, int y, int colour);
+ void vline(int y0, int y1, int x, int colour);
+ void window (unsigned int x, unsigned int y, unsigned int w, unsigned int h);
+ void WindowMax (void);
+ void tft_reset();
+ void wr_dat(int value);
+ void wr_cmd(int value);
+ void wr_dat_start();
+ void wr_dat_stop();
+ void wr_dat_only(unsigned short dat);
+ unsigned short rd_dat(void);
+ void wr_reg (unsigned char reg, unsigned short val);
+ unsigned short rd_reg (unsigned char reg);
+
+ unsigned int orientation;
+ unsigned int char_x;
+
+};
+
+#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TextDisplay.cpp Tue Jul 12 08:27:34 2011 +0000
@@ -0,0 +1,77 @@
+/* mbed TextDisplay Display Library Base Class
+ * Copyright (c) 2007-2009 sford
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+#include "TextDisplay.h"
+
+TextDisplay::TextDisplay(const char *name) : Stream(name){
+ _row = 0;
+ _column = 0;
+ if (name == NULL) {
+ _path = NULL;
+ } else {
+ _path = new char[strlen(name) + 2];
+ sprintf(_path, "/%s", name);
+ }
+}
+
+int TextDisplay::_putc(int value) {
+ if(value == '\n') {
+ _column = 0;
+ _row++;
+ if(_row >= rows()) {
+ _row = 0;
+ }
+ } else {
+ character(_column, _row, value);
+ _column++;
+ if(_column >= columns()) {
+ _column = 0;
+ _row++;
+ if(_row >= rows()) {
+ _row = 0;
+ }
+ }
+ }
+ return value;
+}
+
+// crude cls implementation, should generally be overwritten in derived class
+void TextDisplay::cls() {
+ locate(0, 0);
+ for(int i=0; i<columns()*rows(); i++) {
+ putc(' ');
+ }
+}
+
+void TextDisplay::locate(int column, int row) {
+ _column = column;
+ _row = row;
+}
+
+int TextDisplay::_getc() {
+ return -1;
+}
+
+void TextDisplay::foreground(uint16_t colour) {
+ _foreground = colour;
+}
+
+void TextDisplay::background(uint16_t colour) {
+ _background = colour;
+}
+
+bool TextDisplay::claim (FILE *stream) {
+ if ( _path == NULL) {
+ fprintf(stderr, "claim requires a name to be given in the instantioator of the TextDisplay instance!\r\n");
+ return false;
+ }
+ if (freopen(_path, "w", stream) == NULL) {
+ // Failed, should not happen
+ return false;
+ }
+ // make sure we use line buffering
+ setvbuf(stdout, NULL, _IOLBF, columns());
+ return true;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TextDisplay.h Tue Jul 12 08:27:34 2011 +0000
@@ -0,0 +1,80 @@
+/* mbed TextDisplay Library Base Class
+ * Copyright (c) 2007-2009 sford
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * A common base class for Text displays
+ * To port a new display, derive from this class and implement
+ * the constructor (setup the display), character (put a character
+ * at a location), rows and columns (number of rows/cols) functions.
+ * Everything else (locate, printf, putc, cls) will come for free
+ *
+ * The model is the display will wrap at the right and bottom, so you can
+ * keep writing and will always get valid characters. The location is
+ * maintained internally to the class to make this easy
+ */
+
+#ifndef MBED_TEXTDISPLAY_H
+#define MBED_TEXTDISPLAY_H
+
+#include "mbed.h"
+
+class TextDisplay : public Stream {
+public:
+
+ // functions needing implementation in derived implementation class
+ /** Create a TextDisplay interface
+ *
+ * @param name The name used in the path to access the strean through the filesystem
+ */
+ TextDisplay(const char *name = NULL);
+
+ /** output a character at the given position
+ *
+ * @param column column where charater must be written
+ * @param row where character must be written
+ * @param c the character to be written to the TextDisplay
+ */
+ virtual void character(int column, int row, int c) = 0;
+
+ /** return number if rows on TextDisplay
+ * @result number of rows
+ */
+ virtual int rows() = 0;
+
+ /** return number if columns on TextDisplay
+ * @result number of rows
+ */
+ virtual int columns() = 0;
+
+ // functions that come for free, but can be overwritten
+
+ /** redirect output from a stream (stoud, sterr) to display
+ * @param stream stream that shall be redirected to the TextDisplay
+ */
+ virtual bool claim (FILE *stream);
+
+ /** clear screen
+ */
+ virtual void cls();
+ virtual void locate(int column, int row);
+ virtual void foreground(uint16_t colour);
+ virtual void background(uint16_t colour);
+ // putc (from Stream)
+ // printf (from Stream)
+
+protected:
+
+ virtual int _putc(int value);
+ virtual int _getc();
+
+ // character location
+ uint16_t _column;
+ uint16_t _row;
+
+ // colours
+ uint16_t _foreground;
+ uint16_t _background;
+ char *_path;
+};
+
+#endif