Diff: TFT_4DGL_main.cpp

Revision:

0:9b22f4157ab5

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TFT_4DGL_main.cpp	Wed Jan 05 19:58:26 2011 +0000
@@ -0,0 +1,394 @@
+//
+// TFT_4DGL is a class to drive 4D Systems TFT touch screens
+//
+// Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr>
+//
+// TFT_4DGL is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// TFT_4DGL is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with TFT_4DGL.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "mbed.h"
+#include "TFT_4DGL.h"
+
+Serial pc(USBTX,USBRX);
+//DigitalOut led1(LED1), led2(LED2);
+
+//******************************************************************************************************
+TFT_4DGL :: TFT_4DGL(PinName tx, PinName rx, PinName rst) : _cmd(tx, rx), _rst(rst) { // Constructor
+
+#if DEBUGMODE
+    pc.baud(115200);
+
+    pc.printf("\n\n\n");
+    pc.printf("********************\n\r");
+    pc.printf("TFT_4DGL CONSTRUCTOR\n\r");
+    pc.printf("********************\n\r");
+#endif
+
+    _rst = 1;    // put RESET pin to high to start TFT screen
+
+    reset();
+    autobaud();         // send autobaud command
+    baudrate(256000);   // set the initial baudrate to 256kbps - fastest supported by uLCD-32PT
+    cls();              // clear screen
+
+    current_col         = 0;            // initial cursor col
+    current_row         = 0;            // initial cursor row
+    current_color       = WHITE;        // initial text color
+    current_orientation = IS_PORTRAIT;  // initial screen orientation
+
+    set_font(FONT_5X7);                 // initial font
+    text_mode(TRANSPARENT);             // initial text mode
+    display_control(0x06,0x00);         // initial Image control new format
+}
+
+//******************************************************************************************************
+void TFT_4DGL :: writeBYTE(char c) { // send a BYTE command to screen
+
+    _cmd.putc(c);
+
+#if DEBUGMODE
+    pc.printf("   Char sent : 0x%02X  ",c);
+    pc.putc(c);
+    pc.printf(" \n\r");
+#endif
+
+}
+
+//******************************************************************************************************
+void TFT_4DGL :: freeBUFFER(void) {       // Clear serial buffer before writing command
+
+    while (_cmd.readable()) _cmd.getc();  // clear buffer garbage
+}
+
+//******************************************************************************************************
+int TFT_4DGL :: writeCOMMAND(char *command, int number) { // send several BYTES making a command and return an answer
+
+#if DEBUGMODE
+    pc.printf("\n\r");
+    pc.printf("New COMMAND : 0x%02X\n\r", command[0]);
+#endif
+    int i, resp = 0;
+    freeBUFFER();
+
+    for (i = 0; i < number; i++) writeBYTE(command[i]); // send command to serial port
+
+    while (!_cmd.readable()) wait_ms(TEMPO);            // wait for screen answer    
+    if (_cmd.readable()) resp = _cmd.getc();            // read response if any
+    switch (resp) {
+        case ACK :                                      // if OK return   1
+            resp =  1;
+            break;
+        case NAK :                                      // if NOK return -1
+            resp = -1;  
+            break;
+        default :
+            resp =  0;                                  // else return   0
+            break;
+    }
+#if DEBUGMODE
+    pc.printf("   Answer received : %d\n\r",resp);
+#endif
+
+    return resp;
+}
+
+//**************************************************************************
+void TFT_4DGL :: reset() {  // Reset Screen
+
+    _rst = 0;               // put RESET pin to low
+    wait_ms(TEMPO);         // wait a few milliseconds for command reception
+    _rst = 1;               // put RESET back to high
+    wait(3);                // wait 3s for screen to restart
+
+    freeBUFFER();           // clean buffer from possible garbage
+}
+
+//**************************************************************************
+void TFT_4DGL :: autobaud() { // send AutoBaud command (9600)
+    char command[1] = "";
+    command[0] = AUTOBAUD;
+    writeCOMMAND(command, 1);
+}
+
+//**************************************************************************
+void TFT_4DGL :: cls() {  // clear screen
+    char command[1] = "";
+    command[0] = CLS;
+    writeCOMMAND(command, 1);
+}
+
+//**************************************************************************
+void TFT_4DGL :: version() {  // get API version
+    char command[2] = "";
+    command[0] = VERSION;
+    command[1] = OFF;
+    readVERSION(command, 2);
+}
+
+//**************************************************************************
+void TFT_4DGL :: baudrate(long speed) {  // set screen baud rate
+    char command[2]= "";
+    command[0] = BAUDRATE;
+    switch (speed) {
+        case  110 :
+            command[1] = BAUD_110;
+            break;
+        case  300 :
+            command[1] = BAUD_300;
+            break;
+        case  600 :
+            command[1] = BAUD_600;
+            break;
+        case 1200 :
+            command[1] = BAUD_1200;
+            break;
+        case 2400 :
+            command[1] = BAUD_2400;
+            break;
+        case 4800 :
+            command[1] = BAUD_4800;
+            break;
+        case 9600 :
+            command[1] = BAUD_9600;
+            break;
+        case 14400 :
+            command[1] = BAUD_14400;
+            break;
+        case 19200 :
+            command[1] = BAUD_19200;
+            break;
+        case 31250 :
+            command[1] = BAUD_31250;
+            break;
+        case 38400 :
+            command[1] = BAUD_38400;
+            break;
+        case 56000 :
+            command[1] = BAUD_56000;
+            break;
+        case 57600 :
+            command[1] = BAUD_57600;
+            break;
+        case 115200 :
+            command[1] = BAUD_115200;
+            break;
+        case 128000 :
+            command[1] = BAUD_128000;
+            break;
+        case 256000 :
+            command[1] = BAUD_256000;
+            break;
+        default   :
+            command[1] = BAUD_9600;
+            speed = 9600;
+            break;
+    }
+    
+#if DEBUGMODE
+    pc.printf("\n\r");
+    pc.printf("New COMMAND : 0x%02X\n\r", command[0]);
+#endif
+
+    int i, resp = 0;
+    freeBUFFER();
+    
+    if(speed==256000)
+        speed=281000;       //If baud rate is 256K comm at 281k - as instructed by 4DGL
+        
+    for (i = 0; i <2; i++) writeBYTE(command[i]);      // send command to serial port
+    _cmd.baud(speed);                                  // set mbed to same speed
+
+    while (!_cmd.readable()) wait_ms(TEMPO);           // wait for screen answer
+
+    if (_cmd.readable()) resp = _cmd.getc();           // read response if any
+    switch (resp) {
+        case ACK :                                     // if OK return   1
+            resp =  1;
+            break;
+        case NAK :                                     // if NOK return -1
+            resp = -1;
+            break;
+        default :
+            resp =  0;                                 // else return   0
+            break;
+    }
+#if DEBUGMODE
+    pc.printf("   Baudrate reply received : %d\n\r",resp);
+#endif
+}
+
+//******************************************************************************************************
+int TFT_4DGL :: readVERSION(char *command, int number) { // read screen info and populate data
+
+    int i, temp = 0, resp = 0;
+    char response[5] = "";
+
+    freeBUFFER();
+
+    for (i = 0; i < number; i++) writeBYTE(command[i]);    // send all chars to serial port
+
+    while (!_cmd.readable()) wait_ms(TEMPO);               // wait for screen answer
+
+    while (_cmd.readable()) {
+        temp = _cmd.getc();
+        response[resp++] = (char)temp;
+    }
+    switch (resp) {
+        case 5 :                                           // if OK populate data and return 1
+            type      = response[0];
+            revision  = response[1];
+            firmware  = response[2];
+            reserved1 = response[3];
+            reserved2 = response[4];
+            resp      = 1;
+            break;
+        default :
+            resp =  0;                                     // else return 0
+            break;
+    }
+    return resp;
+}
+
+//****************************************************************************************************
+void TFT_4DGL :: background_color(int color) {            // set screen background color
+    char command[3]= "";                                  // input color is in 24bits like 0xRRGGBB
+
+    command[0] = BCKGDCOLOR;
+
+    int red5   = (color >> (16 + 3)) & 0x1F;              // get red on 5 bits
+    int green6 = (color >> (8 + 2))  & 0x3F;              // get green on 6 bits
+    int blue5  = (color >> (0 + 3))  & 0x1F;              // get blue on 5 bits
+
+    command[1] = ((red5 << 3)   + (green6 >> 3)) & 0xFF;  // first part of 16 bits color
+    command[2] = ((green6 << 5) + (blue5 >>  0)) & 0xFF;  // second part of 16 bits color
+
+    writeCOMMAND(command, 3);
+}
+
+//****************************************************************************************************
+void TFT_4DGL :: display_control(char mode, char value) {   // set screen mode to value
+    char command[3]= "";
+
+    command[0] = DISPCONTROL;
+    command[1] = mode;
+    command[2] = value;
+
+    if (mode ==  ORIENTATION) {
+        switch (value) {
+            case LANDSCAPE :
+                current_orientation = IS_LANDSCAPE;
+                break;
+            case LANDSCAPE_R :
+                current_orientation = IS_LANDSCAPE;
+                break;
+            case PORTRAIT :
+                current_orientation = IS_PORTRAIT;
+                break;
+            case PORTRAIT_R :
+                current_orientation = IS_PORTRAIT;
+                break;
+        }
+        set_font(current_font);
+    }
+    writeCOMMAND(command, 3);
+
+}
+
+//****************************************************************************************************
+void TFT_4DGL :: set_volume(char value) {   // set sound volume to value
+    char command[2]= "";
+
+    command[0] = SETVOLUME;
+    command[1] = value;
+
+    writeCOMMAND(command, 2);
+}
+
+
+//******************************************************************************************************
+void TFT_4DGL :: getTOUCH(char *command, int number, int *x, int *y) { // read screen info and populate data
+
+#if DEBUGMODE
+    pc.printf("\n\r");
+    pc.printf("New COMMAND : 0x%02X\n\r", command[0]);
+#endif
+    int i, temp = 0, resp = 0;
+    char response[5] = "";
+
+    freeBUFFER();
+
+    for (i = 0; i < number; i++) writeBYTE(command[i]);    // send all chars to serial port
+
+    while (!_cmd.readable()) wait_ms(TEMPO);               // wait for screen answer
+
+    while (_cmd.readable()) {
+        temp = _cmd.getc();
+        response[resp++] = (char)temp;
+    }
+
+#if DEBUGMODE
+    pc.printf("   Answer received %d : 0x%02X 0x%02X 0x%02X 0x%02X\n\r", resp, response[0], response[1], response[2], response[3]);
+#endif
+
+    switch (resp) {
+        case 4 :                                                              // if OK populate data
+            *x = ((response[0]<<8)+ response[1]) * (response[0] != 0xFF);
+            *y = ((response[2]<<8)+ response[3]) * (response[2] != 0xFF);
+            break;
+        default :
+            *x = -1;
+            *y = -1;
+            break;
+    }
+
+#if DEBUGMODE
+    pc.printf("   X,Y : %03d,%03d\n\r", *x, *y);
+#endif
+}
+
+//******************************************************************************************************
+int TFT_4DGL :: getSTATUS(char *command, int number) { // read screen info and populate data
+
+#if DEBUGMODE
+    pc.printf("\n\r");
+    pc.printf("New COMMAND : 0x%02X\n\r", command[0]);
+#endif
+
+    int i, temp = 0, resp = 0;
+    char response[5] = "";
+
+    freeBUFFER();
+
+    for (i = 0; i < number; i++) writeBYTE(command[i]);    // send all chars to serial port
+
+    while (!_cmd.readable()) wait_ms(TEMPO);    // wait for screen answer
+
+    while (_cmd.readable()) {
+        temp = _cmd.getc();
+        response[resp++] = (char)temp;
+    }
+    switch (resp) {
+        case 4 :
+            resp = (int)response[1];            // if OK populate data
+            break;
+        default :
+            resp =  -1;                         // else return   0
+            break;
+    }
+    
+#if DEBUGMODE
+    pc.printf("   Answer received : %d\n\r", resp);
+#endif
+
+    return resp;
+}
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