Diff: uLCD_4DGL_main.cpp

Revision:

0:64079f49da67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uLCD_4DGL_main.cpp	Tue Nov 01 18:29:26 2016 +0000
@@ -0,0 +1,469 @@
+//
+// uLCD_4DGL is a class to drive 4D Systems uLCD 144 G2
+//
+// Copyright (C) <2010> Stephane ROCHON <stephane.rochon at free.fr>
+// Modifed for Goldelox processor <2013> Jim Hamblen
+//
+// uLCD_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.
+//
+// uLCD_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 uLCD_4DGL.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "mbed.h"
+#include "uLCD_4DGL.h"
+
+#define ARRAY_SIZE(X) sizeof(X)/sizeof(X[0])
+
+//Serial pc(USBTX,USBRX);
+
+
+//******************************************************************************************************
+uLCD_4DGL :: uLCD_4DGL(PinName tx, PinName rx, PinName rst) : _cmd(tx, rx),
+    _rst(rst)
+#if DEBUGMODE
+    ,pc(USBTX, USBRX)
+#endif // DEBUGMODE
+{
+    // Constructor
+    _cmd.baud(9600);
+#if DEBUGMODE
+    pc.baud(115200);
+
+    pc.printf("\n\n\n");
+    pc.printf("*********************\n");
+    pc.printf("uLCD_4DGL CONSTRUCTOR\n");
+    pc.printf("*********************\n");
+#endif
+
+    _rst = 1;    // put RESET pin to high to start TFT screen
+    reset();
+    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
+    current_hf = 1;
+    current_wf = 1;
+    set_font(FONT_7X8);                 // initial font
+//   text_mode(OPAQUE);                  // initial texr mode
+}
+
+//******************************************************************************************************
+void uLCD_4DGL :: writeBYTE(char c)   // send a BYTE command to screen
+{
+
+    _cmd.putc(c);
+    wait_us(500);  //mbed is too fast for LCD at high baud rates in some long commands
+
+#if DEBUGMODE
+    pc.printf("   Char sent : 0x%02X\n",c);
+#endif
+
+}
+
+//******************************************************************************************************
+void uLCD_4DGL :: writeBYTEfast(char c)   // send a BYTE command to screen
+{
+
+    _cmd.putc(c);
+    //wait_ms(0.0);  //mbed is too fast for LCD at high baud rates - but not in short commands
+
+#if DEBUGMODE
+    pc.printf("   Char sent : 0x%02X\n",c);
+#endif
+
+}
+//******************************************************************************************************
+void uLCD_4DGL :: freeBUFFER(void)         // Clear serial buffer before writing command
+{
+
+    while (_cmd.readable()) _cmd.getc();  // clear buffer garbage
+}
+
+//******************************************************************************************************
+int uLCD_4DGL :: writeCOMMAND(char *command, int number)   // send several BYTES making a command and return an answer
+{
+
+#if DEBUGMODE
+    pc.printf("\n");
+    pc.printf("New COMMAND : 0x%02X\n", command[0]);
+#endif
+    int i, resp = 0;
+    freeBUFFER();
+    writeBYTE(0xFF);
+    for (i = 0; i < number; i++) {
+        if (i<16)
+            writeBYTEfast(command[i]); // send command to serial port
+        else
+            writeBYTE(command[i]); // send command to serial port but slower
+    }
+    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",resp);
+#endif
+
+    return resp;
+}
+
+//**************************************************************************
+void uLCD_4DGL :: reset()    // Reset Screen
+{
+    wait_ms(5);
+    _rst = 0;               // put RESET pin to low
+    wait_ms(5);         // 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
+}
+//******************************************************************************************************
+int uLCD_4DGL :: writeCOMMANDnull(char *command, int number)   // send several BYTES making a command and return an answer
+{
+
+#if DEBUGMODE
+    pc.printf("\n");
+    pc.printf("New COMMAND : 0x%02X\n", command[0]);
+#endif
+    int i, resp = 0;
+    freeBUFFER();
+    writeBYTE(0x00); //command has a null prefix byte
+    for (i = 0; i < number; i++) {
+        if (i<16) //don't overflow LCD UART buffer
+            writeBYTEfast(command[i]); // send command to serial port
+        else
+            writeBYTE(command[i]); // send command to serial port with delay
+    }
+    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",resp);
+#endif
+
+    return resp;
+}
+
+//**************************************************************************
+void uLCD_4DGL :: cls()    // clear screen
+{
+    char command[1] = "";
+
+    command[0] = CLS;
+    writeCOMMAND(command, 1);
+    current_row=0;
+    current_col=0;
+    current_hf = 1;
+    current_wf = 1;
+    set_font(FONT_7X8);                 // initial font
+}
+
+//**************************************************************************
+int uLCD_4DGL :: version()    // get API version
+{
+
+    char command[2] = "";
+    command[0] = '\x00';
+    command[1] = VERSION;
+    return readVERSION(command, 2);
+}
+
+//**************************************************************************
+void uLCD_4DGL :: baudrate(int speed)    // set screen baud rate
+{
+    char command[3]= "";
+    writeBYTE(0x00);
+    command[0] = BAUDRATE;
+    command[1] = 0;
+    int newbaud = BAUD_9600;
+    switch (speed) {
+        case  110 :
+            newbaud = BAUD_110;
+            break;
+        case  300 :
+            newbaud = BAUD_300;
+            break;
+        case  600 :
+            newbaud = BAUD_600;
+            break;
+        case 1200 :
+            newbaud = BAUD_1200;
+            break;
+        case 2400 :
+            newbaud = BAUD_2400;
+            break;
+        case 4800 :
+            newbaud = BAUD_4800;
+            break;
+        case 9600 :
+            newbaud = BAUD_9600;
+            break;
+        case 14400 :
+            newbaud = BAUD_14400;
+            break;
+        case 19200 :
+            newbaud = BAUD_19200;
+            break;
+        case 31250 :
+            newbaud = BAUD_31250;
+            break;
+        case 38400 :
+            newbaud = BAUD_38400;
+            break;
+        case 56000 :
+            newbaud = BAUD_56000;
+            break;
+        case 57600 :
+            newbaud = BAUD_57600;
+            break;
+        case 115200 :
+            newbaud = BAUD_115200;
+            break;
+        case 128000 :
+            newbaud = BAUD_128000;
+            break;
+        case 256000 :
+            newbaud = BAUD_256000;
+            break;
+        case 300000 :
+            newbaud = BAUD_300000;
+            speed = 272727;
+            break;
+        case 375000 :
+            newbaud = BAUD_375000;
+            speed = 333333;
+            break;
+        case 500000 :
+            newbaud = BAUD_500000;
+            speed = 428571;
+            break;
+        case 600000 :
+            newbaud = BAUD_600000;
+            break;
+        case 750000 : //rates over 600000 are not documented, but seem to work
+            newbaud = BAUD_750000;
+            break;
+        case 1000000 :  
+            newbaud = BAUD_1000000;
+            break;
+        case 1500000 :
+            newbaud = BAUD_1500000;
+            break;
+        case 3000000 :
+            newbaud = BAUD_3000000;
+            break;
+        default   :
+            newbaud = BAUD_9600;
+            speed = 9600;
+            break;
+    }
+
+    int i, resp = 0;
+
+    freeBUFFER();
+    command[1] = char(newbaud >>8);
+    command[2] = char(newbaud % 256);
+    wait_ms(1);
+    for (i = 0; i <3; i++) writeBYTEfast(command[i]);      // send command to serial port
+    for (i = 0; i<10; i++) wait_ms(1); 
+    //dont change baud until all characters get sent out
+    _cmd.baud(speed);                                  // set mbed to same speed
+    i=0;
+    while ((!_cmd.readable()) && (i<25000)) {
+        wait_ms(TEMPO);           // wait for screen answer - comes 100ms after change
+        i++; //timeout if ack character missed by baud change
+    }
+    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;
+    }
+}
+
+//******************************************************************************************************
+int uLCD_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() && resp < ARRAY_SIZE(response)) {
+        temp = _cmd.getc();
+        response[resp++] = (char)temp;
+    }
+    switch (resp) {
+        case 2 :                                           // if OK populate data and return 1
+            revision  = response[0]<<8 + response[1];
+            resp      = 1;
+            break;
+        default :
+            resp =  0;                                     // else return 0
+            break;
+    }
+    return resp;
+}
+
+//****************************************************************************************************
+void uLCD_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 uLCD_4DGL :: textbackground_color(int color)              // set screen background color
+{
+    char command[3]= "";                                  // input color is in 24bits like 0xRRGGBB
+
+    command[0] = TXTBCKGDCOLOR;
+
+    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 uLCD_4DGL :: display_control(char mode)     // set screen mode to value
+{
+    char command[3]= "";
+
+    command[0] = DISPCONTROL;
+    command[1] = 0;
+    command[2] = mode;
+
+    if (mode ==  ORIENTATION) {
+        switch (mode) {
+            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;
+        }
+    }
+    writeCOMMAND(command, 3);
+    set_font(current_font);
+}
+//****************************************************************************************************
+void uLCD_4DGL :: display_power(char mode)     // set screen mode to value
+{
+    char command[3]= "";
+
+    command[0] = DISPPOWER;
+    command[1] = 0;
+    command[2] = mode;
+    writeCOMMAND(command, 3);
+}
+//****************************************************************************************************
+void uLCD_4DGL :: set_volume(char value)     // set sound volume to value
+{
+    char command[2]= "";
+
+    command[0] = SETVOLUME;
+    command[1] = value;
+
+    writeCOMMAND(command, 2);
+}
+
+
+//******************************************************************************************************
+int uLCD_4DGL :: getSTATUS(char *command, int number)   // read screen info and populate data
+{
+
+#if DEBUGMODE
+    pc.printf("\n");
+    pc.printf("New COMMAND : 0x%02X\n", 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() && resp < ARRAY_SIZE(response)) {
+        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", resp);
+#endif
+
+    return resp;
+}
+