Diff: C12832.cpp

Revision:

0:9718a8784c1b

diff -r 000000000000 -r 9718a8784c1b C12832.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/C12832.cpp	Wed Jan 16 10:53:26 2019 +0000
@@ -0,0 +1,227 @@
+/* mbed library for the mbed Lab Board  128*32 pixel LCD
+ * use C12832 controller
+ * Copyright (c) 2012 Peter Drescher - DC2PD
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * 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.
+ *
+ * Library überarbeitet: 15.1.2014 Copyright (c) Dr.C.Eichtinger
+ * File GraphicDisplay und TextDisplay, sowie small_7 font gestrichen
+ * C12832.h und C12832.cpp überarbeitet und mit Ziffernfont ergänzt
+ * Erweiterung: Zeichengröße 1..4
+ */
+
+#include "mbed.h"
+#include "C12832.h"
+#include <stdio.h>
+#include "font.h"
+
+
+
+C12832::C12832(PinName mosi, PinName sck, PinName reset, PinName a0, PinName ncs)
+    : _spi(mosi,NC,sck),_reset(reset),_A0(a0),_CS(ncs)
+{  
+    lcd_reset();
+}
+
+void C12832::invert(unsigned int o)
+{
+    if(o == 0) wr_cmd(0xA6);
+    else wr_cmd(0xA7);
+}
+
+
+
+void C12832::wr_cmd(unsigned char cmd)
+{
+    _A0 = 0;
+    _CS = 0;
+    _spi.write(cmd);
+    _CS = 1;
+}
+
+void C12832::wr_dat(unsigned char dat)
+{
+    _A0 = 1;
+    _CS = 0;
+    _spi.write(dat);
+    _CS = 1;
+}
+
+void C12832::lcd_reset()
+{
+
+    _spi.format(8,3);                 // 8 bit spi mode 3
+    _spi.frequency(20000000);          // 19,2 Mhz SPI clock
+    _A0 = 0;
+    _CS = 1;
+    _reset = 0;                        // display reset
+    wait_us(50);
+    _reset = 1;                       // end reset
+    wait_ms(5);
+
+    /* Start Initial Sequence ----------------------------------------------------*/
+
+    wr_cmd(0xAE);   //  display off
+    wr_cmd(0xA2);   //  bias voltage
+
+    wr_cmd(0xA0);
+    wr_cmd(0xC8);   //  colum normal
+
+    wr_cmd(0x22);   //  voltage resistor ratio
+    wr_cmd(0x2F);   //  power on
+    //wr_cmd(0xA4);   //  LCD display ram
+    wr_cmd(0x40);   // start line = 0
+    wr_cmd(0xAF);     // display ON
+
+    wr_cmd(0x81);   //  set contrast
+    wr_cmd(0x17);   //  set contrast
+
+    wr_cmd(0xA6);     // display normal
+
+
+    // clear and update LCD
+    memset(buffer,0x00,512);  // clear display buffer
+    copy_to_lcd();
+}
+
+void C12832::pixel(int x, int y, int color)
+{
+    // first check parameter
+    if(x > 127 || y > 31 || x < 0 || y < 0) return;
+
+        if(color == 0)
+            buffer[x + ((y/8) * 128)] &= ~(1 << (y%8));  // erase pixel
+        else
+            buffer[x + ((y/8) * 128)] |= (1 << (y%8));   // set pixel
+
+}
+
+void C12832::copy_to_lcd(void)
+{
+    
+    int i=0;
+    
+    //page 0
+    wr_cmd(0x00);      // set column low nibble 0
+    wr_cmd(0x10);      // set column hi  nibble 0
+    wr_cmd(0xB0);      // set page address  0
+    _A0 = 1;
+    for(i=0; i<128; i++) {
+        wr_dat(buffer[i]);
+    }
+
+    // page 1
+    wr_cmd(0x00);      // set column low nibble 0
+    wr_cmd(0x10);      // set column hi  nibble 0
+    wr_cmd(0xB1);      // set page address  1
+    _A0 = 1;
+    for(i=128; i<256; i++) {
+        wr_dat(buffer[i]);
+    }
+
+    //page 2
+    wr_cmd(0x00);      // set column low nibble 0
+    wr_cmd(0x10);      // set column hi  nibble 0
+    wr_cmd(0xB2);      // set page address  2
+    _A0 = 1;
+    for(i=256; i<384; i++) {
+        wr_dat(buffer[i]);
+    }
+
+    //page 3
+    wr_cmd(0x00);      // set column low nibble 0
+    wr_cmd(0x10);      // set column hi  nibble 0
+    wr_cmd(0xB3);      // set page address  3
+    _A0 = 1;
+
+    _CS = 0;
+    
+    for(i=384; i<512; i++) {
+        wr_dat(buffer[i]);
+    }
+
+}
+
+void C12832::cls(void)
+{
+    memset(buffer,0x00,512);  // clear display buffer
+    copy_to_lcd();
+}
+
+void C12832::rectangle(int x1, int x2, int y1, int y2)
+{
+    for(int i=x1;i<=x2;i++)
+    {
+        pixel(i,y1,1);
+        pixel(i,y2,1);
+    }
+    
+    for(int i=y1;i<=y2;i++)
+    {
+        pixel(x1,i,1);
+        pixel(x2,i,1);
+    }
+}
+
+
+void C12832::text(int ix, int iy, char* ctext, int length, int size)
+{
+    int i;
+    for(i=0;i<length;i++)
+    {
+        character(ix+i*6*size,iy,ctext[i],size);    
+    }
+}
+
+
+int C12832::character(int ix, int iy, char c, int size)
+{
+    int code = 0;
+    
+    if(ix >127 || ix < 0) return -1;
+    if(iy >31  || iy < 0) return -1;
+    if(c>= 0x20){
+        code = (int)(c - 0x20);
+    } else if(c == 0x00) {
+        code = 96;
+    } else {
+        return -1;
+    }   
+    if((size < 0)||(size > 4)) return -1;
+    
+    int index = code*5;
+    unsigned char  codebyte = 0;
+    unsigned char codebit = 0;
+    
+    
+    for(int i=0; i< 5 ; i++)
+    {
+        codebyte = font[index+i];
+        for(int j=0; j<7; j++)
+        {
+             codebit =  codebyte & (1<<j);
+             for (int k=0; k<size; k++) {
+                for(int l=0;l<size;l++) {
+                    pixel(ix+i*size+k,iy+l+j*size,codebit);   
+                }             
+             }
+             
+        }     
+    } 
+    return 0;
+}    
+
+void C12832::set_contrast(unsigned char volume)
+{
+    wr_cmd(0x81);      //  set volume
+    wr_cmd(volume & 0x3F);
+}   
+
+