Toyomasa Watarai / Mbed 2 deprecated GT20L16J1Y_example

An example of GT20L16J1Y (15x16 Japanese Kanji ROM) and C12823 LCD

Dependencies:   C12832_lcd mbed

Fork of app-board-LCD by Chris Styles

main.cpp@3:c426b4b6d888, 2013-07-10 (annotated)

Committer:
MACRUM
Date:
Wed Jul 10 09:38:03 2013 +0000
Revision:
3:c426b4b6d888
Parent:
2:a87e255a8f3a 
An example of GT20L16J1Y (15x16 Japanese Kanji ROM) and C12832 LCD.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dreschpe 0:f6a57b843f79 1 #include "mbed.h"
dreschpe 1:1c6a9eaf55b5 2 #include "C12832_lcd.h"
dreschpe 0:f6a57b843f79 3
MACRUM 3:c426b4b6d888 4 unsigned char matrixdata[32];
chris 2:a87e255a8f3a 5 C12832_LCD lcd;
dreschpe 1:1c6a9eaf55b5 6
MACRUM 3:c426b4b6d888 7 void read_font(unsigned short code) {
MACRUM 3:c426b4b6d888 8 SPI spi(p11, p12, p13); // mosi, miso, sclk
MACRUM 3:c426b4b6d888 9 DigitalOut cs(p10);
MACRUM 3:c426b4b6d888 10 unsigned char c1, c2, MSB,LSB;
MACRUM 3:c426b4b6d888 11 uint32_t Address, seq;
MACRUM 3:c426b4b6d888 12
MACRUM 3:c426b4b6d888 13 // SJIS to kuten code conversion
MACRUM 3:c426b4b6d888 14 c1 = (code>>8);
MACRUM 3:c426b4b6d888 15 c2 = (code & 0xFF);
MACRUM 3:c426b4b6d888 16 seq = (c1<=159 ? c1-129 : c1-193)*188 + (c2<=126 ? c2-64 : c2-65);
MACRUM 3:c426b4b6d888 17 MSB = seq / 94 + 1;
MACRUM 3:c426b4b6d888 18 LSB = seq % 94 + 1;
MACRUM 3:c426b4b6d888 19 Address = 0;
MACRUM 3:c426b4b6d888 20
MACRUM 3:c426b4b6d888 21 if( MSB >= 1 && MSB <= 15 && LSB >= 1 && LSB <= 94)
MACRUM 3:c426b4b6d888 22 Address =( (MSB - 1) * 94 + (LSB - 1))*32;
MACRUM 3:c426b4b6d888 23 else if(MSB >= 16 && MSB <= 47 && LSB >= 1 && LSB <= 94)
MACRUM 3:c426b4b6d888 24 Address =( (MSB - 16) * 94 + (LSB - 1))*32 + 0x0AA40L;
MACRUM 3:c426b4b6d888 25 else if(MSB >= 48 && MSB <= 84 && LSB >= 1 && LSB <= 94)
MACRUM 3:c426b4b6d888 26 Address = ((MSB - 48) * 94 + (LSB - 1))*32 + 0x21CDFL;
MACRUM 3:c426b4b6d888 27 else if(MSB == 85 && LSB >= 1 && LSB <= 94)
MACRUM 3:c426b4b6d888 28 Address = ((MSB - 85) * 94 + (LSB - 1))*32 + 0x3C4A0L;
MACRUM 3:c426b4b6d888 29 else if(MSB >= 88 && MSB <= 89 && LSB >= 1 && LSB <= 94)
MACRUM 3:c426b4b6d888 30 Address = ((MSB - 88) * 94 + (LSB - 1))*32 + 0x3D060L;
MACRUM 3:c426b4b6d888 31
MACRUM 3:c426b4b6d888 32 // Deselect the device
MACRUM 3:c426b4b6d888 33 cs = 1;
MACRUM 3:c426b4b6d888 34
MACRUM 3:c426b4b6d888 35 // Setup the spi for 8 bit data, high steady state clock
MACRUM 3:c426b4b6d888 36 spi.format(8,3);
MACRUM 3:c426b4b6d888 37 spi.frequency(1000000);
MACRUM 3:c426b4b6d888 38
MACRUM 3:c426b4b6d888 39 // Select the device by seting chip select low
MACRUM 3:c426b4b6d888 40 cs = 0;
MACRUM 3:c426b4b6d888 41 spi.write(0x03); // Read data byte
MACRUM 3:c426b4b6d888 42 spi.write(Address>>16 & 0xff);
MACRUM 3:c426b4b6d888 43 spi.write(Address>>8 & 0xff);
MACRUM 3:c426b4b6d888 44 spi.write(Address & 0xff);
MACRUM 3:c426b4b6d888 45
MACRUM 3:c426b4b6d888 46 // Send a dummy byte to receive the contents of the WHOAMI register
MACRUM 3:c426b4b6d888 47 for(int i=0; i<32; i++)
MACRUM 3:c426b4b6d888 48 {
MACRUM 3:c426b4b6d888 49 matrixdata[i]=spi.write(0x00);
MACRUM 3:c426b4b6d888 50 }
MACRUM 3:c426b4b6d888 51
MACRUM 3:c426b4b6d888 52 // Deselect the device
MACRUM 3:c426b4b6d888 53 cs = 1;
MACRUM 3:c426b4b6d888 54 }
MACRUM 3:c426b4b6d888 55
MACRUM 3:c426b4b6d888 56
MACRUM 3:c426b4b6d888 57 void draw_kanji(int offset_x, int offset_y)
MACRUM 3:c426b4b6d888 58 {
MACRUM 3:c426b4b6d888 59 int color;
MACRUM 3:c426b4b6d888 60 for(int x=0; x<32; x++)
MACRUM 3:c426b4b6d888 61 {
MACRUM 3:c426b4b6d888 62 for(int y=0; y<8; y++)
MACRUM 3:c426b4b6d888 63 {
MACRUM 3:c426b4b6d888 64 if (matrixdata[x] & (1<<y))
MACRUM 3:c426b4b6d888 65 color = 1;
MACRUM 3:c426b4b6d888 66 else
MACRUM 3:c426b4b6d888 67 color = 0;
MACRUM 3:c426b4b6d888 68 lcd.pixel(x%16 + offset_x, y+(8*(x>>4)) + offset_y, color);
MACRUM 3:c426b4b6d888 69 }
MACRUM 3:c426b4b6d888 70 }
MACRUM 3:c426b4b6d888 71 lcd.copy_to_lcd();
MACRUM 3:c426b4b6d888 72 }
MACRUM 3:c426b4b6d888 73
dreschpe 0:f6a57b843f79 74 int main()
dreschpe 0:f6a57b843f79 75 {
MACRUM 3:c426b4b6d888 76 unsigned short kbuf[16] = {0x93fa, 0x967b, 0x8cea, 0x955c, 0x8ea6};
MACRUM 3:c426b4b6d888 77
chris 2:a87e255a8f3a 78 lcd.cls();
dreschpe 0:f6a57b843f79 79
MACRUM 3:c426b4b6d888 80 for(int i=0; i<5; i++) {
MACRUM 3:c426b4b6d888 81 read_font(kbuf[i]);
MACRUM 3:c426b4b6d888 82 draw_kanji(16*i, 0);
dreschpe 0:f6a57b843f79 83 }
MACRUM 3:c426b4b6d888 84
dreschpe 0:f6a57b843f79 85 }