Diff: spilcd.h

Revision:

0:304c871df0a8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/spilcd.h	Sun Dec 06 16:28:01 2009 +0000
@@ -0,0 +1,85 @@
+// AD-12684-SPI control class
+// version 0.1
+// created by Sim (http://mbed.org/users/Sim/)
+//
+// About AD-12864-SPI, see http://www.aitendo.co.jp/product/1622 .
+
+#ifndef __SPILCD_H__
+#define __SPILCD_H__
+
+#include "mbed.h"
+
+class SPILCD {
+private:
+    DigitalOut cs, rst, a0;
+    SPI spi;
+
+    // boot up sequence
+    void init(){
+        spi.format(8,0); // nazo
+        spi.frequency(20000000); // modify later
+        
+        // reset
+        wait_ms(10);
+        rst = 0;
+        wait_us(1);
+        rst = 1;
+        wait_us(1);
+    
+        // initialize sequence
+        cmd(0xa2);    // (11) LCD Bias Set ... 1/9 bias (see 2.4.11)
+        cmd(0xa0);    // (8)  ADC Select ... normal (see 2.4.8)
+        cmd(0xc8);    // (15) Common Output Mode Select ... Reverse (see 2.4.15)
+        cmd(0x24);    // (17) V5 Volatge Regulator Internal Resister Ratio Set (see 2.4.17)
+        cmd(0x81);    // (18) set electronic volume mode (see 2.4.18)
+        cmd(0x1e);    //      electronic volume data 00-3f ... control your own value
+        cmd(0x2f);    // (16) power control set (see 2.4.16)
+        cmd(0x40);    // (2)  Display Start Line Set ... 0 (see 2.4.2)
+        cmd(0xe0);    // (6)  Write Mode Set
+        cmd(0xaf);    // (1)  display on (see 2.4.1)
+    }
+
+public:
+
+    // constructor
+    SPILCD(PinName cs_pin, PinName rst_pin, PinName a0_pin, PinName mosi_pin, PinName miso_pin, PinName sclk_pin)
+        : cs(cs_pin), rst(rst_pin), a0(a0_pin), spi(mosi_pin, miso_pin, sclk_pin) {
+        
+        init();
+        cls();
+    }
+
+    // wipe all screen
+    void cls(void){
+        int x, y;
+        for(y = 0; y < 8; y++){
+            moveto(0, y);
+            for(x = 0; x < 128; x++) write(0x00);
+        }
+        moveto(0, 0);
+    }
+
+    // move position to (x, 8 * y)
+    void moveto(int x, int y){
+        cmd(0xb0 | (y & 0x0f)); // Page Address Set (see 2.4.3)
+        cmd(0x10 | (x >> 4 & 0x0f)); // Column Address Set (see 2.4.4)
+        cmd(x & 0x0f);
+    }
+
+    // write command
+    void cmd(unsigned char c){
+        cs = a0 = 0;
+        spi.write(c);
+        cs = 1;
+    }
+    
+    // write data
+    void write(unsigned char c){
+        cs = 0;
+        a0 = 1;
+        spi.write(c);
+        cs = 1;
+    }
+};
+
+#endif