Revision 4:844693a617dc, committed 2014-08-28

Comitter:

k4zuki

Date:

Thu Aug 28 06:26:48 2014 +0000

Parent:

3:f835b8daf9a0

Child:

5:7061ce47a359

Commit message:

VRAM usable (Microchip 23K256)

Changed in this revision

--- a/AkiSpiLcd.cpp	Thu Aug 28 01:51:04 2014 +0000
+++ b/AkiSpiLcd.cpp	Thu Aug 28 06:26:48 2014 +0000
@@ -5,14 +5,32 @@
 #include "mbed.h"
 #include "AkiSpiLcd.h"
 
-AkiSpiLcd::AkiSpiLcd(PinName mosi,PinName sck, PinName csl, PinName csr)
-    :_spi(mosi,NC,sck), _csl(csl), _csr(csr)
+AkiSpiLcd::AkiSpiLcd(PinName mosi, PinName miso, PinName sck, PinName csl, PinName csr)
+    :_spi(mosi, miso, sck), _csl(csl), _csr(csr)
 {
     _csl=0;
+    _csr=1;
     _spi.format(8,0);
     _spi.frequency(2000000);
     comflag = modeflag = clearflag = 0;
-    _csr=0;
+    _csr=0; //select VRAM
+    _spi.write(0x02);
+    _spi.write(0x60);
+    _spi.write(0x00);
+    for(int i=1;i<241;i++){
+        //write swapped i into RAM
+        _spi.write(
+        ( ( i & 0x01 ) << 7 )|
+        ( ( i & 0x02 ) << 5 )|
+        ( ( i & 0x04 ) << 3 )|
+        ( ( i & 0x08 ) << 1 )|
+        ( ( i & 0x10 ) >> 1 )|
+        ( ( i & 0x20 ) >> 3 )|
+        ( ( i & 0x40 ) >> 5 )|
+        ( ( i & 0x80 ) >> 7 )
+        );
+    _csr=1;
+    }
 }
 
 void AkiSpiLcd::cls()
@@ -137,3 +155,106 @@
     }
 }
 */
+
+    /** Reads single line (400 bits = 50 bytes) from a screen
+    */
+void AkiSpiLcd::ramReadSingle(int line, uint8_t* buffer, int screen){
+    screen &=1;
+    screen<<=7;
+//    uint8_t buffer[50];
+    line*=50;
+    int address=screen+line;
+    _csr=0; //select VRAM
+    _spi.write(0x03);
+    _spi.write(address>>8);
+    _spi.write(address&0xff);
+    for(int i=0;i<50;i++){
+        *(buffer+i)=_spi.write(0xaa);
+    }
+    _csr=1;
+//    return buffer;
+}
+
+    /** Reads multi lines(400 x N bits = 50 x N bytes) from a screen
+    */
+void AkiSpiLcd::ramReadMulti(int line, int length, uint8_t* buffer, int screen){
+    screen &=1;
+    screen<<=7;
+    line*=50;
+    int address=screen+line;
+    _csr=0; //select VRAM
+    _spi.write(0x03);
+    _spi.write(address>>8);
+    _spi.write(address&0xff);
+    for(int j=0;j<length;j++){
+        for(int i=0;i<50;i++){
+            *(buffer+i)=_spi.write(0xaa);
+        }
+    }
+    _csr=1;
+//    return buffer;
+}
+    
+    /** Writes single line (400 bits = 50 bytes) into a screen
+    */
+void AkiSpiLcd::ramWriteSingle(int line, uint8_t* data, int screen){
+    screen &=1;
+    screen<<=7;
+    line*=50;
+    int address=screen+line;
+    _csr=0; //select VRAM
+    _spi.write(0x02);
+    _spi.write(address>>8);
+    _spi.write(address&0xff);
+    for(int i=0;i<50;i++){
+        _spi.write(*(data+i));
+    }
+    _csr=1;
+}
+
+    /** Writes multi lines(400 x N bits = 50 x N bytes) into a screen
+    */
+void AkiSpiLcd::ramWriteMulti(int line, int length, uint8_t* data, int screen){
+    screen &=1;
+    screen<<=7;
+    line*=50;
+    
+    int address=screen+line;
+    
+    _csr=0; //select VRAM
+    _spi.write(0x02);
+    _spi.write(address>>8);
+    _spi.write(address&0xff);
+    for(int j=0;j<length;j++){
+        for(int i=0;i<50;i++){
+            _spi.write(*(data+j*50+i));
+        }
+    }
+    _csr=1;
+}
+
+    /** copies whole data in screen into LCD
+    */
+void AkiSpiLcd::ram2lcd(int screen){
+    screen &=1;
+    screen<<=7;
+
+    int address=screen;
+    int dummy=0;
+    
+    _csl=1;
+    _csr=0; //select VRAM
+    _spi.write(0x03);
+    _spi.write(address>>8);
+    _spi.write(address&0xff);
+    for(int j=0;j<240;j++){
+        for(int i=0;i<50;i++){
+            dummy=_spi.write(0xaa);
+        }
+    }
+    _spi.write(0x00);
+    _spi.write(0x00);
+    _csr=1;
+    wait_us(5);
+    _csl=0;
+}

--- a/AkiSpiLcd.h	Thu Aug 28 01:51:04 2014 +0000
+++ b/AkiSpiLcd.h	Thu Aug 28 06:26:48 2014 +0000
@@ -37,12 +37,13 @@
 public:
     /** Constructor
     * @param mosi SPI data input
+    * @param mosi SPI data output
     * @param sck SPI clock input
     * @param cs HIGH-active chip enable input
     * @param disp HIGH-active display enable input
     */
 //    AkiSpiLcd(PinName mosi,PinName sck, PinName cs, PinName disp);
-    AkiSpiLcd(PinName mosi,PinName sck, PinName csl, PinName csr);
+    AkiSpiLcd(PinName mosi, PinName miso, PinName sck, PinName csl, PinName csr);
 
     /** Clear screen
     */
@@ -59,15 +60,31 @@
     * @param length number of line to write
     * @param *data pointer to data
     */
-    void directUpdateMulti(int line, int length, uint8_t* data);
+    void directUpdateMulti(int startline, int length, uint8_t* data);
 
     /** Inverting internal COM signal
     */
     void cominvert();
     
-    /** Writes single line (400 bits = 50 bytes) into VRAM
+    /** Reads single line (400 bits = 50 bytes) from a screen
+    */
+    void ramReadSingle(int line, uint8_t* buffer, int screen);
+
+    /** Reads multi lines(400 x N bits = 50 x N bytes) from a screen
+    */
+    void ramReadMulti(int startline, int length, uint8_t* buffer, int screen);
     
+    /** Writes single line (400 bits = 50 bytes) into a screen
     */
+    void ramWriteSingle(int line, uint8_t* data, int screen);
+
+    /** Writes multi lines(400 x N bits = 50 x N bytes) into a screen
+    */
+    void ramWriteMulti(int startline, int length, uint8_t* data, int screen);
+    
+    /** copies whole data in screen into LCD
+    */
+    void ram2lcd(int screen);
 
 //    /** Enables/disables display. internal memory will not flushed
 //    * @param disp true = display is on / false = display is off