Takanobu Muraguchi
ks0713 SPI library. This library includes a small 5x5 ascii font and line function.
Diff: ks0713_spi.cpp
- Revision:
- 1:408627d73aa8
- Parent:
- 0:7b044b89e49c
diff -r 7b044b89e49c -r 408627d73aa8 ks0713_spi.cpp
--- a/ks0713_spi.cpp Sun Feb 26 15:52:10 2012 +0000
+++ b/ks0713_spi.cpp Sun Feb 26 16:01:29 2012 +0000
@@ -8,8 +8,7 @@
}
-void KS0713_SPI::init()
-{
+void KS0713_SPI::init() {
_cs1b=0;
_rs =0;
_rstb=0;
@@ -19,204 +18,185 @@
wait(0.015); // wait for power up (reset low term must be greater than 900[ns])
-
+
_rstb=1; // de-assert resetb
-
-
+
+
writeCommand(0xA2); // LCD BIAS selection (1/65duty, 1/9bias)
writeCommand(0xA1); // ADC selection (SEG128->SEG0)
writeCommand(0xC0); // SHL selection (COM0->COM64)
wait_ms(1);
- /*Power control
- Displaytech screen uses built-in power circuits
- Switch on in order as specified in data sheet
- wait 1ms between each command
- 1st - Voltage converter ON = 0x2C
- 2nd - Voltage regulator ON = 0x2E
- 3rd - Voltage follower ON = 0x2F */
- writeCommand(0x2C); //0x2C = Voltage converter ON
- wait_ms(1);
- writeCommand(0x2E); //0x2E = Voltage regulator ON
- wait_ms(1);
- writeCommand(0x2F); //0x2F = Voltage follower ON
-
-
- // Regulator Resistor Selection
- /*Regulator resistor select
- Sets the internal resistance ratio used in the internal voltage regulator
- Refer to datasheet p.42
- This works as a corse contrast control
- 0x20 = 1.9
- 0x21 = 2.19
- 0x22 = 2.55
- 0x23 = 3.02
- 0x24 = 3.61
- 0x25 = 4.35
- 0x26 = 5.29
- 0x27 = 6.48 */
- writeCommand(0x23);
+ /*Power control
+ Displaytech screen uses built-in power circuits
+ Switch on in order as specified in data sheet
+ wait 1ms between each command
+ 1st - Voltage converter ON = 0x2C
+ 2nd - Voltage regulator ON = 0x2E
+ 3rd - Voltage follower ON = 0x2F */
+ writeCommand(0x2C); //0x2C = Voltage converter ON
+ wait_ms(1);
+ writeCommand(0x2E); //0x2E = Voltage regulator ON
+ wait_ms(1);
+ writeCommand(0x2F); //0x2F = Voltage follower ON
+
- /*Set reference voltage register
- Used as a fine contrast control
- 0x81 = Enter voltage register set mode
- 0x00 to 0x3F = 0 to 63 */
- writeCommand(0x81); //0x81 = Enter voltage register set mode
- writeCommand(0x20); //0x20 = Set ref voltage to 20
-
- /*Initial display line
- Specify DDRAM line for COM1
- 0x40 + display line */
- writeCommand(0x40); //Set initial line to 0
+ // Regulator Resistor Selection
+ /*Regulator resistor select
+ Sets the internal resistance ratio used in the internal voltage regulator
+ Refer to datasheet p.42
+ This works as a corse contrast control
+ 0x20 = 1.9
+ 0x21 = 2.19
+ 0x22 = 2.55
+ 0x23 = 3.02
+ 0x24 = 3.61
+ 0x25 = 4.35
+ 0x26 = 5.29
+ 0x27 = 6.48 */
+ writeCommand(0x23);
+
+ /*Set reference voltage register
+ Used as a fine contrast control
+ 0x81 = Enter voltage register set mode
+ 0x00 to 0x3F = 0 to 63 */
+ writeCommand(0x81); //0x81 = Enter voltage register set mode
+ writeCommand(0x20); //0x20 = Set ref voltage to 20
+
+ /*Initial display line
+ Specify DDRAM line for COM1
+ 0x40 + display line */
+ writeCommand(0x40); //Set initial line to 0
- /*Set page address
- Sets the initial page address to write to
- 0xB0 + page address 0 to 8 */
- writeCommand(0xB0); //Initial page set to 0
-
- /*Set column address
- Sets the initial column to write to
- for LSB (b3-b0) 0x00 + first nibble
- for MSB (b7-b4) 0x10 + second nibble
- 0x00 to 0x83 = column 0 to 131 */
- writeCommand(0x00); //Sets LSB to 0
- writeCommand(0x10); //Sets MSB to 0 - column is now set to 0
-
- /*Reverse display
- Selects either a normal display or a reverse display
- 0xA6 = normal
- 0xA7 = reverse */
- writeCommand(0xA6); //Sets display to normal
-
- /*Set static indicator
- Sets up a static indicator on the display
- See datasheet p.42
- This is a 2 instruction cycle
- 0xAC = static indicator ON
- 0xAD = static indicator OFF
- Next instruction to set indicator type:
- 0x00 = OFF
- 0x01 = ON - 1 second blinking
- 0x02 = ON - 0.5 second blinking
- 0x03 = ON - always ON */
- writeCommand(0xAD); //Static indicator OFF
- writeCommand(0x00); //OFF - 0.5 second blinking
-
- /*Display ON/OFF
- Switched the display to on or off
- 0xAE = Display OFF
- 0xAF = Display ON */
- writeCommand(0xAF);
-
- clear();
- update();
-
+ /*Set page address
+ Sets the initial page address to write to
+ 0xB0 + page address 0 to 8 */
+ writeCommand(0xB0); //Initial page set to 0
+
+ /*Set column address
+ Sets the initial column to write to
+ for LSB (b3-b0) 0x00 + first nibble
+ for MSB (b7-b4) 0x10 + second nibble
+ 0x00 to 0x83 = column 0 to 131 */
+ writeCommand(0x00); //Sets LSB to 0
+ writeCommand(0x10); //Sets MSB to 0 - column is now set to 0
+
+ /*Reverse display
+ Selects either a normal display or a reverse display
+ 0xA6 = normal
+ 0xA7 = reverse */
+ writeCommand(0xA6); //Sets display to normal
+
+ /*Set static indicator
+ Sets up a static indicator on the display
+ See datasheet p.42
+ This is a 2 instruction cycle
+ 0xAC = static indicator ON
+ 0xAD = static indicator OFF
+ Next instruction to set indicator type:
+ 0x00 = OFF
+ 0x01 = ON - 1 second blinking
+ 0x02 = ON - 0.5 second blinking
+ 0x03 = ON - always ON */
+ writeCommand(0xAD); //Static indicator OFF
+ writeCommand(0x00); //OFF - 0.5 second blinking
+
+ /*Display ON/OFF
+ Switched the display to on or off
+ 0xAE = Display OFF
+ 0xAF = Display ON */
+ writeCommand(0xAF);
+
+ clear();
+ update();
+
_x=0;
_y=0;
}
-void KS0713_SPI::writeCommand(unsigned char data)
-{
+void KS0713_SPI::writeCommand(unsigned char data) {
_cs1b=0;
_rs =0;
wait_us(1); // setup 55[ns]
- _spi.write(data);
+ _spi.write(data);
wait_us(1); // hold 180[ns]
_cs1b=1;
}
-void KS0713_SPI::writeData(unsigned char data)
-{
+void KS0713_SPI::writeData(unsigned char data) {
_cs1b=0;
_rs =1;
wait_us(1); // setup 55[ns]
- _spi.write(data);
+ _spi.write(data);
wait_us(1); // hold 180[ns]
_cs1b=1;
}
-void KS0713_SPI::clear()
-{
- for (int page=0;page<MBED_KS0713_SPI_HEIGHT/8;page++)
- {
- for (int column=0;column<MBED_KS0713_SPI_WIDTH;column++)
- {
+void KS0713_SPI::clear() {
+ for (int page=0; page<MBED_KS0713_SPI_HEIGHT/8; page++) {
+ for (int column=0; column<MBED_KS0713_SPI_WIDTH; column++) {
vram[column][page]=0x00;
- }
+ }
}
}
-void KS0713_SPI::fill()
-{
- for (int page=0;page<MBED_KS0713_SPI_HEIGHT/8;page++)
- {
- for (int column=0;column<MBED_KS0713_SPI_WIDTH;column++)
- {
+void KS0713_SPI::fill() {
+ for (int page=0; page<MBED_KS0713_SPI_HEIGHT/8; page++) {
+ for (int column=0; column<MBED_KS0713_SPI_WIDTH; column++) {
vram[column][page]=0xFF;
- }
+ }
}
}
-void KS0713_SPI::update()
-{
- for (int page=0;page<MBED_KS0713_SPI_HEIGHT/8;page++)
- {
+void KS0713_SPI::update() {
+ for (int page=0; page<MBED_KS0713_SPI_HEIGHT/8; page++) {
writeCommand(0xB0+page);
writeCommand(0x10);
writeCommand(0x00);
- for (int column=0;column<100;column++)
- {
+ for (int column=0; column<100; column++) {
writeData(vram[column][page]);
- }
+ }
}
}
-void KS0713_SPI::locate(int x,int y)
-{
+void KS0713_SPI::locate(int x,int y) {
_x=x;
_y=y;
}
-void KS0713_SPI::line(int x1, int y1, int x2, int y2)
-{
+void KS0713_SPI::line(int x1, int y1, int x2, int y2) {
int dist_x;
int dist_y;
int calc_point;
- if(x2>x1) {
+ if (x2>x1) {
dist_x = x2-x1;
- } else
- {
+ } else {
dist_x = x1-x2;
}
- if(y2>y1) {
+ if (y2>y1) {
dist_y = y2-y1;
- } else
- {
+ } else {
dist_y = y1-y2;
}
-
+
- if(dist_x>dist_y)
- {
+ if (dist_x>dist_y) {
// x direction
- if(x1>x2)
- // step -1
+ if (x1>x2)
+ // step -1
{
- for (int x=x1;x>=x2;x--)
- {
+ for (int x=x1; x>=x2; x--) {
if (x<0)
break;
calc_point = y1+ ( (y2-y1) * (x-x1) / (x2-x1) );
if (calc_point>=0 && calc_point<MBED_KS0713_SPI_HEIGHT)
- vram[x][(calc_point>>3)] |= ( 0x1 <<(calc_point&0x7));
+ vram[x][(calc_point>>3)] |= ( 0x1 <<(calc_point&0x7));
}
- }
- else
- // step ++
+ } else
+ // step ++
{
// point 1 -> point 2
- for (int x=x1;x<=x2;x++)
- {
+ for (int x=x1; x<=x2; x++) {
if (x>=MBED_KS0713_SPI_WIDTH)
break;
calc_point = y1+( (y2-y1) * (x-x1) / (x2-x1) );
@@ -225,68 +205,61 @@
}
}
- }
- else
- {
+ } else {
// y direction
- if(y1>y2)
- // step -1
+ if (y1>y2)
+ // step -1
{
- for (int y=y1;y>=y2;y--)
- {
+ for (int y=y1; y>=y2; y--) {
if (y<0)
break;
calc_point = x1+( (x2-x1) * (y-y1) / (y2-y1) );
if (calc_point>=0 && calc_point<MBED_KS0713_SPI_WIDTH)
- vram[calc_point][y>>3] |= ( 0x1 <<(y&0x7));
+ vram[calc_point][y>>3] |= ( 0x1 <<(y&0x7));
}
- }
- else
- // step ++
+ } else
+ // step ++
{
// point 1 -> point 2
- for (int y=y1;y<=y2;y++)
- {
+ for (int y=y1; y<=y2; y++) {
if (y>=MBED_KS0713_SPI_HEIGHT)
break;
calc_point = x1+( (x2-x1) * (y-y1) / (y2-y1) );
if (calc_point>=0 && calc_point<MBED_KS0713_SPI_WIDTH)
- vram[calc_point][y>>3] |= ( 0x1 <<(y&0x7));
+ vram[calc_point][y>>3] |= ( 0x1 <<(y&0x7));
}
}
- }
+ }
}
-int KS0713_SPI::_putc(int value)
-{
+int KS0713_SPI::_putc(int value) {
unsigned char fontdata;
- for(int cx=0;cx<5;cx++){
- if( _x+cx>=MBED_KS0713_SPI_WIDTH ){
+ for (int cx=0; cx<5; cx++) {
+ if ( _x+cx>=MBED_KS0713_SPI_WIDTH ) {
break;
}
fontdata = font5x5[value-' '][cx];
- for (int cy=0;cy<5;cy++){
+ for (int cy=0; cy<5; cy++) {
if (_y+cy>=MBED_KS0713_SPI_HEIGHT) {
break ;
}
if (fontdata & 0x1) {
- vram[_x+cx][(_y+cy)>>3] |= ( 0x1 <<((_y+cy)&0x7));
+ vram[_x+cx][(_y+cy)>>3] |= ( 0x1 <<((_y+cy)&0x7));
} else {
- vram[_x+cx][(_y+cy)>>3] &= ~( 0x1 <<((_y+cy)&0x7));
-
+ vram[_x+cx][(_y+cy)>>3] &= ~( 0x1 <<((_y+cy)&0x7));
+
}
fontdata=fontdata>>1;
}
}
-
+
_x+=6;
return value;
}
-int KS0713_SPI::_getc()
-{
+int KS0713_SPI::_getc() {
return -1;
}