Guangmin Tang
tr
Diff: N5110.cpp
- Revision:
- 17:780a542d5f8b
- Parent:
- 15:ee645611ff94
- Child:
- 18:1af393359298
diff -r b37a3a260598 -r 780a542d5f8b N5110.cpp
--- a/N5110.cpp Tue Mar 10 19:33:55 2015 +0000
+++ b/N5110.cpp Tue Mar 17 12:56:03 2015 +0000
@@ -139,7 +139,7 @@
{
int i;
sce->write(0); //set CE low to begin frame
- for(i = 0; i < 504; i++) { // 48 x 84 bits = 504 bytes
+ for(i = 0; i < WIDTH * HEIGHT; i++) { // 48 x 84 bits = 504 bytes
spi->write(0x00); // send 0's
}
sce->write(1); // set CE high to end frame
@@ -149,18 +149,10 @@
// function to set the XY address in RAM for subsequenct data write
void N5110::setXYAddress(int x, int y)
{
- // check whether address is in range
- if (x > 83)
- x=83;
- if (y > 5)
- y=5;
- if (x < 0)
- x=0;
- if (y < 0)
- y=0;
-
- sendCommand(0x80 | x); // send addresses to display with relevant mask
- sendCommand(0x40 | y);
+ if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
+ sendCommand(0x80 | x); // send addresses to display with relevant mask
+ sendCommand(0x40 | y);
+ }
}
// These functions are used to set, clear and get the value of pixels in the display
@@ -168,21 +160,28 @@
// function must be called after set and clear in order to update the display
void N5110::setPixel(int x, int y)
{
- // calculate bank and shift 1 to required position in the data byte
- buffer[x][y/8] |= (1 << y%8);
+ if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
+ // calculate bank and shift 1 to required position in the data byte
+ buffer[x][y/8] |= (1 << y%8);
+ }
}
void N5110::clearPixel(int x, int y)
{
- // calculate bank and shift 1 to required position (using bit clear)
- buffer[x][y/8] &= ~(1 << y%8);
+ if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
+ // calculate bank and shift 1 to required position (using bit clear)
+ buffer[x][y/8] &= ~(1 << y%8);
+ }
}
int N5110::getPixel(int x, int y)
{
- // return relevant bank and mask required bit
- return (int) buffer[x][y/8] & (1 << y%8);
-
+ if (x>=0 && x<WIDTH && y>=0 && y<HEIGHT) { // check within range
+ // return relevant bank and mask required bit
+ return (int) buffer[x][y/8] & (1 << y%8);
+ } else {
+ return 0;
+ }
}
// function to refresh the display
@@ -196,8 +195,8 @@
sce->write(0); //set CE low to begin frame
- for(j = 0; j < 6; j++) { // be careful to use correct order (j,i) for horizontal addressing
- for(i = 0; i < 84; i++) {
+ for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
+ for(i = 0; i < WIDTH; i++) {
spi->write(buffer[i][j]); // send buffer
}
}
@@ -210,8 +209,8 @@
void N5110::randomiseBuffer()
{
int i,j;
- for(j = 0; j < 6; j++) { // be careful to use correct order (j,i) for horizontal addressing
- for(i = 0; i < 84; i++) {
+ for(j = 0; j < BANKS; j++) { // be careful to use correct order (j,i) for horizontal addressing
+ for(i = 0; i < WIDTH; i++) {
buffer[i][j] = rand()%256; // generate random byte
}
}
@@ -223,10 +222,10 @@
{
for (int i = 0; i < 5 ; i++ ) {
buffer[x+i][y] = font5x7[(c - 32)*5 + i];
- // array is offset by 32 relative to ASCII, each character is 5 pixels wide
+ // array is offset by 32 relative to ASCII, each character is 5 pixels wide
}
-
- refresh(); // this sends the buffer to the display and sets address (cursor) back to 0,0
+
+ refresh(); // this sends the buffer to the display and sets address (cursor) back to 0,0
}
// function to print string at specified position
@@ -261,8 +260,8 @@
void N5110::clearBuffer()
{
int i,j;
- for (i=0; i<84; i++) { // loop through the banks and set the buffer to 0
- for (j=0; j<6; j++) {
+ for (i=0; i<WIDTH; i++) { // loop through the banks and set the buffer to 0
+ for (j=0; j<BANKS; j++) {
buffer[i][j]=0;
}
}
@@ -274,7 +273,7 @@
int i;
- for (i=0; i<84; i++) { // loop through array
+ for (i=0; i<WIDTH; i++) { // loop through array
// elements are normalised from 0.0 to 1.0, so multiply
// by 47 to convert to pixel range, and subtract from 47
// since top-left is 0,0 in the display geometry
@@ -283,5 +282,113 @@
refresh();
+}
-}
\ No newline at end of file
+// function to draw circle
+void N5110:: drawCircle(int x0,int y0,int radius,int fill)
+{
+ // from http://en.wikipedia.org/wiki/Midpoint_circle_algorithm
+ int x = radius;
+ int y = 0;
+ int radiusError = 1-x;
+
+ while(x >= y) {
+
+ // if transparent, just draw outline
+ if (fill == 0) {
+ setPixel( x + x0, y + y0);
+ setPixel(-x + x0, y + y0);
+ setPixel( y + x0, x + y0);
+ setPixel(-y + x0, x + y0);
+ setPixel(-y + x0, -x + y0);
+ setPixel( y + x0, -x + y0);
+ setPixel( x + x0, -y + y0);
+ setPixel(-x + x0, -y + y0);
+ } else { // drawing filled circle, so draw lines between points at same y value
+
+ int type = (fill==1) ? 1:0; // black or white fill
+
+ drawLine(x+x0,y+y0,-x+x0,y+y0,type);
+ drawLine(y+x0,x+y0,-y+x0,x+y0,type);
+ drawLine(y+x0,-x+y0,-y+x0,-x+y0,type);
+ drawLine(x+x0,-y+y0,-x+x0,-y+y0,type);
+ }
+
+
+ y++;
+ if (radiusError<0) {
+ radiusError += 2 * y + 1;
+ } else {
+ x--;
+ radiusError += 2 * (y - x) + 1;
+ }
+ }
+
+ refresh();
+}
+
+void N5110::drawLine(int x0,int y0,int x1,int y1,int type)
+{
+ int y_range = y1-y0; // calc range of y and x
+ int x_range = x1-x0;
+ int start,stop,step;
+
+ // if dotted line, set step to 2, else step is 1
+ step = (type==2) ? 2:1;
+
+ // make sure we loop over the largest range to get the most pixels on the display
+ // for instance, if drawing a vertical line (x_range = 0), we need to loop down the y pixels
+ // or else we'll only end up with 1 pixel in the x column
+ if ( abs(x_range) > abs(y_range) ) {
+
+ // ensure we loop from smallest to largest or else for-loop won't run as expected
+ start = x1>x0 ? x0:x1;
+ stop = x1>x0 ? x1:x0;
+
+ // loop between x pixels
+ for (int x = start; x<= stop ; x+=step) {
+ // do linear interpolation
+ int y = y0 + (y1-y0)*(x-x0)/(x1-x0);
+
+ if (type == 0) // if 'white' line, turn off pixel
+ clearPixel(x,y);
+ else
+ setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
+ }
+ } else {
+
+ // ensure we loop from smallest to largest or else for-loop won't run as expected
+ start = y1>y0 ? y0:y1;
+ stop = y1>y0 ? y1:y0;
+
+ for (int y = start; y<= stop ; y+=step) {
+ // do linear interpolation
+ int x = x0 + (x1-x0)*(y-y0)/(y1-y0);
+
+ if (type == 0) // if 'white' line, turn off pixel
+ clearPixel(x,y);
+ else
+ setPixel(x,y); // else if 'black' or 'dotted' turn on pixel
+
+ }
+ }
+
+ refresh();
+}
+
+void N5110::drawRect(int x0,int y0,int width,int height,int fill)
+{
+
+ if (fill == 0) { // transparent, just outline
+ drawLine(x0,y0,x0+width,y0,1); // top
+ drawLine(x0,y0+height,x0+width,y0+height,1); // bottom
+ drawLine(x0,y0,x0,y0+height,1); // left
+ drawLine(x0+width,y0,x0+width,y0+height,1); // right
+ } else { // filled rectangle
+ int type = (fill==1) ? 1:0; // black or white fill
+ for (int y = y0; y<= y0+height; y++) { // loop through rows of rectangle
+ drawLine(x0,y,x0+width,y,type); // draw line across screen
+ }
+ }
+
+}