X-Git-Url: https://hackdaworld.org/gitweb/?a=blobdiff_plain;f=betty%2Fdisplay.c;h=2da19efe9ffa8f4ba42d32bd89c5339c369cfa13;hb=96c6e10b97b3cce49a3c2090108ea29d23ec3950;hp=a5db3385ecf6e93dffcb606c0bfa2dd4688781a3;hpb=b4ca71fc214ba3c58cec25661ba1f81cf7b1b871;p=my-code%2Farm.git

diff --git a/betty/display.c b/betty/display.c
index a5db338..2da19ef 100644
--- a/betty/display.c
+++ b/betty/display.c
@@ -5,19 +5,160 @@
  *
  */
 
+/*
+ * some comments on alpha blending!
+ *
+ * ...
+ *
+ */
+
 #include "display.h"
+#include "system.h"
+#include "default_logo.h"
+#include "uart.h"
 
 /*
  * functions
  */
 
-void bl_init(void) {
+void display_fill_screen(u8 fill) {
+
+	u8 page,width;
+	u8 buf[2];
+
+	buf[0]=0;
+	buf[1]=0;
+
+	switch(fill) {
+		case DISPLAY_FILL_LG:
+			buf[1]=0xff;
+			break;
+		case DISPLAY_FILL_DG:
+			buf[0]=0xff;
+			break;
+		case DISPLAY_FILL_B:
+			buf[0]=0xff;
+			buf[1]=0xff;
+			break;
+		case DISPLAY_FILL_W:
+		default:
+			break;
+	}
+
+	for(page=0;page<DISPLAY_PAGE_MAX;page++) {
+		DISPLAY_SET_C_ADDR(0);
+		DISPLAY_SET_PAGE_ADDR(page);
+		for(width=0;width<DISPLAY_DIMX;width++) {
+			DISPLAY_DATA=buf[0];
+			DISPLAY_DATA=buf[1];
+		}
+	}
+}
+
+void display_clear_screen(void) {
+
+	display_fill_screen(DISPLAY_FILL_W);
+}
+
+void display_init(void) {
+
+	/* oscillator, regulator, boost, opamp, contrast */
+	DISPLAY_START_OSCILLATOR;
+	DISPLAY_SET_REGULATOR(7);
+	DISPLAY_SET_CONTRAST(0x38);
+	DISPLAY_SET_CONV_FACTOR(0x01);
+	DISPLAY_SET_POWER(DISPLAY_V_BOOST|DISPLAY_REGULATOR|DISPLAY_OPAMP);
+
+	// gray scale palette
+	DISPLAY_SET_WHITE(0,0,0,0);
+	DISPLAY_SET_LGRAY(5,5,5,5);	// obviously 3, but it's too bright!
+	DISPLAY_SET_DGRAY(7,7,7,7);	// obviously 6, but again too bright!
+	DISPLAY_SET_BLACK(9,9,9,9);
+
+	/* normal mode, display depending ram content */
+	DISPLAY_RAM_CONTENTS_ON;
+	display_clear_screen();
+	DISPLAY_NORMAL;			// 00 -> white, 11 -> black
+	DISPLAY_SET_COM_ODIR_REMAPPED;	// start counting at the top
+
+	/* switch on the display */
+	DISPLAY_SET_ON;
+}
+
+void display_load_logo(u8 *src) {
+
+	u8 *s;
+	u8 page,width;
+
+	s=src;
+	if(s==0)
+		s=default_logo;
+
+	for(page=0;page<DISPLAY_PAGE_MAX;page++) {
+		DISPLAY_SET_C_ADDR(0);
+		DISPLAY_SET_PAGE_ADDR(page);
+		for(width=0;width<DISPLAY_DIMX;width++) {
+			DISPLAY_DATA=*s++;
+			DISPLAY_DATA=*s++;
+		}
+	}
+}
+
+void display_draw_rectangle(int x,int y,int w,int h,u8 fill,u8 alpha) {
+
+	int c,r,rmax;
+	u8 p,spage,epage;
+	u8 b[2],a[2];		// c = a over b => c=alpha*a+(1-alpha)*b
+
+	a[0]=0;
+	a[1]=0;
+	switch(fill) {
+		case DISPLAY_FILL_LG:
+			a[1]=1;
+			break;
+		case DISPLAY_FILL_DG:
+			a[0]=1;
+			break;
+		case DISPLAY_FILL_B:
+			a[0]=1;
+			a[1]=1;
+		case DISPLAY_FILL_W:
+		default:
+			break;
+	}
+
+	spage=y>>3;					// start page = y/8
+	epage=(y+h)>>3;					// end page (y+h)/8
+
+	for(p=spage;p<=epage;p++) {
+		DISPLAY_SET_PAGE_ADDR(p);
+		for(c=x;c<x+w;c++) {
+			DISPLAY_SET_C_ADDR(c);
+			b[0]=DISPLAY_DATA;		// dummy read (p.16)
+			b[0]=DISPLAY_DATA;
+			b[1]=DISPLAY_DATA;
+			rmax=y+8>y+h?y+h:y+8;
+			for(r=y;r<rmax;r++) {
+				b[0]&=~(1<<r);
+				b[1]&=~(1<<r);
+				b[0]|=a[0]<<r;
+				b[1]|=a[1]<<r;
+			}
+			DISPLAY_SET_C_ADDR(c);
+			DISPLAY_DATA=b[0];
+			DISPLAY_DATA=b[1];
+		}
+		y+=8;
+	}
+}
+
+void display_bl_init(void) {
 
-	PINSEL0&=~(1<<9|(1<<8));
 	IODIR0|=(1<<4);
+	IOSET0=(1<<4);	// off by default
 }
 
-void bl_toggle(void) {
+void display_bl_toggle(void) {
 
 	if(IOPIN0&(1<<4))
 		IOCLR0=(1<<4);
@@ -25,12 +166,12 @@ void bl_toggle(void) {
 		IOSET0=(1<<4);
 }
 
-void bl_on(void) {
+void display_bl_on(void) {
 
 	IOCLR0=(1<<4);
 }
 
-void bl_off(void) {
+void display_bl_off(void) {
 
 	IOSET0=(1<<4);
 }