From b0cd81cf66c0e5b5d0d662384752337f6c69cde5 Mon Sep 17 00:00:00 2001
From: Clyne Sullivan <tullivan99@gmail.com>
Date: Thu, 15 Feb 2018 08:35:35 -0500
Subject: [PATCH] better drawing, landscape

---
 include/display.h      |  4 ++--
 include/display_draw.h |  9 +++++++++
 initrd/init            | 15 ++++++++++++++-
 src/display.c          | 14 ++------------
 src/display_draw.c     | 23 +++++++++++++++++++++--
 src/main.c             | 25 ++++++++++---------------
 6 files changed, 58 insertions(+), 32 deletions(-)
 create mode 100644 include/display_draw.h

diff --git a/include/display.h b/include/display.h
index 1fab223..fb808c6 100644
--- a/include/display.h
+++ b/include/display.h
@@ -3,8 +3,8 @@
 
 #include <stdint.h>
 
-#define LCD_WIDTH  320
-#define LCD_HEIGHT 480
+#define LCD_WIDTH  480
+#define LCD_HEIGHT 320
 
 #define COLOR_MAX 31
 
diff --git a/include/display_draw.h b/include/display_draw.h
new file mode 100644
index 0000000..1030d45
--- /dev/null
+++ b/include/display_draw.h
@@ -0,0 +1,9 @@
+#ifndef DISPLAY_DRAW_H_
+#define DISPLAY_DRAW_H_
+
+void dsp_rect(int x, int y, int w, int h, uint16_t color);
+
+void dsp_cpos(int x, int y);
+void dsp_puts(const char *s);
+
+#endif // DISPLAY_DRAW_H_
diff --git a/initrd/init b/initrd/init
index bb04364..324e519 100644
--- a/initrd/init
+++ b/initrd/init
@@ -1,10 +1,23 @@
+func div9
+	if ((arg0 % 9) == 0)
+		ret 1
+	end
+	ret 0
+end
+
 set a 0
+set b 0
 do
 	set a (a + 1)
+	div9 a > b
+	if (b)
+		print a
+		print ", "
+	end
 	delay 1
 while (a < 100)
 
 if (a == 100)
-	print "All good!"
+	print " All good!"
 end
 
diff --git a/src/display.c b/src/display.c
index 9600ec0..8b62e6a 100644
--- a/src/display.c
+++ b/src/display.c
@@ -145,18 +145,10 @@ void dsp_init(void)
 	dsp_write_cmd(0xC5); // frame rate/inversion ctl
 	dsp_write_data(0x03);
 
-	// backlight
-	dsp_write_cmd(0x55);
-	dsp_write_data(0x01);
-	dsp_write_cmd(0x53);
-	dsp_write_data(0x2C);
-	dsp_write_cmd(0x51);
-	dsp_write_data(0x01);
-
 	dsp_write_cmd(0x36); // rot. and stuff
-	dsp_write_data(0x41);
+	dsp_write_data(0xA3);
 	dsp_write_cmd(0x3A); // set pixel format
-	dsp_write_data(0x65);
+	dsp_write_data(0x55);
 	dsp_write_cmd(0x11);
 	delay(150);
 	dsp_write_cmd(0x29); // set display on
@@ -171,7 +163,5 @@ void dsp_init(void)
 	dsp_write_cmd(0x37);
 	dsp_write_data(0x00);
 	dsp_write_data(0x00);*/
-
-	dsp_set_addr(0, 0, LCD_WIDTH, LCD_HEIGHT);
 }
 
diff --git a/src/display_draw.c b/src/display_draw.c
index 84a5443..f52cd8e 100644
--- a/src/display_draw.c
+++ b/src/display_draw.c
@@ -17,8 +17,11 @@ void dsp_putchar(int c)
 			dsp_write_data(inconsolata24[start + (i * 192 * 2) + j]);
 	}
 
-	if (++curx == 26)
-		curx = 0, cury++;
+	if (++curx == 40) {
+		curx = 0;
+		if (++cury == 10)
+			cury = 0;
+	}
 }
 
 void dsp_puts(const char *s)
@@ -27,3 +30,19 @@ void dsp_puts(const char *s)
 	while (s[i])
 		dsp_putchar(s[i++]);
 }
+
+void dsp_cpos(int x, int y)
+{
+	curx = x;
+	cury = y;
+}
+
+void dsp_rect(int x, int y, int w, int h, uint16_t color)
+{
+	dsp_set_addr(x, y, x + w - 1, y + h - 1);
+	int countdown = w * h;
+	do {
+		dsp_write_data(color >> 8);
+		dsp_write_data(color & 0xFF);
+	} while (countdown--);
+}
diff --git a/src/main.c b/src/main.c
index b91a975..bab8f02 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,6 +5,7 @@
 #include <gpio.h>
 #include <lcd.h>
 #include <display.h>
+#include <display_draw.h>
 #include <initrd.h>
 #include <serial.h>
 #include <parser.h>
@@ -43,8 +44,8 @@ int main(void)
 int script_puts(interpreter *it)
 {
 	char *s = igetarg_string(it, 0);
-	//lcd_puts(s);
-	asm("mov r0, %0; svc 2" :: "r" (s));
+	dsp_puts(s);
+	//asm("mov r0, %0; svc 2" :: "r" (s));
 	return 0;
 }
 
@@ -102,23 +103,17 @@ void kmain(void)
 	asm("cpsie i");
 
 	dsp_init();
-	//uint16_t c = 0x38;
-	uint16_t c = 0;
-	for (int i = 0; i < LCD_HEIGHT; i++) {
-		dsp_set_addr(0, i, LCD_WIDTH - 1, i);
-		int w = LCD_WIDTH - 1;
-		do {
-			dsp_write_data(c);//c >> 8);
-			dsp_write_data(c);//c & 0xFF);
-		} while (w--);
-	}
 
-	extern void dsp_puts(const char *);
-	dsp_puts("Hello, world! My name is Clyne.");
+	dsp_rect(0, 0, LCD_WIDTH, 105, dsp_color(0xFF, 0, 0));
+	dsp_rect(0, 105, LCD_WIDTH, 105, dsp_color(0, 0xFF, 0));
+	dsp_rect(0, 210, LCD_WIDTH, 110, dsp_color(0, 0, 0xFF));
+
+	//dsp_puts("Hello, world! My name is Clyne. I enjoy car rides and long 
+//walks on the beach");
 
 	//task_start(lcd_handler, 128);
 	//delay(200);
-	//task_start(task_interpreter, 4096);
+	task_start(task_interpreter, 4096);
 
 	//char *s = initrd_getfile("test.txt");