From 74a904be54d357d6010cb24d9d1d69d488a558b1 Mon Sep 17 00:00:00 2001
From: Fabrizio Caruso <fabrizio_caruso@hotmail.com>
Date: Thu, 3 Oct 2019 22:46:34 +0200
Subject: [PATCH 048/170] Hello world example for the Supervision

---
 samples/supervisionhello.c | 72 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100755 samples/supervisionhello.c

diff --git a/samples/supervisionhello.c b/samples/supervisionhello.c
new file mode 100755
index 00000000..9b09a773
--- /dev/null
+++ b/samples/supervisionhello.c
@@ -0,0 +1,72 @@
+#include <supervision.h>
+#include <peekpoke.h>
+
+#define SV_OFFSET 0x0A
+#define SV_INIT_POSITION (SV_VIDEO+0x0A*48+0x0A)
+
+unsigned char h_char[] = {0x66,0x66,0x66,0x7e,0x66,0x66,0x66,0x00};
+unsigned char e_char[] = {0x7e,0x60,0x60,0x78,0x60,0x60,0x7e,0x00};
+unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7e,0x00};
+unsigned char o_char[] = {0x3c,0x66,0x66,0x66,0x66,0x66,0x3c,0x00};
+unsigned char w_char[] = {0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00};
+unsigned char r_char[] = {0x7c,0x66,0x66,0x7c,0x78,0x6c,0x66,0x00};
+unsigned char d_char[] = {0x78,0x6c,0x66,0x66,0x66,0x6c,0x78,0x00};
+
+
+void clear_screen(void)
+{
+    unsigned short i;
+    
+    for(i=0;i<0x2000;++i)
+    {
+        POKE(SV_VIDEO+i,0);
+    }
+}
+
+unsigned char bit_reverse_lookup[16] = 
+{
+    0x0, 0x8, 0x4, 0xC, 0x2, 0xA, 0x6, 0xE,
+    0x1, 0x9, 0x5, 0xD, 0x3, 0xB, 0x7, 0xF 
+};
+
+unsigned char bit_reverse(unsigned char n) 
+{
+    return (bit_reverse_lookup[n&0b1111] << 4) | bit_reverse_lookup[n>>4];
+}
+
+void init_screen(void)
+{
+    SV_LCD.height = 0xA0;
+    SV_LCD.width = 0xA0;
+    SV_BANK = 0xC9;     
+}
+
+int main()
+{
+    unsigned char i;
+    
+    init_screen();
+    
+    clear_screen();
+    
+    for(i=0;i<8;++i)
+    {
+        POKE(SV_INIT_POSITION+1 +i*48,bit_reverse(h_char[i]));
+        POKE(SV_INIT_POSITION+2 +i*48,bit_reverse(e_char[i]));
+        POKE(SV_INIT_POSITION+3 +i*48,bit_reverse(l_char[i]));
+        POKE(SV_INIT_POSITION+4 +i*48,bit_reverse(l_char[i]));
+        POKE(SV_INIT_POSITION+5 +i*48,bit_reverse(o_char[i]));
+        
+        POKE(SV_INIT_POSITION+7 +i*48,bit_reverse(w_char[i]));
+        POKE(SV_INIT_POSITION+8 +i*48,bit_reverse(o_char[i]));
+        POKE(SV_INIT_POSITION+9 +i*48,bit_reverse(r_char[i]));
+        POKE(SV_INIT_POSITION+10+i*48,bit_reverse(l_char[i]));
+        POKE(SV_INIT_POSITION+11+i*48,bit_reverse(d_char[i]));        
+    }
+
+    while(1) {};
+    
+    return 0;
+}
+
+
-- 
2.26.0