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Improve helloworld example for Supervision
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@ -1,17 +1,15 @@
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#include <supervision.h>
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#include <peekpoke.h>
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#define SV_OFFSET 0x0A
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#define SV_INIT_POSITION (SV_VIDEO+0x0A*48+0x0A)
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unsigned char h_char[] = {0x66,0x66,0x66,0x7e,0x66,0x66,0x66,0x00};
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unsigned char e_char[] = {0x7e,0x60,0x60,0x78,0x60,0x60,0x7e,0x00};
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unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7e,0x00};
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unsigned char o_char[] = {0x3c,0x66,0x66,0x66,0x66,0x66,0x3c,0x00};
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unsigned char w_char[] = {0x63,0x63,0x63,0x6b,0x7f,0x77,0x63,0x00};
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unsigned char r_char[] = {0x7c,0x66,0x66,0x7c,0x78,0x6c,0x66,0x00};
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unsigned char d_char[] = {0x78,0x6c,0x66,0x66,0x66,0x6c,0x78,0x00};
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#define BYTES_PER_LINE 48
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const unsigned char h_char[] = {0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00};
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const unsigned char e_char[] = {0x7E,0x60,0x60,0x78,0x60,0x60,0x7E,0x00};
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const unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7E,0x00};
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const unsigned char o_char[] = {0x3C,0x66,0x66,0x66,0x66,0x66,0x3C,0x00};
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const unsigned char w_char[] = {0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00};
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const unsigned char r_char[] = {0x7C,0x66,0x66,0x7C,0x78,0x6C,0x66,0x00};
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const unsigned char d_char[] = {0x78,0x6C,0x66,0x66,0x66,0x6C,0x78,0x00};
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void clear_screen(void)
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{
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@ -23,37 +21,48 @@ void clear_screen(void)
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}
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}
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unsigned char bit_reverse_lookup[16] =
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unsigned char reversed_map_one_to_two_lookup[16] =
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{
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0x0, 0x8, 0x4, 0xC, 0x2, 0xA, 0x6, 0xE,
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0x1, 0x9, 0x5, 0xD, 0x3, 0xB, 0x7, 0xF
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0x00, 0xC0, 0x30, 0xF0, 0x0C, 0xCC, 0x3C, 0xFC,
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0x03, 0xC3, 0x33, 0xF3, 0x0F, 0xCF, 0x3F, 0xFF
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};
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unsigned char bit_reverse(unsigned char n)
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unsigned char left_map_one_to_two(unsigned char n)
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{
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return (bit_reverse_lookup[n&0b1111] << 4) | bit_reverse_lookup[n>>4];
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return reversed_map_one_to_two_lookup[n >> 4];
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}
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unsigned char right_map_one_to_two(unsigned char n)
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{
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return reversed_map_one_to_two_lookup[n&0x0F];
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}
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void display_char(const unsigned char x, const unsigned char y, const unsigned char *ch)
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{
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unsigned char k;
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for(k=0;k<8;++k)
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{ \
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SV_VIDEO[2*(y)+BYTES_PER_LINE*k+BYTES_PER_LINE*(x<<3)] = left_map_one_to_two(ch[k]);
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SV_VIDEO[2*(y)+BYTES_PER_LINE*k+BYTES_PER_LINE*(x<<3)+1] = right_map_one_to_two(ch[k]);
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}
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}
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int main()
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{
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unsigned char i;
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{
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clear_screen();
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for(i=0;i<8;++i)
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{
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POKE(SV_INIT_POSITION+1 +i*48,bit_reverse(h_char[i]));
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POKE(SV_INIT_POSITION+2 +i*48,bit_reverse(e_char[i]));
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POKE(SV_INIT_POSITION+3 +i*48,bit_reverse(l_char[i]));
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POKE(SV_INIT_POSITION+4 +i*48,bit_reverse(l_char[i]));
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POKE(SV_INIT_POSITION+5 +i*48,bit_reverse(o_char[i]));
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POKE(SV_INIT_POSITION+7 +i*48,bit_reverse(w_char[i]));
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POKE(SV_INIT_POSITION+8 +i*48,bit_reverse(o_char[i]));
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POKE(SV_INIT_POSITION+9 +i*48,bit_reverse(r_char[i]));
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POKE(SV_INIT_POSITION+10+i*48,bit_reverse(l_char[i]));
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POKE(SV_INIT_POSITION+11+i*48,bit_reverse(d_char[i]));
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}
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display_char(3,2, h_char);
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display_char(3,3, e_char);
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display_char(3,4, l_char);
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display_char(3,5, l_char);
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display_char(3,6, o_char);
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display_char(3,8, w_char);
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display_char(3,9, o_char);
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display_char(3,10,r_char);
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display_char(3,11,l_char);
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display_char(3,12,d_char);
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while(1) {};
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