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Simplified the Supervision "hello world" sample program.

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Greg King
2021-05-29 09:04:47 -04:00
parent c0f29993e0
commit ee5014c595
1 changed files with 69 additions and 65 deletions
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134
samples/supervisionhello.c
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@@ -3,89 +3,93 @@
/* Watara Supervision sample C program */ /* Watara Supervision sample C program */
/* */ /* */
/* Fabrizio Caruso (fabrizio_caruso@hotmail.com), 2019 */ /* Fabrizio Caruso (fabrizio_caruso@hotmail.com), 2019 */
/* Greg King (greg.king5@verizon.net), 2021 */
/* */ /* */
/*****************************************************************************/ /*****************************************************************************/
#include <supervision.h> #include <supervision.h>
#include <peekpoke.h> #include <string.h>
// Number of bytes per screen line (Remark: Last 8 bytes are not displayed) /* Number of words per screen line (Remark: Last 4 words aren't displayed) */
#define BYTES_PER_LINE 48 #define WORDS_PER_LINE (160/8+4)
// Character definitions in 8x8 format struct sv_vram {
const unsigned char h_char[] = {0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00}; unsigned int v[160/8][8][WORDS_PER_LINE];
const unsigned char e_char[] = {0x7E,0x60,0x60,0x78,0x60,0x60,0x7E,0x00}; };
const unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7E,0x00}; #define SV_VRAM ((*(struct sv_vram *)0x4000).v)
const unsigned char o_char[] = {0x3C,0x66,0x66,0x66,0x66,0x66,0x3C,0x00};
const unsigned char w_char[] = {0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00};
const unsigned char r_char[] = {0x7C,0x66,0x66,0x7C,0x78,0x6C,0x66,0x00};
const unsigned char d_char[] = {0x78,0x6C,0x66,0x66,0x66,0x6C,0x78,0x00};
void clear_screen(void) /* Character definitions in 8x8 format */
/* That format gives us a screen of 20 columns and 20 rows */
static const unsigned char h_char[] = {0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00};
static const unsigned char e_char[] = {0x7E,0x60,0x60,0x78,0x60,0x60,0x7E,0x00};
static const unsigned char l_char[] = {0x60,0x60,0x60,0x60,0x60,0x60,0x7E,0x00};
static const unsigned char o_char[] = {0x3C,0x66,0x66,0x66,0x66,0x66,0x3C,0x00};
static const unsigned char w_char[] = {0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00};
static const unsigned char r_char[] = {0x7C,0x66,0x66,0x7C,0x78,0x6C,0x66,0x00};
static const unsigned char d_char[] = {0x78,0x6C,0x66,0x66,0x66,0x6C,0x78,0x00};
static void clear_screen(void)
{ {
unsigned short i; memset(SV_VIDEO, 0, 0x2000);
}
for(i=0;i<0x2000;++i)
/* Necessary conversion to have 2 bits per pixel with darkest hue */
/* Remark: The Supervision uses 2 bits per pixel, and bits are mapped into pixels in reversed order */
static unsigned int __fastcall__ double_reversed_bits(unsigned char)
{
__asm__("stz ptr2");
__asm__("stz ptr2+1");
__asm__("ldy #$08");
L1: __asm__("lsr a");
__asm__("php");
__asm__("rol ptr2");
__asm__("rol ptr2+1");
__asm__("plp");
__asm__("rol ptr2");
__asm__("rol ptr2+1");
__asm__("dey");
__asm__("bne %g", L1);
__asm__("lda ptr2");
__asm__("ldx ptr2+1");
return __AX__;
}
static void display_char(const unsigned char x, const unsigned char y, const unsigned char *ch)
{
unsigned char k;
for(k=0;k<8;++k)
{ {
POKE(SV_VIDEO+i,0); SV_VRAM[y][k][x] = double_reversed_bits(ch[k]);
} }
} }
// Necessary conversion to have 2 bits per pixel with darkest hue static void init_lcd(void)
// Remark: The Supervision uses 2 bits per pixel and bits are mapped into pixel in reversed order
unsigned char reversed_map_one_to_two_lookup[16] =
{
0x00, 0xC0, 0x30, 0xF0, 0x0C, 0xCC, 0x3C, 0xFC,
0x03, 0xC3, 0x33, 0xF3, 0x0F, 0xCF, 0x3F, 0xFF
};
unsigned char left_map_one_to_two(unsigned char n)
{
return reversed_map_one_to_two_lookup[n >> 4];
}
unsigned char right_map_one_to_two(unsigned char n)
{
return reversed_map_one_to_two_lookup[n&0x0F];
}
void display_char(const unsigned char x, const unsigned char y, const unsigned char *ch)
{
unsigned char k;
for(k=0;k<8;++k)
{ \
SV_VIDEO[2*(y)+BYTES_PER_LINE*k+BYTES_PER_LINE*(x<<3)] = left_map_one_to_two(ch[k]);
SV_VIDEO[2*(y)+BYTES_PER_LINE*k+BYTES_PER_LINE*(x<<3)+1] = right_map_one_to_two(ch[k]);
}
}
void init_lcd(void)
{ {
SV_LCD.width = 160; SV_LCD.width = 160;
SV_LCD.height = 160; SV_LCD.height = 160;
} }
int main() static void hello(unsigned char x, unsigned char y)
{ {
init_lcd(); display_char(x+ 0,y,h_char);
clear_screen(); display_char(x+ 1,y,e_char);
display_char(x+ 2,y,l_char);
display_char(3,2, h_char); display_char(x+ 3,y,l_char);
display_char(3,3, e_char); display_char(x+ 4,y,o_char);
display_char(3,4, l_char);
display_char(3,5, l_char);
display_char(3,6, o_char);
display_char(3,8, w_char);
display_char(3,9, o_char);
display_char(3,10,r_char);
display_char(3,11,l_char);
display_char(3,12,d_char);
while(1) {}; display_char(x+ 6,y,w_char);
display_char(x+ 7,y,o_char);
return 0; display_char(x+ 8,y,r_char);
display_char(x+ 9,y,l_char);
display_char(x+10,y,d_char);
} }
void main(void)
{
init_lcd();
clear_screen();
hello(2,3);
hello(7,16);
}