Mercurial > spc_convert
view demo/comm.c @ 3:95cdedd01422
allow user to select number of seconds to convert
author | Robert McIntyre <rlm@mit.edu> |
---|---|
date | Fri, 21 Oct 2011 06:44:35 -0700 |
parents | e38dacceb958 |
children |
line wrap: on
line source
1 /* Communicates with SPC the way the SNES would.3 Note: You'll need an "spc_rom.h" file that contains the 64-byte IPL ROM contents */5 #include "snes_spc/spc.h"7 #include "demo_util.h"8 #include <string.h>9 #include <stdio.h>11 static SNES_SPC* snes_spc;13 /* Make port access more convenient. Fakes time by simply incrementing it each call. */14 static spc_time_t stime;15 static int pread ( int port ) { return spc_read_port( snes_spc, stime++, port ); }16 static void pwrite( int port, int data ) { spc_write_port( snes_spc, stime++, port, data ); }18 static unsigned char const spc_rom [spc_rom_size] = {19 /* ROM data not provided with emulator */20 #include "spc_rom.h"21 };23 int main()24 {25 int i;27 /* Data to upload */28 static unsigned char const data [4] = "\xFA\xDE\xD1";29 unsigned const data_addr = 0xF5; /* second I/O port */31 snes_spc = spc_new();32 if ( !snes_spc ) error( "Out of memory" );33 spc_init_rom( snes_spc, spc_rom );34 spc_reset( snes_spc );36 /* Simulate reads and writes that SNES code would do */38 /* Wait for SPC to be ready */39 while ( pread( 0 ) != 0xAA || pread( 1 ) != 0xBB ) { }41 /* Start address */42 pwrite( 2, data_addr & 0xFF );43 pwrite( 3, data_addr >> 8 );45 /* Tell SPC to start transfer and wait for acknowledgement */46 pwrite( 0, 0xCC );47 pwrite( 1, 0x01 );48 while ( pread( 0 ) != 0xCC ) { }50 /* Send each byte and wait for acknowledgement */51 for ( i = 0; i < 4; i++ )52 {53 printf( "%02X ", data [i] );54 pwrite( 1, data [i] );55 pwrite( 0, i );56 while ( pread( 0 ) != i ) { }57 }58 printf( "\n" );60 /* Verify that data was transferred properly */61 for ( i = 0; i < 3; i++ )62 printf( "%02X ", pread( i + 1 ) );63 printf( "\n" );65 printf( "Cycles: %ld\n", (long) stime );67 spc_delete( snes_spc );69 return 0;70 }