rlm@0: /* Communicates with SPC the way the SNES would.
rlm@0: 
rlm@0: Note: You'll need an "spc_rom.h" file that contains the 64-byte IPL ROM contents */
rlm@0: 
rlm@0: #include "snes_spc/spc.h"
rlm@0: 
rlm@0: #include "demo_util.h"
rlm@0: #include <string.h>
rlm@0: #include <stdio.h>
rlm@0: 
rlm@0: static SNES_SPC* snes_spc;
rlm@0: 
rlm@0: /* Make port access more convenient. Fakes time by simply incrementing it each call. */
rlm@0: static spc_time_t stime;
rlm@0: static int  pread ( int port )           { return spc_read_port( snes_spc, stime++, port ); }
rlm@0: static void pwrite( int port, int data ) { spc_write_port( snes_spc, stime++, port, data ); }
rlm@0: 
rlm@0: static unsigned char const spc_rom [spc_rom_size] = {
rlm@0: 	/* ROM data not provided with emulator */
rlm@0: 	#include "spc_rom.h"
rlm@0: };
rlm@0: 
rlm@0: int main()
rlm@0: {
rlm@0: 	int i;
rlm@0: 	
rlm@0: 	/* Data to upload */
rlm@0: 	static unsigned char const data [4] = "\xFA\xDE\xD1";
rlm@0: 	unsigned const data_addr = 0xF5; /* second I/O port */
rlm@0: 	
rlm@0: 	snes_spc = spc_new();
rlm@0: 	if ( !snes_spc ) error( "Out of memory" );
rlm@0: 	spc_init_rom( snes_spc, spc_rom );
rlm@0: 	spc_reset( snes_spc );
rlm@0: 	
rlm@0: 	/* Simulate reads and writes that SNES code would do */
rlm@0: 	
rlm@0: 	/* Wait for SPC to be ready */
rlm@0: 	while ( pread( 0 ) != 0xAA || pread( 1 ) != 0xBB ) { }
rlm@0: 	
rlm@0: 	/* Start address */
rlm@0: 	pwrite( 2, data_addr & 0xFF );
rlm@0: 	pwrite( 3, data_addr >> 8 );
rlm@0: 	
rlm@0: 	/* Tell SPC to start transfer and wait for acknowledgement */
rlm@0: 	pwrite( 0, 0xCC );
rlm@0: 	pwrite( 1, 0x01 );
rlm@0: 	while ( pread( 0 ) != 0xCC ) { }
rlm@0: 	
rlm@0: 	/* Send each byte and wait for acknowledgement */
rlm@0: 	for ( i = 0; i < 4; i++ )
rlm@0: 	{
rlm@0: 		printf( "%02X ", data [i] );
rlm@0: 		pwrite( 1, data [i] );
rlm@0: 		pwrite( 0, i );
rlm@0: 		while ( pread( 0 ) != i ) { }
rlm@0: 	}
rlm@0: 	printf( "\n" );
rlm@0: 	
rlm@0: 	/* Verify that data was transferred properly */
rlm@0: 	for ( i = 0; i < 3; i++ )
rlm@0: 		printf( "%02X ", pread( i + 1 ) );
rlm@0: 	printf( "\n" );
rlm@0: 	
rlm@0: 	printf( "Cycles: %ld\n", (long) stime );
rlm@0: 	
rlm@0: 	spc_delete( snes_spc );
rlm@0: 	
rlm@0: 	return 0;
rlm@0: }