Diff: apu.h

Revision:

0:5bd52e196edb

Child:

2:62e6e22f8be2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/apu.h	Mon Jan 09 13:54:39 2017 +0000
@@ -0,0 +1,74 @@
+/* hwapu - SPC music playback tools for real snes apu
+ * Copyright (C) 2004-2005  Raphael Assenat <raph@raphnet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#ifndef _apu_h__
+#define _apu_h__
+
+
+typedef struct {
+    unsigned char (*read)(int address);
+    void (*write)(int address, unsigned char data);
+    void (*reset)(void);
+    /* should return -1 if error and print an error message,
+     * return 0 on success. */
+    int (*init)(char *cmdline);
+    void (*shutdown)(void);
+} APU_ops;
+
+
+void apu_setOps(APU_ops *ops);
+
+unsigned char apu_read(int address);
+
+void apu_write(int address, unsigned char data);
+
+/* Write to address 'address', write the previously
+ * read value from port0 back to port 0 and wait
+ * for port0 value to be different from the written one.
+ */
+int apu_writeHandshake(int address, int data);
+
+/* Write many bytes using handshake (see apu_writeHandshake) */
+int apu_writeBytes(unsigned char *data, int len);
+
+/* reset the apu */
+void apu_reset(void);
+
+/* wait for a port to contain given value, with timeout */
+int apu_waitInport(int port, unsigned char data, int timeout_ms);
+
+/*
+ * Initialise an spc transfer at 'address'. 
+ * To be used after reset of after jumping to rom
+ *
+ * Use apu_newTransfer for additional transfers
+ * 
+ * return -1 on error, 0 if success
+ */
+int apu_initTransfer(unsigned short address);
+
+/* initialise a new transfer after the first transfer.
+ *
+ * returns 0 on success, -1 on error */
+int apu_newTransfer(unsigned short address);
+
+/* End transfer and jump to address
+ */
+void apu_endTransfer(unsigned short start_address);
+
+#endif // _apu_h__
+