voicecontread2.c
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/*---------------------------------------------------------------------
Copyright (C) 1997,1998 Nintendo.
File miccontread2.c
Coded by Koji Mitsunari. Apr 22, 1998.
Modified by Koji Mitsunari. Jun 22, 1998.
Comments Voice Recognition Board
$Id: voicecontread2.c,v 1.1.1.1 2002/05/02 03:28:44 blythe Exp $
---------------------------------------------------------------------*/
/**************************************************************************
*
* $Revision: 1.1.1.1 $
* $Date: 2002/05/02 03:28:44 $
* $Source:
*
**************************************************************************/
#include "osint.h"
#include "controller.h"
#include "siint.h"
#define VOICE_DATA_SIZE 2
s32
__osVoiceContRead2(OSMesgQueue *mq, int channel, u16 address, u8 *buffer)
{
s32 ret = 0;
u8 status;
int i;
u8 *ptr;
int retry = 2;
/* Block to get resource token */
__osSiGetAccess();
do { /* Retry if ADRS/DATA CRC error */
ptr = (u8 *)(&__osPfsPifRam);
if (__osContLastCmd != CONT_VOICE_READ2
|| __osPfsLastChannel != channel) {
__osContLastCmd = CONT_VOICE_READ2;
__osPfsLastChannel = channel;
/* Set up request command format for all channels */
for (i = 0; i < channel; i++) *ptr++ = 0;
/* set format flag */
__osPfsPifRam.pifstatus = CONT_FORMAT;
/* Setup ram read format */
((__OSVoiceRead2Format *)ptr)->dummy = 0xff;
((__OSVoiceRead2Format *)ptr)->txsize = 3;
((__OSVoiceRead2Format *)ptr)->rxsize = VOICE_DATA_SIZE+1;
((__OSVoiceRead2Format *)ptr)->cmd = CONT_VOICE_READ2;
((__OSVoiceRead2Format *)ptr)->datacrc = 0xff;
/* setup ram read format */
ptr[sizeof(__OSVoiceRead2Format)] = FORMAT_END;
} else {
ptr += channel;
}
((__OSVoiceRead2Format *)ptr)->addrh = (u8)(address >>3);
((__OSVoiceRead2Format *)ptr)->addrl =
(u8)( (address << 5) | __osContAddressCrc(address)) ;
ret = __osSiRawStartDma(OS_WRITE, &__osPfsPifRam);
(void)osRecvMesg(mq, (OSMesg *)NULL, OS_MESG_BLOCK);
/* trigger pifmacro */
ret = __osSiRawStartDma(OS_READ, &__osPfsPifRam);
(void)osRecvMesg(mq, (OSMesg *)NULL, OS_MESG_BLOCK);
ret = (s32)((((__OSVoiceRead2Format *)ptr)->rxsize & CON_ERR_MASK) >> 4);
if (ret == 0) {
/* check data CRC */
if (__osVoiceContDataCrc(((__OSVoiceRead2Format *)ptr)->data,
VOICE_DATA_SIZE) !=
((__OSVoiceRead2Format *)ptr)->datacrc) {
/* reset status */
if ((ret = __osVoiceGetStatus(mq, channel, &status)) != 0){
break;
} else {
ret = CONT_ERR_CONTRFAIL;
}
} else {
bcopy(((__OSVoiceRead2Format *)ptr)->data, buffer, VOICE_DATA_SIZE);
}
} else {
ret = CONT_ERR_NO_CONTROLLER;
}
} while ((ret == CONT_ERR_CONTRFAIL) && (retry-- >= 0));
__osSiRelAccess();
return(ret);
}