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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Catalin Patulea
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "registers.h"
#include "arm.h"
#include "ipc.h"
#include "dma.h"
#include "audio.h"
void main(void) {
TCR = 1 << 4; /* Stop the timer. */
IMR = 0xffff; /* Unmask all interrupts. */
IFR = IFR; /* Clear all pending interrupts. */
PMST |= 1 << 2; /* Turn CLOCKOUT off to save power */
asm(" rsbx INTM"); /* Globally enable interrupts. */
audiohw_init();
dma_init();
#if defined(HAVE_DEBUG)
debugf("DSP inited...");
#endif
for (;;) {
asm(" IDLE 1");
asm(" NOP");
}
}
/* Obsoleted/testing snippets: */
#ifdef DATA_32_SINE
for (i = 0; i < 32; i++) {
double ratio = ((double)i)/32.0;
double rad = 3.0*3.141592*ratio;
double normal = sin(rad);
double scaled = 32767.0*(normal);
data[2*i + 0] = -(signed short)scaled;
data[2*i + 1] = (signed short)scaled;
}
#endif
#ifdef MANUAL_TRANSFER
register signed short *p;
debugf("starting write");
i = 0;
p = data;
SPSA0 = 0x01;
for (;;) {
while ((SPSD0 & (1 << 1)) == 0);
DXR20 = *p++; // left channel
DXR10 = *p++; // right channel
if (++i == 32) {
p = data;
i = 0;
}
}
#endif
#ifdef INIT_MSG
/* Copy codec init data (before debugf, which clobbers status). */
if (status.msg != MSG_INIT) {
debugf("No init message (%04x: %04x %04x %04x %04x instead)",
(unsigned short)&status,
((unsigned short *)&status)[0],
((unsigned short *)&status)[1],
((unsigned short *)&status)[2],
((unsigned short *)&status)[3]);
return;
}
memcpy(&init, (void *)&status.payload.init, sizeof(init));
#endif
#ifdef IPC_SIZES
debugf("sizeof(ipc_message)=%uw offset(ipc_message.payload)=%uw",
sizeof(struct ipc_message), (int)&((struct ipc_message*)0)->payload);
#endif
#ifdef VERBOSE_INIT
debugf("codec started with PCM at SDRAM offset %04x:%04x",
sdem_addrh, sdem_addrl);
#endif
#ifdef SPIKE_DATA
for (i = 0; i < 0x2000; i++) {
data[2*i ] = data[2*i+1] = ((i % 32) == 0) * 32767;
}
#endif
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