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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* i2stest.c
*
* Mon Sep 1 20:25:48 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Pedal2Metal.
*
* Pedal2Metal 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.
*
* Pedal2Metal 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 Pedal2Metal; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <wm8523.h>
#include <i2s.h>
#include <led.h>
//#include <LPC17xx.h>
#include <cli.h>
#include "../../src/sample.h"
unsigned int size = sizeof(samples) / sizeof(short);
#include "../test.h"
#if 0
void I2S_IRQHandler (void)
{
static int16_t cnt = 0;
for(int i = 0; i < 6; i++) {
//if(1 || (cnt % 24000) == 0) led_toggle();
i2s_write_pcm_16_stereo(cnt, cnt);
cnt++;
}
/*
uint32_t RxCount = 0;
if ( LPC_I2S->I2SSTATE & 0x01 )
{
RxCount = (LPC_I2S->I2SSTATE >> 8) & 0xFF;
if ( (RxCount != RXFIFO_EMPTY) && !I2SRXDone )
{
while ( RxCount > 0 )
{
if ( I2SReadLength == BUFSIZE )
{
LPC_I2S->I2SDAI |= ((0x01 << 3) | (0x01 << 4));
LPC_I2S->I2SIRQ &= ~(0x01 << 0); // Disable RX
I2SRXDone = 1;
break;
}
else
{
I2SRXBuffer[I2SReadLength++] = LPC_I2S->I2SRXFIFO;
}
RxCount--;
}
}
}
return;
*/
}
#endif
int main (void)
{
led_init();
cli_init();
/////////// WM8523
uint8_t portnum = 0;
wm8523_init(portnum, WM8523_FS_48K);
if(wm8523_get_chip_id(portnum) != WM8523_CHIP_ID) error();
wm8523_reset_registers(portnum);
wm8523_power_mode_t pwr = WM8523_PWR_POWER_UP_TO_UNMUTE;
wm8523_set_power_mode(portnum, pwr);
wm8523_aif_ctrl1_t ctl1;
ctl1.fmt = WM8523_FMT_I2S;
ctl1.wlen = WM8523_WLEN_16;
ctl1.invctl = WM8523_INVCTL_SLAVE_RISING;
ctl1.lrclkinvctl = WM8523_LRCLKINVCTL_SLAVE_NORMAL;
ctl1.modesel = WM8523_MODESEL_SLAVE;
ctl1.deemp = WM8523_DEEMPH_ENABLED;
wm8523_set_aif_ctrl1(portnum, ctl1);
wm8523_aif_ctrl2_t ctl2;
ctl2.clkratio = WM8523_CLKRATIO_AUTO;
ctl2.clkdiv = WM8523_CLKDIV_MCLK_4;
ctl2.mix = WM8523_MIX_STEREO;
wm8523_set_aif_ctrl2(portnum, ctl2);
wm8523_dac_ctrl3_t ctl3;
ctl3.downramp = WM8523_VOL_DOWN_INSTANT;
ctl3.upramp = WM8523_VOL_UP_INSTANT;
ctl3.lmute = WM8523_DACL_UNMUTE;
ctl3.rmute = WM8523_DACR_UNMUTE;
ctl3.dac_zc = WM8523_ZERO_CROSSING_DISABLED;
wm8523_set_dac_ctrl3(portnum, ctl3);
int res = i2s_clkcalc_init(48000, 16, 2);
/*
// From: tools/clkcalc 48000 16 2
int pclkdiv = 8;
int bitrate = 3;
int x = 57;
int y = 59;
// err = 16.949153 bits/second
int bitwidth = 16;
int channels = 2;
int res = i2s_init(pclkdiv, bitrate, x, y, bitwidth, channels);
*/
// if(res) error();
(void)res;
i2s_set_tx_mode_control(CLK_TX_SRC, 0, 1);
/*
//////// I2S
#if 1
// From: tools/clkcalc 48000 16 2
int pclkdiv = 8;
int bitrate = 1;
int x = 29;
int y = 59;
// err = 16.949153 bits/second
int bitwidth = 16;
int channels = 2;
int res = i2s_init(pclkdiv, bitrate, x, y, bitwidth, channels);
if(res) error();
// I2SInit();
i2s_set_tx_mode_control(CLK_TX_SRC, 0, 1);
// Set up IRQ
uint32_t *i2sirq = (uint32_t*)0x400A801C;
*i2sirq &= ~(0b1111 << 16); // Reset tx irq depth
int depth = 2;
*i2sirq |= ((depth & 0b1111) << 16); // Set tx irq depth
*i2sirq |= 0b1 << 1; // Enable TX IRQ, pg. 479 table 412
i2s_tx_start();
#else
// From: tools/clkcalc 48000 16 2
int pclkdiv = 8;
int bitrate = 1;
int x = 29;
int y = 59;
// err = 16.949153 bits/second
int bitwidth = 16;
int channels = 2;
int res = i2s_init(pclkdiv, bitrate, x, y, bitwidth, channels);
if(res) error();
// Set up IRQ
uint32_t *i2sirq = (uint32_t*)0x400A801C;
*i2sirq |= 0b1 << 0; // Enable IRQ, pg. 479 table 412
*i2sirq &= ~(0b1111 << 16); // Reset tx irq depth
int depth = 2;
*i2sirq |= ((depth & 0b1111) << 16); // Set tx irq depth
NVIC_EnableIRQ(I2S_IRQn); // I2S_IRQn = 27;
i2s_tx_reset_fifo();
i2s_tx_start();
#endif
*/
i2s_tx_start();
// int32_t *fifo = (int32_t*)0x400A8008;
unsigned int cnt = 0;
while(1) {
while(i2s_get_state_tx_level() > 7) {}
// i2s_write_pcm_16_stereo(cnt, cnt);
// *fifo = cnt;
// *fifo = (cnt / 40) | (cnt / 40) << 16;
if(cnt < size) {
i2s_write_pcm_16_stereo((samples[cnt] - 485) * 10,
(samples[cnt] - 485) * 10);
} else {
// repeat last sample
i2s_write_pcm_16_stereo(0, 0);
}
if(cnt > size * 30) cnt = 0;
// if(cnt > 64000) cnt = 0;
cnt++;
}
}
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