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@ -1,39 +1,60 @@ |
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/*
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MicroDexed |
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MicroDexed is a port of the Dexed sound engine |
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Dexed ist heavily based on https://github.com/google/music-synthesizer-for-android
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software Foundation, |
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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effect_delay_ext8 is a special delay class for APS6404L-3SQR based memory chips on
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a Teensy-4.1. The cod is a combination of the PJRC delay_ext class and suggestions |
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from https://forum.pjrc.com/threads/29276-Limits-of-delay-effect-in-audio-library/page5?highlight=APS6404L-3SQR
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*/ |
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/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com |
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* |
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* Development of this audio library was funded by PJRC.COM, LLC by sales of |
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop |
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* open source software by purchasing Teensy or other PJRC products. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice, development funding notice, and this permission |
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* notice shall be included in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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*/ |
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/* Added AUDIO_MEMORY_PSRAM_8MB
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* see https://forum.pjrc.com/threads/29276-Limits-of-delay-effect-in-audio-library/page5?highlight=APS6404L-3SQR
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* wirtz@parasitstudio.de |
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*/ |
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#include <Arduino.h> |
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#include "effect_delay_ext8.h" |
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//#define INTERNAL_TEST
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// While 20 MHz (Teensy actually uses 16 MHz in most cases) and even 24 MHz
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// have worked well in testing at room temperature with 3.3V power, to fully
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// meet all the worst case timing specs, the SPI clock low time would need
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// to be 40ns (12.5 MHz clock) for the single chip case and 51ns (9.8 MHz
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// clock) for the 6-chip memoryboard with 74LCX126 buffers.
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//
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// Timing analysis and info is here:
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// https://forum.pjrc.com/threads/29276-Limits-of-delay-effect-in-audio-library?p=97506&viewfull=1#post97506
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#define SPISETTING SPISettings(20000000, MSBFIRST, SPI_MODE0) |
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#define SPIRAM_MOSI_PIN 11 //-----------------
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#define SPIRAM_MISO_PIN 12 // for Teensy 4.1
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#define SPIRAM_SCK_PIN 13 //
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#define SPIRAM_CS_PIN 36 //-----------------
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// Use these with the audio adaptor board (should be adjustable by the user...)
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//#define SPIRAM_MOSI_PIN 7
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//#define SPIRAM_MISO_PIN 12
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//#define SPIRAM_SCK_PIN 14
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//#define SPIRAM_CS_PIN 6
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#define SPIRAM_MOSI_PIN 11 //-----------------
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#define SPIRAM_MISO_PIN 12 // for Teensy 4.1
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#define SPIRAM_SCK_PIN 13 //
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#define SPIRAM_CS_PIN 36 //-----------------
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//
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#define MEMBOARD_CS0_PIN 2 |
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#define MEMBOARD_CS1_PIN 3 |
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#define MEMBOARD_CS2_PIN 4 |
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@ -45,6 +66,11 @@ void AudioEffectDelayExternal8::update(void) |
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// grab incoming data and put it into the memory
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block = receiveReadOnly(); |
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if (memory_type >= AUDIO_MEMORY8_UNDEFINED) { |
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// ignore input and do nothing if undefined memory type
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release(block); |
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return; |
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} |
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if (block) { |
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if (head_offset + AUDIO_BLOCK_SAMPLES <= memory_length) { |
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// a single write is enough
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@ -97,75 +123,189 @@ void AudioEffectDelayExternal8::update(void) |
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} |
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} |
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uint32_t AudioEffectDelayExternal8::allocated = 0; |
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uint32_t AudioEffectDelayExternal8::allocated[2] = {0, 0}; |
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void AudioEffectDelayExternal8::initialize(uint32_t samples) |
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void AudioEffectDelayExternal8::initialize(AudioEffectDelayMemoryType8_t type, uint32_t samples) |
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{ |
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uint32_t memsize, avail; |
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activemask = 0; |
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head_offset = 0; |
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memory_type = type; |
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SPI.setMOSI(SPIRAM_MOSI_PIN); |
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SPI.setMISO(SPIRAM_MISO_PIN); |
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SPI.setSCK(SPIRAM_SCK_PIN); |
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SPI.setCS(SPIRAM_CS_PIN); // added for Teensy 4.1
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//
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SPI.begin();
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memsize = (2^23); // 8388608 bytes
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pinMode(SPIRAM_CS_PIN, OUTPUT); |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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avail = memsize - allocated; |
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if (type == AUDIO_MEMORY8_23LC1024) { |
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#ifdef INTERNAL_TEST |
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memsize = 8000; |
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#else |
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memsize = 65536; |
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#endif |
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pinMode(SPIRAM_CS_PIN, OUTPUT); |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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} else if (type == AUDIO_MEMORY8_MEMORYBOARD) { |
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memsize = 393216; |
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pinMode(MEMBOARD_CS0_PIN, OUTPUT); |
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pinMode(MEMBOARD_CS1_PIN, OUTPUT); |
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pinMode(MEMBOARD_CS2_PIN, OUTPUT); |
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digitalWriteFast(MEMBOARD_CS0_PIN, LOW); |
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digitalWriteFast(MEMBOARD_CS1_PIN, LOW); |
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digitalWriteFast(MEMBOARD_CS2_PIN, LOW);
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} else if (type == AUDIO_MEMORY8_CY15B104) { |
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#ifdef INTERNAL_TEST |
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memsize = 8000; |
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#else |
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memsize = 262144; |
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#endif |
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pinMode(SPIRAM_CS_PIN, OUTPUT); |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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} else if (type == AUDIO_MEMORY8_PSRAM_8MB) { |
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#ifdef INTERNAL_TEST |
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memsize = 8000; |
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#else |
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memsize = (2^23); // 8388608 bytes
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#endif |
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pinMode(SPIRAM_CS_PIN, OUTPUT); |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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} else { |
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return; |
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} |
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avail = memsize - allocated[type]; |
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if (avail < AUDIO_BLOCK_SAMPLES*2+1) { |
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memory_type = AUDIO_MEMORY8_UNDEFINED; |
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return; |
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} |
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if (samples > avail) samples = avail; |
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memory_begin = allocated; |
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allocated += samples; |
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memory_begin = allocated[type]; |
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allocated[type] += samples; |
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memory_length = samples; |
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zero(0, memory_length); |
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} |
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#ifdef INTERNAL_TEST |
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static int16_t testmem[8000]; // testing only
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#endif |
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void AudioEffectDelayExternal8::read(uint32_t offset, uint32_t count, int16_t *data) |
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{ |
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uint32_t addr = memory_begin + offset; |
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addr *= 2; |
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SPI.beginTransaction(SPISETTING); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer16((0x03 << 8) | (addr >> 16)); |
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SPI.transfer16(addr & 0xFFFF); |
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while (count) { |
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*data++ = (int16_t)(SPI.transfer16(0)); |
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count--; |
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#ifdef INTERNAL_TEST |
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while (count) { *data++ = testmem[addr++]; count--; } // testing only
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#else |
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if (memory_type == AUDIO_MEMORY8_23LC1024 ||
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memory_type == AUDIO_MEMORY8_CY15B104 || |
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memory_type == AUDIO_MEMORY8_PSRAM_8MB) |
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{ |
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addr *= 2; |
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SPI.beginTransaction(SPISETTING); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer16((0x03 << 8) | (addr >> 16)); |
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SPI.transfer16(addr & 0xFFFF); |
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while (count) { |
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*data++ = (int16_t)(SPI.transfer16(0)); |
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count--; |
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} |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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SPI.endTransaction(); |
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} else if (memory_type == AUDIO_MEMORY8_MEMORYBOARD) { |
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SPI.beginTransaction(SPISETTING); |
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while (count) { |
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uint32_t chip = (addr >> 16) + 1; |
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digitalWriteFast(MEMBOARD_CS0_PIN, chip & 1); |
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digitalWriteFast(MEMBOARD_CS1_PIN, chip & 2); |
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digitalWriteFast(MEMBOARD_CS2_PIN, chip & 4); |
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uint32_t chipaddr = (addr & 0xFFFF) << 1; |
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SPI.transfer16((0x03 << 8) | (chipaddr >> 16)); |
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SPI.transfer16(chipaddr & 0xFFFF); |
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uint32_t num = 0x10000 - (addr & 0xFFFF); |
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if (num > count) num = count; |
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count -= num; |
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addr += num; |
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do { |
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*data++ = (int16_t)(SPI.transfer16(0)); |
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} while (--num > 0); |
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} |
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digitalWriteFast(MEMBOARD_CS0_PIN, LOW); |
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digitalWriteFast(MEMBOARD_CS1_PIN, LOW); |
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digitalWriteFast(MEMBOARD_CS2_PIN, LOW); |
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SPI.endTransaction(); |
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} |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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SPI.endTransaction(); |
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#endif |
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} |
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void AudioEffectDelayExternal8::write(uint32_t offset, uint32_t count, const int16_t *data) |
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{ |
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uint32_t addr = memory_begin + offset; |
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addr *= 2; |
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SPI.beginTransaction(SPISETTING); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer(0x06); //write-enable before every write
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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asm volatile ("NOP\n NOP\n NOP\n NOP\n NOP\n NOP\n"); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer16((0x02 << 8) | (addr >> 16)); |
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SPI.transfer16(addr & 0xFFFF); |
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while (count) { |
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int16_t w = 0; |
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if (data) w = *data++; |
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SPI.transfer16(w); |
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count--; |
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#ifdef INTERNAL_TEST |
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while (count) { testmem[addr++] = *data++; count--; } // testing only
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#else |
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if (memory_type == AUDIO_MEMORY8_23LC1024 || |
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memory_type == AUDIO_MEMORY8_PSRAM_8MB ) { |
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addr *= 2; |
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SPI.beginTransaction(SPISETTING); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer16((0x02 << 8) | (addr >> 16)); |
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SPI.transfer16(addr & 0xFFFF); |
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while (count) { |
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int16_t w = 0; |
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if (data) w = *data++; |
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SPI.transfer16(w); |
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count--; |
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} |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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SPI.endTransaction(); |
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} else if (memory_type == AUDIO_MEMORY8_CY15B104) { |
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addr *= 2; |
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SPI.beginTransaction(SPISETTING); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer(0x06); //write-enable before every write
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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asm volatile ("NOP\n NOP\n NOP\n NOP\n NOP\n NOP\n"); |
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digitalWriteFast(SPIRAM_CS_PIN, LOW); |
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SPI.transfer16((0x02 << 8) | (addr >> 16)); |
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SPI.transfer16(addr & 0xFFFF); |
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while (count) { |
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int16_t w = 0; |
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if (data) w = *data++; |
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SPI.transfer16(w); |
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count--; |
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} |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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SPI.endTransaction();
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} else if (memory_type == AUDIO_MEMORY8_MEMORYBOARD) {
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SPI.beginTransaction(SPISETTING); |
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while (count) { |
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uint32_t chip = (addr >> 16) + 1; |
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digitalWriteFast(MEMBOARD_CS0_PIN, chip & 1); |
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digitalWriteFast(MEMBOARD_CS1_PIN, chip & 2); |
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digitalWriteFast(MEMBOARD_CS2_PIN, chip & 4); |
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uint32_t chipaddr = (addr & 0xFFFF) << 1; |
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SPI.transfer16((0x02 << 8) | (chipaddr >> 16)); |
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SPI.transfer16(chipaddr & 0xFFFF); |
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uint32_t num = 0x10000 - (addr & 0xFFFF); |
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if (num > count) num = count; |
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count -= num; |
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addr += num; |
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do { |
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int16_t w = 0; |
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if (data) w = *data++; |
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SPI.transfer16(w); |
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} while (--num > 0); |
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} |
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digitalWriteFast(MEMBOARD_CS0_PIN, LOW); |
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digitalWriteFast(MEMBOARD_CS1_PIN, LOW); |
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digitalWriteFast(MEMBOARD_CS2_PIN, LOW); |
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SPI.endTransaction(); |
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} |
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digitalWriteFast(SPIRAM_CS_PIN, HIGH); |
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SPI.endTransaction();
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#endif |
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} |
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