98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
#include "aica/aica.hpp"
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extern volatile uint32_t dram[0x200000] __asm("dram");
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constexpr uint32_t sectors_per_chunk = 16;
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constexpr uint32_t chunk_size = 2048 * sectors_per_chunk;
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__attribute__((section(".buffers.chunk")))
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static uint32_t chunk[2][chunk_size / 4];
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void request_chunk()
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{
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constexpr uint32_t mcipd__sh4_interrupt = (1 << 5);
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aica_sound.common.mcipd = mcipd__sh4_interrupt;
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}
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void wait_sh4_response()
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{
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constexpr uint32_t scipd__arm_interrupt = (1 << 5);
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while ((aica_sound.common.SCIPD() & scipd__arm_interrupt) == 0) {
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}
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aica_sound.common.scire = scipd__arm_interrupt;
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}
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extern "C"
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void main()
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{
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volatile uint32_t * slot = reinterpret_cast<volatile uint32_t*>(0x00800000);
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for (uint32_t i = 0; i < (sizeof (struct aica_channel)) * 64 / 4; i++) {
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slot[i] = 0;
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}
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volatile uint32_t * dsp = reinterpret_cast<volatile uint32_t*>(0x00803000);
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for (int i = 0; i < 0xb00 / 4; i++) {
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dsp[i] = 0;
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}
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aica_sound.channel[0].KYONB(1);
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aica_sound.channel[0].LPCTL(1);
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aica_sound.channel[0].PCMS(0);
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aica_sound.channel[0].LSA(0);
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aica_sound.channel[0].LEA((chunk_size / 2) * 2 - 1);
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aica_sound.channel[0].D2R(0x0);
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aica_sound.channel[0].D1R(0x0);
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aica_sound.channel[0].RR(0x1f);
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aica_sound.channel[0].AR(0x1f);
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aica_sound.channel[0].OCT(0);
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aica_sound.channel[0].FNS(0x0);
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aica_sound.channel[0].DISDL(0xf);
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aica_sound.channel[0].DIPAN(0x0);
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aica_sound.channel[0].Q(0b00100);
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aica_sound.channel[0].TL(0);
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aica_sound.channel[0].LPOFF(0);
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aica_sound.channel[0].FLV0(0x1ff8);
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aica_sound.channel[0].FLV1(0x1ff8);
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aica_sound.channel[0].FLV2(0x1ff8);
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aica_sound.channel[0].FLV3(0x1ff8);
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aica_sound.channel[0].FLV4(0x1ff8);
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aica_sound.common.mono_mem8mb_dac18b_ver_mvol =
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aica::mono_mem8mb_dac18b_ver_mvol::MONO(0) // enable panpots
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| aica::mono_mem8mb_dac18b_ver_mvol::MEM8MB(0) // 16Mbit SDRAM
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| aica::mono_mem8mb_dac18b_ver_mvol::DAC18B(0) // 16-bit DAC
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| aica::mono_mem8mb_dac18b_ver_mvol::MVOL(0xf) // 15/15 volume
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;
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//constexpr uint32_t tactl = 6; // increment once every 1 samples
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//constexpr uint32_t tima = 0; // interrupt after 128 samples
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dram[0] = reinterpret_cast<uint32_t>(&chunk[0][0]);
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dram[1] = reinterpret_cast<uint32_t>(&chunk[1][0]);
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aica_sound.channel[0].SA(reinterpret_cast<const uint32_t>(&chunk[0][0]));
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int started = 0;
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while (1) {
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// detect buffer underrun
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uint32_t sample = 0;
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constexpr uint32_t samples_per_sample = 1;
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constexpr uint32_t target = chunk_size / 2 * samples_per_sample;
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constexpr uint32_t scire__sample_interval = (1 << 10);
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constexpr uint32_t scipd__sample_interval = (1 << 10);
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while (sample < target) {
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while (!(aica_sound.common.SCIPD() & scipd__sample_interval));
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aica_sound.common.scire = scire__sample_interval;
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sample++;
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}
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request_chunk();
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if (!started) {
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aica_sound.channel[0].KYONEX(1);
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}
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}
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}
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