Zack Buhman
0aea1d0db2
aica_gdrom currently copies from system ram to AICA ram, 128 bytes at a time, synchronized with the AICA sample timer.
93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
#include "aica/aica.hpp"
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extern volatile uint32_t dram[0x200000] __asm("dram");
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__attribute__((section(".buffers.chunk")))
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static uint32_t chunk[2][(128 * 2) / 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(128);
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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(0x0);
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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(0);
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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(1);
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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 = 0; // increment once every 1 samples
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constexpr uint32_t tima = 256 - 128; // interrupt after 1 count
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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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uint32_t next_chunk = 0;
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aica_sound.channel[0].SA(reinterpret_cast<const uint32_t>(&chunk[next_chunk][0]));
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aica_sound.channel[0].KYONEX(1);
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next_chunk = (next_chunk + 1) % 2;
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request_chunk();
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constexpr uint32_t timer_a_interrupt = (1 << 6);
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aica_sound.common.tactl_tima = aica::tactl_tima::TACTL(tactl)
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| aica::tactl_tima::TIMA(tima);
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aica_sound.common.scire = timer_a_interrupt;
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uint32_t index = 0;
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while (1) {
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if (aica_sound.common.SCIPD() & timer_a_interrupt) {
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aica_sound.channel[0].SA(reinterpret_cast<const uint32_t>(&chunk[next_chunk][0]));
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aica_sound.common.tactl_tima = aica::tactl_tima::TACTL(tactl)
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| aica::tactl_tima::TIMA(tima);
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aica_sound.common.scire = timer_a_interrupt;
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next_chunk = (next_chunk + 1) % 2;
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request_chunk();
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//dram[0] = (0xEE << 24) | index++;
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}
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}
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}
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