Zack Buhman
0aea1d0db2
aica_gdrom currently copies from system ram to AICA ram, 128 bytes at a time, synchronized with the AICA sample timer.
76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
#include "aica/aica.hpp"
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extern void * _sine_start __asm("_binary_audio_pcm_start");
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extern volatile uint32_t dram[0x200000] __asm("dram");
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extern "C"
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void main()
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{
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const uint32_t sine_addr = reinterpret_cast<uint32_t>(&_sine_start);
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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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uint32_t segment = 0;
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dram[0] = 0x11223344;
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dram[1] = sine_addr;
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constexpr uint32_t timer_a_interrupt = (1 << 6);
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aica_sound.common.scire = timer_a_interrupt;
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uint32_t next_sa = sine_addr;
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bool started = 0;
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while (1) {
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if (!started || (aica_sound.common.SCIPD() & timer_a_interrupt)) {
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aica_sound.channel[0].SA(next_sa);
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aica_sound.common.tactl_tima =
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aica::tactl_tima::TACTL(0) // increment once every 128 samples
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| aica::tactl_tima::TIMA(256 - 128) // interrupt after 128 counts
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;
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if (!started) { aica_sound.channel[0].KYONEX(1); started = 1; }
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aica_sound.common.scire = timer_a_interrupt;
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dram[1] = next_sa;
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segment += 1;
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if (segment >= 3440) segment = 0;
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next_sa = sine_addr + (128 * 2) * segment;
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}
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}
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}
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