Zack Buhman
73a685face
Real hardware does not support TIMA reads--SCIPD is the correct way to achieve this.
65 lines
1.8 KiB
C++
65 lines
1.8 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].SA(sine_addr);
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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.MVOL(0xf);
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uint32_t segment = 0;
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aica_sound.common.TACTL(7); // increment once every 128 samples
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aica_sound.common.TIMA(255);
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aica_sound.channel[0].KYONEX(1);
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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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while (1) {
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if (aica_sound.common.SCIPD() & timer_a_interrupt) {
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aica_sound.common.scire = timer_a_interrupt;
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aica_sound.common.TIMA(255);
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segment += 1;
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if (segment >= 3440) segment = 0;
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uint32_t sa = sine_addr + (128 * 2) * segment;
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dram[1] = sa;
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aica_sound.channel[0].SA(sa);
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}
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}
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}
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