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example/aica_gdrom: poll system.ISTEXT

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This commit is contained in:
Zack Buhman 2024-09-23 10:09:46 -05:00
parent eb38cd5b9d
commit c2e41d28d4
3 changed files with 17 additions and 11 deletions
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8
example/aica_gdrom.cpp
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@ -19,6 +19,7 @@ extern void * _binary_start __asm("_binary_example_arm_sh4_interrupt_bin_start")
extern void * _binary_size __asm("_binary_example_arm_sh4_interrupt_bin_size");
constexpr uint32_t mcipd__sh4_interrupt = (1 << 5);
constexpr uint32_t miceb__sh4_interrupt = (1 << 5);
constexpr uint32_t scipd__arm_interrupt = (1 << 5);
constexpr uint32_t sectors_per_chunk = 16;
@ -64,7 +65,7 @@ void aica_init(uint32_t& chunk_index, const uint32_t * src_chunk)
}
}
chunk = reinterpret_cast<decltype (chunk)>(&aica_wave_memory[0x001f0000 / 4]);
chunk = reinterpret_cast<decltype (chunk)>(&aica_wave_memory[0x00100000 / 4]);
serial::integer<uint32_t>(reinterpret_cast<uint32_t>(&(*chunk)[0][0]));
serial::integer<uint32_t>(reinterpret_cast<uint32_t>(&(*chunk)[1][0]));
@ -83,9 +84,8 @@ void aica_init(uint32_t& chunk_index, const uint32_t * src_chunk)
void aica_step(uint32_t& chunk_index, const uint32_t * src_chunk)
{
aica_wait_read();
{ // wait for interrupt from arm
while ((aica_sound.common.MCIPD() & mcipd__sh4_interrupt) == 0) { aica_wait_read(); };
while ((system.ISTEXT & (1 << 1)) == 0);
aica_wait_write(); aica_sound.common.mcire = mcipd__sh4_interrupt;
}
@ -372,6 +372,8 @@ void main()
aica_init(chunk_index, &gdrom_buf[0]);
aica_sound.common.MCIEB(miceb__sh4_interrupt);
//serial::string("aica wave memory:\n");
//while (aica_wave_memory[0] == 0xeaffffff) { aica_wait_read(); };
//aica_wait_read(); serial::integer<uint32_t>(aica_wave_memory[0]);

4
example/arm/main.lds
View File

@ -1,8 +1,8 @@
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
MEMORY
{
ram : ORIGIN = 0x00000000, LENGTH = 0x1f0000
buffers : ORIGIN = 0x001f0000, LENGTH = 0x10000
ram : ORIGIN = 0x00000000, LENGTH = 0x100000
buffers : ORIGIN = 0x00100000, LENGTH = 0x100000
}
SECTIONS
{

16
example/arm/sh4_interrupt.cpp
View File

@ -45,8 +45,8 @@ void main()
aica_sound.channel[0].RR(0x1f);
aica_sound.channel[0].AR(0x1f);
aica_sound.channel[0].OCT(0xf);
aica_sound.channel[0].FNS(0x7d);
aica_sound.channel[0].OCT(-1);
aica_sound.channel[0].FNS(0x0);
aica_sound.channel[0].DISDL(0xf);
aica_sound.channel[0].DIPAN(0x0);
@ -72,6 +72,8 @@ void main()
dram[0] = reinterpret_cast<uint32_t>(&chunk[0][0]);
dram[1] = reinterpret_cast<uint32_t>(&chunk[1][0]);
request_chunk();
aica_sound.channel[0].SA(reinterpret_cast<const uint32_t>(&chunk[0][0]));
aica_sound.channel[0].KYONEX(1);
@ -99,16 +101,18 @@ void main()
request_chunk();
uint32_t sample = 0;
const uint32_t target = 16384 + (16384 * 10 / 12);
constexpr uint32_t sample_interval = (1 << 10);
constexpr uint32_t samples_per_sample = 2;
constexpr uint32_t target = chunk_size / 2 * samples_per_sample;
constexpr uint32_t scire__sample_interval = (1 << 10);
constexpr uint32_t scipd__sample_interval = (1 << 10);
while (sample < target) {
//aica_sound.common.tactl_tima = aica::tactl_tima::TACTL(tactl)
// | aica::tactl_tima::TIMA(tima);
//while (!(aica_sound.common.SCIPD() & timer_a_interrupt));
//aica_sound.common.scire = timer_a_interrupt;
while (!(aica_sound.common.SCIPD() & sample_interval));
aica_sound.common.scire = sample_interval;
while (!(aica_sound.common.SCIPD() & scipd__sample_interval));
aica_sound.common.scire = scire__sample_interval;
sample++;
}