168 lines
2.8 KiB
C++
168 lines
2.8 KiB
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "../../file_io.h"
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#include "../../user_io.h"
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#include "../../spi.h"
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#include "../../hardware.h"
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#include "megacd.h"
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int loaded = 0, unloaded = 0;
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static uint8_t has_command = 0;
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void mcd_poll()
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{
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static uint32_t poll_timer = 0, stat_timer = 0;
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static uint8_t last_req = 255;
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static uint8_t adj = 0;
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if (!stat_timer || CheckTimer(stat_timer))
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{
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stat_timer = GetTimer(15);
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if (has_command) {
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spi_uio_cmd_cont(UIO_CD_SET);
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uint64_t s = cdd.GetStatus();
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spi_w((s >> 0) & 0xFFFF);
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spi_w((s >> 16) & 0xFFFF);
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spi_w(((s >> 32) & 0x00FF) | (cdd.isData ? 0x01 << 8 : 0x00 << 8));
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DisableIO();
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has_command = 0;
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//printf("\x1b[32mMCD: Send status, status = %04X%04X%04X, frame = %u\n\x1b[0m", (uint16_t)((s >> 32) & 0x00FF), (uint16_t)((s >> 16) & 0xFFFF), (uint16_t)((s >> 0) & 0xFFFF), frame);
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}
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}
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uint8_t req = spi_uio_cmd_cont(UIO_CD_GET);
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if (req != last_req)
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{
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last_req = req;
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uint16_t data_in[4];
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data_in[0] = spi_w(0);
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data_in[1] = spi_w(0);
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data_in[2] = spi_w(0);
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DisableIO();
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uint64_t c = *((uint64_t*)(data_in));
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cdd.SetCommand(c);
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cdd.CommandExec();
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has_command = 1;
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//printf("\x1b[32mMCD: Get command, command = %04X%04X%04X, has_command = %u\n\x1b[0m", data_in[2], data_in[1], data_in[0], has_command);
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}
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else
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DisableIO();
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if (!poll_timer || CheckTimer(poll_timer))
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{
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poll_timer = GetTimer(13 + (!adj ? 1 : 0));
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if (++adj >= 3) adj = 0;
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cdd.Update();
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}
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}
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void mcd_set_image(int num, const char *filename)
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{
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(void)num;
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cdd.Unload();
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unloaded = 1;
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cdd.status = CD_STAT_OPEN;
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if (*filename) {
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if (cdd.Load(filename) > 0) {
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loaded = 1;
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cdd.status = cdd.loaded ? CD_STAT_STOP : CD_STAT_NO_DISC;
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cdd.latency = 10;
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}
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else {
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cdd.status = CD_STAT_NO_DISC;
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}
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}
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}
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void mcd_reset() {
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cdd.Reset();
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}
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int cdd_t::SectorSend(uint8_t* header)
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{
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uint8_t buf[2352+2352];
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int len = 2352;
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if (header) {
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memcpy(buf + 12, header, 4);
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ReadData(buf + 16);
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}
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else {
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len = ReadCDDA(buf);
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}
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// set index byte
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user_io_set_index(CD_DATA_IO_INDEX);
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// prepare transmission of new file
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EnableFpga();
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spi8(UIO_FILE_TX);
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spi8(0xff);
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DisableFpga();
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EnableFpga();
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spi8(UIO_FILE_TX_DAT);
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spi_write(buf, len, 1);
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DisableFpga();
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// signal end of transmission
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EnableFpga();
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spi8(UIO_FILE_TX);
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spi8(0x00);
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DisableFpga();
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return 1;
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}
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int cdd_t::SubcodeSend()
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{
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uint16_t buf[98/2];
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ReadSubcode(buf);
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// set index byte
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user_io_set_index(CD_SUB_IO_INDEX);
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// prepare transmission of new file
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EnableFpga();
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spi8(UIO_FILE_TX);
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spi8(0xff);
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DisableFpga();
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EnableFpga();
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spi8(UIO_FILE_TX_DAT);
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spi_write((uint8_t*)buf, 98, 1);
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DisableFpga();
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// signal end of transmission
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EnableFpga();
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spi8(UIO_FILE_TX);
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spi8(0x00);
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DisableFpga();
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return 1;
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}
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