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#include "Serial.h"
#include "Interrupts.h"
#include <psxsio.h>
#include <stdarg.h>
#include <stdio.h>
#include <psxbios.h>
#include <psx.h>
#include <stddef.h>
enum
{
FIFO_SZ = 128
};
typedef volatile struct
{
unsigned char buf[FIFO_SZ];
size_t pending, processed;
bool full;
} fifo;
static fifo rx;
void sio_handler_callback(void)
{
while (SIOCheckInBuffer())
{
const unsigned char in = SIOReadByte();
size_t aux = rx.pending;
if (++aux >= (sizeof rx.buf / sizeof *rx.buf))
aux = 0;
if (aux != rx.processed)
{
rx.buf[aux] = in;
rx.pending = rx.processed;
}
else
{
rx.full = true;
}
}
SIOAcknowledgeInterrupt();
}
void SerialInit(void)
{
enum
{
SPEC_COUNTER_BECOMES_ZERO = 0x0001,
SPEC_INTERRUPTED = 0x0002,
SPEC_EOF = 0x0004,
SPEC_FILE_WAS_CLOSED = 0x0008,
SPEC_CMD_ACK = 0x0010,
SPEC_CMD_COMPLETED = 0x0020,
SPEC_DATA_READY = 0x0040,
SPEC_DATA_END = 0x0080,
SPEC_TIMEOUT = 0x0100,
SPEC_UNKNOWN_CMD = 0x0200,
SPEC_END_READ_BUFFER = 0x0400,
SPEC_END_WRITE_BUFFER = 0x0800,
SPEC_GENERAL_INTERRUPT = 0x1000,
SPEC_NEW_DEVICE = 0x2000,
SPEC_SYS_CALL_INSTR = 0x4000,
SPEC_ERROR = 0x8000,
SPEC_PREV_WRITE_ERROR = 0x8001,
SPEC_DOMAIN_ERROR_LIBMATH = 0x0301,
SPEC_RANGE_ERROR_LIBMATH = 0x0302
};
enum
{
SIO_CLASS = 0xF000000B,
TRIGGER_CALLBACK = 0x1000,
BAUD_RATE = 115200
};
const int not_crit = EnterCriticalSection();
void sio_handler(void);
SIOReset();
SIOStart(BAUD_RATE);
const int sio_handle = OpenEvent(SIO_CLASS, SPEC_GENERAL_INTERRUPT, TRIGGER_CALLBACK, sio_handler);
if (sio_handle != 0xFFFFFFFF)
EnableEvent(sio_handle);
IMASK |= 1 << INT_SIO;
SIOEnableRXInterrupt();
if (not_crit)
{
ExitCriticalSection();
}
}
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