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#include <stdio.h>
#include <string.h>
#include <ioctl.h>
#include <psxapi.h>
#include <psxetc.h>
#include <psxsio.h>
#define SIO_BUFF_LEN 32
static volatile int _sio_key_pending;
static volatile int _sio_buff_rpos;
static volatile int _sio_buff_wpos;
static volatile char _sio_buff[SIO_BUFF_LEN];
static void _sio_init() {
_sio_key_pending = 0;
memset((void*)_sio_buff, 0, SIO_BUFF_LEN);
_sio_buff_rpos = 0;
_sio_buff_wpos = 0;
}
static int _sio_open(FCB *fcb, const char* file, int mode) {
fcb->diskid = 1;
return 0;
}
static int _sio_inout(FCB *fcb, int cmd) {
int i;
if(cmd == 2) { // Write
for(i=0; i<fcb->trns_len; i++) {
while(!(_sio_control(0, 0, 0) & SR_TXU));
_sio_control(1, 4, ((char*)fcb->trns_addr)[i]);
}
return fcb->trns_len;
} else if (cmd == 1) { // Read
/*for(i=0; i<fcb->trns_len; i++) {
while(!(_sio_control(0, 0, 0) & SR_RXRDY));
((char*)fcb->trns_addr)[i] = _sio_control(0, 4, 0);
}*/
for(i=0; i<fcb->trns_len; i++) {
while( _sio_key_pending == 0 );
((char*)fcb->trns_addr)[i] = _sio_buff[_sio_buff_rpos];
_sio_key_pending--;
_sio_buff_rpos++;
if( _sio_buff_rpos >= SIO_BUFF_LEN )
{
_sio_buff_rpos = 0;
}
}
return fcb->trns_len;
}
return 0;
}
static int _sio_ioctl(FCB *fcb, int cmd, int arg)
{
if( cmd == FIOCSCAN )
{
if( _sio_key_pending )
{
return 0;
}
}
return -1;
}
static int _sio_close(int h) {
return h;
}
static void _sio_tty_cb(void)
{
_sio_key_pending++;
// Get received byte
if( _sio_key_pending < SIO_BUFF_LEN )
{
_sio_buff[_sio_buff_wpos] = _sio_control(0, 4, 0);
_sio_buff_wpos++;
if( _sio_buff_wpos >= SIO_BUFF_LEN )
{
_sio_buff_wpos = 0;
}
}
else
{
_sio_control(0, 4, 0);
}
// Acknowledge SIO IRQ
_sio_control(2, 1, 0);
}
static DCB _sio_dcb = {
"tty",
0x3,
0x1,
0x0,
(void*)_sio_init, // init
(void*)_sio_open, // open
(void*)_sio_inout, // inout
_sio_close, // close
_sio_ioctl, // ioctl
NULL, // read
NULL, // write
NULL, // erase
NULL, // undelete
NULL, // firstfile
NULL, // nextfile
NULL, // format
NULL, // chdir
NULL, // rename
NULL, // remove
NULL // testdevice
};
volatile void (*_sio_callback)(void) = NULL;
void AddSIO(int baud) {
_sio_control(2, 0, 0);
_sio_control(1, 2, MR_SB_01|MR_CHLEN_8|0x02);
_sio_control(1, 3, baud);
_sio_control(1, 1, CR_RXEN|CR_TXEN|CR_RXIEN);
close(0);
close(1);
DelDev(_sio_dcb.name);
AddDev(&_sio_dcb);
Sio1Callback(_sio_tty_cb);
open(_sio_dcb.name, 2);
open(_sio_dcb.name, 1);
}
void DelSIO(void) {
Sio1Callback(NULL);
// Reset serial interface
_sio_control(2, 0, 0);
// Remove TTY device
DelDev(_sio_dcb.name);
// Add dummy TTY device
AddDummyTty();
}
void WaitSIO(void) {
while((_sio_control(0, 0, 0)&(SR_RXRDY)) != (SR_RXRDY));
_sio_control(0, 4, NULL);
}
void *Sio1Callback(void (*func)()) {
void *old_isr; //= *((int*)&_sio_callback);
EnterCriticalSection();
if( func ) {
old_isr = InterruptCallback(8, func);
//_sio_callback = func;
} else {
old_isr = InterruptCallback(8, NULL);
//_sio_callback = NULL;
}
ExitCriticalSection();
return old_isr;
}
int kbhit()
{
return(_sio_key_pending>0);
}
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