//
// Read characters from the terminals and puts them in the buffers.
// When a buffer is full verify its content against the inputs.
//
void
term_handler(int type, void *arg) {
int result;
int status;
char ch;
int unit = (int) arg;
int i;
// Get the device status for the terminal.
result = USLOSS_DeviceInput(USLOSS_TERM_DEV, unit, &status);
if (result != USLOSS_DEV_OK) {
USLOSS_Console("Something is wrong with terminal %d!!", unit);
USLOSS_Halt(1);
}
// If the status is "USLOSS_DEV_BUSY" then a character has been received.
if (USLOSS_TERM_STAT_RECV(status) == USLOSS_DEV_BUSY) {
ch = USLOSS_TERM_STAT_CHAR(status); // Get the characte
USLOSS_Console("%d: %c\n", unit, ch);
i = counts[unit]++;
buffers[unit][i] = ch;
if (i == NUMCHARS-1) {
assert(!strncmp(inputs[unit], buffers[unit], NUMCHARS));
done++;
}
}
}
int XXp1(char *arg)
{
int result, status;
USLOSS_Console("XXp1(): started, calling waitDevice for terminal 1\n");
result = waitDevice(USLOSS_TERM_DEV, 1, &status);
USLOSS_Console("XXp1(): after waitDevice call\n");
if ( result == -1 ) {
USLOSS_Console("XXp1(): got zap'd result from waitDevice() call. ");
USLOSS_Console("Should not have happened!\n");
}
else if ( result == 0 )
USLOSS_Console("XXp1(): status = %d\n", status);
else
USLOSS_Console("XXp1(): got %d instead of -1 or 0 from waitDevice\n",
result);
USLOSS_Console("XXp1(): receive status for terminal 1 = %d\n",
USLOSS_TERM_STAT_RECV(status));
USLOSS_Console("XXp1(): character received = %c\n",
USLOSS_TERM_STAT_CHAR(status));
quit(-3);
return 0; /* so gcc will not complain about its absence... */
} /* XXp1 */
int TermDriver(void *arg){
int unit = (int) arg;
termReaderMB[unit] = P2_MboxCreate(1,INT_SIZE);
termLookAhead[unit] = P2_MboxCreate(10,MAX_LINE);
termCharToWrite[unit] = P2_MboxCreate(1,INT_SIZE);
termWriteSem[unit] = P1_SemCreate(1);
termRunningSem[unit] = P1_SemCreate(0);
P1_Fork("Term Reader", TermReader, (void *) unit,USLOSS_MIN_STACK, 2);
P1_P(termRunningSem[unit]);
/*Turn on Terminal interrupts*/
int ctrl = 0;
int ctrl2 = 0;
ctrl = USLOSS_TERM_CTRL_RECV_INT(ctrl);
USLOSS_DeviceOutput(USLOSS_TERM_DEV,unit,(void *)ctrl);
P1_V(running);
int status = 0;
int c = 0;
int result;
while(1){
result = P1_WaitDevice(USLOSS_TERM_DEV,unit,&status);
if(result != 0 || done != 0){
break;
}
if(USLOSS_TERM_STAT_RECV(status) == USLOSS_DEV_BUSY){
P2_MboxSend(termReaderMB[unit],&status,&INT_SIZE);
}
if(USLOSS_TERM_STAT_XMIT(status) == USLOSS_DEV_READY){
if(P2_MboxCondReceive(termCharToWrite[unit],&c,&INT_SIZE) != -2){
ctrl2 = 0;
ctrl2 = USLOSS_TERM_CTRL_XMIT_INT(ctrl2);
ctrl2 = USLOSS_TERM_CTRL_RECV_INT(ctrl2);
ctrl2 = USLOSS_TERM_CTRL_CHAR(ctrl2, c);
ctrl2 = USLOSS_TERM_CTRL_XMIT_CHAR(ctrl2);
USLOSS_DeviceOutput(USLOSS_TERM_DEV, unit, (void *)ctrl2);
}else{
ctrl2 = 0;
ctrl2 = USLOSS_TERM_CTRL_RECV_INT(ctrl2);
USLOSS_DeviceOutput(USLOSS_TERM_DEV, unit, (void *)ctrl2);
}
}
}
status = 0;
P2_MboxCondSend(termReaderMB[unit],&ctrl,&status);
P1_Join(&status);
return unit;
}
//
// Read characters from terminal 0 and writes them to the USLOSS_Console.
//
void
term_handler(int type, void *arg) {
int result;
int status;
char ch;
int unit = (int) arg;
if (unit != 0) {
return;
}
// Get the device status for terminal 0.
result = USLOSS_DeviceInput(USLOSS_TERM_DEV, 0, &status);
if (result != USLOSS_DEV_OK) {
USLOSS_Console("Something is wrong with terminal 0!!");
USLOSS_Halt(1);
}
// If the status is "USLOSS_DEV_BUSY" then a character has been received.
if (USLOSS_TERM_STAT_RECV(status) == USLOSS_DEV_BUSY) {
ch = USLOSS_TERM_STAT_CHAR(status); // Get the character
USLOSS_Console("%c", ch);
}
}
