參數(shù)資料
型號: CD1865
廠商: Intel Corp.
英文描述: Intelligent Eight-Channel Communications Controller
中文描述: 智能八通道通信控制器
文件頁數(shù): 93/150頁
文件大?。?/td> 871K
代理商: CD1865
Intelligent Eight-Channel Communications Controller
CD1865
Datasheet
93
}
case 128: // case of DSR change interrupt
{
printf(" DSR has a changed state.\n");
break;
}
default:
{
printf(" Invalid Modem interrupt detected.......\n");
break;
}
}
Set_Byte(MCR, 0x00);
// Clear the Modem Change register after
// service the modem request.
// Clear the EOSRR register at the end
// modem service routine.
Set_Byte(EOSRR, 0x00);
return;
}
8.11.5
Polled Mode Operation
The Polled-mode operation can be used with any type of host CPU, or it can be used in
combination with interrupts to provide a Mixed-mode system optimized for a particular operation.
For details refer to
Section 5.5 on page 35
.
In the Polled-mode operation, the Service Match registers need to be setup first (TSMR, RSMR,
MSMR) in the channel initialization routine. Once an interrupt is detected, it is acknowledged by
reading the corresponding register depending on the type of interrupt.
while ( !((int_status = Read_Byte( SRSR )) & 0x15 ) )
{
// waiting for interrupt.
break;
}
// Case of Receiving interrupt
if ( int_status & 0x10 )
{
Read_Byte(RSMR)
Service_Rx();
}
// Case of transmitting interrupt
if ( int_status & 0x04 )
{
Read_Byte(TSMR)
Service_Tx();
}
// case of modem interrupt
if (int_status & 0x02)
{
Read_Byte(MSMR)
Service_Mdm();
}
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