max/tmk_keyboard
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

ibmpc: Check buffer full and error code FF

Browse source
This commit is contained in:
tmk 2020-03-02 01:48:11 +09:00
parent 0b1fbeb135
commit 0481aa08e5
2 changed files with 15 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
tmk_core/protocol/ibmpc.c
View file

@ -268,8 +268,7 @@ ISR(IBMPC_INT_VECT)
break;
case 0b11000000:
// XT_Clone-done
recv_data = recv_data<<8;
recv_data |= (isr_state>>8) & 0xFF;
isr_state = isr_state>>8;
goto DONE;
break;
case 0b10100000: // ^2
@ -284,8 +283,7 @@ ISR(IBMPC_INT_VECT)
goto NEXT;
} else {
// no stop bit: XT_IBM-done
recv_data = recv_data<<8;
recv_data |= (isr_state>>8) & 0xFF;
isr_state = isr_state>>8;
goto DONE;
}
}
@ -294,10 +292,9 @@ ISR(IBMPC_INT_VECT)
case 0b10010000:
case 0b01010000:
case 0b11010000:
// TODO: parity check?
// AT-done
recv_data = recv_data<<8;
recv_data |= (isr_state>>6) & 0xFF;
// TODO: parity check?
isr_state = isr_state>>6;
goto DONE;
break;
case 0b01100000:
@ -318,7 +315,16 @@ ERROR:
recv_data = 0xFF00; // clear data and scancode of error 0x00
return;
DONE:
// TODO: process error code: 0x00(AT), 0xFF(XT) in particular
if ((isr_state & 0x00FF) == 0x00FF) {
// receive error code 0xFF
ibmpc_error = IBMPC_ERR_FF;
}
if ((recv_data & 0xFF00) != 0xFF00) {
// buffer full and overwritten
ibmpc_error = IBMPC_ERR_FULL;
}
recv_data = recv_data<<8;
recv_data |= isr_state & 0xFF;
isr_state = 0x8000; // clear to next data
NEXT:
return;

1
tmk_core/protocol/ibmpc.h
View file

@ -80,6 +80,7 @@ POSSIBILITY OF SUCH DAMAGE.
#define IBMPC_ERR_TIMEOUT 0x20
#define IBMPC_ERR_FULL 0x40
#define IBMPC_ERR_ILLEGAL 0x80
#define IBMPC_ERR_FF 0xFF
#define IBMPC_LED_SCROLL_LOCK 0
#define IBMPC_LED_NUM_LOCK 1