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ibmpc: Inhibit device while buffer is full

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tmk 2021-06-19 22:17:47 +09:00
parent 22b6e87f37
commit d13ce4d06f
1 changed files with 16 additions and 3 deletions
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19
tmk_core/protocol/ibmpc.c
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@ -203,8 +203,8 @@ int16_t ibmpc_host_recv(void)
ret = 0xFF;
break;
case IBMPC_ERR_FULL:
// buffer full
dprintf("!FULL! ");
// buffer overflow
dprintf("!OVF! ");
ret = 0xFF;
break;
case 0xFF:
@ -226,6 +226,12 @@ int16_t ibmpc_host_recv(void)
}
}
// Enable ISR if recv_data is not full
if ((recv_data | 0x00FF) == 0xFFFF) {
ibmpc_host_isr_clear();
IBMPC_INT_ON();
idle();
}
//dprintf("i%04X ", ibmpc_isr_debug); ibmpc_isr_debug = 0;
dprintf("r%02X ", ret);
return ret;
@ -412,7 +418,7 @@ DONE:
goto ERROR;
}
if (HI8(recv_data) != 0xFF && LO8(recv_data) != 0xFF) {
// buffer full
// buffer overflow
ibmpc_error = IBMPC_ERR_FULL;
goto ERROR;
}
@ -420,6 +426,13 @@ DONE:
recv_data = recv_data<<8;
recv_data |= isr_state & 0xFF;
CLEAR:
// Disable ISR if recv_data is full
if ((recv_data | 0x00FF) != 0xFFFF) {
IBMPC_INT_OFF();
// inhibit: clock_lo
IBMPC_CLOCK_PORT &= ~(1<<IBMPC_CLOCK_BIT);
IBMPC_CLOCK_DDR |= (1<<IBMPC_CLOCK_BIT);
}
// clear for next data
isr_state = 0x8000;
NEXT: