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ibm4704_usb: Fix protocol handling

This commit is contained in:
tmk 2015-05-19 00:32:58 +09:00
parent 6b588eb7f7
commit 80fd3b0b24
5 changed files with 29 additions and 29 deletions
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1
converter/ibm4704_usb/README.md
View File

@ -8,6 +8,7 @@ Keyboard initialization process takes a few seconds at start up. During that you
Update
------
2015/05/05 Added keymaps for 107-key, 77-key and 50-key. Thanks, orihalcon @ geekhack!
2015/05/19 Fixed a protocol handling bug.

2
converter/ibm4704_usb/config.h
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@ -53,7 +53,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
/* Pin interrupt on rising edge of clock */
#define IBM4704_INT_INIT() do { EICRA |= ((1<<ISC11)|(1<<ISC10)); } while (0)
#define IBM4704_INT_ON() do { EIMSK |= (1<<INT1); } while (0)
#define IBM4704_INT_ON() do { EIFR |= (1<<INTF1); EIMSK |= (1<<INT1); } while (0)
#define IBM4704_INT_OFF() do { EIMSK &= ~(1<<INT1); } while (0)
#define IBM4704_INT_VECT INT1_vect

5
converter/ibm4704_usb/ibm4704.txt
View File

@ -166,13 +166,14 @@ Data sent from host:
| `-----`--- scan code
`------------- enable bit(0: enable repeat, 1: enable break)
00-77 Enable repeat(78-7F: invalid scancode)
80-F7 Enable break(F8-FF: invalid scancode)
00-79 Enable repeat
80-F9 Enable break(FA-FF are used as other commands, see above.)
FE Resend(011ah) no need to use
FF End(0114h) exits FC command mode.
Response from keyboard:
FD Out of bound - Invalid scancode
-- OK - No response means that command is accepted.
Examples:
To enable break code of all keys.

30
converter/ibm4704_usb/matrix.c
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@ -67,35 +67,31 @@ uint8_t matrix_cols(void)
static void enable_break(void)
{
uint8_t ret;
print("Enable break: ");
// valid scancode: 00-79h
for (uint8_t code = 0; code < 0x7A; code++) {
while (ibm4704_send(0x80|code)) _delay_ms(1);
// get none when ok, get FD when out of bound
_delay_ms(5);
if ((ret = ibm4704_recv()) != 0xff) {
xprintf("c%02X:r%02X ", code, ret);
}
_delay_ms(1);
while (ibm4704_send(0x80|code)) _delay_ms(10);
_delay_ms(5); // wait for response
// No response(FF) when ok, FD when out of bound
xprintf("s%02X:r%02X ", code, ibm4704_recv());
}
_delay_us(1000);
while (ibm4704_send(0xFF)) { _delay_ms(1); } // End
while (ibm4704_send(0xFF)) { _delay_ms(10); } // End
print("End\n");
}
void matrix_setup(void)
{
ibm4704_init();
}
void matrix_init(void)
{
debug_enable = true;
ibm4704_init();
matrix_clear();
_delay_ms(2000); // wait for starting up debug console
print("IBM 4704 converter\n");
while (ibm4704_send(0xFE)) _delay_ms(1); // resend
_delay_ms(5);
matrix_clear();
_delay_ms(2000); // wait for keyboard starting up
xprintf("Keyboard ID: %02X\n", ibm4704_recv());
enable_break();
}

20
tmk_core/protocol/ibm4704.c
View File

@ -21,9 +21,10 @@ uint8_t ibm4704_error = 0;
void ibm4704_init(void)
{
inhibit(); // keep keyboard from sending
IBM4704_INT_INIT();
IBM4704_INT_ON();
idle();
idle(); // allow keyboard sending
}
/*
@ -132,8 +133,8 @@ Stop bit: Keyboard pulls down Data line to lo after 9th clock.
ISR(IBM4704_INT_VECT)
{
static enum {
STOP, BIT0, BIT1, BIT2, BIT3, BIT4, BIT5, BIT6, BIT7, PARITY
} state = STOP;
BIT0, BIT1, BIT2, BIT3, BIT4, BIT5, BIT6, BIT7, PARITY, STOP
} state = BIT0;
// LSB first
static uint8_t data = 0;
// Odd parity
@ -141,11 +142,7 @@ ISR(IBM4704_INT_VECT)
ibm4704_error = 0;
switch (state++) {
case STOP:
// Data:Low
WAIT(data_lo, 10, state);
break;
switch (state) {
case BIT0:
case BIT1:
case BIT2:
@ -166,6 +163,10 @@ ISR(IBM4704_INT_VECT)
}
if (!parity)
goto ERROR;
break;
case STOP:
// Data:Low
WAIT(data_lo, 100, state);
rbuf_enqueue(data);
ibm4704_error = IBM4704_ERR_NONE;
goto DONE;
@ -173,13 +174,14 @@ ISR(IBM4704_INT_VECT)
default:
goto ERROR;
}
state++;
goto RETURN;
ERROR:
ibm4704_error = state;
while (ibm4704_send(0xFE)) _delay_ms(1); // resend
xprintf("R:%02X%02X\n", state, data);
DONE:
state = STOP;
state = BIT0;
data = 0;
parity = false;
RETURN: