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-rw-r--r--converter/ibm4704_usb/README.md1
-rw-r--r--converter/ibm4704_usb/config.h6
-rw-r--r--converter/ibm4704_usb/ibm4704.txt11
-rw-r--r--converter/ibm4704_usb/matrix.c30
4 files changed, 23 insertions, 25 deletions
diff --git a/converter/ibm4704_usb/README.md b/converter/ibm4704_usb/README.md
index 25b72ba671..15c826ab8b 100644
--- a/converter/ibm4704_usb/README.md
+++ b/converter/ibm4704_usb/README.md
@@ -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.
diff --git a/converter/ibm4704_usb/config.h b/converter/ibm4704_usb/config.h
index 4f267b3b7a..2fee10fd61 100644
--- a/converter/ibm4704_usb/config.h
+++ b/converter/ibm4704_usb/config.h
@@ -51,9 +51,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#define IBM4704_DATA_DDR DDRD
#define IBM4704_DATA_BIT 0
-/* Pin interrupt on rising edge */
-#define IBM4704_INT_INIT() do { EICRA |= ((1<<ISC11)|(0<<ISC10)); } while (0)
-#define IBM4704_INT_ON() do { EIMSK |= (1<<INT1); } while (0)
+/* Pin interrupt on rising edge of clock */
+#define IBM4704_INT_INIT() do { EICRA |= ((1<<ISC11)|(1<<ISC10)); } 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
diff --git a/converter/ibm4704_usb/ibm4704.txt b/converter/ibm4704_usb/ibm4704.txt
index 9c4895d922..e2d42f08fd 100644
--- a/converter/ibm4704_usb/ibm4704.txt
+++ b/converter/ibm4704_usb/ibm4704.txt
@@ -57,15 +57,15 @@ Keyboard to Host
----------------
Data bits are LSB first and Pairty is odd. Clock has around 60us high and 30us low part.
- ____ __ __ __ __ __ __ __ __ __ ________
- Clock \____/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
+ ____ __ __ __ __ __ __ __ __ __ _______
+ Clock \_____/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/ \_/
____ ____ ____ ____ ____ ____ ____ ____ ____ ____
Data ____/ X____X____X____X____X____X____X____X____X____X________
Start 0 1 2 3 4 5 6 7 P Stop
Start bit: can be long as 300-350us.
Inhibit: Pull Data line down to inhibit keyboard to send.
-Timing: Host reads bit while Clock is hi.
+Timing: Host reads bit while Clock is hi.(rising edge)
Stop bit: Keyboard pulls down Data line to lo after 9th clock.
@@ -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.
diff --git a/converter/ibm4704_usb/matrix.c b/converter/ibm4704_usb/matrix.c
index 5f928d716f..155df9c38f 100644
--- a/converter/ibm4704_usb/matrix.c
+++ b/converter/ibm4704_usb/matrix.c
@@ -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_init(void)
-{
- debug_enable = true;
+void matrix_setup(void)
+{
ibm4704_init();
- matrix_clear();
+}
- _delay_ms(2000); // wait for starting up debug console
+void matrix_init(void)
+{
+ debug_enable = true;
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();
}