ibm4704_usb: Fix protocol handling
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6b588eb7f7
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5 changed files with 29 additions and 29 deletions
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@ -8,6 +8,7 @@ Keyboard initialization process takes a few seconds at start up. During that you
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Update
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------
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2015/05/05 Added keymaps for 107-key, 77-key and 50-key. Thanks, orihalcon @ geekhack!
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2015/05/19 Fixed a protocol handling bug.
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@ -53,7 +53,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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/* Pin interrupt on rising edge of clock */
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#define IBM4704_INT_INIT() do { EICRA |= ((1<<ISC11)|(1<<ISC10)); } while (0)
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#define IBM4704_INT_ON() do { EIMSK |= (1<<INT1); } while (0)
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#define IBM4704_INT_ON() do { EIFR |= (1<<INTF1); EIMSK |= (1<<INT1); } while (0)
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#define IBM4704_INT_OFF() do { EIMSK &= ~(1<<INT1); } while (0)
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#define IBM4704_INT_VECT INT1_vect
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@ -166,13 +166,14 @@ Data sent from host:
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| `-----`--- scan code
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`------------- enable bit(0: enable repeat, 1: enable break)
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00-77 Enable repeat(78-7F: invalid scancode)
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80-F7 Enable break(F8-FF: invalid scancode)
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00-79 Enable repeat
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80-F9 Enable break(FA-FF are used as other commands, see above.)
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FE Resend(011ah) no need to use
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FF End(0114h) exits FC command mode.
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Response from keyboard:
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FD Out of bound - Invalid scancode
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-- OK - No response means that command is accepted.
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Examples:
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To enable break code of all keys.
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@ -67,35 +67,31 @@ uint8_t matrix_cols(void)
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static void enable_break(void)
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{
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uint8_t ret;
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print("Enable break: ");
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// valid scancode: 00-79h
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for (uint8_t code = 0; code < 0x7A; code++) {
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while (ibm4704_send(0x80|code)) _delay_ms(1);
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// get none when ok, get FD when out of bound
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_delay_ms(5);
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if ((ret = ibm4704_recv()) != 0xff) {
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xprintf("c%02X:r%02X ", code, ret);
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}
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_delay_ms(1);
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while (ibm4704_send(0x80|code)) _delay_ms(10);
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_delay_ms(5); // wait for response
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// No response(FF) when ok, FD when out of bound
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xprintf("s%02X:r%02X ", code, ibm4704_recv());
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}
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_delay_us(1000);
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while (ibm4704_send(0xFF)) { _delay_ms(1); } // End
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while (ibm4704_send(0xFF)) { _delay_ms(10); } // End
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print("End\n");
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}
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void matrix_setup(void)
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{
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ibm4704_init();
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}
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void matrix_init(void)
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{
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debug_enable = true;
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ibm4704_init();
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matrix_clear();
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_delay_ms(2000); // wait for starting up debug console
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print("IBM 4704 converter\n");
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while (ibm4704_send(0xFE)) _delay_ms(1); // resend
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_delay_ms(5);
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matrix_clear();
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_delay_ms(2000); // wait for keyboard starting up
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xprintf("Keyboard ID: %02X\n", ibm4704_recv());
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enable_break();
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}
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