static void matrix_make(uint8_t code);
static void matrix_break(uint8_t code);
-static int8_t process_cs1(void);
-static int8_t process_cs2(void);
-static int8_t process_cs3(void);
+static int8_t process_cs1(uint8_t code);
+static int8_t process_cs2(uint8_t code);
+static int8_t process_cs3(uint8_t code);
static uint8_t matrix[MATRIX_ROWS];
* d. ID is BF BF: Terminal keyboard CodeSet3
* e. error on recv: maybe broken PS/2
*/
+uint8_t current_protocol = 0;
uint16_t keyboard_id = 0x0000;
keyboard_kind_t keyboard_kind = NONE;
uint8_t matrix_scan(void)
// scan code reading states
static enum {
INIT,
+ WAIT_SETTLE,
+ AT_RESET,
XT_RESET,
XT_RESET_WAIT,
XT_RESET_DONE,
if (ibmpc_error) {
- xprintf("\nERR:%02X\n", ibmpc_error);
+ xprintf("\nERR:%02X ISR:%04X ", ibmpc_error, ibmpc_isr_debug);
// when recv error, neither send error nor buffer full
if (!(ibmpc_error & (IBMPC_ERR_SEND | IBMPC_ERR_FULL))) {
// keyboard init again
if (state == LOOP) {
- xprintf("init\n");
+ xprintf("[RST] ");
state = INIT;
}
}
// clear or process error
ibmpc_error = IBMPC_ERR_NONE;
+ ibmpc_isr_debug = 0;
+ }
+
+ // check protocol change AT/XT
+ if (ibmpc_protocol && ibmpc_protocol != current_protocol) {
+ xprintf("\nPRT:%02X ISR:%04X ", ibmpc_protocol, ibmpc_isr_debug);
+
+ // protocol change between AT and XT indicates that
+ // keyboard is hotswapped or something goes wrong.
+ // This requires initializing keyboard again probably.
+ if (((current_protocol&IBMPC_PROTOCOL_XT) && (ibmpc_protocol&IBMPC_PROTOCOL_AT)) ||
+ ((current_protocol&IBMPC_PROTOCOL_AT) && (ibmpc_protocol&IBMPC_PROTOCOL_XT))) {
+ if (state == LOOP) {
+ xprintf("[CHG] ");
+ state = INIT;
+ }
+ }
+
+ current_protocol = ibmpc_protocol;
+ ibmpc_isr_debug = 0;
}
switch (state) {
case INIT:
+ ibmpc_host_disable();
+
xprintf("I%u ", timer_read());
keyboard_kind = NONE;
keyboard_id = 0x0000;
matrix_clear();
clear_keyboard();
- state = XT_RESET;
+ init_time = timer_read();
+ state = WAIT_SETTLE;
+ break;
+ case WAIT_SETTLE:
+ // wait for keyboard to settle after plugin
+ if (timer_elapsed(init_time) > 1000) {
+ state = AT_RESET;
+ }
+ break;
+ case AT_RESET:
+ ibmpc_host_isr_clear();
+ ibmpc_host_enable();
+ wait_ms(1); // keyboard can't respond to command without this
+
+ // SKIDATA-2-DE(and some other keyboards?) stores 'Code Set' setting in nonvlatile memory
+ // and keeps it until receiving reset. Sending reset here may be useful to clear it, perhaps.
+ // https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-AT-Keyboard-Protocol#select-alternate-scan-codesf0
+
+ // reset command
+ if (0xFA == ibmpc_host_send(0xFF)) {
+ state = WAIT_AA;
+ } else {
+ state = XT_RESET;
+ }
+ xprintf("A%u ", timer_read());
break;
case XT_RESET:
// Reset XT-initialize keyboard
// XT: hard reset 500ms for IBM XT Type-1 keyboard and clones
- // XT: soft reset 20ms min(clock Lo)
- ibmpc_host_disable(); // soft reset: inihibit(clock Lo/Data Hi)
- IBMPC_RST_LO(); // hard reset: reset pin Lo
+ // XT: soft reset 20ms min
+ // https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-XT-Keyboard-Protocol#keyboard-soft-reset
+ ibmpc_host_disable(); // soft reset: Clock Lo/Data Hi
+ IBMPC_RST_LO(); // hard reset: Reset pin Lo
init_time = timer_read();
state = XT_RESET_WAIT;
}
break;
case XT_RESET_DONE:
- IBMPC_RST_HIZ(); // hard reset: reset pin HiZ
+ IBMPC_RST_HIZ(); // hard reset: Reset pin HiZ
ibmpc_host_isr_clear();
- ibmpc_host_enable(); // soft reset: idle(clock Hi/Data Hi)
+ ibmpc_host_enable(); // soft reset: idle(Clock Hi/Data Hi)
xprintf("X%u ", timer_read());
init_time = timer_read();
}
break;
case READ_ID:
- xprintf("R%u ", timer_read());
-
- // SKIDATA-2-DE(and some other keyboards?) stores 'Code Set' setting in nonvlatile memory
- // and keeps it until receiving reset. Sending reset here may be useful to clear it, perhaps.
- // https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-AT-Keyboard-Protocol#select-alternate-scan-codesf0
- //ibmpc_host_send(0xFF); // reset command
- //read_wait(500); // BAT takes 600-900ms(84-key) or 300-500ms(101/102-key) [8] 4-7, 4-39
-
keyboard_id = read_keyboard_id();
- if (ibmpc_error) {
- xprintf("\nERR:%02X\n", ibmpc_error);
- ibmpc_error = IBMPC_ERR_NONE;
- }
+ xprintf("R%u ", timer_read());
if (0x0000 == keyboard_id) { // CodeSet2 AT(IBM PC AT 84-key)
keyboard_kind = PC_AT;
keyboard_kind = PC_AT;
}
- xprintf("ID:%04X(%d)\n", keyboard_id, keyboard_kind);
+ xprintf("\nID:%04X(%d) ", keyboard_id, keyboard_kind);
state = SETUP;
break;
case PC_TERMINAL:
// Set all keys to make/break type
ibmpc_host_send(0xF8);
+ // This should not be harmful
+ led_set(host_keyboard_leds());
break;
default:
break;
state = LOOP;
xprintf("L%u ", timer_read());
case LOOP:
- switch (keyboard_kind) {
- case PC_XT:
- if (process_cs1() == -1) state = INIT;
- break;
- case PC_AT:
- if (process_cs2() == -1) state = INIT;
- break;
- case PC_TERMINAL:
- if (process_cs3() == -1) state = INIT;
+ {
+ uint16_t code = ibmpc_host_recv();
+ if (code == -1) {
+ // no code
break;
- default:
+ }
+
+ // Keyboard Error/Overrun([3]p.26) or Buffer full
+ // Scan Code Set 1: 0xFF
+ // Scan Code Set 2 and 3: 0x00
+ // Buffer full(IBMPC_ERR_FULL): 0xFF
+ if (code == 0x00 || code == 0xFF) {
+ // clear stuck keys
+ matrix_clear();
+ clear_keyboard();
+
+ xprintf("\n[OVR] ");
break;
+ }
+
+ switch (keyboard_kind) {
+ case PC_XT:
+ if (process_cs1(code) == -1) state = INIT;
+ break;
+ case PC_AT:
+ if (process_cs2(code) == -1) state = INIT;
+ break;
+ case PC_TERMINAL:
+ if (process_cs3(code) == -1) state = INIT;
+ break;
+ default:
+ break;
+ }
}
break;
default:
void led_set(uint8_t usb_led)
{
- //if (keyboard_kind != PC_AT) return;
+ // Sending before keyboard recognition may be harmful for XT keyboard
+ if (keyboard_kind == NONE) return;
+
+ // XT keyobard doesn't support any command and it is harmful perhaps
+ // https://github.com/tmk/tmk_keyboard/issues/635#issuecomment-626993437
+ if (keyboard_kind == PC_XT) return;
+ // It should be safe to send the command to keyboards with AT protocol
+ // - IBM Terminal doesn't support the command and response with 0xFE but it is not harmful.
+ // - Some other Terminals like G80-2551 supports the command.
+ // https://geekhack.org/index.php?topic=103648.msg2894921#msg2894921
+
+ // TODO: PC_TERMINAL_IBM_RT support
uint8_t ibmpc_led = 0;
if (usb_led & (1<<USB_LED_SCROLL_LOCK))
ibmpc_led |= (1<<IBMPC_LED_SCROLL_LOCK);
return 0x00;
}
-static int8_t process_cs1(void)
+static int8_t process_cs1(uint8_t code)
{
static enum {
INIT,
E0,
- // Pause: E1 1D 45, E1 9D C5 [a] (TODO: test)
+ // Pause: E1 1D 45, E1 9D C5 [a]
E1,
E1_1D,
E1_9D,
} state = INIT;
- uint16_t code = ibmpc_host_recv();
- if (code == -1) {
- return 0;
- }
-
- // Check invalid codes; 0x59-7F won't be used in real XT keyboards probably
- // 0x62 is used to handle escape code E0 and E1
- if ((code & 0x7F) >= 0x62) {
- xprintf("!CS1_INV!\n");
- state = INIT;
- return -1;
- }
-
switch (state) {
case INIT:
switch (code) {
- case 0x00:
- case 0xFF: // Error/Overrun [3]p.26
- xprintf("!CS1_ERR!\n");
- return -1;
- break;
case 0xE0:
state = E0;
break;
case E1_1D:
switch (code) {
case 0x45:
- matrix_make(0x55);
+ matrix_make(0x55); // Pause
+ state = INIT;
break;
default:
state = INIT;
break;
case E1_9D:
switch (code) {
- case 0x45:
- matrix_break(0x55);
+ case 0xC5:
+ matrix_break(0x55); // Pause
+ state = INIT;
break;
default:
state = INIT;
case 0x75: return 0x4F; // cursor up
case 0x7A: return 0x56; // page down
case 0x7D: return 0x5E; // page up
- case 0x7C: return 0x6F; // Print Screen
+ case 0x7C: return 0x7F; // Print Screen
case 0x7E: return 0x00; // Control'd Pause
case 0x21: return 0x65; // volume down
case 0x32: return 0x6E; // volume up
- case 0x23: return 0x7F; // mute
+ case 0x23: return 0x6F; // mute
case 0x10: return 0x08; // (WWW search) -> F13
case 0x18: return 0x10; // (WWW favourites) -> F14
case 0x20: return 0x18; // (WWW refresh) -> F15
}
}
-static int8_t process_cs2(void)
+static int8_t process_cs2(uint8_t code)
{
// scan code reading states
static enum {
E1_F0_14_F0,
} state = INIT;
- uint16_t code = ibmpc_host_recv();
- if (code == -1) {
- return 0;
- }
-
switch (state) {
case INIT:
switch (code) {
- case 0x00: // Error/Overrun [3]p.26
- xprintf("!CS2_OVR!\n");
- matrix_clear();
- clear_keyboard();
- break;
- case 0xFF:
- matrix_clear();
- xprintf("!CS2_ERR!\n");
- state = INIT;
- return -1;
- break;
case 0xE0:
state = E0;
break;
state = INIT;
break;
case 0x84: // Alt'd PrintScreen
- matrix_make(0x6F);
+ matrix_make(0x7F);
state = INIT;
break;
case 0xAA: // Self-test passed
case 0xFC: // Self-test failed
- // reset or plugin-in new keyboard
- state = INIT;
- return -1;
- break;
+ // replug or unstable connection probably
default: // normal key make
state = INIT;
if (code < 0x80) {
state = INIT;
break;
case 0x84: // Alt'd PrintScreen
- matrix_break(0x6F);
+ matrix_break(0x7F);
state = INIT;
break;
default:
* See [3], [7] and
* https://github.com/tmk/tmk_keyboard/wiki/IBM-PC-AT-Keyboard-Protocol#scan-code-set-3
*/
-static int8_t process_cs3(void)
+static int8_t process_cs3(uint8_t code)
{
static enum {
READY,
#endif
} state = READY;
- uint16_t code = ibmpc_host_recv();
- if (code == -1) {
- return 0;
- }
-
switch (state) {
case READY:
switch (code) {
- case 0x00: // Error/Overrun [3]p.26
- xprintf("!CS3_OVR!\n");
- matrix_clear();
- clear_keyboard();
- break;
- case 0xFF:
- xprintf("!CS3_ERR!\n");
- return -1;
- break;
case 0xF0:
state = F0;
break;
matrix_make(code);
} else {
xprintf("!CS3_READY!\n");
- //return -1;
+ return -1;
}
}
break;
case F0: // Break code
switch (code) {
- case 0x00:
- xprintf("!CS3_F0_OVR!\n");
- matrix_clear();
- clear_keyboard();
- state = READY;
- break;
- case 0xFF:
- xprintf("!CS3_F0_ERR!\n");
- state = READY;
- return -1;
- break;
case 0x83: // PrintScreen
matrix_break(0x02);
state = READY;
matrix_break(code);
} else {
xprintf("!CS3_F0!\n");
- //return -1;
+ return -1;
}
}
break;
projects / max / tmk_keyboard.git / blobdiff