summaryrefslogtreecommitdiff
path: root/ps2_vusb/matrix.c
diff options
context:
space:
mode:
Diffstat (limited to 'ps2_vusb/matrix.c')
-rw-r--r--ps2_vusb/matrix.c492
1 files changed, 492 insertions, 0 deletions
diff --git a/ps2_vusb/matrix.c b/ps2_vusb/matrix.c
new file mode 100644
index 0000000000..c464733929
--- /dev/null
+++ b/ps2_vusb/matrix.c
@@ -0,0 +1,492 @@
+/*
+ * scan matrix
+ */
+#include <stdint.h>
+#include <stdbool.h>
+#include <avr/io.h>
+#include <util/delay.h>
+#include "print.h"
+#include "util.h"
+#include "debug.h"
+#include "ps2.h"
+#include "usb_keyboard.h"
+#include "matrix_skel.h"
+
+
+#if (MATRIX_COLS > 16)
+# error "MATRIX_COLS must not exceed 16"
+#endif
+#if (MATRIX_ROWS > 255)
+# error "MATRIX_ROWS must not exceed 255"
+#endif
+
+
+/*
+ * Matrix usage:
+ * "PS/2 Scan Codes Set 2" is assigned to 256(32x8)cells matrix.
+ * Hmm, It is very sparse and not efficient :(
+ *
+ * 8bit
+ * ---------
+ * 0| |
+ * :| XX | 00-7F for normal codes(without E0-prefix)
+ * f|_________|
+ * 10| |
+ * :| E0 XX | 80-FF for E0-prefix codes(use (XX|0x80) as code)
+ * 1f| |
+ * ---------
+ * exceptions:
+ * 83: F8[0x83](normal codes but > 0x7F)
+ * FC: PrintScreen[E0 7C or 84]
+ * FE: Puause
+ */
+#define F8 (0x83)
+#define PRINT_SCREEN (0xFC)
+#define PAUSE (0xFE)
+#define ROW(code) (code>>3)
+#define COL(code) (code&0x07)
+
+static bool is_modified = false;
+
+// matrix state buffer(1:on, 0:off)
+#if (MATRIX_COLS <= 8)
+static uint8_t matrix[MATRIX_ROWS];
+#else
+static uint16_t matrix[MATRIX_ROWS];
+#endif
+
+#ifdef MATRIX_HAS_GHOST
+static bool matrix_has_ghost_in_row(uint8_t row);
+#endif
+static void matrix_make(uint8_t code);
+static void matrix_break(uint8_t code);
+static void ps2_reset(void);
+static void ps2_set_leds(uint8_t leds);
+
+
+inline
+uint8_t matrix_rows(void)
+{
+ return MATRIX_ROWS;
+}
+
+inline
+uint8_t matrix_cols(void)
+{
+ return MATRIX_COLS;
+}
+
+void matrix_init(void)
+{
+ ps2_host_init();
+ _delay_ms(1000);
+
+ // flush LEDs
+/*
+ ps2_set_leds(1<<PS2_LED_NUM_LOCK);
+ _delay_ms(100);
+ ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK);
+ _delay_ms(100);
+ ps2_set_leds(1<<PS2_LED_NUM_LOCK|1<<PS2_LED_CAPS_LOCK|1<<PS2_LED_SCROLL_LOCK);
+ _delay_ms(300);
+ ps2_set_leds(0x00);
+*/
+
+ // initialize matrix state: all keys off
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) matrix[i] = 0x00;
+
+ return;
+}
+
+/*
+ * PS/2 Scan Code Set 2: Exceptional Handling
+ *
+ * There are several keys to be handled exceptionally.
+ * The scan code for these keys are varied or prefix/postfix'd
+ * depending on modifier key state.
+ *
+ * References:
+ * http://www.microsoft.com/whdc/archive/scancode.mspx
+ * http://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/scancode.doc
+ *
+ *
+ * Insert, Delete, Home, End, PageUp, PageDown, Up, Down, Right, Left:
+ * Num Lock: off
+ * modifiers | make | break
+ * ----------+---------------------------+----------------------
+ * Ohter | <make> | <break>
+ * LShift | E0 F0 12 <make> | <break> E0 12
+ * RShift | E0 F0 59 <make> | <break> E0 59
+ * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
+ *
+ * Num Lock: on
+ * modifiers | make | break
+ * ----------+---------------------------+----------------------
+ * Other | E0 12 <make> | <break> E0 F0 12
+ * Shift'd | <make> | <break>
+ *
+ * Handling: ignore these prefix/postfix codes
+ *
+ *
+ * Keypad-/:
+ * modifiers | make | break
+ * ----------+---------------------------+----------------------
+ * Ohter | <make> | <break>
+ * LShift | E0 F0 12 <make> | <break> E0 12
+ * RShift | E0 F0 59 <make> | <break> E0 59
+ * L+RShift | E0 F0 12 E0 F0 59 <make> | <break> E0 59 E0 12
+ *
+ * Handling: ignore these prefix/postfix codes
+ *
+ *
+ * PrintScreen:
+ * With hoding down modifiers, the scan code is sent as following:
+ *
+ * modifiers | make | break
+ * ----------+--------------+-----------------------------------
+ * Other | E0 12 E0 7C | E0 F0 7C E0 F0 12
+ * Shift'd | E0 7C | E0 F0 7C
+ * Control'd | E0 7C | E0 F0 7C
+ * Alt'd | 84 | F0 84
+ *
+ * Handling: ignore prefix/postfix codes and treat both scan code
+ * E0 7C and 84 as PrintScreen.
+ *
+ * Pause:
+ * With hoding down modifiers, the scan code is sent as following:
+ *
+ * modifiers | make(no break code)
+ * ----------+--------------------------------------------------
+ * no mods | E1 14 77 E1 F0 14 F0 77
+ * Control'd | E0 7E E0 F0 7E
+ *
+ * Handling: treat these two code sequence as Pause
+ *
+ */
+uint8_t matrix_scan(void)
+{
+
+ static enum {
+ INIT,
+ F0,
+ E0,
+ E0_F0,
+ // states for Pause/Break
+ E1,
+ E1_14,
+ E1_14_77,
+ E1_14_77_E1,
+ E1_14_77_E1_F0,
+ E1_14_77_E1_F0_14,
+ E1_14_77_E1_F0_14_F0,
+ } state = INIT;
+
+
+ is_modified = false;
+
+ // Pause/Break off(PS/2 has no break for this key)
+ if (matrix_is_on(ROW(PAUSE), COL(PAUSE))) {
+ matrix_break(PAUSE);
+ }
+
+ uint8_t code;
+ while ((code = ps2_host_recv())) {
+//debug_hex(code); debug(" ");
+ switch (state) {
+ case INIT:
+ switch (code) {
+ case 0xE0: // 2byte make
+ state = E0;
+ break;
+ case 0xF0: // break code
+ state = F0;
+ break;
+ case 0xE1: // Pause/Break
+ state = E1;
+ break;
+ case 0x83: // F8
+ matrix_make(F8);
+ state = INIT;
+ break;
+ case 0x84: // PrintScreen
+ matrix_make(PRINT_SCREEN);
+ state = INIT;
+ break;
+ default: // normal key make
+ if (code < 0x80) {
+ matrix_make(code);
+ } else {
+ debug("unexpected scan code at INIT: "); debug_hex(code); debug("\n");
+ }
+ state = INIT;
+ }
+ break;
+ case E0:
+ switch (code) {
+ case 0x12: // postfix/postfix code for exceptional keys
+ case 0x59: // postfix/postfix code for exceptional keys
+ // ignore
+ state = INIT;
+ break;
+ case 0x7E: // former part of Control-Pause[E0 7E E0 F0 7E]
+ matrix_make(PAUSE);
+ state = INIT;
+ break;
+ case 0xF0: // E0 break
+ state = E0_F0;
+ break;
+ default: // E0 make
+ if (code < 0x80) {
+ matrix_make(code|0x80);
+ } else {
+ debug("unexpected scan code at E0: "); debug_hex(code); debug("\n");
+ }
+ state = INIT;
+ }
+ break;
+ case F0:
+ switch (code) {
+ case 0x83:
+ matrix_break(F8);
+ state = INIT;
+ break;
+ case 0x84:
+ matrix_break(PRINT_SCREEN);
+ state = INIT;
+ break;
+ default:
+ if (code < 0x80) {
+ matrix_break(code);
+ } else {
+ debug("unexpected scan code at F0: "); debug_hex(code); debug("\n");
+ }
+ state = INIT;
+ }
+ break;
+ case E0_F0: // E0 break
+ switch (code) {
+ case 0x12: // postfix/postfix code for exceptional keys
+ case 0x59: // postfix/postfix code for exceptional keys
+ case 0x7E: // latter part of Control-Pause[E0 7E E0 F0 7E]
+ // ignore
+ state = INIT;
+ break;
+ default:
+ if (code < 0x80) {
+ matrix_break(code|0x80);
+ } else {
+ debug("unexpected scan code at E0_F0: "); debug_hex(code); debug("\n");
+ }
+ state = INIT;
+ }
+ break;
+ /* Pause */
+ case E1:
+ switch (code) {
+ case 0x14:
+ state = E1_14;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ case E1_14:
+ switch (code) {
+ case 0x77:
+ state = E1_14_77;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ case E1_14_77:
+ switch (code) {
+ case 0xE1:
+ state = E1_14_77_E1;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ case E1_14_77_E1:
+ switch (code) {
+ case 0xF0:
+ state = E1_14_77_E1_F0;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ case E1_14_77_E1_F0:
+ switch (code) {
+ case 0x14:
+ state = E1_14_77_E1_F0_14;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ case E1_14_77_E1_F0_14:
+ switch (code) {
+ case 0xF0:
+ state = E1_14_77_E1_F0_14_F0;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ case E1_14_77_E1_F0_14_F0:
+ switch (code) {
+ case 0x77:
+ matrix_make(PAUSE);
+ state = INIT;
+ break;
+ default:
+ state = INIT;
+ }
+ break;
+ default:
+ state = INIT;
+ }
+ }
+
+ // handle LED indicators
+/*
+ static uint8_t prev_leds = 0;
+ if (prev_leds != usb_keyboard_leds) {
+ uint8_t leds = 0;
+ if (usb_keyboard_leds&(1<<USB_LED_SCROLL_LOCK))
+ leds |= (1<<PS2_LED_SCROLL_LOCK);
+ if (usb_keyboard_leds&(1<<USB_LED_NUM_LOCK))
+ leds |= (1<<PS2_LED_NUM_LOCK);
+ if (usb_keyboard_leds&(1<<USB_LED_CAPS_LOCK))
+ leds |= (1<<PS2_LED_CAPS_LOCK);
+
+ ps2_set_leds(leds);
+ prev_leds = usb_keyboard_leds;
+ }
+*/
+
+ return 1;
+}
+
+bool matrix_is_modified(void)
+{
+ return is_modified;
+}
+
+inline
+bool matrix_has_ghost(void)
+{
+#ifdef MATRIX_HAS_GHOST
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+ if (matrix_has_ghost_in_row(i))
+ return true;
+ }
+#endif
+ return false;
+}
+
+inline
+bool matrix_is_on(uint8_t row, uint8_t col)
+{
+ return (matrix[row] & (1<<col));
+}
+
+inline
+#if (MATRIX_COLS <= 8)
+uint8_t matrix_get_row(uint8_t row)
+#else
+uint16_t matrix_get_row(uint8_t row)
+#endif
+{
+ return matrix[row];
+}
+
+void matrix_print(void)
+{
+#if (MATRIX_COLS <= 8)
+ print("\nr/c 01234567\n");
+#else
+ print("\nr/c 0123456789ABCDEF\n");
+#endif
+ for (uint8_t row = 0; row < matrix_rows(); row++) {
+ phex(row); print(": ");
+#if (MATRIX_COLS <= 8)
+ pbin_reverse(matrix_get_row(row));
+#else
+ pbin_reverse16(matrix_get_row(row));
+#endif
+#ifdef MATRIX_HAS_GHOST
+ if (matrix_has_ghost_in_row(row)) {
+ print(" <ghost");
+ }
+#endif
+ print("\n");
+ }
+}
+
+uint8_t matrix_key_count(void)
+{
+ uint8_t count = 0;
+ for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
+#if (MATRIX_COLS <= 8)
+ count += bitpop(matrix[i]);
+#else
+ count += bitpop16(matrix[i]);
+#endif
+ }
+ return count;
+}
+
+#ifdef MATRIX_HAS_GHOST
+inline
+static bool matrix_has_ghost_in_row(uint8_t row)
+{
+ // no ghost exists in case less than 2 keys on
+ if (((matrix[row] - 1) & matrix[row]) == 0)
+ return false;
+
+ // ghost exists in case same state as other row
+ for (uint8_t i=0; i < MATRIX_ROWS; i++) {
+ if (i != row && (matrix[i] & matrix[row]) == matrix[row])
+ return true;
+ }
+ return false;
+}
+#endif
+
+
+inline
+static void matrix_make(uint8_t code)
+{
+ if (!matrix_is_on(ROW(code), COL(code))) {
+ matrix[ROW(code)] |= 1<<COL(code);
+ is_modified = true;
+ }
+}
+
+inline
+static void matrix_break(uint8_t code)
+{
+ if (matrix_is_on(ROW(code), COL(code))) {
+ matrix[ROW(code)] &= ~(1<<COL(code));
+ is_modified = true;
+ }
+}
+
+static void ps2_reset(void)
+{
+ ps2_host_send(0xFF);
+ if (ps2_host_recv() != 0xFA) return;
+ _delay_ms(1000);
+ if (ps2_host_recv() != 0xAA) return;
+}
+
+static void ps2_set_leds(uint8_t leds)
+{
+ ps2_host_send(0xED);
+ if (ps2_host_recv() != 0xFA) return; // 0xFA
+ ps2_host_send(leds);
+ if (ps2_host_recv() != 0xFA) return; // 0xFA
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 01:35:31 +0000