253 lines
6 KiB
C
253 lines
6 KiB
C
#include <avr/interrupt.h>
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#include <avr/pgmspace.h>
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#include "usb_keycodes.h"
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#include "usb_keyboard.h"
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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// keyboard report.
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static usb_keyboard_report_t _report0 = { {0}, 0, false };
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static usb_keyboard_report_t _report1 = { {0}, 0, false };
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usb_keyboard_report_t *usb_keyboard_report = &_report0;
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usb_keyboard_report_t *usb_keyboard_report_prev = &_report1;
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// protocol setting from the host. We use exactly the same report
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// either way, so this variable only stores the setting since we
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// are required to be able to report which setting is in use.
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uint8_t usb_keyboard_protocol=1;
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// the idle configuration, how often we send the report to the
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// host (ms * 4) even when it hasn't changed
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uint8_t usb_keyboard_idle_config=125;
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// count until idle timeout
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uint8_t usb_keyboard_idle_count=0;
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// 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
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volatile uint8_t usb_keyboard_leds=0;
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// enable USB NKRO
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bool usb_keyboard_nkro = false;
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int8_t usb_keyboard_send(void)
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{
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return usb_keyboard_send_report(usb_keyboard_report);
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}
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static inline int8_t _send_report(usb_keyboard_report_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end);
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int8_t usb_keyboard_send_report(usb_keyboard_report_t *report)
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{
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int8_t result = 0;
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#ifdef USB_NKRO_ENABLE
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if (usb_keyboard_nkro)
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result = _send_report(report, KBD2_ENDPOINT, 0, KBD2_REPORT_KEYS);
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else
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#endif
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{
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if (usb_keyboard_protocol)
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result = _send_report(report, KBD_ENDPOINT, 0, KBD_REPORT_KEYS);
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else
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result = _send_report(report, KBD_ENDPOINT, 0, 6);
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}
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if (result) return result;
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usb_keyboard_idle_count = 0;
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report->is_sent =true;
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usb_keyboard_print_report(report);
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return 0;
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}
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void usb_keyboard_swap_report(void) {
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usb_keyboard_report_t *tmp = usb_keyboard_report_prev;
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usb_keyboard_report_prev = usb_keyboard_report;
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usb_keyboard_report = tmp;
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}
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void usb_keyboard_clear_report(void) {
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usb_keyboard_clear_keys();
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usb_keyboard_clear_mods();
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usb_keyboard_report->is_sent = false;
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}
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void usb_keyboard_clear_keys(void) {
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for (int i = 0; i < KEYS_MAX; i++) usb_keyboard_report->keys[i] = 0;
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}
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void usb_keyboard_clear_mods(void)
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{
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usb_keyboard_report->mods = 0;
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}
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void usb_keyboard_set_keys(uint8_t *keys)
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{
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for (int i = 0; i < KEYS_MAX; i++)
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usb_keyboard_report->keys[i] = keys[i];
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}
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void usb_keyboard_set_mods(uint8_t mods)
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{
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usb_keyboard_report->mods = mods;
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}
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void usb_keyboard_add_code(uint8_t code)
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{
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if (IS_MOD(code)) {
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usb_keyboard_add_mod(code);
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} else {
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usb_keyboard_add_key(code);
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}
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}
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static inline void _add_key_byte(uint8_t code);
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static inline void _add_key_bit(uint8_t code);
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void usb_keyboard_add_key(uint8_t code)
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{
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#ifdef USB_NKRO_ENABLE
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if (usb_keyboard_nkro) {
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_add_key_bit(code);
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return;
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}
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#endif
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_add_key_byte(code);
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}
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void usb_keyboard_add_mod(uint8_t code)
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{
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usb_keyboard_report->mods |= MOD_BIT(code);
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}
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void usb_keyboard_del_code(uint8_t code)
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{
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if (IS_MOD(code)) {
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usb_keyboard_del_mod(code);
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} else {
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usb_keyboard_del_key(code);
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}
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}
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void usb_keyboard_del_key(uint8_t code)
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{
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#ifdef USB_NKRO_ENABLE
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if ((code>>3) < KEYS_MAX) {
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usb_keyboard_keys[code>>3] &= ~(1<<(code&7));
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}
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#else
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for (int i = 0; i < KEYS_MAX; i++) {
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if (usb_keyboard_report->keys[i] == code) {
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usb_keyboard_report->keys[i] = KB_NO;
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return;
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}
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}
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#endif
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}
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void usb_keyboard_del_mod(uint8_t code)
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{
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usb_keyboard_report->mods &= ~MOD_BIT(code);
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}
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bool usb_keyboard_is_sent(void)
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{
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return usb_keyboard_report->is_sent;
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}
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bool usb_keyboard_has_key(void)
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{
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uint8_t keys = 0;
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for (int i = 0; i < KEYS_MAX; i++) keys |= usb_keyboard_report->keys[i];
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return keys ? true : false;
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}
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bool usb_keyboard_has_mod(void)
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{
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return usb_keyboard_report->mods ? true : false;
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}
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uint8_t usb_keyboard_get_key(void)
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{
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#ifdef USB_NKRO_ENABLE
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if (usb_keyboard_nkro) {
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uint8_t i = 0;
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for (; i < KEYS_MAX && !usb_keyboard_keys[i]; i++);
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return i<<3 | biton(usb_keyboard_keys[i]);
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}
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#endif
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return usb_keyboard_keys[0];
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}
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void usb_keyboard_print_report(usb_keyboard_report_t *report)
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{
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if (!debug_keyboard) return;
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print("keys: ");
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for (int i = 0; i < KEYS_MAX; i++) { phex(report->keys[i]); print(" "); }
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print(" mods: "); phex(report->mods); print("\n");
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}
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static inline int8_t _send_report(usb_keyboard_report_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end)
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{
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uint8_t intr_state, timeout;
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if (!usb_configured()) return -1;
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intr_state = SREG;
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cli();
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UENUM = endpoint;
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timeout = UDFNUML + 50;
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while (1) {
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// are we ready to transmit?
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if (UEINTX & (1<<RWAL)) break;
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SREG = intr_state;
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// has the USB gone offline?
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if (!usb_configured()) return -1;
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// have we waited too long?
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if (UDFNUML == timeout) return -1;
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// get ready to try checking again
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intr_state = SREG;
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cli();
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UENUM = endpoint;
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}
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UEDATX = report->mods;
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if (!usb_keyboard_nkro)
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UEDATX = 0;
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for (uint8_t i = keys_start; i < keys_end; i++) {
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UEDATX = report->keys[i];
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}
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UEINTX = 0x3A;
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SREG = intr_state;
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return 0;
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}
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static inline void _add_key_byte(uint8_t code)
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{
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// TODO: fix ugly code
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int8_t i = 0;
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int8_t empty = -1;
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for (; i < KEYS_MAX; i++) {
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if (usb_keyboard_keys_prev[i] == code) {
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usb_keyboard_keys[i] = code;
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break;
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}
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if (empty == -1 &&
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usb_keyboard_keys_prev[i] == 0 &&
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usb_keyboard_keys[i] == 0) {
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empty = i;
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}
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}
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if (i == KEYS_MAX) {
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if (empty != -1) {
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usb_keyboard_keys[empty] = code;
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}
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}
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}
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static inline void _add_key_bit(uint8_t code)
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{
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if ((code>>3) < KEYS_MAX) {
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usb_keyboard_keys[code>>3] |= 1<<(code&7);
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}
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}
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