96 lines
2.6 KiB
C
96 lines
2.6 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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#include "host.h"
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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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static inline int8_t send_report(report_keyboard_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end);
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int8_t usb_keyboard_send_report(report_keyboard_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 (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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usb_keyboard_print_report(report);
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return 0;
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}
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void usb_keyboard_print_report(report_keyboard_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 < REPORT_KEYS; 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(report_keyboard_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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#ifdef USB_NKRO_ENABLE
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if (!keyboard_nkro)
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UEDATX = 0;
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#else
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UEDATX = 0;
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#endif
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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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