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#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include "usb_keycodes.h"
#include "usb_keyboard.h"
#include "print.h"
#include "debug.h"
// keyboard report.
static usb_keyboard_report_t _report0 = { {0}, 0 };
static usb_keyboard_report_t _report1 = { {0}, 0 };
usb_keyboard_report_t *usb_keyboard_report = &_report0;
usb_keyboard_report_t *usb_keyboard_report_prev = &_report1;
// protocol setting from the host. We use exactly the same report
// either way, so this variable only stores the setting since we
// are required to be able to report which setting is in use.
uint8_t usb_keyboard_protocol=1;
// the idle configuration, how often we send the report to the
// host (ms * 4) even when it hasn't changed
uint8_t usb_keyboard_idle_config=125;
// count until idle timeout
uint8_t usb_keyboard_idle_count=0;
// 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
volatile uint8_t usb_keyboard_leds=0;
int8_t usb_keyboard_send(void)
{
return usb_keyboard_send_report(usb_keyboard_report);
}
int8_t usb_keyboard_send_report(usb_keyboard_report_t *report)
{
uint8_t i, intr_state, timeout;
if (!usb_configured()) return -1;
intr_state = SREG;
cli();
UENUM = KEYBOARD_ENDPOINT;
timeout = UDFNUML + 50;
while (1) {
// are we ready to transmit?
if (UEINTX & (1<<RWAL)) break;
SREG = intr_state;
// has the USB gone offline?
if (!usb_configured()) return -1;
// have we waited too long?
if (UDFNUML == timeout) return -1;
// get ready to try checking again
intr_state = SREG;
cli();
UENUM = KEYBOARD_ENDPOINT;
}
UEDATX = report->mods;
UEDATX = 0;
for (i = 0; i < 6; i++) {
UEDATX = report->keys[i];
}
UEINTX = 0x3A;
SREG = intr_state;
if (!usb_configured()) return -1;
intr_state = SREG;
cli();
UENUM = KEYBOARD_ENDPOINT2;
timeout = UDFNUML + 50;
while (1) {
// are we ready to transmit?
if (UEINTX & (1<<RWAL)) break;
SREG = intr_state;
// has the USB gone offline?
if (!usb_configured()) return -1;
// have we waited too long?
if (UDFNUML == timeout) return -1;
// get ready to try checking again
intr_state = SREG;
cli();
UENUM = KEYBOARD_ENDPOINT2;
}
UEDATX = 0;
UEDATX = 0;
for (i = 6; i < 12; i++) {
UEDATX = report->keys[i];
}
UEINTX = 0x3A;
SREG = intr_state;
usb_keyboard_idle_count = 0;
report->is_sent =true;
usb_keyboard_print_report(report);
return 0;
}
void usb_keyboard_swap_report(void) {
usb_keyboard_report_t *tmp = usb_keyboard_report_prev;
usb_keyboard_report_prev = usb_keyboard_report;
usb_keyboard_report = tmp;
}
void usb_keyboard_clear_report(void) {
usb_keyboard_clear_keys();
usb_keyboard_clear_mods();
usb_keyboard_report->is_sent = false;
}
void usb_keyboard_clear_keys(void) {
for (int i = 0; i < KEYBOARD_REPORT_MAX; i++) usb_keyboard_report->keys[i] = 0;
}
void usb_keyboard_clear_mods(void)
{
usb_keyboard_report->mods = 0;
}
void usb_keyboard_add_code(uint8_t code)
{
if (IS_MOD(code)) {
usb_keyboard_add_mod(code);
} else {
usb_keyboard_add_key(code);
}
}
void usb_keyboard_add_key(uint8_t code)
{
for (int i = 0; i < KEYBOARD_REPORT_MAX; i++) {
if (!usb_keyboard_report->keys[i]) {
usb_keyboard_report->keys[i] = code;
return;
}
}
}
void usb_keyboard_set_keys(uint8_t *keys)
{
for (int i = 0; i < KEYBOARD_REPORT_MAX; i++)
usb_keyboard_report->keys[i] = keys[i];
}
void usb_keyboard_set_mods(uint8_t mods)
{
usb_keyboard_report->mods = mods;
}
void usb_keyboard_add_mod(uint8_t code)
{
usb_keyboard_report->mods |= MOD_BIT(code);
}
void usb_keyboard_del_code(uint8_t code)
{
if (IS_MOD(code)) {
usb_keyboard_del_mod(code);
} else {
usb_keyboard_del_key(code);
}
}
void usb_keyboard_del_key(uint8_t code)
{
for (int i = 0; i < KEYBOARD_REPORT_MAX; i++) {
if (usb_keyboard_report->keys[i] == code) {
usb_keyboard_report->keys[i] = KB_NO;
return;
}
}
}
void usb_keyboard_del_mod(uint8_t code)
{
usb_keyboard_report->mods &= ~MOD_BIT(code);
}
bool usb_keyboard_is_sent(void)
{
return usb_keyboard_report->is_sent;
}
bool usb_keyboard_has_key(void)
{
uint8_t keys = 0;
for (int i = 0; i < KEYBOARD_REPORT_MAX; i++) keys |= usb_keyboard_report->keys[i];
return keys ? true : false;
}
bool usb_keyboard_has_mod(void)
{
return usb_keyboard_report->mods ? true : false;
}
void usb_keyboard_print_report(usb_keyboard_report_t *report)
{
if (!debug_keyboard) return;
print("keys: ");
for (int i = 0; i < KEYBOARD_REPORT_MAX; i++) { phex(report->keys[i]); print(" "); }
print(" mods: "); phex(report->mods); print("\n");
}
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