added protocol stack: pjrc, vusb

1 files changed, 253 insertions, 0 deletions

diff --git a/pjrc/usb_keyboard.c b/pjrc/usb_keyboard.c
new file mode 100644
index 0000000000..57e23d5fce
--- /dev/null
+++ b/pjrc/usb_keyboard.c
@@ -0,0 +1,253 @@
+#include <avr/interrupt.h>
+#include <avr/pgmspace.h>
+#include "usb_keycodes.h"
+#include "usb_keyboard.h"
+#include "print.h"
+#include "debug.h"
+#include "util.h"
+
+
+// keyboard report.
+static usb_keyboard_report_t _report0 = { {0}, 0, false };
+static usb_keyboard_report_t _report1 = { {0}, 0, false };
+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;
+
+// enable USB NKRO
+bool usb_keyboard_nkro = false;
+
+
+int8_t usb_keyboard_send(void)
+{
+    return usb_keyboard_send_report(usb_keyboard_report);
+}
+
+static inline int8_t _send_report(usb_keyboard_report_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end);
+int8_t usb_keyboard_send_report(usb_keyboard_report_t *report)
+{
+    int8_t result = 0;
+
+#ifdef USB_NKRO_ENABLE
+    if (usb_keyboard_nkro)
+        result = _send_report(report, KBD2_ENDPOINT, 0, KBD2_REPORT_KEYS);
+    else
+#endif
+    {
+        if (usb_keyboard_protocol)
+            result = _send_report(report, KBD_ENDPOINT, 0, KBD_REPORT_KEYS);
+        else
+            result = _send_report(report, KBD_ENDPOINT, 0, 6);
+    }
+
+    if (result) return result;
+    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 < KEYS_MAX; i++) usb_keyboard_report->keys[i] = 0;
+}
+
+void usb_keyboard_clear_mods(void)
+{
+    usb_keyboard_report->mods = 0;
+}
+
+void usb_keyboard_set_keys(uint8_t *keys)
+{
+    for (int i = 0; i < KEYS_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_code(uint8_t code)
+{
+    if (IS_MOD(code)) {
+        usb_keyboard_add_mod(code);
+    } else {
+        usb_keyboard_add_key(code);
+    }
+}
+
+static inline void _add_key_byte(uint8_t code);
+static inline void _add_key_bit(uint8_t code);
+void usb_keyboard_add_key(uint8_t code)
+{
+#ifdef USB_NKRO_ENABLE
+    if (usb_keyboard_nkro) {
+        _add_key_bit(code);
+        return;
+    }
+#endif
+    _add_key_byte(code);
+}
+
+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)
+{
+#ifdef USB_NKRO_ENABLE
+    if ((code>>3) < KEYS_MAX) {
+        usb_keyboard_keys[code>>3] &= ~(1<<(code&7));
+    }
+#else
+    for (int i = 0; i < KEYS_MAX; i++) {
+        if (usb_keyboard_report->keys[i] == code) {
+            usb_keyboard_report->keys[i] = KB_NO;
+            return;
+        }
+    }
+#endif
+}
+
+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 < KEYS_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;
+}
+
+uint8_t usb_keyboard_get_key(void)
+{
+#ifdef USB_NKRO_ENABLE
+    if (usb_keyboard_nkro) {
+        uint8_t i = 0;
+        for (; i < KEYS_MAX && !usb_keyboard_keys[i]; i++);
+        return i<<3 | biton(usb_keyboard_keys[i]);
+    }
+#endif
+    return usb_keyboard_keys[0];
+}
+
+void usb_keyboard_print_report(usb_keyboard_report_t *report)
+{
+    if (!debug_keyboard) return;
+    print("keys: ");
+    for (int i = 0; i < KEYS_MAX; i++) { phex(report->keys[i]); print(" "); }
+    print(" mods: "); phex(report->mods); print("\n");
+}
+
+
+static inline int8_t _send_report(usb_keyboard_report_t *report, uint8_t endpoint, uint8_t keys_start, uint8_t keys_end)
+{
+    uint8_t intr_state, timeout;
+
+    if (!usb_configured()) return -1;
+    intr_state = SREG;
+    cli();
+    UENUM = 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 = endpoint;
+    }
+    UEDATX = report->mods;
+    if (!usb_keyboard_nkro)
+        UEDATX = 0;
+    for (uint8_t i = keys_start; i < keys_end; i++) {
+            UEDATX = report->keys[i];
+    }
+    UEINTX = 0x3A;
+    SREG = intr_state;
+    return 0;
+}
+
+static inline void _add_key_byte(uint8_t code)
+{
+    // TODO: fix ugly code
+    int8_t i = 0;
+    int8_t empty = -1;
+    for (; i < KEYS_MAX; i++) {
+        if (usb_keyboard_keys_prev[i] == code) {
+            usb_keyboard_keys[i] = code;
+            break;
+        }
+        if (empty == -1 &&
+                usb_keyboard_keys_prev[i] == 0 &&
+                usb_keyboard_keys[i] == 0) {
+            empty = i;
+        }
+    }
+    if (i == KEYS_MAX) {
+        if (empty != -1) {
+            usb_keyboard_keys[empty] = code;
+        }
+    }
+}
+
+static inline void _add_key_bit(uint8_t code)
+{
+    if ((code>>3) < KEYS_MAX) {
+        usb_keyboard_keys[code>>3] |= 1<<(code&7);
+    }
+}
+