revise Fn key processing.

usb_keyboard.c

@@ -1,52 +1,40 @@
 #include <avr/interrupt.h>
 #include <avr/pgmspace.h>
+#include "usb_keycodes.h"
 #include "usb_keyboard.h"
 #include "print.h"
 #include "debug.h"
 
 
-static bool is_sent = false;
-
-// which modifier keys are currently pressed
-// 1=left ctrl,    2=left shift,   4=left alt,    8=left gui
-// 16=right ctrl, 32=right shift, 64=right alt, 128=right gui
-uint8_t keyboard_modifier_keys=0;
-
-// which keys are currently pressed, up to 6 keys may be down at once
-uint8_t keyboard_keys[6]={0,0,0,0,0,0};
+// keyboard report.
+static usb_keyboard_report_t _report0 = { {0,0,0,0,0,0}, 0 };
+static usb_keyboard_report_t _report1 = { {0,0,0,0,0,0}, 0 };
+usb_keyboard_report_t *usb_keyboard_report = &_report0;
+usb_keyboard_report_t *usb_keyboard_report_back = &_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 keyboard_protocol=1;
+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 keyboard_idle_config=125;
+uint8_t usb_keyboard_idle_config=125;
 
 // count until idle timeout
-uint8_t keyboard_idle_count=0;
+uint8_t usb_keyboard_idle_count=0;
 
 // 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
-volatile uint8_t keyboard_leds=0;
+volatile uint8_t usb_keyboard_leds=0;
 
 
-// perform a single keystroke
-int8_t usb_keyboard_press(uint8_t key, uint8_t modifier)
+int8_t usb_keyboard_send(void)
 {
-	int8_t r;
-
-	keyboard_modifier_keys = modifier;
-	keyboard_keys[0] = key;
-	r = usb_keyboard_send();
-	if (r) return r;
-	keyboard_modifier_keys = 0;
-	keyboard_keys[0] = 0;
-	return usb_keyboard_send();
+    return usb_keyboard_send_report(usb_keyboard_report);
 }
 
-// send the contents of keyboard_keys and keyboard_modifier_keys
-int8_t usb_keyboard_send(void)
+
+int8_t usb_keyboard_send_report(usb_keyboard_report_t *report)
 {
 	uint8_t i, intr_state, timeout;
 
@@ -68,54 +56,122 @@ int8_t usb_keyboard_send(void)
 		cli();
 		UENUM = KEYBOARD_ENDPOINT;
 	}
-	UEDATX = keyboard_modifier_keys;
+	UEDATX = report->mods;
 	UEDATX = 0;
 	for (i=0; i<6; i++) {
-		UEDATX = keyboard_keys[i];
+		UEDATX = report->keys[i];
 	}
 	UEINTX = 0x3A;
-	keyboard_idle_count = 0;
+	usb_keyboard_idle_count = 0;
 	SREG = intr_state;
-        is_sent = true;
+
+        report->is_sent =true;
+
+        usb_keyboard_print_report(report);
 	return 0;
 }
 
-void usb_keyboard_init(void) {
-    usb_keyboard_clear();
-    is_sent = false;
+void usb_keyboard_swap_report(void) {
+    usb_keyboard_report_t *tmp = usb_keyboard_report_back;
+    usb_keyboard_report_back = usb_keyboard_report;
+    usb_keyboard_report = tmp;
 }
 
-void usb_keyboard_clear(void) {
-    usb_keyboard_clear_key();
-    usb_keyboard_clear_mod();
+void usb_keyboard_clear_report(void) {
+    usb_keyboard_clear_keys();
+    usb_keyboard_clear_mods();
+    usb_keyboard_report->is_sent = false;
 }
 
-void usb_keyboard_clear_key(void) {
-    for (int i = 0; i < 6; i++) keyboard_keys[i] = 0;
+void usb_keyboard_clear_keys(void) {
+    for (int i = 0; i < 6; i++) usb_keyboard_report->keys[i] = 0;
 }
 
-void usb_keyboard_clear_mod(void) {
-    keyboard_modifier_keys = 0;
+void usb_keyboard_clear_mods(void)
+{
+    usb_keyboard_report->mods = 0;
 }
 
-bool usb_keyboard_is_sent(void) {
-    return is_sent;
+void usb_keyboard_add_code(uint8_t code)
+{
+    if (IS_MOD(code)) {
+        usb_keyboard_add_mod(code);
+    } else {
+        usb_keyboard_add_key(code);
+    }
 }
 
-bool usb_keyboard_has_key(void) {
+void usb_keyboard_add_key(uint8_t code)
+{
+    for (int i = 0; i < 6; i++) {
+        if (!usb_keyboard_report->keys[i]) {
+            usb_keyboard_report->keys[i] = code;
+            return;
+        }
+    }
+}
+
+void usb_keyboard_set_keys(uint8_t keys[6])
+{
+    for (int i = 0; i < 6; 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 < 6; 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 < 6; i++) keys |= keyboard_keys[i];
+    for (int i = 0; i < 6; i++) keys |= usb_keyboard_report->keys[i];
     return keys ? true : false;
 }
 
-bool usb_keyboard_has_mod(void) {
-    return keyboard_modifier_keys ? true : false;
+bool usb_keyboard_has_mod(void)
+{
+    return usb_keyboard_report->mods ? true : false;
 }
 
-void usb_keyboard_print(void) {
+void usb_keyboard_print_report(usb_keyboard_report_t *report)
+{
     if (!debug_keyboard) return;
-    print("\nkeys: ");
-    for (int i = 0; i < 6; i++) { phex(keyboard_keys[i]); print(" "); }
-    print("\n");
-    print("mods: "); phex(keyboard_modifier_keys); print("\n");
+    print("keys: ");
+    for (int i = 0; i < 6; i++) { phex(report->keys[i]); print(" "); }
+    print(" mods: "); phex(report->mods); print("\n");
 }