Fix rn42.h API

keyboard/hhkb_rn42/main.c

@@ -45,9 +45,6 @@ static void SetupHardware(void)
     PORTD |= (1<<0);
     DDRD &= ~(1<<1);
     PORTD |= (1<<1);
-
-    // CTS control
-    CTS_INIT();
 }
 
 static bool force_usb = false;
@@ -75,7 +72,7 @@ int main(void)
     /* init modules */
     keyboard_init();
 
-    if (rn42_ready()) {
+    if (!rn42_rts()) {
         host_set_driver(&rn42_driver);
     } else {
         host_set_driver(&lufa_driver);
@@ -112,9 +109,9 @@ int main(void)
         if (config_mode) {
             while ((c = serial_recv2()) != -1) {
                 // without flow control it'll fail to receive data when flooded
-                CTS_HI();
+                rn42_cts_hi();
                 xprintf("%c", c);
-                CTS_LO();
+                rn42_cts_lo();
             }
         } else {
             while ((c = serial_recv2()) != -1) {
@@ -148,10 +145,10 @@ int main(void)
 
         /* Bluetooth mode when ready */
         if (!config_mode && !force_usb) {
-            if (rn42_ready() && host_get_driver() != &rn42_driver) {
+            if (!rn42_rts() && host_get_driver() != &rn42_driver) {
                 clear_keyboard();
                 host_set_driver(&rn42_driver);
-            } else if (!rn42_ready() && host_get_driver() != &lufa_driver) {
+            } else if (rn42_rts() && host_get_driver() != &lufa_driver) {
                 clear_keyboard();
                 host_set_driver(&lufa_driver);
             }
@@ -159,7 +156,10 @@ int main(void)
     }
 }
 
-static bool local_echo = false;
+
+/******************************************************************************
+ * Command
+ ******************************************************************************/
 bool command_extra(uint8_t code)
 {
     static host_driver_t *prev_driver = &rn42_driver;
@@ -167,46 +167,37 @@ bool command_extra(uint8_t code)
         case KC_H:
         case KC_SLASH: /* ? */
             print("\n\n----- Bluetooth RN-42 Help -----\n");
-            print("w:   toggle RN-42 config mode(enter/exit)\n");
+            print("Del: auto_connect/disconnect(enter/exit config mode)\n");
-            print("l:   toggle print module output(local echo)\n");
+            print("i:   RN-42 info\n");
-            print("a:   Bluetooth auto connect\n");
-            print("del: Bluetooth disconnect\n");
-            print("i:   info\n");
             print("b:   battery voltage\n");
 
             if (config_mode) {
                 return true;
             } else {
-                print("u:   force USB mode\n");
+                print("u:   Force USB mode\n");
                 return false;   // to display default command help
             }
-        case KC_W:
+        case KC_DELETE:
-            if (!config_mode) {
+            if (rn42_autoconnecting()) {
-                print("\nEnter RN-42 config mode\n");
+                rn42_disconnect();
-                print("type $$$ to enter RN-42 command mode\n");
+                print("\nRN-42: disconnect\n");
-                print("type Delete to disconnect Bluetooth connection\n");
+                print("Enter config mode\n");
+                print("type $$$ to start and + for local echo\n");
                 command_state = CONSOLE;
                 config_mode = true;
                 prev_driver = host_get_driver();
                 clear_keyboard();
-                host_set_driver(&rn42_config_driver);
+                host_set_driver(&rn42_config_driver);   // null driver; not to send a key to host
             } else {
-                print("\nExit RN-42 config mode\n");
+                rn42_autoconnect();
+                print("\nRN-42: auto_connect\n");
+                print("Exit config mode\n");
                 command_state = ONESHOT;
                 config_mode = false;
                 clear_keyboard();
                 host_set_driver(prev_driver);
             }
             return true;
-        case KC_L:
-            if (local_echo) {
-                print("local echo off\n");
-                local_echo = false;
-            } else {
-                print("local echo on\n");
-                local_echo = true;
-            }
-            return true;
         case KC_U:
             if (config_mode) return false;
             if (force_usb) {
@@ -219,20 +210,12 @@ bool command_extra(uint8_t code)
                 host_set_driver(&lufa_driver);
             }
             return true;
-        case KC_A:
-            print("auto connect\n");
-            rn42_autoconnect();
-            return true;
-        case KC_DELETE:
-            print("disconnect\n");
-            rn42_disconnect();
-            //rn42_putc('\0');    // see 5.3.4.4 DISCONNECT KEY of User's Guide
-            return true;
         case KC_I:
-            print("\nRN-42 info\n");
+            print("\n----- RN-42 info -----\n");
             xprintf("protocol: %s\n", (host_get_driver() == &rn42_driver) ? "RN-42" : "LUFA");
             xprintf("force_usb: %X\n", force_usb);
-            xprintf("rn42_ready(): %X\n", rn42_ready());
+            xprintf("rn42_autoconnecting(): %X\n", rn42_autoconnecting());
+            xprintf("rn42_rts(): %X\n", rn42_rts());
             xprintf("config_mode: %X\n", config_mode);
             return true;
         case KC_B:
@@ -266,7 +249,6 @@ bool command_console_extra(uint8_t code)
     switch (code) {
         default:
             rn42_putc(code2asc(code));
-            if (local_echo) xprintf("%c", code2asc(code));
             return true;
     }
     return false;

keyboard/hhkb_rn42/rn42.c

@@ -24,17 +24,17 @@ host_driver_t rn42_driver = {
 
 void rn42_init(void)
 {
-    // PF1: check RTS(active low)
-    DDRF &= ~(1<<1);
-    PORTF &= ~(1<<1);
-
     // PF7: BT connection control(HiZ: connect, low: disconnect)
     // JTAG disable for PORT F. write JTD bit twice within four cycles.
     MCUCR |= (1<<JTD);
     MCUCR |= (1<<JTD);
     rn42_autoconnect();
 
-    // PD5: CTS    (low: allow to send, high:not allowed)
+    // PF1: RTS(low: allowed to send, high: not allowed)
+    DDRF &= ~(1<<1);
+    PORTF &= ~(1<<1);
+
+    // PD5: CTS(low: allow to send, high:not allow)
     DDRD |= (1<<5);
     PORTD &= ~(1<<5);
 
@@ -46,22 +46,43 @@ void rn42_putc(uint8_t c)
     serial_send(c);
 }
 
+bool rn42_autoconnecting(void)
+{
+    // GPIO6 for control connection(high: auto connect, low: disconnect)
+    // Note that this needs config: SM,4(Auto-Connect DTR Mode)
+    return (PORTF & (1<<7) ? true : false);
+}
+
 void rn42_autoconnect(void)
 {
-    DDRF &= ~(1<<7);
+    // hi to auto connect
-    PORTF &= ~(1<<7);
+    DDRF |= (1<<7);
+    PORTF |= (1<<7);
 }
 
 void rn42_disconnect(void)
 {
+    // low to disconnect
     DDRF |= (1<<7);
     PORTF &= ~(1<<7);
 }
 
-bool rn42_ready(void)
+bool rn42_rts(void)
+{
+    // low when RN-42 is powered and ready to receive
+    return PINF&(1<<1);
+}
+
+void rn42_cts_hi(void)
 {
-    // RTS low
+    // not allow to send
-    return PINF&(1<<1) ? false : true;
+    PORTD |= (1<<5);
+}
+
+void rn42_cts_lo(void)
+{
+    // allow to send
+    PORTD &= ~(1<<5);
 }
 
 

keyboard/hhkb_rn42/rn42.h

@@ -3,18 +3,16 @@
 
 #include <stdbool.h>
 
-// RN-42 CTS pin
-#define CTS_INIT()  (DDRD  |=  (1<<5))
-#define CTS_HI()    (PORTD |=  (1<<5))
-#define CTS_LO()    (PORTD &= ~(1<<5))
-
 host_driver_t rn42_driver;
 host_driver_t rn42_config_driver;
 
 void rn42_init(void);
 void rn42_putc(uint8_t c);
+bool rn42_autoconnecting(void);
 void rn42_autoconnect(void);
 void rn42_disconnect(void);
-bool rn42_ready(void);
+bool rn42_rts(void);
+void rn42_cts_hi(void);
+void rn42_cts_lo(void);
 
 #endif