Automatic detection of FM radio hardware for V2 recorders

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4165 a1c6a512-1295-4272-9138-f99709370657

apps/recorder/radio.c

@@ -74,6 +74,18 @@ void radio_stop(void)
 
 }
 
+bool radio_hardware_present(void)
+{
+    int val;
+    
+    fmradio_set(2, 0x140885); /* 5kHz, 7.2MHz crystal, test mode 1 */
+    val = fmradio_read(0);
+    if(val == 0x140885)
+        return true;
+    else
+        return false;
+}
+
 void radio_set_frequency(int freq)
 {
     /* We add the standard Intermediate Frequency 10.7MHz before calculating

apps/recorder/radio.h

@@ -22,6 +22,7 @@
 #ifdef HAVE_FMRADIO
 bool radio_screen(void);
 void radio_stop(void);
+bool radio_hardware_present(void);
 
 struct fmstation
 {