Signal strength meter for FM radio - FS#8151 by Przemysław Hołubowski

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28559 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 17 insertions, 0 deletions

diff --git a/firmware/drivers/tuner/tea5760uk.c b/firmware/drivers/tuner/tea5760uk.c
index 20234e28ed..c1dff598b3 100644
--- a/firmware/drivers/tuner/tea5760uk.c
+++ b/firmware/drivers/tuner/tea5760uk.c
@@ -30,6 +30,10 @@
 
 #define I2C_ADR 0x22
 
+/* define RSSI range */
+#define RSSI_MIN 4
+#define RSSI_MAX 46
+
 static bool tuner_present = false;
 static unsigned char write_bytes[7] = {
     0x00,   /* INTREG LSB */
@@ -138,6 +142,19 @@ int tea5760_get(int setting)
         case RADIO_STEREO:
             val = read_bytes[9] >> 2;
             break;
+            
+        case RADIO_RSSI:
+            val = (read_bytes[9] >> 4) & 0x0F;
+            val = 4 + (28 * val + 5) / 10;
+            break;
+
+        case RADIO_RSSI_MIN:
+            val = RSSI_MIN;
+            break;
+
+        case RADIO_RSSI_MAX:
+            val = RSSI_MAX;
+            break;
     }
 
     return val;