altos: Create macros to convert from/to radio RSSI representation

[fw/altos] / src / core / ao.h

diff --git a/src/core/ao.h b/src/core/ao.h
index 06daf48f98aa4af597bfe0a7344c6c665f7cdaf8..eb2d47cf063d68e62cc41bdbce3af40c1b095d00 100644 (file)
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -487,6 +487,12 @@ struct ao_telemetry_tiny_recv {
        uint8_t                         status;
 };
 
+/* Unfortunately, we've exposed the CC1111 rssi units as the 'usual' method
+ * for reporting RSSI. So, now we use these values everywhere
+ */
+#define AO_RSSI_FROM_RADIO(radio)      ((int16_t) ((int8_t) (radio) >> 1) - 74)
+#define AO_RADIO_FROM_RSSI(rssi)       (((int8_t) (rssi) + 74) << 1)
+
 /*
  * ao_radio_recv tacks on rssi and status bytes
  */