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Use a fixed RSSI percentage range.

Based on a bit of sciencing around what I thought would be good range, I
came up with some values to constrain "0-100%" with for translation to
ppm values.

http://i.imgur.com/X42wxL1.png
Dustin Sallings hace 9 años
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commit
bca6174156
Se han modificado 1 ficheros con 15 adiciones y 19 borrados
  1. 15
    19
      frsky_arduino_rx_complete.ino

+ 15
- 19
frsky_arduino_rx_complete.ino Ver fichero

@@ -13,6 +13,7 @@
13 13
 #include <EEPROM.h>
14 14
 #include "iface_cc2500.h"
15 15
 //#define DEBUG
16
+//#define DEBUG_RSSI
16 17
 //#define DEBUG0
17 18
 //#define DEBUG1
18 19
 //#define DEBUG2
@@ -30,8 +31,9 @@
30 31
 
31 32
 // Used for RSSI_OVER_PPM
32 33
 int rssi;
33
-int rssi_min = -114;
34
-int rssi_max = -79;
34
+const int rssi_offset = 71;
35
+const int rssi_min = -103;
36
+const int rssi_max = -96;
35 37
 
36 38
 #define chanel_number 8  //set the number of chanels
37 39
 #define SEEK_CHANSKIP   13
@@ -192,26 +194,20 @@ void setup()
192 194
 
193 195
 void updateRSSI() {
194 196
 #if defined(RSSI_OVER_PPM)
195
-    rssi = cc2500_readReg(CC2500_34_RSSI | CC2500_READ_BURST);
196
-    if (rssi < 128) {
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-        rssi = ((rssi / 2) - 74) & 0x7f;
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+    int rssi_dec = cc2500_readReg(CC2500_34_RSSI | CC2500_READ_BURST);
198
+    if (rssi_dec < 128) {
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+        rssi = ((rssi_dec / 2) - rssi_offset) & 0x7f;
198 200
     } else {
199
-        rssi = (((rssi - 256) / 2)) - 74;
200
-    }
201
-    int old_rssi_min = rssi_min;
202
-    int old_rssi_max = rssi_max;
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-    rssi_min = min(rssi_min, rssi);
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-    rssi_max = max(rssi_max, rssi);
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-  #if defined(DEBUG)
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-    if (rssi_min != old_rssi_min || rssi_max != old_rssi_max) {
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-        Serial.print("RSSI: ");
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-        Serial.print(rssi);
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-        Serial.print(", min=");
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-        Serial.print(rssi_min);
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-        Serial.print(", max=");
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-        Serial.println(rssi_max);
201
+        rssi = (((rssi_dec - 256) / 2)) - rssi_offset;
213 202
     }
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+
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+  #if defined(DEBUG_RSSI2)
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+    Serial.print(millis());
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+    Serial.print("\t");
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+    Serial.println(rssi);
214 208
   #endif
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+
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+    rssi = constrain(rssi, rssi_min, rssi_max);
215 211
 #endif
216 212
 }
217 213
 

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