add flysky rx indicating led (#5476)

* add flysky rx indicating led

add flysky rx indicating led

* add Conditional compilation directives

add Conditional compilation directives

* rewrite some code

rewrite some code and add some definitions/defines according to comments

* delete extra whitespace

src/main/rx/flysky.c

@@ -117,6 +117,9 @@ static bool waitTx = false;
 static uint16_t errorRate = 0;
 static uint16_t rssi_dBm = 0;
 static uint8_t rfChannelMap[FLYSKY_FREQUENCY_COUNT] = {0};
+#ifdef USE_RX_FLYSKY_SPI_LED
+static IO_t flySkyLedPin;
+#endif /* USE_RX_FLYSKY_SPI_LED */
 
 
 static uint8_t getNextChannel (uint8_t step)
@@ -360,6 +363,12 @@ bool flySkyInit (const struct rxConfig_s *rxConfig, struct rxRuntimeConfig_s *rx
     IO_t bindPin = IOGetByTag(IO_TAG(BINDPLUG_PIN));
     IOInit(bindPin, OWNER_RX_BIND, 0);
     IOConfigGPIO(bindPin, IOCFG_IPU);
+#ifdef USE_RX_FLYSKY_SPI_LED	
+    flySkyLedPin = IOGetByTag(IO_TAG(RX_FLYSKY_SPI_LED_PIN));
+    IOInit(flySkyLedPin, OWNER_LED, 0); 
+    IOConfigGPIO(flySkyLedPin, IOCFG_OUT_PP);
+    IOLo(flySkyLedPin);
+#endif /* USE_RX_FLYSKY_SPI_LED */
 
     uint8_t startRxChannel;
 
@@ -413,6 +422,11 @@ void flySkySetRcDataFromPayload (uint16_t *rcData, const uint8_t *payload)
 
 rx_spi_received_e flySkyDataReceived (uint8_t *payload)
 {
+#ifdef USE_RX_FLYSKY_SPI_LED
+    static uint16_t rxLossCount = 0;
+    static timeMs_t ledLastUpdate = 0;
+    static bool ledOn = false;
+#endif /* USE_RX_FLYSKY_SPI_LED */
     rx_spi_received_e result = RX_SPI_RECEIVED_NONE;
     uint32_t timeStamp;
 
@@ -442,6 +456,27 @@ rx_spi_received_e flySkyDataReceived (uint8_t *payload)
 
     if (bound) {
         checkTimeout();
+#ifdef USE_RX_FLYSKY_SPI_LED
+        if (result == RX_SPI_RECEIVED_DATA) {
+            rxLossCount = 0;
+            IOHi(flySkyLedPin);
+        } else {
+            if (rxLossCount  < RX_LOSS_COUNT) {
+                rxLossCount++;      
+            } else {
+                timeMs_t now = millis();
+                if (now - ledLastUpdate > INTERVAL_RX_LOSS_MS) {
+                    ledLastUpdate = now;
+                    if (ledOn) {
+                        IOLo(flySkyLedPin);
+                    } else {
+                        IOHi(flySkyLedPin);
+                    }
+                    ledOn = !ledOn;
+                }
+            }
+        }
+#endif /* USE_RX_FLYSKY_SPI_LED */
     } else {
         if ((micros() - timeLastBind) > BIND_TIMEOUT && rfChannelMap[0] != 0 && txId != 0) {
             result = RX_SPI_RECEIVED_BIND;
@@ -451,6 +486,18 @@ rx_spi_received_e flySkyDataReceived (uint8_t *payload)
             flySkyConfigMutable()->protocol = protocol;
             writeEEPROM();
         }
+#ifdef USE_RX_FLYSKY_SPI_LED
+        timeMs_t now = millis();
+        if (now - ledLastUpdate > INTERVAL_RX_BIND_MS) {
+            ledLastUpdate = now;
+            if (ledOn) {
+                IOLo(flySkyLedPin);
+            } else {
+                IOHi(flySkyLedPin);
+            }
+                ledOn = !ledOn;
+        }
+#endif /* USE_RX_FLYSKY_SPI_LED */
     }
 
     return result;

src/main/rx/flysky_defs.h

@@ -39,6 +39,9 @@
 
 #define TX_DELAY        500
 #define BIND_TIMEOUT    200000
+#define INTERVAL_RX_LOSS_MS 1000
+#define INTERVAL_RX_BIND_MS 250
+#define RX_LOSS_COUNT   1000
 
 typedef struct __attribute__((packed)) {
     uint8_t type;