AP_SerialManager: remove set_console_baud, factor out find_protocol_instance

libraries/AP_SerialManager/AP_SerialManager.cpp

@@ -276,10 +276,8 @@ void AP_SerialManager::init()
     }
 }
 
-// find_serial - searches available serial ports for the first instance that allows the given protocol
+
-//  instance should be zero if searching for the first instance, 1 for the second, etc
+const AP_SerialManager::UARTState *AP_SerialManager::find_protocol_instance(enum SerialProtocol protocol, uint8_t instance) const
-//  returns uart on success, nullptr if a serial port cannot be found
-AP_HAL::UARTDriver *AP_SerialManager::find_serial(enum SerialProtocol protocol, uint8_t instance) const
 {
     uint8_t found_instance = 0;
 
@@ -287,7 +285,7 @@ AP_HAL::UARTDriver *AP_SerialManager::find_serial(enum SerialProtocol protocol,
     for(uint8_t i=0; i<SERIALMANAGER_NUM_PORTS; i++) {
         if (protocol_match(protocol, (enum SerialProtocol)state[i].protocol.get())) {
             if (found_instance == instance) {
-                return state[i].uart;
+                return &state[i];
             }
             found_instance++;
         }
@@ -297,25 +295,28 @@ AP_HAL::UARTDriver *AP_SerialManager::find_serial(enum SerialProtocol protocol,
     return nullptr;
 }
 
+// find_serial - searches available serial ports for the first instance that allows the given protocol
+//  instance should be zero if searching for the first instance, 1 for the second, etc
+//  returns uart on success, nullptr if a serial port cannot be found
+AP_HAL::UARTDriver *AP_SerialManager::find_serial(enum SerialProtocol protocol, uint8_t instance) const
+{
+    const struct UARTState *_state = find_protocol_instance(protocol, instance);
+    if (_state == nullptr) {
+        return nullptr;
+    }
+    return _state->uart;
+}
+
 // find_baudrate - searches available serial ports for the first instance that allows the given protocol
 //  instance should be zero if searching for the first instance, 1 for the second, etc
 //  returns baudrate on success, 0 if a serial port cannot be found
 uint32_t AP_SerialManager::find_baudrate(enum SerialProtocol protocol, uint8_t instance) const
 {
-    uint8_t found_instance = 0;
+    const struct UARTState *_state = find_protocol_instance(protocol, instance);
-
+    if (_state == nullptr) {
-    // search for matching protocol
+        return 0;
-    for(uint8_t i=0; i<SERIALMANAGER_NUM_PORTS; i++) {
-        if (protocol_match(protocol, (enum SerialProtocol)state[i].protocol.get())) {
-            if (found_instance == instance) {
-                return map_baudrate(state[i].baud);
-            }
-            found_instance++;
-        }
     }
-
+    return _state->baud;
-    // if we got this far we did not find the uart
-    return 0;
 }
 
 // get_mavlink_channel - provides the mavlink channel associated with a given protocol
@@ -364,24 +365,6 @@ void AP_SerialManager::set_blocking_writes_all(bool blocking)
     }
 }
 
-// set_console_baud - sets the console's baud rate to the rate specified by the protocol
-void AP_SerialManager::set_console_baud(enum SerialProtocol protocol, uint8_t instance) const
-{
-    uint8_t found_instance = 0;
-
-    // find baud rate of this protocol
-    for (uint8_t i=0; i<SERIALMANAGER_NUM_PORTS; i++) {
-        if (protocol_match(protocol, (enum SerialProtocol)state[i].protocol.get())) {
-            if (instance == found_instance) {
-                // set console's baud rate
-                state[0].uart->begin(map_baudrate(state[i].baud));
-                return;
-            }
-            found_instance++;
-        }
-    }
-}
-
 /*
  *  map from a 16 bit EEPROM baud rate to a real baud rate.
  *  For PX4 we can do 1.5MBit, although 921600 is more reliable.

libraries/AP_SerialManager/AP_SerialManager.h

@@ -136,9 +136,6 @@ public:
     // set_blocking_writes_all - sets block_writes on or off for all serial channels
     void set_blocking_writes_all(bool blocking);
 
-    // set_console_baud - sets the console's baud rate to the rate specified by the protocol
-    void set_console_baud(enum SerialProtocol protocol, uint8_t instance) const;
-
     // parameter var table
     static const struct AP_Param::GroupInfo var_info[];
 
@@ -146,12 +143,17 @@ private:
     static AP_SerialManager *_instance;
     
     // array of uart info
-    struct {
+    struct UARTState {
         AP_Int8 protocol;
         AP_Int32 baud;
         AP_HAL::UARTDriver* uart;
     } state[SERIALMANAGER_NUM_PORTS];
 
+    // search through managed serial connections looking for the
+    // instance-nth UART which is running protocol protocol
+    const UARTState *find_protocol_instance(enum SerialProtocol protocol,
+                                      uint8_t instance) const;
+
     uint32_t map_baudrate(int32_t rate) const;
 
     // protocol_match - returns true if the protocols match