Sparky: Add beeper

docs/Board - Sparky.md

@@ -176,6 +176,13 @@ USB VCP *can* be used at the same time as other serial ports (unlike Naze32).
 
 All USART ports all support automatic hardware inversion which allows direct connection of serial rx receivers like the FrSky X4RSB - no external inverter needed.
 
+# Beeper Connection
+
+| Pin  | Signal | Function        |
+| ---- | ------ | --------------- |
+| PWM10| PA1    | Beeper Signal   |
+
+Output signal to connect a buzzer. Please note this singal can not drive the buzzer, but it must be used to drive for exmaple the gate of a small N-Channel MOSFET, drain connected to the - pin of the buzzer and source to GND. + pin of the buzzer can be conneted to +5 Volts (or even to your Lipo + if the buzzer supports the voltage).
 
 # Battery Monitoring Connections
 

src/main/target/SPARKY/target.h

@@ -26,6 +26,12 @@
 #define LED1_PIN    Pin_5  // Green (Rev 1) / Red (Rev 2) - PB5
 #define LED1_PERIPHERAL RCC_AHBPeriph_GPIOB
 
+#define BEEP_GPIO   GPIOA  //USE PWM10 as beeper signal
+#define BEEP_PIN    Pin_1
+#define BEEP_PERIPHERAL RCC_AHBPeriph_GPIOA
+#define BEEPER_INVERTED
+#define BEEPER
+
 #define USABLE_TIMER_CHANNEL_COUNT 11
 
 // MPU6050 interrupts