Enable Uart 2 stop bit capabilities

The T-LC and the new beta boards T3.6 and soon T3.5 hardware uarts have
ability to turn on 2 stop bits.  So enabled on these boards.

teensy3/HardwareSerial.h

 #define SERIAL_9E1_RXINV_TXINV 0xBE
 #define SERIAL_9O1_RXINV_TXINV 0xBF
 #endif
+// Teensy LC and 3.5 and 3.6 Uarts have 1/2 bit stop setting
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__) || defined(KINETISL)
+#define SERIAL_2STOP_BITS 0x100
+#define SERIAL_8E2 (SERIAL_8E1 | SERIAL_2STOP_BITS)
+#define SERIAL_8O2 (SERIAL_8O1 | SERIAL_2STOP_BITS)
+#define SERIAL_8E2_RXINV (SERIAL_8E1_RXINV | SERIAL_2STOP_BITS)
+#define SERIAL_8O2_RXINV (SERIAL_8O1_RXINV | SERIAL_2STOP_BITS)
+#define SERIAL_8E2_TXINV (SERIAL_8E1_TXINV | SERIAL_2STOP_BITS)
+#define SERIAL_8O2_TXINV (SERIAL_8O1_TXINV | SERIAL_2STOP_BITS)
+#define SERIAL_8E2_RXINV_TXINV (SERIAL_8E1_RXINV_TXINV | SERIAL_2STOP_BITS)
+#define SERIAL_8O2_RXINV_TXINV (SERIAL_8O1_RXINV_TXINV | SERIAL_2STOP_BITS)
+#endif
 // bit0: parity, 0=even, 1=odd
 // bit1: parity, 0=disable, 1=enable
 // bit2: mode, 1=9bit, 0=8bit

teensy3/kinetis.h

 } KINETISK_UART_t;
 #define KINETISK_UART0		(*(KINETISK_UART_t *)0x4006A000)
 #define UART0_BDH		(KINETISK_UART0.BDH)		// UART Baud Rate Registers: High
+#define UART_BDH_SBNS		0x20			// UART Stop Bit Number Select (TLC T3.5 T3.6)
 #define UART0_BDL		(KINETISK_UART0.BDL)		// UART Baud Rate Registers: Low
 #define UART0_C1		(KINETISK_UART0.C1)		// UART Control Register 1
 #define UART_C1_LOOPS		0x80			//  When LOOPS is set, the RxD pin is disconnected from the UART and the transmitter output is internally connected to the receiver input
 #define UART_C1_UARTSWAI	0x40			//  UART Stops in Wait Mode
 #define UART_C1_RSRC		0x20			//  When LOOPS is set, the RSRC field determines the source for the receiver shift register input
-#define UART_C1_M		0x10			//  9-bit or 8-bit Mode Select
+#define UART_C1_M			0x10			//  9-bit or 8-bit Mode Select
 #define UART_C1_WAKE		0x08			//  Determines which condition wakes the UART
 #define UART_C1_ILT		0x04			//  Idle Line Type Select
 #define UART_C1_PE		0x02			//  Parity Enable
 #define LPUART_BAUD_TDMAE		((uint32_t)0x00800000)		// Transmitter Dma Enable
 #define LPUART_BAUD_RDMAE		((uint32_t)0x00400000)		// Receiver Dma Enable
 #define LPUART_BAUD_BOTHEDGE	((uint32_t)0x00020000)		// Both edge sampling needed OSR 4-7
+#define LPUART_BAUD_SBNS		((uint32_t)0x00002000)		// UART Stop Bit Number Select 
 #define LPUART_BAUD_SBR(n)		((uint32_t)((n) & 0x1fff) << 0) // set baud rate divisor
 
 #define LPUART0_STAT		(KINETISK_LPUART0.STAT)		// LPUART Status register

teensy3/serial1.c

 	UART0_C4 = c;
 	use9Bits = format & 0x80;
 #endif
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__) || defined(KINETISL)
+	// For T3.5/T3.6/TLC See about turning on 2 stop bit mode
+	if ( format & 0x100) {
+		uint8_t bdl = UART0_BDL;
+		UART0_BDH |= UART_BDH_SBNS;		// Turn on 2 stop bits - was turned off by set baud
+		UART0_BDL = bdl;		// Says BDH not acted on until BDL is written
+	}
+#endif
 }
 
 void serial_end(void)

teensy3/serial2.c

 	UART1_C4 = c;
 	use9Bits = format & 0x80;
 #endif
-	// UART1_C1.0 = parity, 0=even, 1=odd
-	// UART1_C1.1 = parity, 0=disable, 1=enable
-	// UART1_C1.4 = mode, 1=9bit, 0=8bit
-	// UART1_C4.5 = mode, 1=10bit, 0=8bit
-	// UART1_C3.4 = txinv, 0=normal, 1=inverted
-	// UART1_S2.4 = rxinv, 0=normal, 1=inverted
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__) || defined(KINETISL)
+	// For T3.5/T3.6/TLC See about turning on 2 stop bit mode
+	if ( format & 0x100) {
+		uint8_t bdl = UART1_BDL;
+		UART1_BDH |= UART_BDH_SBNS;		// Turn on 2 stop bits - was turned off by set baud
+		UART1_BDL = bdl;		// Says BDH not acted on until BDL is written
+	}
+#endif
 }
 
 void serial2_end(void)

teensy3/serial3.c

 	UART2_C4 = c;
 	use9Bits = format & 0x80;
 #endif
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__) || defined(KINETISL)
+	// For T3.5/T3.6/TLC See about turning on 2 stop bit mode
+	if ( format & 0x100) {
+		uint8_t bdl = UART2_BDL;
+		UART2_BDH |= UART_BDH_SBNS;		// Turn on 2 stop bits - was turned off by set baud
+		UART2_BDL = bdl;		// Says BDH not acted on until BDL is written
+	}
+#endif
+
 }
 
 void serial3_end(void)

teensy3/serial4.c

 	UART3_C4 = c;
 	use9Bits = format & 0x80;
 #endif
+#if defined(__MK64FX512__) || defined(__MK66FX1M0__) || defined(KINETISL)
+	// For T3.5/T3.6/TLC See about turning on 2 stop bit mode
+	if ( format & 0x100) {
+		uint8_t bdl = UART3_BDL;
+		UART3_BDH |= UART_BDH_SBNS;		// Turn on 2 stop bits - was turned off by set baud
+		UART3_BDL = bdl;		// Says BDH not acted on until BDL is written
+	}
+#endif
 }
 
 void serial4_end(void)

teensy3/serial5.c

 	UART4_C4 = c;
 	use9Bits = format & 0x80;
 #endif
+	// For T3.5/T3.6 See about turning on 2 stop bit mode
+	if ( format & 0x100) {
+		uint8_t bdl = UART4_BDL;
+		UART4_BDH |= UART_BDH_SBNS;		// Turn on 2 stop bits - was turned off by set baud
+		UART4_BDL = bdl;		// Says BDH not acted on until BDL is written
+	}
 }
 
 void serial5_end(void)

teensy3/serial6.c

 	UART5_C4 = c;
 	use9Bits = format & 0x80;
 #endif
+	// For T3.5 See about turning on 2 stop bit mode
+	if ( format & 0x100) {
+		uint8_t bdl = UART5_BDL;
+		UART5_BDH |= UART_BDH_SBNS;		// Turn on 2 stop bits - was turned off by set baud
+		UART5_BDL = bdl;		// Says BDH not acted on until BDL is written
+	}
 }
 
 void serial6_end(void)

teensy3/serial6_lpuart.c

 	if (format & 0x20) c |= LPUART_CTRL_TXINV;		// tx invert
 	LPUART0_CTRL = c;
 
+	// For T3.6 See about turning on 2 stop bit mode
+	if ( format & 0x100) LPUART0_BAUD |= LPUART_BAUD_SBNS;	
 }
 
 void serial6_end(void)