lm4f/uart: Implemented a function to get the current databits setting for a UART

include/libopencm3/lm4f/uart.h

@@ -444,6 +444,7 @@ BEGIN_DECLS
 
 void uart_set_baudrate(uint32_t uart, uint32_t baud);
 void uart_set_databits(uint32_t uart, uint8_t databits);
+uint8_t uart_get_databits(uint32_t uart);
 void uart_set_stopbits(uint32_t uart, uint8_t stopbits);
 void uart_set_parity(uint32_t uart, enum uart_parity parity);
 void uart_set_mode(uint32_t uart, uint32_t mode);

lib/lm4f/uart.c

@@ -151,6 +151,12 @@ void uart_set_databits(uint32_t uart, uint8_t databits)
 	UART_LCRH(uart) = reg32;
 }
 
+uint8_t uart_get_databits(uint32_t uart)
+{
+	const uint8_t bits = (UART_LCRH(uart) & UART_LCRH_WLEN_MASK) >> 5;
+	return bits + 5;
+}
+
 /**
  * \brief Set UART stopbits
  *