diff --git a/src/drivers/uart/util.c b/src/drivers/uart/util.c
index c7b9ab2..d38f688 100644
--- a/src/drivers/uart/util.c
+++ b/src/drivers/uart/util.c
@@ -13,6 +13,8 @@
 
 #include <console/console.h>
 #include <console/uart.h>
+#include <types.h>
+#include <timer.h>
 
 /* Calculate divisor. Do not floor but round to nearest integer. */
 unsigned int uart_baudrate_divisor(unsigned int baudrate,
@@ -53,3 +55,30 @@
 	return 115200 * 16;
 }
 #endif
+
+/* Helper function to allow bitbanging an 8n1 UART. */
+void uart_bitbang_tx_byte(unsigned char data, void (*set_tx)(int line_state))
+{
+	const int baud_rate = get_uart_baudrate();
+	int i;
+	struct stopwatch sw;
+	stopwatch_init(&sw);
+
+	/* Send start bit */
+	set_tx(0);
+	while (stopwatch_duration_usecs(&sw) < MHz / baud_rate)
+		stopwatch_tick(&sw);
+
+	/* 'i' counts the total bits sent at the end of the loop */
+	for (i = 2; i < 10; i++) {
+		set_tx(data & 1);
+		data >>= 1;
+		while (stopwatch_duration_usecs(&sw) < i * MHz / baud_rate)
+			stopwatch_tick(&sw);
+	}
+
+	/* Send stop bit */
+	set_tx(1);
+	while (stopwatch_duration_usecs(&sw) < i * MHz / baud_rate)
+		stopwatch_tick(&sw);
+}
diff --git a/src/include/console/uart.h b/src/include/console/uart.h
index 3bd390e..2e9c7b8 100644
--- a/src/include/console/uart.h
+++ b/src/include/console/uart.h
@@ -46,6 +46,9 @@
  */
 unsigned int uart_input_clock_divider(void);
 
+/* Bitbang out one byte on an 8n1 UART through the output function set_tx(). */
+void uart_bitbang_tx_byte(unsigned char data, void (*set_tx)(int line_state));
+
 void uart_init(int idx);
 void uart_tx_byte(int idx, unsigned char data);
 void uart_tx_flush(int idx);