diff --git a/lib/busvoodoo_rs232.c b/lib/busvoodoo_rs232.c
index b3bdb5c..7552d22 100644
--- a/lib/busvoodoo_rs232.c
+++ b/lib/busvoodoo_rs232.c
@@ -24,6 +24,7 @@
 #include <string.h> // string utilities
 
 /* STM32 (including CM3) libraries */
+#include <libopencm3/cm3/nvic.h> // interrupt utilities
 #include <libopencm3/stm32/gpio.h> // general purpose input output library
 #include <libopencm3/stm32/rcc.h> // real-time control clock library
 #include <libopencm3/stm32/usart.h> // USART utilities
@@ -43,6 +44,9 @@
 #define BUSVOODOO_RS232_USART 2 /**< USART peripheral */
 /** @} */
 
+#define BUSVOODOO_RS232_RX_TIMER 2 /**< timer ID to capture RX edges */
+#define BUSVOODOO_RS232_RX_CHANNEL 4 /**< channel ID used as input capture to capture RX edges */
+
 /** RS-232 specific methods that will be called by the generic methods */
 static const struct busvoodoo_uart_generic_specific_t busvoodoo_uart_generic_rs232 = {
 	.usart = USART(BUSVOODOO_RS232_USART),
@@ -66,6 +70,18 @@ static const struct busvoodoo_uart_generic_specific_t busvoodoo_uart_generic_rs2
 	.cts_port = USART_CTS_PORT(BUSVOODOO_RS232_USART),
 	.cts_pin = USART_CTS_PIN(BUSVOODOO_RS232_USART),
 	.cts_rcc = RCC_USART_PORT(BUSVOODOO_RS232_USART),
+	.timer = TIM(BUSVOODOO_RS232_RX_TIMER),
+	.timer_rcc = RCC_TIM(BUSVOODOO_RS232_RX_TIMER),
+	.timer_port = TIM_CH_PORT(BUSVOODOO_RS232_RX_TIMER, BUSVOODOO_RS232_RX_CHANNEL), 
+	.timer_port_rcc = RCC_TIM_CH(BUSVOODOO_RS232_RX_TIMER, BUSVOODOO_RS232_RX_CHANNEL), 
+	.timer_pin = TIM_CH_PIN(BUSVOODOO_RS232_RX_TIMER, BUSVOODOO_RS232_RX_CHANNEL),
+	.timer_ic = TIM_IC(BUSVOODOO_RS232_RX_CHANNEL),
+	.timer_ic_in_ti = TIM_IC_IN_TI(BUSVOODOO_RS232_RX_CHANNEL), 
+	.timer_sr_ccif = TIM_SR_CCIF(BUSVOODOO_RS232_RX_CHANNEL),
+	.timer_sr_ccof = TIM_SR_CCOF(BUSVOODOO_RS232_RX_CHANNEL),
+	.timer_ccr = &TIM_CCR(BUSVOODOO_RS232_RX_TIMER, BUSVOODOO_RS232_RX_CHANNEL),
+	.timer_dier_ccie = TIM_DIER_CCIE(BUSVOODOO_RS232_RX_CHANNEL),
+	.timer_nvic_irq = NVIC_TIM_IRQ(BUSVOODOO_RS232_RX_TIMER),
 };
 
 /** setup RS-232 mode