diff --git a/irmp.c b/irmp.c
index 150d69f..f95410b 100644
--- a/irmp.c
+++ b/irmp.c
@@ -2189,6 +2189,15 @@ irmp_init (void)
 #  endif
     GPIO_Init(IRMP_PORT, &GPIO_InitStructure);
 
+#elif defined (ARM_OPENCM3)                                             // STM32 with libopencm3
+
+    /* GPIOx clock enable */
+    rcc_periph_clock_enable(IRMP_PORT_RCC);
+
+    /* GPIO Configuration */
+	 gpio_set_mode(IRMP_PORT, GPIO_MODE_INPUT,
+         GPIO_CNF_INPUT_FLOAT, 1<<IRMP_BIT);
+
 #elif defined(STELLARIS_ARM_CORTEX_M4)
     // Enable the GPIO port
     ROM_SysCtlPeripheralEnable(IRMP_PORT_PERIPH);
diff --git a/irmp.h b/irmp.h
index ded7e80..53e16c7 100644
--- a/irmp.h
+++ b/irmp.h
@@ -63,6 +63,17 @@
 #    warning The STM32 port of IRMP uses the ST standard peripheral drivers which are not enabled in your build configuration.
 #  endif
 
+#elif defined (ARM_OPENCM3)
+#  define _CONCAT(a,b)                          a##b
+#  define CONCAT(a,b)                           _CONCAT(a,b)
+#  define IRMP_PORT                             CONCAT(GPIO, IRMP_PORT_LETTER)
+#  define IRMP_PORT_RCC                       	CONCAT(RCC_GPIO, IRMP_PORT_LETTER)
+
+#  define IRMP_BIT                              IRMP_BIT_NUMBER
+#  define IRMP_PIN                              IRMP_PORT   // for use with input(x) below
+#  define input(x)                              ((GPIO_IDR(IRMP_PORT) & (1<<IRMP_BIT)) != 0)
+//#  define input(x)                              (BBIO_PERIPH(IRMP_PORT+IDR, IRMP_BIT))
+
 #elif defined (STELLARIS_ARM_CORTEX_M4)
 #  define _CONCAT(a,b)                          a##b
 #  define CONCAT(a,b)                           _CONCAT(a,b)
diff --git a/irmpconfig.h b/irmpconfig.h
index 245129f..75d9834 100644
--- a/irmpconfig.h
+++ b/irmpconfig.h
@@ -137,6 +137,14 @@
 #  define IRMP_BIT_NUMBER                       13
 
 /*---------------------------------------------------------------------------------------------------------------------------------------------------
+ * Change hardware pin here for ARM STM32 with libopencm3
+ *---------------------------------------------------------------------------------------------------------------------------------------------------
+ */
+#elif defined (ARM_OPENCM3)                                             // use C13 as IR input on STM32
+#  define IRMP_PORT_LETTER                      C
+#  define IRMP_BIT_NUMBER                       13
+
+/*---------------------------------------------------------------------------------------------------------------------------------------------------
  * Change hardware pin here for Stellaris ARM Cortex M4
  *---------------------------------------------------------------------------------------------------------------------------------------------------
  */
diff --git a/irmpsystem.h b/irmpsystem.h
index 25bacb2..e1fbc97 100644
--- a/irmpsystem.h
+++ b/irmpsystem.h
@@ -26,6 +26,9 @@
 #  define PIC_C18
 #elif defined(__PCM__) || defined(__PCB__) || defined(__PCH__)                      // CCS PIC compiler
 #  define PIC_CCS
+#elif defined(STM32F1)                                                              // ARM STM32 with libopencm3
+#  define ARM_OPENCM3
+#  define F_CPU (SysCtlClockGet())
 #elif defined(STM32L1XX_MD) || defined(STM32L1XX_MDP) || defined(STM32L1XX_HD)      // ARM STM32
 #  include <stm32l1xx.h>
 #  define ARM_STM32
@@ -133,6 +136,15 @@ typedef unsigned short                  uint16_t;
 #  define PROGMEM
 #  define memcpy_P                      memcpy
 
+#elif defined(ARM_OPENCM3)
+
+#  include <libopencm3/cm3/nvic.h>
+#  include <libopencm3/stm32/rcc.h>
+#  include <libopencm3/stm32/gpio.h>
+#  include <libopencm3/stm32/timer.h>
+#  define PROGMEM
+#  define memcpy_P                      memcpy
+
 #elif defined(SDCC_STM8)
 
 #  include "stm8s.h"