+#include "stm32_flash.h"
+
+#if CPU_CM3_STM32F103RB
+ #define GPIO_USART1_TX_PIN BV(9)
+ #define GPIO_USART1_RX_PIN BV(10)
+ #define GPIO_USART2_TX_PIN BV(2)
+ #define GPIO_USART2_RX_PIN BV(3)
+ #define GPIO_USART3_TX_PIN BV(10)
+ #define GPIO_USART3_RX_PIN BV(11)
+#else
+ #error No USART pins are defined for select cpu
+#endif