diff --git a/f1/usart/src/usart1.c b/f1/usart/src/usart1.c
index 8f8f8ab68f67bafc7e0e269ac7b7388653c92125..2284366a2ade504e68fc779b1d2b2e2a3ea33786 100644
--- a/f1/usart/src/usart1.c
+++ b/f1/usart/src/usart1.c
@@ -5,13 +5,13 @@
 #define     USART_IRQn               USART1_IRQn
 #define     USART_IRQHandler         USART1_IRQHandler
 
-#define     USART_TX_PIN             GPIO_PIN_6 
-#define     USART_TX_GPIO_PORT       GPIOB
-#define     USART_ENABLE_TX_GPIO_CLK __HAL_RCC_GPIOB_CLK_ENABLE()
+#define     USART_TX_PIN             GPIO_PIN_9 
+#define     USART_TX_GPIO_PORT       GPIOA
+#define     USART_ENABLE_TX_GPIO_CLK __HAL_RCC_GPIOA_CLK_ENABLE()
 
-#define     USART_RX_PIN             GPIO_PIN_7
-#define     USART_RX_GPIO_PORT       GPIOB
-#define     USART_ENABLE_RX_GPIO_CLK __HAL_RCC_GPIOB_CLK_ENABLE()
+#define     USART_RX_PIN             GPIO_PIN_10
+#define     USART_RX_GPIO_PORT       GPIOA
+#define     USART_ENABLE_RX_GPIO_CLK __HAL_RCC_GPIOA_CLK_ENABLE()
 
 /* DMA configuration */
 #define     USART_DMA                DMA1