Changed the pins of the non-rempad serial port for the F1 family.

(cherry picked from commit 59c30a4e)

f1/usart/src/usart1.c

@@ -6,13 +6,13 @@
 #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