fix 303, now works with usb

USB/usb_device.c

@@ -86,32 +86,33 @@ void MX_USB_DEVICE_Init(void)
 }
 
 /* USER CODE BEGIN USB_IRQ */
+
 /**
-* @brief This function handles USB low priority or CAN RX0 interrupts.
+ * Common USB handler
  */
+static void __attribute__((used)) BASE_USB_IRQHandler(void)
+{
+    HAL_PCD_IRQHandler(&hpcd_USB_FS);
+}
+
 
 // Function from F103
-void USB_LP_CAN1_RX0_IRQHandler(void) __attribute__((alias("USB_IRQHandler")));
+/**
+* @brief This function handles USB low priority or CAN RX0 interrupts.
+*/
+void USB_LP_CAN1_RX0_IRQHandler(void) __attribute__((alias("BASE_USB_IRQHandler")));
 
 // Function for F303
-void USB_LP_CAN_RX0_IRQHandler(void) __attribute__((alias("USB_IRQHandler")));
+/**
+* @brief This function handles USB low priority or CAN_RX0 interrupts.
+*/
+void USB_LP_CAN_RX0_IRQHandler(void) __attribute__((alias("BASE_USB_IRQHandler")));
 
+// Function for F072
 /**
 * @brief This function handles USB global interrupt / USB wake-up interrupt through EXTI line 18.
 */
-
-// Function from F072
-void USB_IRQHandler(void)
-{
-    /* USER CODE BEGIN USB_IRQn 0 */
-
-    /* USER CODE END USB_IRQn 0 */
-    HAL_PCD_IRQHandler(&hpcd_USB_FS);
-    /* USER CODE BEGIN USB_IRQn 1 */
-
-    /* USER CODE END USB_IRQn 1 */
-}
-
+void USB_IRQHandler(void) __attribute__((alias("BASE_USB_IRQHandler")));
 
 /**
   * @}

USB/usbd_conf.c

@@ -96,6 +96,8 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef* pcdHandle)
     PA12     ------> USB_DP
     */
     __HAL_RCC_GPIOA_CLK_ENABLE();
+    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_11, LL_GPIO_MODE_ALTERNATE);
+    LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_12, LL_GPIO_MODE_ALTERNATE);
     LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_11, LL_GPIO_AF_14);
     LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_12, LL_GPIO_AF_14);
     HAL_NVIC_SetPriority(USB_LP_CAN_RX0_IRQn, 5, 0);

platform/debug_uart.c

@@ -43,7 +43,10 @@ void DebugUart_PreInit(void)
 #elif GEX_PLAT_F103_BLUEPILL
     LL_USART_SetBaudRate(USART2, SystemCoreClock/2, 115200); // This is not great, let's hope it's like this on all platforms...
 #elif GEX_PLAT_F303_DISCOVERY
-    LL_USART_SetBaudRate(USART2, SystemCoreClock/2, LL_USART_OVERSAMPLING_16, 115200); // FIXME better way to determine frequency?
+    LL_USART_SetBaudRate(USART2,
+                         LL_RCC_GetUSARTClockFreq(LL_RCC_USART2_CLKSOURCE),
+                         LL_USART_OVERSAMPLING_16,
+                         115200);
     LL_GPIO_SetAFPin_0_7(GPIOA, LL_GPIO_PIN_2, LL_GPIO_AF_7); // uart2 is AF7 here
 #else
     #error "BAD PLATFORM!"