stm32/usbd: Introduce MICROPY_HW_USB_IS_MULTI_OTG to simplify USB config

This is an internal config value that is enabled for MCUs that have
multiple OTG instances, to simplify #if configuration of the USB code.

ports/stm32/mpconfigboard_common.h

@@ -287,6 +287,13 @@
 #define MICROPY_HW_MAX_CAN (1)
 #endif
 
+// Whether the USB peripheral is device-only, or multiple OTG
+#if defined(STM32L0) || defined(STM32WB)
+#define MICROPY_HW_USB_IS_MULTI_OTG (0)
+#else
+#define MICROPY_HW_USB_IS_MULTI_OTG (1)
+#endif
+
 // Configure maximum number of CDC VCP interfaces, and whether MSC/HID are supported
 #ifndef MICROPY_HW_USB_CDC_NUM
 #define MICROPY_HW_USB_CDC_NUM (1)

ports/stm32/usbd_cdc_interface.c

@@ -142,7 +142,7 @@ int8_t usbd_cdc_control(usbd_cdc_state_t *cdc_in, uint8_t cmd, uint8_t* pbuf, ui
                 // configure its serial port (in most cases to disable local echo)
                 cdc->connect_state = USBD_CDC_CONNECT_STATE_CONNECTING;
                 usbd_cdc_connect_tx_timer = 8; // wait for 8 SOF IRQs
-                #if defined(STM32L0) || defined(STM32WB)
+                #if !MICROPY_HW_USB_IS_MULTI_OTG
                 USB->CNTR |= USB_CNTR_SOFM;
                 #else
                 PCD_HandleTypeDef *hpcd = cdc->base.usbd->pdev->pData;
@@ -219,7 +219,7 @@ void HAL_PCD_SOFCallback(PCD_HandleTypeDef *hpcd) {
         --usbd_cdc_connect_tx_timer;
     } else {
         usbd_cdc_msc_hid_state_t *usbd = ((USBD_HandleTypeDef*)hpcd->pData)->pClassData;
-        #if defined(STM32L0) || defined(STM32WB)
+        #if !MICROPY_HW_USB_IS_MULTI_OTG
         USB->CNTR &= ~USB_CNTR_SOFM;
         #else
         hpcd->Instance->GINTMSK &= ~USB_OTG_GINTMSK_SOFM;

ports/stm32/usbd_conf.c

@@ -44,8 +44,8 @@ PCD_HandleTypeDef pcd_fs_handle;
 PCD_HandleTypeDef pcd_hs_handle;
 #endif
 
-#if defined(STM32L0) || defined(STM32WB)
-// The STM32L0xx has a single USB device-only instance
+#if !MICROPY_HW_USB_IS_MULTI_OTG
+// The MCU has a single USB device-only instance
 #define USB_OTG_FS USB
 #endif
 
@@ -92,7 +92,7 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd) {
         #endif
 
         // Enable USB FS Clocks
-        #if defined(STM32L0) || defined(STM32WB)
+        #if !MICROPY_HW_USB_IS_MULTI_OTG
         __HAL_RCC_USB_CLK_ENABLE();
         #else
         __USB_OTG_FS_CLK_ENABLE();
@@ -195,7 +195,7 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd) {
   * @retval None
   */
 void HAL_PCD_MspDeInit(PCD_HandleTypeDef *hpcd) {
-    #if defined(STM32L0) || defined(STM32WB)
+    #if !MICROPY_HW_USB_IS_MULTI_OTG
     __HAL_RCC_USB_CLK_DISABLE();
     #else
 
@@ -379,7 +379,7 @@ USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev, int high_speed) {
         pcd_fs_handle.Init.lpm_enable = DISABLE;
         pcd_fs_handle.Init.battery_charging_enable = DISABLE;
         #endif
-        #if !defined(STM32L0) && !defined(STM32WB)
+        #if MICROPY_HW_USB_IS_MULTI_OTG
         pcd_fs_handle.Init.use_dedicated_ep1 = 0;
         pcd_fs_handle.Init.dma_enable = 0;
         #if !defined(MICROPY_HW_USB_VBUS_DETECT_PIN)
@@ -396,7 +396,7 @@ USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev, int high_speed) {
         // Initialize LL Driver
         HAL_PCD_Init(&pcd_fs_handle);
 
-        #if defined(STM32L0) || defined(STM32WB)
+        #if !MICROPY_HW_USB_IS_MULTI_OTG
         // We have 512 16-bit words it total to use here (when using PCD_SNG_BUF)
         HAL_PCDEx_PMAConfig(&pcd_fs_handle, 0x00, PCD_SNG_BUF, 64); // EP0
         HAL_PCDEx_PMAConfig(&pcd_fs_handle, 0x80, PCD_SNG_BUF, 128); // EP0