fix(usb): use non-overlapping C5 CDC PMA buffers

Author: cumin777

libraries/USBDevice/inc/usbd_ep_conf.h

@@ -69,10 +69,21 @@ typedef struct {
 
 #ifdef USBD_USE_CDC
 #define PMA_CDC_OUT_BASE    (PMA_EP0_IN_ADDR + USB_MAX_EP0_SIZE)
+#if defined(STM32C5xx)
+/*
+ * The C5 USB DRD FS peripheral is used with bulk double buffering disabled.
+ * Keep each CDC endpoint in its own 64-byte PMA area; in particular, the
+ * interrupt IN endpoint must not overlap the bulk IN data buffer.
+ */
+#define PMA_CDC_OUT_ADDR    PMA_CDC_OUT_BASE
+#define PMA_CDC_IN_ADDR     (PMA_CDC_OUT_BASE + USB_FS_MAX_PACKET_SIZE)
+#define PMA_CDC_CMD_ADDR    (PMA_CDC_IN_ADDR + USB_FS_MAX_PACKET_SIZE)
+#else
 #define PMA_CDC_OUT_ADDR    ((PMA_CDC_OUT_BASE + USB_FS_MAX_PACKET_SIZE) | \
                             (PMA_CDC_OUT_BASE << 16U))
 #define PMA_CDC_IN_ADDR     (PMA_CDC_OUT_BASE + USB_FS_MAX_PACKET_SIZE * 2)
 #define PMA_CDC_CMD_ADDR    (PMA_CDC_IN_ADDR + CDC_CMD_PACKET_SIZE)
+#endif
 #endif /* USBD_USE_CDC */
 #ifdef USBD_USE_HID_COMPOSITE
   #define PMA_MOUSE_IN_ADDR   (PMA_EP0_IN_ADDR + HID_MOUSE_EPIN_SIZE)
@@ -86,4 +97,4 @@ extern const ep_desc_t ep_def[DEV_NUM_EP + 1];
 #endif /* USBCON */
 #endif /* __USBD_EP_CONF_H */
 
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

libraries/USBDevice/src/usbd_ep_conf.c

@@ -37,7 +37,7 @@ const ep_desc_t ep_def[] = {
 #else
   {0x00,       PMA_EP0_OUT_ADDR, PCD_SNG_BUF},
   {0x80,       PMA_EP0_IN_ADDR,  PCD_SNG_BUF},
-#ifndef USBD_CDC_USE_SINGLE_BUFFER
+#if !defined(STM32C5xx) && !defined(USBD_CDC_USE_SINGLE_BUFFER)
   {CDC_OUT_EP, PMA_CDC_OUT_ADDR, PCD_DBL_BUF},
 #else
   {CDC_OUT_EP, PMA_CDC_OUT_ADDR, PCD_SNG_BUF},
@@ -72,4 +72,3 @@ const ep_desc_t ep_def[] = {
 
 #endif /* HAL_PCD_MODULE_ENABLED && USBCON */
 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
-