Merge pull request stm32duino#456 from makarenya/receive_double_buffering_for_f1

Receive double buffering for STM32F1xx

Author: fpistm

Diff for: cores/arduino/stm32/usb/cdc/usbd_cdc.c

@@ -651,9 +651,9 @@ static uint8_t  USBD_CDC_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum)
   USBD_CDC_ItfTypeDef *ctrl = (USBD_CDC_ItfTypeDef *)pdev->pUserData;
 
   if (pdev->pClassData != NULL) {
-    if ((pdev->ep_in[epnum].total_length > 0U) && ((pdev->ep_in[epnum].total_length % hpcd->IN_ep[epnum].maxpacket) == 0U)) {
+    if ((hcdc->TxLastLength > 0U) && ((hcdc->TxLastLength % hpcd->IN_ep[epnum].maxpacket) == 0U)) {
       /* Update the packet total length */
-      pdev->ep_in[epnum].total_length = 0U;
+      hcdc->TxLastLength = 0U;
 
       /* Send ZLP */
       USBD_LL_Transmit(pdev, epnum, NULL, 0U);
@@ -835,7 +835,7 @@ uint8_t  USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev)
       hcdc->TxState = 1U;
 
       /* Update the packet total length */
-      pdev->ep_in[CDC_IN_EP & 0xFU].total_length = hcdc->TxLength;
+      hcdc->TxLastLength = hcdc->TxLength;
 
       /* Transmit next packet */
       USBD_LL_Transmit(pdev, CDC_IN_EP, hcdc->TxBuffer,

Diff for: cores/arduino/stm32/usb/cdc/usbd_cdc.h

@@ -41,9 +41,9 @@ extern "C" {
 /** @defgroup usbd_cdc_Exported_Defines
   * @{
   */
-#define CDC_IN_EP                                   0x81U  /* EP1 for data IN */
+#define CDC_IN_EP                                   0x82U  /* EP1 for data IN */
 #define CDC_OUT_EP                                  0x01U  /* EP1 for data OUT */
-#define CDC_CMD_EP                                  0x82U  /* EP2 for CDC commands */
+#define CDC_CMD_EP                                  0x83U  /* EP2 for CDC commands */
 
 #ifndef CDC_HS_BINTERVAL
 #define CDC_HS_BINTERVAL                          0x10U
@@ -115,6 +115,7 @@ typedef struct {
   uint8_t  *TxBuffer;
   uint32_t RxLength;
   uint32_t TxLength;
+  uint32_t TxLastLength;
 
   __IO uint32_t TxState;
   __IO uint32_t RxState;

Diff for: cores/arduino/stm32/usb/usbd_conf.c

@@ -28,10 +28,12 @@
 /* Private typedef -----------------------------------------------------------*/
 /* Private define ------------------------------------------------------------*/
 /* Size in words, byte size divided by 2 */
-#define PMA_EP0_OUT_ADDR (8 * 3)
+#define PMA_EP0_OUT_ADDR (8 * 4)
 #define PMA_EP0_IN_ADDR (PMA_EP0_OUT_ADDR + USB_MAX_EP0_SIZE)
-#define PMA_CDC_OUT_ADDR (PMA_EP0_IN_ADDR + USB_MAX_EP0_SIZE)
-#define PMA_CDC_IN_ADDR (PMA_CDC_OUT_ADDR + USB_FS_MAX_PACKET_SIZE)
+#define PMA_CDC_OUT_BASE (PMA_EP0_IN_ADDR + USB_MAX_EP0_SIZE)
+#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 + USB_FS_MAX_PACKET_SIZE)
 /* Private macro -------------------------------------------------------------*/
 /* Private variables ---------------------------------------------------------*/
@@ -520,9 +522,9 @@ USBD_StatusTypeDef USBD_LL_Init(USBD_HandleTypeDef *pdev)
 #else
   HAL_PCDEx_PMAConfig(&g_hpcd, 0x00, PCD_SNG_BUF, PMA_EP0_OUT_ADDR);
   HAL_PCDEx_PMAConfig(&g_hpcd, 0x80, PCD_SNG_BUF, PMA_EP0_IN_ADDR);
-  HAL_PCDEx_PMAConfig(&g_hpcd, 0x01, PCD_SNG_BUF, PMA_CDC_OUT_ADDR);
-  HAL_PCDEx_PMAConfig(&g_hpcd, 0x81, PCD_SNG_BUF, PMA_CDC_IN_ADDR);
-  HAL_PCDEx_PMAConfig(&g_hpcd, 0x82, PCD_SNG_BUF, PMA_CDC_CMD_ADDR);
+  HAL_PCDEx_PMAConfig(&g_hpcd, 0x01, PCD_DBL_BUF, PMA_CDC_OUT_ADDR);
+  HAL_PCDEx_PMAConfig(&g_hpcd, 0x82, PCD_SNG_BUF, PMA_CDC_IN_ADDR);
+  HAL_PCDEx_PMAConfig(&g_hpcd, 0x83, PCD_SNG_BUF, PMA_CDC_CMD_ADDR);
 #endif
 #endif /* USE_USB_HS */
   return USBD_OK;

Diff for: system/Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_ll_usb.h

@@ -160,6 +160,9 @@ typedef struct
   uint32_t  xfer_len;       /*!< Current transfer length                                                  */
 
   uint32_t  xfer_count;     /*!< Partial transfer length in case of multi packet transfer                 */
+
+  uint16_t  pending0;        /*!, Fact, that double buffering transfer have pended data                    */
+  uint16_t  pending1;        /*!, Fact, that double buffering transfer have pended data                    */
 }USB_OTG_EPTypeDef;
 
 typedef struct
@@ -269,20 +272,24 @@ typedef struct
 
   uint8_t   doublebuffer;    /*!< Double buffer enable
                                  This parameter can be 0 or 1                                             */
-  
-  uint16_t  tx_fifo_num;    /*!< This parameter is not required by USB Device FS peripheral, it is used 
+
+  uint16_t  tx_fifo_num;    /*!< This parameter is not required by USB Device FS peripheral, it is used
                                  only by USB OTG FS peripheral    
                                  This parameter is added to ensure compatibility across USB peripherals   */
 
   uint32_t  maxpacket;      /*!< Endpoint Max packet size
                                  This parameter must be a number between Min_Data = 0 and Max_Data = 64KB */
 
   uint8_t   *xfer_buff;     /*!< Pointer to transfer buffer                                               */
-  
+
+
   uint32_t  xfer_len;       /*!< Current transfer length                                                  */
 
   uint32_t  xfer_count;     /*!< Partial transfer length in case of multi packet transfer                 */
 
+  uint16_t  pending0;        /*!, Fact, that double buffering transfer have pended data                    */
+  uint16_t  pending1;        /*!, Fact, that double buffering transfer have pended data                    */
+
 } USB_EPTypeDef;
 #endif /* USB */
 /**