Enable double buffered mode in USB

FreeRTOSConfig.h

@@ -109,6 +109,7 @@ extern uint32_t SystemCoreClock;
 #define configQUEUE_REGISTRY_SIZE                0
 #define configCHECK_FOR_STACK_OVERFLOW           2
 #define configENABLE_BACKWARD_COMPATIBILITY      0
+#define configUSE_COUNTING_SEMAPHORES            0
 
 #define configUSE_TIMERS                         0
 #define configTIMER_TASK_PRIORITY                TSK_TIMERS_PRIO // above normal

TinyFrame/TF_Integration.c

@@ -29,10 +29,10 @@ void TF_WriteImpl(TinyFrame *tf, const uint8_t *buff, uint32_t len)
         const uint16_t chunksize = (uint16_t) MIN(total, CHUNK);
 
         // this is an attempt to speed it up a little by removing a couple levels of indirection
-        assert_param(HAL_OK == HAL_PCD_EP_Transmit(hUsbDeviceFS.pData, CDC_IN_EP, (uint8_t *) buff, chunksize));
+//        assert_param(HAL_OK == HAL_PCD_EP_Transmit(hUsbDeviceFS.pData, CDC_IN_EP, (uint8_t *) buff, chunksize));
 
 //        USBD_LL_Transmit(&hUsbDeviceFS, CDC_IN_EP, (uint8_t *) buff, chunksize);
-//        assert_param(USBD_OK == CDC_Transmit_FS((uint8_t *) buff, chunksize));
+        assert_param(USBD_OK == CDC_Transmit_FS((uint8_t *) buff, chunksize));
 
         buff += chunksize;
         total -= chunksize;

USB/usbd_cdc_if.c

@@ -313,6 +313,8 @@ void USBD_CDC_TransmitDone(USBD_HandleTypeDef *pdev)
   assert_param(semVcomTxReadyHandle != NULL);
   assert_param(inIRQ());
 
+  if (uxSemaphoreGetCount(semVcomTxReadyHandle) == 1) return;
+
   portBASE_TYPE taskWoken = pdFALSE;
   assert_param(xSemaphoreGiveFromISR(semVcomTxReadyHandle, &taskWoken) == pdTRUE);
   portYIELD_FROM_ISR(taskWoken);

USB/usbd_conf.c

@@ -397,8 +397,16 @@ USBD_StatusTypeDef  USBD_LL_Init (USBD_HandleTypeDef *pdev)
   HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , MSC_EPOUT_ADDR , PCD_SNG_BUF, ptr += 64); // 64
 
   // CDC endpoints, EP2 two-way and EP3 in-only
-  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_IN_EP , PCD_SNG_BUF, ptr += 64); // 64
+    uint32_t buf1addr, buf2addr;
-  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_OUT_EP , PCD_SNG_BUF, ptr += 64); // 64
+
+    buf1addr = (ptr += 64);
+    buf2addr = (ptr += 64);
+  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_IN_EP , PCD_DBL_BUF, buf1addr | (buf2addr << 16)); // 64
+
+    buf1addr = (ptr += 64);
+    buf2addr = (ptr += 64);
+  HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_OUT_EP , PCD_DBL_BUF, buf1addr | (buf2addr << 16)); // 64
+
   HAL_PCDEx_PMAConfig((PCD_HandleTypeDef*)pdev->pData , CDC_CMD_EP , PCD_SNG_BUF, ptr += 16); // 16
   (void)ptr;
 #endif

USB/usbd_conf.h

@@ -99,7 +99,7 @@
 
 #define CDC_CUSTOM_EPS
 #define CDC_IN_EP                    0x82  /* EP1 for data IN */
-#define CDC_OUT_EP                   0x02  /* EP1 for data OUT */
+#define CDC_OUT_EP                   0x04  /* EP1 for data OUT */
 #define CDC_CMD_EP                   0x83  /* EP2 for CDC commands */
 
 /** @defgroup USBD_Exported_Macros

freertos.c

@@ -169,7 +169,7 @@ void MX_FREERTOS_Init(void) {
 
   /* USER CODE BEGIN RTOS_SEMAPHORES */
   /* add semaphores, ... */
-  xSemaphoreGive(semVcomTxReadyHandle);
+  assert_param(pdTRUE == xSemaphoreGive(semVcomTxReadyHandle));
   /* USER CODE END RTOS_SEMAPHORES */
 
   /* USER CODE BEGIN RTOS_TIMERS */

platform/plat_compat.h

@@ -21,7 +21,7 @@
 #endif
 
 // 180 is normally enough if not doing extensive debug logging
-#define TSK_STACK_MSG       220 // TF message handler task stack size (all unit commands run on this thread)
+#define TSK_STACK_MSG       260 // TF message handler task stack size (all unit commands run on this thread)
 #define TSK_STACK_IDLE    64 //configMINIMAL_STACK_SIZE
 #define TSK_STACK_TIMERS  64 //configTIMER_TASK_STACK_DEPTH