add tusbd_cdc_is_busy

enhance cdc serial device demo
refractor fifo.c

demos/device/device_os_none/cdcd_app.c

@@ -39,6 +39,9 @@
 #include "cdcd_app.h"
 
 #if TUSB_CFG_DEVICE_CDC
+
+#include "common/fifo.h" // TODO refractor
+
 //--------------------------------------------------------------------+
 // INCLUDE
 //--------------------------------------------------------------------+
@@ -54,18 +57,16 @@ OSAL_SEM_DEF(cdcd_semaphore);
 
 static osal_semaphore_handle_t sem_hdl;
 
-static uint8_t cdcd_app_recv_buffer[CDCD_APP_BUFFER_SIZE] TUSB_CFG_ATTR_USBRAM;
+static uint8_t serial_rx_buffer[CDCD_APP_BUFFER_SIZE] TUSB_CFG_ATTR_USBRAM;
-static uint8_t cdcd_app_send_buffer[CDCD_APP_BUFFER_SIZE] TUSB_CFG_ATTR_USBRAM;
+static uint8_t serial_tx_buffer[CDCD_APP_BUFFER_SIZE] TUSB_CFG_ATTR_USBRAM;
-
-static uint16_t received_bytes; // set by transfer complete callback
 
 //--------------------------------------------------------------------+
 // INTERNAL OBJECT & FUNCTION DECLARATION
 //--------------------------------------------------------------------+
+FIFO_DEF(fifo_serial, CDCD_APP_BUFFER_SIZE, uint8_t, true);
 
 //--------------------------------------------------------------------+
 // IMPLEMENTATION
-//--------------------------------------------------------------------+
 void cdcd_serial_app_init(void)
 {
   sem_hdl = osal_semaphore_create( OSAL_SEM_REF(cdcd_semaphore) );
@@ -78,8 +79,7 @@ void tusbd_cdc_mounted_cb(uint8_t coreid)
 {
   osal_semaphore_reset(sem_hdl);
 
-  received_bytes = 0;
+  tusbd_cdc_receive(coreid, serial_rx_buffer, CDCD_APP_BUFFER_SIZE, true);
-  tusbd_cdc_receive(coreid, cdcd_app_recv_buffer, CDCD_APP_BUFFER_SIZE, true);
 }
 
 void tusbd_cdc_xfer_isr(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes)
@@ -90,7 +90,10 @@ void tusbd_cdc_xfer_isr(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id
       switch(event)
       {
         case TUSB_EVENT_XFER_COMPLETE:
-          received_bytes = min16_of(xferred_bytes, CDCD_APP_BUFFER_SIZE); // discard overflow bytes
+          for(uint8_t i=0; i<xferred_bytes; i++)
+          {
+            fifo_write(&fifo_serial, serial_rx_buffer+i);
+          }
           osal_semaphore_post(sem_hdl);  // notify main task
         break;
 
@@ -122,14 +125,23 @@ OSAL_TASK_FUNCTION( cdcd_serial_app_task ) (void* p_task_para)
 
   if ( tusbd_cdc_is_configured(0) )
   {
-    if ( received_bytes )
+    // echo back data in the fifo
-    { // echo back
+    if ( !tusbd_cdc_is_busy(0, CDC_PIPE_DATA_IN) )
-      memcpy(cdcd_app_send_buffer, cdcd_app_recv_buffer, received_bytes);
+    {
-      tusbd_cdc_send(0, cdcd_app_send_buffer, received_bytes, false);
+      uint16_t count=0;
-      received_bytes = 0;
+      while( fifo_read(&fifo_serial, &serial_tx_buffer[count]) )
+      {
+        count++;
       }
 
-    tusbd_cdc_receive(0, cdcd_app_recv_buffer, CDCD_APP_BUFFER_SIZE, true);
+      if (count)
+      {
+        tusbd_cdc_send(0, serial_tx_buffer, count, false);
+      }
+    }
+
+    // getting next data from host
+    tusbd_cdc_receive(0, serial_rx_buffer, CDCD_APP_BUFFER_SIZE, true);
   }
 
   OSAL_TASK_LOOP_END

demos/host/host_os_none/host_os_none.uvopt

@@ -448,7 +448,7 @@
 
   <Group>
     <GroupName>app</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -474,10 +474,10 @@
       <FileType>1</FileType>
       <tvExp>0</tvExp>
       <Focus>0</Focus>
-      <ColumnNumber>0</ColumnNumber>
+      <ColumnNumber>3</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
       <TopLine>1</TopLine>
-      <CurrentLine>1</CurrentLine>
+      <CurrentLine>2</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\src\cdc_serial_app.c</PathWithFileName>
       <FilenameWithoutPath>cdc_serial_app.c</FilenameWithoutPath>
@@ -736,7 +736,7 @@
 
   <Group>
     <GroupName>tinyusb</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -744,7 +744,7 @@
       <GroupNumber>3</GroupNumber>
       <FileNumber>18</FileNumber>
       <FileType>1</FileType>
-      <tvExp>0</tvExp>
+      <tvExp>1</tvExp>
       <Focus>0</Focus>
       <ColumnNumber>64</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
@@ -924,8 +924,8 @@
       <Focus>0</Focus>
       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>0</TopLine>
+      <TopLine>54</TopLine>
-      <CurrentLine>0</CurrentLine>
+      <CurrentLine>62</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\tinyusb\common\fifo.c</PathWithFileName>
       <FilenameWithoutPath>fifo.c</FilenameWithoutPath>
@@ -1156,7 +1156,7 @@
       <Focus>0</Focus>
       <ColumnNumber>0</ColumnNumber>
       <tvExpOptDlg>0</tvExpOptDlg>
-      <TopLine>1705</TopLine>
+      <TopLine>1688</TopLine>
       <CurrentLine>1713</CurrentLine>
       <bDave2>0</bDave2>
       <PathWithFileName>..\..\..\vendor\fatfs\ff.c</PathWithFileName>

demos/host/src/cdc_serial_app.c

@@ -92,7 +92,7 @@ void tusbh_cdc_xfer_isr(uint8_t dev_addr, tusb_event_t event, cdc_pipeid_t pipe_
           break;
 
         case TUSB_EVENT_XFER_ERROR:
-          xferred_bytes = 0; // ignore
+          received_bytes = 0; // ignore
           break;
 
         case TUSB_EVENT_XFER_STALLED:

tinyusb/class/cdc_device.c

@@ -74,7 +74,7 @@ static inline bool cdcd_is_configured(uint8_t coreid)
   return cdcd_data[coreid].interface_number != INTERFACE_INVALID_NUMBER;
 }
 
-tusb_error_t cdcd_xfer(uint8_t coreid,  cdc_pipeid_t pipeid, void * p_buffer, uint32_t length, bool is_notify)
+static tusb_error_t cdcd_xfer(uint8_t coreid,  cdc_pipeid_t pipeid, void * p_buffer, uint32_t length, bool is_notify)
 {
   ASSERT(cdcd_is_configured(coreid), TUSB_ERROR_USBD_INTERFACE_NOT_CONFIGURED);
 
@@ -88,13 +88,20 @@ tusb_error_t cdcd_xfer(uint8_t coreid,  cdc_pipeid_t pipeid, void * p_buffer, ui
 }
 
 //--------------------------------------------------------------------+
-// APPLICATION API
+// APPLICATION API (Parameters requires validation)
 //--------------------------------------------------------------------+
 bool tusbd_cdc_is_configured(uint8_t coreid)
 {
   return cdcd_is_configured(coreid);
 }
 
+bool tusbd_cdc_is_busy(uint8_t coreid, cdc_pipeid_t pipeid)
+{
+  ASSERT(cdcd_is_configured(coreid) && (pipeid < CDC_PIPE_ERROR), false);
+
+  return dcd_pipe_is_busy( cdcd_data[coreid].edpt_hdl[pipeid] );
+}
+
 tusb_error_t tusbd_cdc_receive(uint8_t coreid, void * p_buffer, uint32_t length, bool is_notify)
 {
   return cdcd_xfer(coreid, CDC_PIPE_DATA_OUT, p_buffer, length, is_notify);
@@ -208,7 +215,7 @@ tusb_error_t cdcd_control_request(uint8_t coreid, tusb_control_request_t const *
     case CDC_REQUEST_SET_LINE_CODING:
       dcd_pipe_control_xfer(coreid, p_request->bmRequestType_bit.direction,
                             &cdcd_line_coding[coreid], min16_of(sizeof(cdc_line_coding_t), p_request->wLength) );
-      // TODO notify application
+      // TODO notify application on xfer complete
     break;
 
     case CDC_REQUEST_SET_CONTROL_LINE_STATE: // TODO extract DTE present

tinyusb/class/cdc_device.h

@@ -58,6 +58,7 @@
 // APPLICATION API
 //--------------------------------------------------------------------+
 bool tusbd_cdc_is_configured(uint8_t coreid);
+bool tusbd_cdc_is_busy(uint8_t coreid, cdc_pipeid_t pipeid)  ATTR_PURE ATTR_WARN_UNUSED_RESULT;
 
 tusb_error_t tusbd_cdc_send(uint8_t coreid, void * p_data, uint32_t length, bool is_notify);
 tusb_error_t tusbd_cdc_receive(uint8_t coreid, void * p_buffer, uint32_t length, bool is_notify);
@@ -66,6 +67,7 @@ tusb_error_t tusbd_cdc_receive(uint8_t coreid, void * p_buffer, uint32_t length,
 void tusbd_cdc_mounted_cb(uint8_t coreid);
 void tusbd_cdc_unmounted_cb(uint8_t coreid);
 void tusbd_cdc_xfer_isr(uint8_t coreid, tusb_event_t event, cdc_pipeid_t pipe_id, uint32_t xferred_bytes);
+void tusbd_cdc_line_coding_changed_cb(uint8_t coreid, cdc_line_coding_t* p_line_coding);
 
 //--------------------------------------------------------------------+
 // USBD-CLASS DRIVER API

tinyusb/common/fifo.c

@@ -35,68 +35,13 @@
 	This file is part of the tinyusb stack.
 */
 /**************************************************************************/
-
+#include <string.h>
 #include "fifo.h"
 
-/**************************************************************************/
+static inline void mutex_lock   (fifo_t* f) ATTR_ALWAYS_INLINE;
-/*!
+static inline void mutex_unlock (fifo_t* f) ATTR_ALWAYS_INLINE;
-    @brief Disables the IRQ specified in the FIFO's 'irq' field
+static inline bool is_fifo_initalized(fifo_t* f) ATTR_ALWAYS_INLINE;
-           to prevent reads/write issues with interrupts
 
-    @param[in]  f
-                Pointer to the FIFO that should be protected
-*/
-/**************************************************************************/
-static inline void mutex_lock (fifo_t* f)
-{
-//  if (f->irq > 0)
-//    NVIC_DisableIRQ(f->irq);
-}
-
-/**************************************************************************/
-/*!
-    @brief Re-enables the IRQ specified in the FIFO's 'irq' field
-
-    @param[in]  f
-                Pointer to the FIFO that should be protected
-*/
-/**************************************************************************/
-static inline void mutex_unlock (fifo_t* f)
-{
-//  if (f->irq > 0)
-//    NVIC_EnableIRQ(f->irq);
-}
-
-/**************************************************************************/
-/*!
-    @brief Initialises the FIFO buffer
-
-    @param[in]  f
-                Pointer to the fifo_t object to intiialize
-    @param[in]  buffer
-                Pointer to the buffer's location in memory
-    @param[in]  size
-                The buffer size in bytes
-    @param[in]  overwritable
-                Set to TRUE is the FIFO is overwritable when the FIFO
-                is full (the first element will be overwritten)
-    @param[in]  irq
-                The IRQ number to disable for MUTEX protection.
-                Set the -1 if not required.
-*/
-/**************************************************************************/
-bool fifo_init(fifo_t* f, uint8_t* buffer, uint16_t size, bool overwritable) //, IRQn_Type irq)
-{
-  ASSERT(size > 0, false);
-
-  f->buf = buffer;
-  f->size = size;
-  f->rd_ptr = f->wr_ptr = f->len = 0;
-  f->overwritable = overwritable;
-//  f->irq = irq;
-
-  return true;
-}
 
 /**************************************************************************/
 /*!
@@ -114,49 +59,26 @@ bool fifo_init(fifo_t* f, uint8_t* buffer, uint16_t size, bool overwritable) //,
     @returns TRUE if the queue is not empty
 */
 /**************************************************************************/
-bool fifo_read(fifo_t* f, uint8_t *data)
+bool fifo_read(fifo_t* f, void * p_buffer)
+{
+  if( !is_fifo_initalized(f) || fifo_is_empty(f) )
   {
-  if (fifo_is_empty(f))
     return false;
+  }
 
   mutex_lock(f);
 
-  *data = f->buf[f->rd_ptr];
+  memcpy(p_buffer,
-  f->rd_ptr = (f->rd_ptr + 1) % f->size;
+         f->buffer + (f->rd_idx * f->item_size),
-  f->len--;
+         f->item_size);
+  f->rd_idx = (f->rd_idx + 1) % f->depth;
+  f->count--;
 
   mutex_unlock(f);
 
   return true;
 }
 
-/**************************************************************************/
-/*!
-    @brief Read a byte array from FIFO
-
-    @param[in]  f
-                Pointer to the FIFO buffer to manipulate
-    @param[in]  rx
-                Pointer to the place holder for data read from the buffer
-    @param[in]  maxlen
-                The maximum number of bytes to read from the FIFO
-
-    @returns The actual number of bytes read from the FIFO
- */
-/**************************************************************************/
-uint16_t fifo_read_n(fifo_t* f, uint8_t* rx, uint16_t maxlen)
-{
-  uint16_t len = 0;
-  
-  while ( len < maxlen && fifo_read(f, rx) )
-  {
-    len++;
-    rx++;
-  }
-  
-  return len;
-}
-
 /**************************************************************************/
 /*!
     @brief Write one byte into the RX buffer.
@@ -174,22 +96,27 @@ uint16_t fifo_read_n(fifo_t* f, uint8_t* rx, uint16_t maxlen)
              FIFO will always return TRUE)
 */
 /**************************************************************************/
-bool fifo_write(fifo_t* f, uint8_t data)
+bool fifo_write(fifo_t* f, void const * p_data)
+{
+  if ( !is_fifo_initalized(f) || (fifo_is_full(f) && !f->overwritable) )
   {
-  if ( fifo_is_full(f) && f->overwritable == false)
     return false;
+  }
 
   mutex_lock(f);
 
-  f->buf[f->wr_ptr] = data;
+  memcpy( f->buffer + (f->wr_idx * f->item_size),
-  f->wr_ptr = (f->wr_ptr + 1) % f->size;
+          p_data,
+          f->item_size);
+
+  f->wr_idx = (f->wr_idx + 1) % f->depth;
 
   if (fifo_is_full(f))
   {
-    f->rd_ptr = f->wr_ptr; // keep the full state (rd == wr && len = size)
+    f->rd_idx = f->wr_idx; // keep the full state (rd == wr && len = size)
   }else
   {
-    f->len++;
+    f->count++;
   }
 
   mutex_unlock(f);
@@ -209,9 +136,53 @@ void fifo_clear(fifo_t *f)
 {
   mutex_lock(f);
 
-  f->rd_ptr = 0;
+  f->rd_idx = f->wr_idx = f->count = 0;
-  f->wr_ptr = 0;
-  f->len = 0;
 
   mutex_unlock(f);
 }
+
+//--------------------------------------------------------------------+
+// HELPER FUNCTIONS
+//--------------------------------------------------------------------+
+
+/**************************************************************************/
+/*!
+    @brief Disables the IRQ specified in the FIFO's 'irq' field
+           to prevent reads/write issues with interrupts
+
+    @param[in]  f
+                Pointer to the FIFO that should be protected
+*/
+/**************************************************************************/
+static inline void mutex_lock (fifo_t* f)
+{
+//  if (f->irq > 0)
+//  {
+//    #if !defined (_TEST_)
+//    NVIC_DisableIRQ(f->irq);
+//    #endif
+//  }
+}
+
+/**************************************************************************/
+/*!
+    @brief Re-enables the IRQ specified in the FIFO's 'irq' field
+
+    @param[in]  f
+                Pointer to the FIFO that should be protected
+*/
+/**************************************************************************/
+static inline void mutex_unlock (fifo_t* f)
+{
+//  if (f->irq > 0)
+//  {
+//    #if !defined (_TEST_)
+//    NVIC_EnableIRQ(f->irq);
+//    #endif
+//  }
+}
+
+static inline bool is_fifo_initalized(fifo_t* f)
+{
+  return !( f->buffer == NULL || f->depth == 0 || f->item_size == 0);
+}

tinyusb/common/fifo.h

@@ -36,12 +36,6 @@
 */
 /**************************************************************************/
 
-/** \file
- *  \brief Error Header
- *
- *  \note TBD
- */
-
 /** \ingroup Group_Common
  *
  *  @{
@@ -59,36 +53,47 @@
 /** \struct fifo_t
  * \brief Simple Circular FIFO
  */
-typedef struct _fifo_t
+typedef struct
 {
-           uint8_t* buf          ; ///< buffer pointer
+           uint16_t const depth     ; ///< max items
-           uint16_t size         ; ///< buffer size
+           uint16_t const item_size ; ///< size of each item
-  volatile uint16_t len          ; ///< bytes in fifo
+  volatile uint16_t count           ; ///< number of items in queue
-  volatile uint16_t wr_ptr       ; ///< write pointer
+  volatile uint16_t wr_idx          ; ///< write pointer
-  volatile uint16_t rd_ptr       ; ///< read pointer
+  volatile uint16_t rd_idx          ; ///< read pointer
-           bool     overwritable ; ///< allow overwrite data when full
+           bool overwritable        ;
-//           IRQn_Type irq         ; ///< TODO (abstract later) interrupt used to lock fifo
+           uint8_t buffer[]         ; ///< buffer pointer
+  // IRQn_Type irq;
 } fifo_t;
 
-bool fifo_init(fifo_t* f, uint8_t* buffer, uint16_t size, bool overwritable); //, IRQn_Type irq);
+#define FIFO_DEF(name, ff_depth, type, is_overwritable) /*, irq_mutex)*/ \
-bool fifo_write(fifo_t* f, uint8_t data);
+  fifo_t name = {\
-bool fifo_read(fifo_t* f, uint8_t *data);
+      .depth        = ff_depth,\
-uint16_t fifo_read_n(fifo_t* f, uint8_t * rx, uint16_t maxlen);
+      .item_size    = sizeof(type),\
+      .overwritable = is_overwritable,\
+      /*.irq          = irq_mutex*/\
+      .buffer       = { [ff_depth*sizeof(type) - 1] = 0 },\
+  }
+
+bool fifo_write(fifo_t* f, void const * p_data);
+bool fifo_read(fifo_t* f, void * p_buffer);
 void fifo_clear(fifo_t *f);
 
+static inline bool fifo_is_empty(fifo_t* f) ATTR_PURE ATTR_ALWAYS_INLINE;
 static inline bool fifo_is_empty(fifo_t* f)
 {
-  return (f->len == 0);
+  return (f->count == 0);
 }
 
+static inline bool fifo_is_full(fifo_t* f) ATTR_PURE ATTR_ALWAYS_INLINE;
 static inline bool fifo_is_full(fifo_t* f)
 {
-  return (f->len == f->size);
+  return (f->count == f->depth);
 }
 
+static inline uint16_t fifo_get_length(fifo_t* f) ATTR_PURE ATTR_ALWAYS_INLINE;
 static inline uint16_t fifo_get_length(fifo_t* f)
 {
-  return f->len;
+  return f->count;
 }
 
 #ifdef __cplusplus