Add missing "used" attribute to ATTR_INIT_SECTION to ensure functions declared with...

[pub/USBasp.git] / Demos / Device / ClassDriver / AudioOutput / AudioOutput.c

diff --git a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
index f1d6060..8858999 100644 (file)
--- a/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
+++ b/Demos/Device/ClassDriver/AudioOutput/AudioOutput.c
@@ -91,7 +91,8 @@ void SetupHardware(void)
 ISR(TIMER0_COMPA_vect, ISR_BLOCK)
 {
        uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();
 ISR(TIMER0_COMPA_vect, ISR_BLOCK)
 {
        uint8_t PrevEndpoint = Endpoint_GetCurrentEndpoint();

-
+       
+       /* Check that the USB bus is ready for the next sample to read */

        if (Audio_Device_IsSampleReceived(&Speaker_Audio_Interface))
        {
                /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */
        if (Audio_Device_IsSampleReceived(&Speaker_Audio_Interface))
        {
                /* Retrieve the signed 16-bit left and right audio samples, convert to 8-bit */


@@ -214,7 +215,7 @@ void EVENT_USB_Device_ControlRequest(void)
  *
  *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state.
  *  \param[in]     EndpointProperty    Property of the endpoint to get or set, a value from Audio_ClassRequests_t.
  *
  *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state.
  *  \param[in]     EndpointProperty    Property of the endpoint to get or set, a value from Audio_ClassRequests_t.

- *  \param[in]     EndpointIndex       Index of the streaming endpoint whose property is being referenced.
+ *  \param[in]     EndpointAddress     Address of the streaming endpoint whose property is being referenced.

  *  \param[in]     EndpointControl     Parameter of the endpoint to get or set, a value from Audio_EndpointControls_t.
  *  \param[in,out] DataLength          For SET operations, the length of the parameter data to set. For GET operations, the maximum
  *                                     length of the retrieved data. When NULL, the function should return whether the given property
  *  \param[in]     EndpointControl     Parameter of the endpoint to get or set, a value from Audio_EndpointControls_t.
  *  \param[in,out] DataLength          For SET operations, the length of the parameter data to set. For GET operations, the maximum
  *                                     length of the retrieved data. When NULL, the function should return whether the given property


@@ -224,47 +225,45 @@ void EVENT_USB_Device_ControlRequest(void)
  *
  *  \return Boolean true if the property get/set was successful, false otherwise
  */
  *
  *  \return Boolean true if the property get/set was successful, false otherwise
  */

-bool CALLBACK_Audio_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
-                                           const uint8_t EndpointProperty,
-                                           const uint8_t EndpointAddress,
-                                           const uint8_t EndpointControl,
-                                           uint16_t* const DataLength,
-                                           uint8_t* Data)
+bool CALLBACK_Audio_Device_GetSetEndpointProperty(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo,
+                                                  const uint8_t EndpointProperty,
+                                                  const uint8_t EndpointAddress,
+                                                  const uint8_t EndpointControl,
+                                                  uint16_t* const DataLength,
+                                                  uint8_t* Data)

 {
        /* Check the requested endpoint to see if a supported endpoint is being manipulated */
 {
        /* Check the requested endpoint to see if a supported endpoint is being manipulated */

-       if (EndpointAddress == (ENDPOINT_DESCRIPTOR_DIR_OUT | Speaker_Audio_Interface.Config.DataOUTEndpointNumber))
+       if (EndpointAddress == (ENDPOINT_DIR_OUT | Speaker_Audio_Interface.Config.DataOUTEndpointNumber))

        {
                /* Check the requested control to see if a supported control is being manipulated */
                if (EndpointControl == AUDIO_EPCONTROL_SamplingFreq)
                {
        {
                /* Check the requested control to see if a supported control is being manipulated */
                if (EndpointControl == AUDIO_EPCONTROL_SamplingFreq)
                {

-                       /* Check the requested property to see if a supported property is being manipulated */
-                       if (EndpointProperty == AUDIO_REQ_SetCurrent)
-                       {
-                               /* Check if we are just testing for a valid property, or actually adjusting it */
-                               if (DataLength != NULL)
-                               {
-                                       /* Set the new sampling frequency to the value given by the host */
-                                       CurrentAudioSampleFrequency = (((uint32_t)Data[2] << 16) | ((uint32_t)Data[1] << 8) | (uint32_t)Data[0]);
-
-                                       /* Adjust sample reload timer to the new frequency */
-                                       OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);                                
-                               }
-                               
-                               return true;
-                       }
-                       else if (EndpointProperty == AUDIO_REQ_GetCurrent)
+                       switch (EndpointProperty)

                        {
                        {

-                               /* Check if we are just testing for a valid property, or actually reading it */
-                               if (DataLength != NULL)
-                               {
-                                       *DataLength = 3;
-
-                                       Data[2] = (CurrentAudioSampleFrequency >> 16);
-                                       Data[1] = (CurrentAudioSampleFrequency >> 8);
-                                       Data[0] = (CurrentAudioSampleFrequency &  0xFF);                                        
-                               }
-                               
-                               return true;
+                               case AUDIO_REQ_SetCurrent:
+                                       /* Check if we are just testing for a valid property, or actually adjusting it */
+                                       if (DataLength != NULL)
+                                       {
+                                               /* Set the new sampling frequency to the value given by the host */
+                                               CurrentAudioSampleFrequency = (((uint32_t)Data[2] << 16) | ((uint32_t)Data[1] << 8) | (uint32_t)Data[0]);
+
+                                               /* Adjust sample reload timer to the new frequency */
+                                               OCR0A = ((F_CPU / 8 / CurrentAudioSampleFrequency) - 1);                                
+                                       }
+                                       
+                                       return true;                            
+                               case AUDIO_REQ_GetCurrent:
+                                       /* Check if we are just testing for a valid property, or actually reading it */
+                                       if (DataLength != NULL)
+                                       {
+                                               *DataLength = 3;
+
+                                               Data[2] = (CurrentAudioSampleFrequency >> 16);
+                                               Data[1] = (CurrentAudioSampleFrequency >> 8);
+                                               Data[0] = (CurrentAudioSampleFrequency &  0xFF);                                        
+                                       }
+                                       
+                                       return true;

                        }
                }
        }
                        }
                }
        }