void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, const int16_t Sample)
{
Endpoint_Write_Word_LE(Sample);
if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
Endpoint_ClearIN();
}
/** Handler for the XPROG CRC command to read a specific memory space's CRC value for comparison between the
* attached device's memory and a data set on the host.
*/
static void XPROGProtocol_ReadCRC(void)
{
uint8_t ReturnStatus = XPRG_ERR_OK;
struct
{
uint8_t CRCType;
} ReadCRC_XPROG_Params;
Endpoint_Read_Stream_LE(&ReadCRC_XPROG_Params, sizeof(ReadCRC_XPROG_Params), NO_STREAM_CALLBACK);
Endpoint_ClearOUT();
Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPNUM);
Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN);
uint32_t MemoryCRC;
if (XPROG_SelectedProtocol == XPRG_PROTOCOL_PDI)
{
uint8_t CRCCommand;
/* Determine which NVM command to send to the device depending on the memory to CRC */
switch (ReadCRC_XPROG_Params.CRCType)
{
case XPRG_CRC_APP:
CRCCommand = XMEGA_NVM_CMD_APPCRC;
break;
case XPRG_CRC_BOOT:
CRCCommand = XMEGA_NVM_CMD_BOOTCRC;
break;
default:
CRCCommand = XMEGA_NVM_CMD_FLASHCRC;
break;
}
/* Perform and retrieve the memory CRC, indicate timeout if occurred */
if (!(XMEGANVM_GetMemoryCRC(CRCCommand, &MemoryCRC)))
ReturnStatus = XPRG_ERR_TIMEOUT;
}
else
{
/* TPI does not support memory CRC */
ReturnStatus = XPRG_ERR_FAILED;
}
Endpoint_Write_Byte(CMD_XPROG);
Endpoint_Write_Byte(XPRG_CMD_CRC);
Endpoint_Write_Byte(ReturnStatus);
if (ReturnStatus == XPRG_ERR_OK)
{
Endpoint_Write_Byte(MemoryCRC >> 16);
Endpoint_Write_Word_LE(MemoryCRC & 0xFFFF);
}
/** Task to manage the Audio interface, reading in ADC samples from the microphone, and them to the host. */
void USB_Audio_Task(void)
{
/* Device must be connected and configured for the task to run */
if (USB_DeviceState != DEVICE_STATE_Configured)
return;
/* Check to see if the streaming interface is selected, if not the host is not receiving audio */
if (!(StreamingAudioInterfaceSelected))
return;
/* Select the audio stream endpoint */
Endpoint_SelectEndpoint(AUDIO_STREAM_EPNUM);
/* Check if the current endpoint can be written to and that the next sample should be stored */
if (Endpoint_IsINReady() && (TIFR0 & (1 << OCF0A)))
{
/* Clear the sample reload timer */
TIFR0 |= (1 << OCF0A);
/* Audio sample is ADC value scaled to fit the entire range */
int16_t AudioSample = ((SAMPLE_MAX_RANGE / ADC_MAX_RANGE) * ADC_GetResult());
#if defined(MICROPHONE_BIASED_TO_HALF_RAIL)
/* Microphone is biased to half rail voltage, subtract the bias from the sample value */
AudioSample -= (SAMPLE_MAX_RANGE / 2);
#endif
/* Write the sample to the buffer */
Endpoint_Write_Word_LE(AudioSample);
/* Check to see if the bank is now full */
if (!(Endpoint_IsReadWriteAllowed()))
{
/* Send the full packet to the host */
Endpoint_ClearIN();
}
}
}
void EVENT_USB_Device_UnhandledControlRequest(void) {
if (port_cur == 5 && USB_ControlRequest.bRequest == REQ_SetInterface) {
/* can ignore this */
Endpoint_ClearSETUP();
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
return;
}
if (port_cur == 0 &&
USB_ControlRequest.bmRequestType == 0xA0 &&
USB_ControlRequest.bRequest == 0x00 && // GET HUB STATUS
USB_ControlRequest.wValue == 0x00 &&
USB_ControlRequest.wIndex == 0x00 &&
USB_ControlRequest.wLength == 0x04) {
Endpoint_ClearSETUP();
Endpoint_Write_Word_LE(0x0000); // wHubStatus
Endpoint_Write_Word_LE(0x0000); // wHubChange
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
return;
}
if (port_cur == 0 &&
USB_ControlRequest.bmRequestType == 0xA3 &&
USB_ControlRequest.bRequest == 0x00 && // GET PORT STATUS
USB_ControlRequest.wValue == 0x00 &&
USB_ControlRequest.wLength == 0x04) {
uint8_t p = USB_ControlRequest.wIndex;
if (p < 1 || p > 6) return;
Endpoint_ClearSETUP();
Endpoint_Write_Word_LE(port_status[p - 1]); // wHubStatus
Endpoint_Write_Word_LE(port_change[p - 1]); // wHubChange
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
return;
}
if (port_cur == 0 &&
USB_ControlRequest.bmRequestType == 0x23 &&
USB_ControlRequest.bRequest == 0x03 && // SET_FEATURE
USB_ControlRequest.wLength == 0x00) {
uint8_t p = USB_ControlRequest.wIndex;
if (p < 1 || p > 6) return;
Endpoint_ClearSETUP();
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
switch(USB_ControlRequest.wValue) {
case 0x0008: // PORT_POWER
if (p == 6 && state == init) {
/* after the 6th port is powered, wait a bit and continue */
state = hub_ready;
expire = 15;
}
break;
case 0x0004: // PORT_RESET
hub_int_response = (1 << p);
port_change[p - 1] |= C_PORT_RESET;
break;
}
return;
}
if (port_cur == 0 &&
USB_ControlRequest.bmRequestType == 0x23 &&
USB_ControlRequest.bRequest == 0x01 && // CLEAR_FEATURE
USB_ControlRequest.wLength == 0x00) {
uint8_t p = USB_ControlRequest.wIndex;
if (p < 1 || p > 6) return;
Endpoint_ClearSETUP();
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
switch(USB_ControlRequest.wValue) {
case 0x0010: // C_PORT_CONNECTION
last_port_conn_clear = p;
port_change[p - 1] &= ~C_PORT_CONN;
break;
case 0x0014: // C_PORT_RESET
last_port_reset_clear = p;
port_change[p - 1] &= ~C_PORT_RESET;
break;
}
return;
}
panic(RED, GREEN);
}
/** Event handler for the USB_ControlRequest event. This is used to catch and process control requests sent to
* the device from the USB host before passing along unhandled control requests to the library for processing
* internally.
*/
void EVENT_USB_Device_ControlRequest(void)
{
uint8_t TMCRequestStatus = TMC_STATUS_SUCCESS;
/* Process TMC specific control requests */
switch (USB_ControlRequest.bRequest)
{
case Req_InitiateAbortBulkOut:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Check that no split transaction is already in progress and the data transfer tag is valid */
if (RequestInProgress != 0)
{
TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;
}
else if (USB_ControlRequest.wValue != CurrentTransferTag)
{
TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;
}
else
{
/* Indicate that all in-progress/pending data OUT requests should be aborted */
IsTMCBulkOUTReset = true;
/* Save the split request for later checking when a new request is received */
RequestInProgress = Req_InitiateAbortBulkOut;
}
Endpoint_ClearSETUP();
/* Write the request response byte */
Endpoint_Write_Byte(TMCRequestStatus);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
case Req_CheckAbortBulkOutStatus:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Check that an ABORT BULK OUT transaction has been requested and that the request has completed */
if (RequestInProgress != Req_InitiateAbortBulkOut)
TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
else if (IsTMCBulkOUTReset)
TMCRequestStatus = TMC_STATUS_PENDING;
else
RequestInProgress = 0;
Endpoint_ClearSETUP();
/* Write the request response bytes */
Endpoint_Write_Byte(TMCRequestStatus);
Endpoint_Write_Word_LE(0);
Endpoint_Write_DWord_LE(LastTransferLength);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
case Req_InitiateAbortBulkIn:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Check that no split transaction is already in progress and the data transfer tag is valid */
if (RequestInProgress != 0)
{
TMCRequestStatus = TMC_STATUS_SPLIT_IN_PROGRESS;
}
else if (USB_ControlRequest.wValue != CurrentTransferTag)
{
TMCRequestStatus = TMC_STATUS_TRANSFER_NOT_IN_PROGRESS;
}
else
{
/* Indicate that all in-progress/pending data IN requests should be aborted */
IsTMCBulkINReset = true;
/* Save the split request for later checking when a new request is received */
RequestInProgress = Req_InitiateAbortBulkIn;
}
Endpoint_ClearSETUP();
/* Write the request response bytes */
Endpoint_Write_Byte(TMCRequestStatus);
Endpoint_Write_Byte(CurrentTransferTag);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
case Req_CheckAbortBulkInStatus:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_ENDPOINT))
{
/* Check that an ABORT BULK IN transaction has been requested and that the request has completed */
if (RequestInProgress != Req_InitiateAbortBulkIn)
TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
else if (IsTMCBulkINReset)
TMCRequestStatus = TMC_STATUS_PENDING;
else
RequestInProgress = 0;
Endpoint_ClearSETUP();
/* Write the request response bytes */
Endpoint_Write_Byte(TMCRequestStatus);
Endpoint_Write_Word_LE(0);
Endpoint_Write_DWord_LE(LastTransferLength);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
case Req_InitiateClear:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
{
/* Check that no split transaction is already in progress */
if (RequestInProgress != 0)
{
Endpoint_Write_Byte(TMC_STATUS_SPLIT_IN_PROGRESS);
}
else
{
/* Indicate that all in-progress/pending data IN and OUT requests should be aborted */
IsTMCBulkINReset = true;
IsTMCBulkOUTReset = true;
/* Save the split request for later checking when a new request is received */
RequestInProgress = Req_InitiateClear;
}
Endpoint_ClearSETUP();
/* Write the request response byte */
Endpoint_Write_Byte(TMCRequestStatus);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
case Req_CheckClearStatus:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
{
/* Check that a CLEAR transaction has been requested and that the request has completed */
if (RequestInProgress != Req_InitiateClear)
TMCRequestStatus = TMC_STATUS_SPLIT_NOT_IN_PROGRESS;
else if (IsTMCBulkINReset || IsTMCBulkOUTReset)
TMCRequestStatus = TMC_STATUS_PENDING;
else
RequestInProgress = 0;
Endpoint_ClearSETUP();
/* Write the request response bytes */
Endpoint_Write_Byte(TMCRequestStatus);
Endpoint_Write_Byte(0);
Endpoint_ClearIN();
Endpoint_ClearStatusStage();
}
break;
case Req_GetCapabilities:
if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
{
Endpoint_ClearSETUP();
/* Write the device capabilities to the control endpoint */
Endpoint_Write_Control_Stream_LE(&Capabilities, sizeof(TMC_Capabilities_t));
Endpoint_ClearOUT();
}
break;
}
}