/************************************************************************************//**
** \brief Checks if there is still data left to transmit and if so submits it
** for transmission with the USB endpoint.
** \return none.
**
****************************************************************************************/
static void UsbTransmitPipeBulkIN(void)
{
tUSBRingBufObject txRing;
blt_int32u txSpace;
blt_int32u txWriteIdx;
blt_int8u nr_of_bytes_for_tx_endpoint;
blt_int8u byte_counter;
blt_int8u byte_value;
blt_bool result;
/* read how many bytes should be transmitted */
nr_of_bytes_for_tx_endpoint = UsbFifoMgrScan(fifoPipeBulkIN.handle);
/* only continue if there is actually data left to transmit */
if (nr_of_bytes_for_tx_endpoint == 0)
{
return;
}
/* get information about the USB transmit buffer */
USBBufferInfoGet(&g_sTxBuffer, &txRing);
/* determine how many bytes will still fit in the tx buffer */
txSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
/* only transmit the amount of bytes that will fit in the tx buffer */
if (nr_of_bytes_for_tx_endpoint > txSpace)
{
nr_of_bytes_for_tx_endpoint = txSpace;
}
/* determine write index for the tx buffer */
txWriteIdx = txRing.ui32WriteIndex;
/* copy the transmit data to the transmit buffer */
for (byte_counter=0; byte_counter < nr_of_bytes_for_tx_endpoint; byte_counter++)
{
/* obtain data from the fifo */
result = UsbFifoMgrRead(fifoPipeBulkIN.handle, &byte_value);
ASSERT_RT(result == BLT_TRUE);
/* store it in the transmit buffer */
g_pui8USBTxBuffer[txWriteIdx] = byte_value;
/* increment index with wrapping */
txWriteIdx++;
if (txWriteIdx >= BULK_BUFFER_SIZE)
{
txWriteIdx = 0;
}
}
/* inform the usb library that new data are ready for transmission */
USBBufferDataWritten(&g_sTxBuffer, nr_of_bytes_for_tx_endpoint);
} /*** end of UsbTransmitPipeBulkIN ***/
void
AppCheck(void)
{
#if FW_UPDATE
if (*(uint32_t *)pAppSig != FWBL)
return;
*(uint32_t *)pAppSig = FWAPP;
uint8_t buffer[] = {0x10, 0x02, 0x10, 0x10, 0x19, 04, 0x09, 0x0e, 0x10, 0x10, 0x25, 0x00, 0x00, 0x10, 0x03};
uint8_t len = 15;
uint32_t ulWriteIndex;
tUSBRingBufObject sTxRing;
uint8_t i;
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
ulWriteIndex = sTxRing.ui32WriteIndex;
for (i = 0; i < len; i++) {
g_pui8USBTxBuffer[ulWriteIndex++] = *(buffer + i);
ulWriteIndex = (ulWriteIndex == BULK_BUFFER_SIZE) ? 0 : ulWriteIndex;
}
USBBufferDataWritten(&g_sTxBuffer, len);
#endif
}
TASKSTATUS
UsbTxTaskMgr(UsbTxTask *pusbobj)
{
uint32_t ulSpace, ulWriteIndex;
tUSBRingBufObject sTxRing;
uint8_t i;
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
ulSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
if (ulSpace < pusbobj->Len)
return TASKSTS_ONGOING;
ulWriteIndex = sTxRing.ui32WriteIndex;
for (i=0; i<pusbobj->Len; i++) {
g_pui8USBTxBuffer[ulWriteIndex++] = *(pusbobj->pBuf + i);
ulWriteIndex = (ulWriteIndex == BULK_BUFFER_SIZE) ? 0 : ulWriteIndex;
}
USBBufferDataWritten(&g_sTxBuffer, pusbobj->Len);
free(pusbobj->pBuf);
pusbobj->MemProd--;
ASSERT(pusbobj->MemProd == 1);
free(pusbobj);
return TASKSTS_FINISH;
}
//*****************************************************************************
//
// Receive new data and echo it back to the host.
//
// \param psDevice points to the instance data for the device whose data is to
// be processed.
// \param pi8Data points to the newly received data in the USB receive buffer.
// \param ui32NumBytes is the number of bytes of data available to be processed.
//
// This function is called whenever we receive a notification that data is
// available from the host. We read the data, byte-by-byte and swap the case
// of any alphabetical characters found then write it back out to be
// transmitted back to the host.
//
// \return Returns the number of bytes of data processed.
//
//*****************************************************************************
static uint32_t
EchoNewDataToHost(tUSBDBulkDevice *psDevice, uint8_t *pi8Data,
uint_fast32_t ui32NumBytes)
{
uint_fast32_t ui32Loop, ui32Space, ui32Count;
uint_fast32_t ui32ReadIndex;
uint_fast32_t ui32WriteIndex;
tUSBRingBufObject sTxRing;
//
// Get the current buffer information to allow us to write directly to
// the transmit buffer (we already have enough information from the
// parameters to access the receive buffer directly).
//
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
//
// How much space is there in the transmit buffer?
//
ui32Space = USBBufferSpaceAvailable(&g_sTxBuffer);
//
// How many characters can we process this time round?
//
ui32Loop = (ui32Space < ui32NumBytes) ? ui32Space : ui32NumBytes;
ui32Count = ui32Loop;
//
// Update our receive counter.
//
g_ui32RxCount += ui32NumBytes;
//
// Dump a debug message.
//
DEBUG_PRINT("Received %d bytes\n", ui32NumBytes);
//
// Set up to process the characters by directly accessing the USB buffers.
//
ui32ReadIndex = (uint32_t)(pi8Data - g_pui8USBRxBuffer);
ui32WriteIndex = sTxRing.ui32WriteIndex;
while(ui32Loop)
{
//
// Copy from the receive buffer to the transmit buffer converting
// character case on the way.
//
//
// Is this a lower case character?
//
if((g_pui8USBRxBuffer[ui32ReadIndex] >= 'a') &&
(g_pui8USBRxBuffer[ui32ReadIndex] <= 'z'))
{
//
// Convert to upper case and write to the transmit buffer.
//
g_pui8USBTxBuffer[ui32WriteIndex] =
(g_pui8USBRxBuffer[ui32ReadIndex] - 'a') + 'A';
}
else
{
//
// Is this an upper case character?
//
if((g_pui8USBRxBuffer[ui32ReadIndex] >= 'A') &&
(g_pui8USBRxBuffer[ui32ReadIndex] <= 'Z'))
{
//
// Convert to lower case and write to the transmit buffer.
//
g_pui8USBTxBuffer[ui32WriteIndex] =
(g_pui8USBRxBuffer[ui32ReadIndex] - 'Z') + 'z';
}
else
{
//
// Copy the received character to the transmit buffer.
//
g_pui8USBTxBuffer[ui32WriteIndex] =
g_pui8USBRxBuffer[ui32ReadIndex];
}
}
//
// Move to the next character taking care to adjust the pointer for
// the buffer wrap if necessary.
//
ui32WriteIndex++;
ui32WriteIndex =
(ui32WriteIndex == BULK_BUFFER_SIZE) ? 0 : ui32WriteIndex;
ui32ReadIndex++;
ui32ReadIndex = (ui32ReadIndex == BULK_BUFFER_SIZE) ? 0 : ui32ReadIndex;
ui32Loop--;
}
//
// We've processed the data in place so now send the processed data
// back to the host.
//
USBBufferDataWritten(&g_sTxBuffer, ui32Count);
DEBUG_PRINT("Wrote %d bytes\n", ui32Count);
//
// We processed as much data as we can directly from the receive buffer so
// we need to return the number of bytes to allow the lower layer to
// update its read pointer appropriately.
//
return(ui32Count);
}
//*****************************************************************************
//
// Receive new data and echo it back to the host.
//
// \param psDevice points to the instance data for the device whose data is to
// be processed.
// \param pcData points to the newly received data in the USB receive buffer.
// \param ulNumBytes is the number of bytes of data available to be processed.
//
// This function is called whenever there is data available from the host. The
// data is read byte-by-byte, the case of any alphabetical characters is
// swapped, and then it is written back out to be transmitted back to the host.
//
// \return Returns the number of bytes of data processed.
//
//*****************************************************************************
static unsigned long
EchoNewDataToHost(tUSBDBulkDevice *psDevice, unsigned char *pcData,
unsigned long ulNumBytes)
{
unsigned long ulLoop, ulSpace, ulCount;
unsigned long ulReadIndex;
unsigned long ulWriteIndex;
tUSBRingBufObject sTxRing;
//
// Get the current buffer information to allow us to write directly to the
// transmit buffer (there is already have enough information from the
// parameters to access the receive buffer directly).
//
USBBufferInfoGet(&g_sTxBuffer, &sTxRing);
//
// How much space is there in the transmit buffer?
//
ulSpace = USBBufferSpaceAvailable(&g_sTxBuffer);
//
// How many characters can be processed this time round?
//
ulLoop = (ulSpace < ulNumBytes) ? ulSpace : ulNumBytes;
ulCount = ulLoop;
//
// Update our receive counter.
//
g_ulRxCount += ulNumBytes;
//
// Set up to process the characters by directly accessing the USB buffers.
//
ulReadIndex = (unsigned long)(pcData - g_pucUSBRxBuffer);
ulWriteIndex = sTxRing.ulWriteIndex;
//
// Copy from the receive buffer to the transmit buffer converting character
// case on the way.
//
while(ulLoop--)
{
//
// Is this a lower case character?
//
if((g_pucUSBRxBuffer[ulReadIndex] >= 'a') &&
(g_pucUSBRxBuffer[ulReadIndex] <= 'z'))
{
//
// Convert to upper case and write to the transmit buffer.
//
g_pucUSBTxBuffer[ulWriteIndex] =
(g_pucUSBRxBuffer[ulReadIndex] - 'a') + 'A';
}
else
{
//
// Is this an upper case character?
//
if((g_pucUSBRxBuffer[ulReadIndex] >= 'A') &&
(g_pucUSBRxBuffer[ulReadIndex] <= 'Z'))
{
//
// Convert to lower case and write to the transmit buffer.
//
g_pucUSBTxBuffer[ulWriteIndex] =
(g_pucUSBRxBuffer[ulReadIndex] - 'Z') + 'z';
}
else
{
//
// Copy the received character to the transmit buffer.
//
g_pucUSBTxBuffer[ulWriteIndex] = g_pucUSBRxBuffer[ulReadIndex];
}
}
//
// Move to the next character taking care to adjust the pointer for
// the buffer wrap if necessary.
//
ulWriteIndex++;
ulWriteIndex = (ulWriteIndex == BULK_BUFFER_SIZE) ? 0 : ulWriteIndex;
ulReadIndex++;
ulReadIndex = (ulReadIndex == BULK_BUFFER_SIZE) ? 0 : ulReadIndex;
}
//
// The data has been processed in place so now send the processed data back
// to the host.
//
USBBufferDataWritten(&g_sTxBuffer, ulCount);
//
// Return the number of bytes processed to allow the bulk device driver to
// update its read pointer appropriately.
//
return(ulCount);
}
