Part Number: AM3359
Tool/software: TI-RTOS
Hi TI,
beaglebone black, processor SDK RTOS 4.2.0.9, ccs 7.4
I am working on usb host bulk transfer, using USBHCDPipeSchedule() to write the data to ulBulkOutPipe.
According to //e2e.ti.com/.../
"when you schedule a write to an OUT pipe, you get an IN transaction", guess it is also true for TI-RTOS.
I have to write out 4 sets of data to configure the device. The device will return 4 distinct ACK signals in variable length upon receiving the individual data set.
However, I only receive 1st set of ACK signal, and the rest 3 write-outs not invoking the callback function (i.e., no UART print out). Below are codes for data-sending, and callback function.
void USBHCDCSendChars(unsigned char *pucData, uint32_t ulSize, tUSBHCDCInstance *USBHCDCDevice)
{
USBHCDPipeSchedule( USBHCDCDevice->ulIndex,
USBHCDCDevice->ulBulkOutPipe,
pucData,
ulSize);
}
unsigned char SchedulePipeInBuffer[512];
void USBHCDCINCallback(uint32_t ulIndex, uint32_t ulPipe, uint32_t ulEvent)
{
unsigned int ulSize, j, k;
// Handles a request to schedule a new request on the BULK IN pipe
if(ulEvent == USB_EVENT_SCHEDULER)
{
USBHCDPipeSchedule(sUSBHCDCDevice->ulIndex, sUSBHCDCDevice->ulBulkInPipe, SchedulePipeInBuffer, 512);
}
// Called when new data is available on the BULK IN pipe.
if(ulEvent == USB_EVENT_RX_AVAILABLE)
{
// If the callback exists then call it.
if(sUSBHCDCDevice->pfnCallback != 0)
{
// Get the bulk in data size.
ulSize = USBHCDPipeReadNonBlocking(sUSBHCDCDevice->ulIndex, sUSBHCDCDevice->ulBulkInPipe, SchedulePipeInBuffer, 512);
if(ulSize)
{
UART_printf("callback counts = %d\r\n", ulSize);
for (j = 0; j < ulSize; j++)
{
UART_printf(" %02x", SchedulePipeInBuffer[j]);
}
UART_printf("\r\n");
}
// Call
sUSBHCDCDevice->pfnCallback(sUSBHCDCDevice->ulIndex,
CDC_EVENT_RX_AVAILABLE,
(void*)SchedulePipeInBuffer,
ulSize);
// Schedule another read
USBHCDPipeSchedule(sUSBHCDCDevice->ulIndex, sUSBHCDCDevice->ulBulkInPipe, SchedulePipeInBuffer, 512);
}
}
}
Please advise, thanks in advance
Mike
