Posted on November 16, 2012 at 12:34Hello!
I try to implement a USB Host with 2 Endpoints in Bulk mode on a STM32F107.
I use the lastest library : ''
STM32 USB On-The-Go Host and Device Library
V2.0.0''
I wrote the class driver core like this:
in USBH_InterfaceInit function I check the interface an i open the appropiate pipes like this:
/* Allocate endpoints */
ADB_Machine.hc_num_out = USBH_Alloc_Channel(pdev, ADB_Machine.BulkOutEp);
ADB_Machine.hc_num_in = USBH_Alloc_Channel(pdev, ADB_Machine.BulkInEp);
/* Open the new channels */
USBH_Open_Channel(pdev, ADB_Machine.hc_num_out, pphost->device_prop.address, pphost->device_prop.speed, EP_TYPE_BULK, ADB_Machine.BulkOutEpSize);
USBH_Open_Channel(pdev, ADB_Machine.hc_num_in, pphost->device_prop.address, pphost->device_prop.speed, EP_TYPE_BULK, ADB_Machine.BulkInEpSize);
then on USBH_Handle function I can write to device through the endpoint (EPOUT)
URB_STATE URB_Status = USBH_BulkSendData(pdev, buff, length, ADB_Machine.hc_num_out);
if (URB_Status == USBH_OK)
{
printf(''-->'');
URB_Status = URB_IDLE;
while (URB_Status!=URB_DONE)
{
URB_Status = HCD_GetURB_State(pdev , ADB_Machine.hc_num_out);
}
printf(''USBH_BulkSendData done\n'');
}
else
printf(''USBH_BulkSendData failed\n'');
Ok, it's works!
but when I want to read the device, the USBH_BulkReceiveData function blocks an MCU always goes into an USB-interrupt loop !
USBH_BulkReceiveData(pdev, buff, length, ADB_Machine.hc_num_in);
Thank you in advance for your replies.
by the way, I found a mistake in ''usbh_stdreq.c'' at the function USBH_ParseCfgDesc
With devices with many inferfaces the ''USBH_ParseCfgDesc'' function stores the endpoints descritors only on the first interface slot!
so, i changed this line ''pep = &ep_desc[ep_ix];''
by this one ''pep = &ep_desc[USBH_MAX_NUM_ENDPOINTS*if_ix + ep_ix];''
Best regards, Thierry
#usbh_bulkreceivedata #stm32f107
