specchioriflesso/USB_Host_Shield_2.0
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Change to Windows style enumeration process.

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Some devices return only 8 bytes of Device Descriptor by default address.
(e.g. Novation Circuit)
This commit is contained in:
Yuuichi Akagawa 2020-11-23 20:08:07 +09:00
parent 86ac217305
commit cf0fad4045
1 changed files with 10 additions and 4 deletions
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14
usbh_midi.cpp
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@ -147,10 +147,9 @@ uint8_t USBH_MIDI::Init(uint8_t parent, uint8_t port, bool lowspeed)
p->epinfo = epInfo;
p->lowspeed = lowspeed;
// Get device descriptor
rcode = pUsb->getDevDescr( 0, 0, sizeof(USB_DEVICE_DESCRIPTOR), (uint8_t*)buf );
vid = udd->idVendor;
pid = udd->idProduct;
// First Device Descriptor Request (Initially first 8 bytes)
rcode = pUsb->getDevDescr( 0, 0, 8, (uint8_t*)buf );
// Restore p->epinfo
p->epinfo = oldep_ptr;
@ -186,6 +185,13 @@ uint8_t USBH_MIDI::Init(uint8_t parent, uint8_t port, bool lowspeed)
}
p->lowspeed = lowspeed;
// Second Device Descriptor Request (Full)
rcode = pUsb->getDevDescr( bAddress, 0, sizeof(USB_DEVICE_DESCRIPTOR), (uint8_t*)buf );
if( rcode ){
goto FailGetDevDescr;
}
vid = udd->idVendor;
pid = udd->idProduct;
num_of_conf = udd->bNumConfigurations;
// Assign epInfo to epinfo pointer