// Called in ISR context
// Set configuration. Return false if the configuration is not supported.
bool USBAudio::USBCallback_setConfiguration(uint8_t configuration) {
if (configuration != DEFAULT_CONFIGURATION) {
return false;
}
// Configure isochronous endpoint
realiseEndpoint(EPISO_OUT, PACKET_SIZE_ISO_IN, ISOCHRONOUS);
realiseEndpoint(EPISO_IN, PACKET_SIZE_ISO_OUT, ISOCHRONOUS);
// activate readings on this endpoint
readStart(EPISO_OUT, PACKET_SIZE_ISO_IN);
return true;
}
bool USB::USBCallback_setConfiguration(uint8_t configuration)
{
iprintf("[CONFIGURE %d]", configuration);
int i = findDescriptorIndex(0, DT_CONFIGURATION, configuration, 0);
if (i > 0)
{
iprintf("[FOUND at %d]", i);
uint8_t lastAlternate = 0;
i++;
for (; descriptors[i] != (usbdesc_base *) 0 && descriptors[i]->bDescType != DT_CONFIGURATION; i++) {
switch(descriptors[i]->bDescType)
{
case DT_INTERFACE: {
usbdesc_interface *interface = (usbdesc_interface *) descriptors[i];
iprintf("[INTERFACE %d:%d]",interface->bInterfaceNumber, interface->bAlternateSetting);
interface->selectedAlternate = 0;
lastAlternate = interface->bAlternateSetting;
break;
};
case DT_ENDPOINT: {
usbdesc_endpoint *ep = (usbdesc_endpoint *) descriptors[i];
iprintf("[EP 0x%02X](%d)", ep->bEndpointAddress, lastAlternate);
if (lastAlternate == 0) {
iprintf("[Realised!]\n");
realiseEndpoint(ep->bEndpointAddress, ep->wMaxPacketSize, ((ep->bmAttributes & 3) == EA_ISOCHRONOUS)?ISOCHRONOUS:0);
}
break;
};
}
}
return true;
}
return false;
}
bool USB::USBCallback_setInterface(uint16_t interface, uint8_t alternate) {
int i = findDescriptorIndex(0, DT_INTERFACE, interface, alternate);
if (i > 0)
{
int j = findDescriptorIndex(0, DT_INTERFACE, interface, 0);
if (j > 0) {
((usbdesc_interface *) descriptors[j])->selectedAlternate = alternate;
for (; (descriptors[i]->bDescType != DT_INTERFACE) && (descriptors[i]->bDescType != DT_CONFIGURATION); i++) {
if (descriptors[i]->bDescType == DT_ENDPOINT) {
usbdesc_endpoint *ep = (usbdesc_endpoint *) descriptors[i];
realiseEndpoint(ep->bEndpointAddress, ep->wMaxPacketSize, ((ep->bmAttributes & 3) == EA_ISOCHRONOUS)?ISOCHRONOUS:0);
}
}
}
}
return false;
}