static bool udd_ctrl_interrupt_error(void)
{
// Underflow only managed for control endpoint
if (udd_is_underflow_event()) {
udd_ack_underflow_event();
if (udd_control_in_underflow()) {
udd_ctrl_underflow();
}
return true;
}
// Overflow only managed for control endpoint
if (udd_is_overflow_event()) {
udd_ack_overflow_event();
if (udd_control_out_overflow()) {
udd_ctrl_overflow();
}
return true;
}
return false;
}
static bool udd_ctrl_interrupt(void)
{
if (!Is_udd_endpoint_interrupt(0))
return false; // No interrupt events on control endpoint
// By default disable overflow and underflow interrupt
udd_disable_nak_in_interrupt(0);
udd_disable_nak_out_interrupt(0);
// Search event on control endpoint
if (Is_udd_setup_received(0)) {
// SETUP packet received
udd_ctrl_setup_received();
return true;
}
if (Is_udd_in_send(0) && Is_udd_in_send_interrupt_enabled(0)) {
// IN packet sent
udd_ctrl_in_sent();
return true;
}
if (Is_udd_out_received(0)) {
// OUT packet received
udd_ctrl_out_received();
return true;
}
if (Is_udd_nak_out(0)) {
// Overflow on OUT packet
udd_ack_nak_out(0);
udd_ctrl_overflow();
return true;
}
if (Is_udd_nak_in(0)) {
// Underflow on IN packet
udd_ack_nak_in(0);
udd_ctrl_underflow();
return true;
}
return false;
}
