#include "eem.h"

#include <memory.h>

#include "../usb.h"

static USB_EemState eems = {0};

void usb_eem_init(uint8_t data_ep) {
    // clear the state
    memset(&eems, 0, sizeof(USB_EemState));

    // store data endpoint number
    eems.data_ep = data_ep;

    // EEM is operational
    eems.initialized = true;
}

int usb_eem_process_and_return(USB_CallbackEvent *cbevt) {
    switch (cbevt->type) {
    case USB_CBEVT_UNKNOWN_REQ:
        break;

    case USB_CBEVT_OUT:
        break;

    case USB_CBEVT_IN:
        if (cbevt->ep == eems.data_ep) { // verify endpoint number
            usbcore_write(eems.data_ep, NULL, 0); // send ZLP
        }
        break;

    default:
        break;
    }

    return 0;
}