/// \method any()
/// Return `True` if any characters waiting, else `False`.
STATIC mp_obj_t pyb_usb_vcp_any(mp_obj_t self_in) {
if (USBD_CDC_RxNum() > 0) {
return mp_const_true;
} else {
return mp_const_false;
}
}
int USBD_CDC_RxGet(void) {
// wait for buffer to have at least 1 character in it
while (USBD_CDC_RxNum() == 0) {
__WFI();
}
// get next character
int c = UserRxBuffer[UserRxBufCur++];
return c;
}
STATIC mp_uint_t pyb_usb_vcp_ioctl(mp_obj_t self_in, mp_uint_t request, int *errcode, ...) {
va_list vargs;
va_start(vargs, errcode);
mp_uint_t ret;
if (request == MP_IOCTL_POLL) {
mp_uint_t flags = va_arg(vargs, mp_uint_t);
ret = 0;
if ((flags & MP_IOCTL_POLL_RD) && USBD_CDC_RxNum() > 0) {
ret |= MP_IOCTL_POLL_RD;
}
if ((flags & MP_IOCTL_POLL_WR) && USBD_CDC_TxHalfEmpty()) {
ret |= MP_IOCTL_POLL_WR;
}
} else {
*errcode = EINVAL;
ret = MP_STREAM_ERROR;
}
va_end(vargs);
return ret;
}
int usb_vcp_rx_num(void) {
return USBD_CDC_RxNum();
}
