IPR_ADCBUFHALFFULL
epcm->capture_ipr = IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL;
if (status & IPR_ADCBUFHALFFULL) {
if (status & (IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL)) {
status &= ~(IPR_ADCBUFFULL|IPR_ADCBUFHALFFULL);