ESC_STAT_INTERRUPT_PENDING
if (*rp->esc.esc_status & ESC_STAT_INTERRUPT_PENDING) {
} while((*rp->esc.esc_status & ESC_STAT_INTERRUPT_PENDING)
while(*rp->esc_status & ESC_STAT_INTERRUPT_PENDING) {
while(!(*rp->esc_status & ESC_STAT_INTERRUPT_PENDING));
while(!(*esc_status & ESC_STAT_INTERRUPT_PENDING));
while(!(*esc_status & ESC_STAT_INTERRUPT_PENDING));
if (!(*rp->esc_status & ESC_STAT_INTERRUPT_PENDING)) {