LEDCNT_BLINK
vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP|LEDCNT_BLINK);
vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP|LEDCNT_BLINK);
vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP|LEDCNT_BLINK);
if (ledstate&LEDCNT_BLINK) { /* currently processing */