UCOM_JITTERBUF_SIZE
UCOM_JITTERBUF_SIZE - 1;
if (end >= UCOM_JITTERBUF_SIZE)
end -= UCOM_JITTERBUF_SIZE;
if (pos >= UCOM_JITTERBUF_SIZE)
pos -= UCOM_JITTERBUF_SIZE;
if (pos >= UCOM_JITTERBUF_SIZE)
pos -= UCOM_JITTERBUF_SIZE;
uint8_t sc_jitterbuf[UCOM_JITTERBUF_SIZE];