Exemple #1
0
/*
 * Called by UART driver to send out next character.
 *
 * Interrupts disabled when nmgr_uart_tx_char/nmgr_uart_rx_char are called.
 */
static int
nmgr_uart_tx_char(void *arg)
{
    struct nmgr_uart_state *nus = (struct nmgr_uart_state *)arg;
    struct os_mbuf *m;
    uint8_t ch;

    if (!nus->nus_tx) {
        /*
         * Out of data. Return -1 makes UART stop asking for more.
         */
        return -1;
    }
    while (nus->nus_tx->om_len == nus->nus_tx_off) {
        /*
         * If no active mbuf, move to next one.
         */
        m = SLIST_NEXT(nus->nus_tx, om_next);
        os_mbuf_free(nus->nus_tx);
        nus->nus_tx = m;

        nus->nus_tx_off = 0;
        if (!nus->nus_tx) {
            return -1;
        }
    }

    os_mbuf_copydata(nus->nus_tx, nus->nus_tx_off++, 1, &ch);

    return ch;
}
Exemple #2
0
int
ble_l2cap_sig_init_cmd(uint8_t op, uint8_t id, uint8_t payload_len,
                       struct os_mbuf **out_om, void **out_payload_buf)
{
    struct ble_l2cap_sig_hdr hdr;
    struct os_mbuf *txom;
    void *v;
    int rc;

    *out_om = NULL;
    *out_payload_buf = NULL;

    txom = ble_hs_mbuf_l2cap_pkt();
    if (txom == NULL) {
        rc = BLE_HS_ENOMEM;
        goto err;
    }

    v = os_mbuf_extend(txom, BLE_L2CAP_SIG_HDR_SZ + payload_len);
    if (v == NULL) {
        rc = BLE_HS_ENOMEM;
        goto err;
    }

    hdr.op = op;
    hdr.identifier = id;
    hdr.length = TOFROMLE16(payload_len);

    ble_l2cap_sig_hdr_write(v, BLE_L2CAP_SIG_HDR_SZ, &hdr);

    *out_om = txom;
    *out_payload_buf = (uint8_t *)v + BLE_L2CAP_SIG_HDR_SZ;

    return 0;

err:
    os_mbuf_free(txom);
    return rc;
}