void talk_hid()

in uf2tool/tool.c [119:137]

• 17 lines of code
• 6 McCabe index (conditional complexity)

void talk_hid(HID_Dev *pkt, int cmd, const void *data, uint32_t len) {
    if (len >= sizeof(pkt->buf) - 8)
        fatal("buffer overflow");
    if (data)
        memcpy(pkt->buf + 8, data, len);
    write32(pkt->buf, cmd);
    write16(pkt->buf + 4, ++pkt->seqNo);
    write16(pkt->buf + 6, 0);
    send_hid(pkt->dev, pkt->buf, 8 + len);

    if (cmd == HF2_CMD_RESET_INTO_APP)
        return; // no response expected

    recv_hid(pkt, -1);
    if (read16(pkt->buf) != pkt->seqNo)
        fatal("invalid sequence number");
    if (read16(pkt->buf + 2))
        fatal("invalid status");
}