d2xx と libftdi1 の共有 d2xx のほう. static int x_ft_write(void *tt, uint8_t *data, int length) { struct d2xx *t = tt; DWORD rc; FT_STATUS s = FT_Write(t->h, data, length, &rc); assert(s == FT_OK); return rc; } static int x_ft_read(void *t…