FT232H NeoPixel for string art

neopixel_144.ipynb

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   "source": [
    "\n",
    "## Import libftd2xx and others"
   ]
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   "cell_type": "code",
   "execution_count": 2,
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   "source": [
    ":dep libftd2xx\n",
    ":dep convert-base\n",
    "use convert_base::Convert;\n",
    "use libftd2xx::{Ftdi, FtdiCommon, BitMode};"
   ]
  },
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## open FTDI FT2232H"
   ]
  },
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   "cell_type": "code",
   "execution_count": 26,
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     "text": [
      "Device information: DeviceInfo { port_open: true, speed: None, device_type: FT232H, vendor_id: 0x0403, product_id: 0x6015, serial_number: MLRHTR, description: USB <-> Serial Converter }\n"
     ]
    }
   ],
   "source": [
    "let mut ft = Ftdi::new()?;\n",
    "//let mut ft = Ftdi::with_serial_number(\"MLTS91A\")?; //use FTDI \n",
    "let info = ft.device_info()?;\n",
    "println!(\"Device information: {:?}\", info);"
   ]
  },
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   "source": [
    "### **defered** "
   ]
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   "outputs": [],
   "source": [
    "ft.close()"
   ]
  },
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   "cell_type": "markdown",
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   "source": [
    "## Neopixel functions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [],
   "source": [
    "fn make_byte(a :u8) -> Vec<u8>{\n",
    "    let mut b = Convert::new(255,2); //color value to binary\n",
    "    let mut out = b.convert::<u8,u8>(&[a]);\n",
    "    out.resize_with(8,Default::default);//pad with zero to 8-BIT \n",
    "    out.reverse(); //MSB..LSB\n",
    "    \n",
    "    let mut k = Vec::new();\n",
    "    for x in out.chunks(2){ //every 2-bit to one SPI byte\n",
    "        match x {\n",
    "            [0,0] => k.push(0x88),\n",
    "            [0,1] => k.push(0x8C),\n",
    "            [1,0] => k.push(0xC8),\n",
    "            [1,1] => k.push(0xCC),\n",
    "            _ =>(),\n",
    "        }    \n",
    "    }\n",
    "    k\n",
    "}\n",
    "\n",
    "fn make_grb(g:u8,r:u8,b:u8)->Vec<u8>{\n",
    "    [make_byte(g),make_byte(r),make_byte(b)].concat()\n",
    "}\n",
    "\n",
    "const LED_OFF:u8 = 136; //make_byte(0)[0];\n",
    "\n",
    "fn modify_grb_array(mut f:[u8;12*144],led_index:usize,g:u8,r:u8,b:u8) -> [u8;12*144] {\n",
    "    let a:usize = led_index*12;\n",
    "    for (i,v) in (a..(a+12)).enumerate() {\n",
    "        f[v] = make_grb(g,r,b)[i];\n",
    "    }\n",
    "        \n",
    "    return f\n",
    "}\n",
    "\n",
    "fn three_led(head:usize, middle:usize, tail:usize) ->[u8;12*144] {    \n",
    "    let mut k = modify_grb_array([LED_OFF;12*144],head,0,10,0);//red\n",
    "    let mut k = modify_grb_array(k, middle,10,0,0);//green\n",
    "    let mut k = modify_grb_array(k, tail,0,0,10);//blue\n",
    "    return k\n",
    "}\n"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Send SPI to Neopixel"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [],
   "source": [
    "const MOSI:u8 = 0x02u8; //AD1\n",
    "const SCK:u8 = 0x01u8; //AD0\n",
    "\n",
    "ft.set_bit_mode(0, BitMode::Mpsse);\n",
    "ft.write(&[0x8A, 0x86,11,0]); //400ns per bit\n",
    "\n",
    "fn write_tuple(ft:&mut Ftdi, r:usize,g:usize,b:usize){\n",
    "    let a = three_led(r,g,b).to_vec();\n",
    "    let b = (a.len()-1) as u16;\n",
    "    ft.write(&([vec![0x80,0,MOSI+SCK,0x11,(b & 0xff) as u8,(b>>8) as u8],a].concat()));\n",
    "}"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## write RGB tuple"
   ]
  },
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   "cell_type": "code",
   "execution_count": 32,
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   "source": [
    "write_tuple(&mut ft, 1,10,100)"
   ]
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     "execution_count": 33,
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   "source": [
    "write_tuple(&mut ft, 100,15,12)"
   ]
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   "execution_count": 34,
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     "execution_count": 34,
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   "source": [
    "write_tuple(&mut ft, 12,16,50)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
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