FT2232 with SHT21

FT2232H_I2C_SHT21.ipynb

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 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Import libftd2xx"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    ":dep libftd2xx"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "use libftd2xx::{Ftdi, FtdiCommon, BitMode};\n",
    "use std::time::Duration;\n",
    "use std::thread;"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## open FTDI FT2232H with serial number"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Device information: DeviceInfo { port_open: true, speed: None, device_type: FT2232H, vendor_id: 0x0403, product_id: 0x6010, serial_number: MLTS91A, description: FT2232H MiniModule A }\n"
     ]
    }
   ],
   "source": [
    "//let mut ft = Ftdi::new()?;\n",
    "\n",
    "let mut ft = Ftdi::with_serial_number(\"MLTS91A\")?; //use FTDI \n",
    "let info = ft.device_info()?;\n",
    "println!(\"Device information: {:?}\", info);"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### **defered**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ft.close()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## functions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [],
   "source": [
    "const SCK:u8 = 0x01u8; //AD0 \n",
    "const SDO:u8 = 0x02u8;//AD1\n",
    "\n",
    "pub trait I2C: FtdiCommon {\n",
    "    fn init_i2c(&mut self){\n",
    "        self.set_bit_mode(0, BitMode::Reset);\n",
    "        self.set_bit_mode(0, BitMode::Mpsse);\n",
    "        self.write(&[0x8A, 0x97, 0x8C, 0x86,200,0,0x85]); //200 for 100k I2C bit rate      \n",
    "        self.write(&[0x80,SCK+SDO,SCK+SDO]);//both high\n",
    "    }\n",
    "    \n",
    "    fn start_i2c(&mut self){\n",
    "        self.write(&[0x80,SCK+SDO,SCK+SDO]);\n",
    "        self.write(&[0x80,SCK,SCK+SDO]); //SDA falling edge\n",
    "        self.write(&[0x80,0,SCK+SDO]); //zero both\n",
    "    }\n",
    "    \n",
    "    fn stop_i2c(&mut self){     \n",
    "        self.write(&[0x80,0,SCK+SDO]); //zero both\n",
    "        self.write(&[0x80,SCK,SCK+SDO]); //sck up first\n",
    "        self.write(&[0x80,SCK+SDO,SCK+SDO]); //SDA rising edge\n",
    "        self.write(&[0x80,0,0]); //release bus\n",
    "    }\n",
    "        \n",
    "    \n",
    "    fn read_sht21(&mut self) -> [u8;3]{\n",
    "        self.write(&[0x80,0,SCK,0x20,0,0,0x80,SDO,SDO+SCK, 0x13,0,0]); // ftdi ack\n",
    "        self.write(&[0x80,0,SCK,0x20,0,0,0x80,SDO,SDO+SCK, 0x13,0,0]); // ftdi ack\n",
    "        self.write(&[0x80,0,SCK,0x20,0,0,0x80,SDO,SDO+SCK, 0x13,0,0xff,0x80,0,SCK,0x87]); //ftdi nack     \n",
    "        let mut buf:[u8;3] = [0;3];\n",
    "        self.read(&mut buf);\n",
    "        buf        \n",
    "    }\n",
    "    \n",
    "    fn send_byte(&mut self, byte_to_send: u8) -> bool {                \n",
    "        self.write(&[0x11u8, 0,0, byte_to_send,0x80,0,SCK,0x22,0,0x87]); //-ve byte out        \n",
    "        let mut buf:[u8;1] = [0;1];\n",
    "        self.read(&mut buf);\n",
    "        self.write(&vec![0x80,SDO, SDO+SCK]);\n",
    "        println!(\"{}\",buf[0]);\n",
    "        if buf[0] & 1u8 != 0u8{\n",
    "            return false\n",
    "        }else{\n",
    "            return true\n",
    "        }\n",
    "    }\n",
    "    fn read_t(&mut self)->f64{\n",
    "        self.start_i2c();\n",
    "        self.send_byte(0x80);\n",
    "        self.send_byte(0xf3);\n",
    "        self.stop_i2c(); \n",
    "        thread::sleep(Duration::from_millis(100));\n",
    "        self.start_i2c();\n",
    "        self.send_byte(0x81);\n",
    "        let mut r = self.read_sht21();\n",
    "        self.stop_i2c();\n",
    "        ((r[0] as f64)*256.0 + (r[1] as f64)) * 175.72/2f64.powi(16) -46.85\n",
    "    }\n",
    "    fn read_rh(&mut self)->f64{\n",
    "        self.start_i2c();\n",
    "        self.send_byte(0x80);\n",
    "        self.send_byte(0xf5);\n",
    "        self.stop_i2c(); \n",
    "        thread::sleep(Duration::from_millis(100));\n",
    "        self.start_i2c();\n",
    "        self.send_byte(0x81);\n",
    "        let mut r = self.read_sht21();\n",
    "        self.stop_i2c();\n",
    "        ((r[0] as f64)*256.0 + (r[1] as f64)) * 125.0/2f64.powi(16)-6.0\n",
    "    }\n",
    "    \n",
    "}\n",
    "impl I2C for Ftdi {}"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "()"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ft.init_i2c()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### measure temperature and RH"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "234\n",
      "212\n",
      "168\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "22.6700830078125"
      ]
     },
     "execution_count": 34,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ft.read_t()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "242\n",
      "228\n",
      "200\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "28.381866455078125"
      ]
     },
     "execution_count": 37,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "ft.read_rh()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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