Diff: AM2321.cpp

Revision:

5:8a3cf73d7ed3

Parent:

4:e5018e5ba340

diff -r e5018e5ba340 -r 8a3cf73d7ed3 AM2321.cpp
--- a/AM2321.cpp	Thu Jun 16 08:12:33 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,202 +0,0 @@
-//
-// AM2321 Temperature & Humidity Sensor library for Arduino
-//
-// The MIT License (MIT)
-//
-// Copyright (c) 2013 Wang Dong
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-//
-
-#include "AM2321.h"
-#include "mbed.h"
-extern I2C g_i2c;
-extern Serial pc;
-
-#define I2C_ADDR_AM2321                 (0xB8 >> 1)          //AM2321温湿度计I2C地址
-#define PARAM_AM2321_READ                0x03                //读寄存器命令
-#define REG_AM2321_HUMIDITY_MSB          0x00                //湿度寄存器高位
-#define REG_AM2321_HUMIDITY_LSB          0x01                //湿度寄存器低位
-#define REG_AM2321_TEMPERATURE_MSB       0x02                //温度寄存器高位
-#define REG_AM2321_TEMPERATURE_LSB       0x03                //温度寄存器低位
-#define REG_AM2321_DEVICE_ID_BIT_24_31   0x0B                //32位设备ID高8位
-
-template<int I2CADDR, int COMMAND, int REGADDR, int REGCOUNT>
-class DataReader
-{
-protected:
-    enum { len = 32 };
-    uint8_t buf[len];
-
-protected:
-    DataReader() {
-        memset(buf, 0, len);
-    }
-    bool readRaw() {
-        //
-        // Wakeup
-        //
-        //Wire.beginTransmission(I2CADDR);
-        //Wire.endTransmission();
-        g_i2c.write(I2CADDR<<1, (char*)&buf[0], 1);
-
-        //
-        // Read Command
-        //
-#if 0
-        Wire.beginTransmission(I2CADDR);
-        Wire.write(COMMAND);
-        Wire.write(REGADDR);
-        Wire.write(REGCOUNT);
-        Wire.endTransmission();
-#else
-        char bu[3] = {COMMAND, REGADDR, REGCOUNT};
-        g_i2c.write(I2CADDR<<1, bu, 3);
-#endif
-
-        //
-        // Waiting
-        //
-        //delayMicroseconds(1600); //>1.5ms
-        wait_ms(1.6);
-
-        //
-        // Read
-        //
-#if 0
-        Wire.requestFrom(I2CADDR, 2 + REGCOUNT + 2); // COMMAND + REGCOUNT + DATA + CRCLSB + CRCMSB
-        int i = 0;
-        for (; i < 2 + REGCOUNT; ++i)
-            buf[i] = Wire.read();
-
-        unsigned short crc = 0;
-        crc  = Wire.read();     //CRC LSB
-        crc |= Wire.read() << 8;//CRC MSB
-
-        if (crc == crc16(buf, i))
-            return true;
-        return false;
-#else
-        uint8_t realAddr = (I2CADDR << 1) | 0x01;
-        //pc.printf("realAddr = 0x%x\r\n", realAddr);
-        g_i2c.read(realAddr, (char*)buf, 2 + REGCOUNT + 2);
-        unsigned short crc = 0;
-        crc  = buf[2+REGCOUNT];       //CRC LSB
-        crc |= buf[2+REGCOUNT+1] << 8;//CRC MSB
-#if 0
-        for (int i = 0; i < 2 + REGCOUNT + 2; i++) {
-            pc.printf("0x%X ", buf[i]);
-        }
-        pc.printf("\r\n");
-#endif
-        if (crc == crc16(buf, 2 + REGCOUNT))
-            return true;
-        return false;
-#endif
-    }
-
-private:
-    unsigned short crc16(unsigned char *ptr, unsigned char len) {
-        unsigned short crc = 0xFFFF;
-        unsigned char  i   = 0;
-        while(len--) {
-            crc ^= *ptr++;
-            for(i = 0 ; i < 8 ; i++) {
-                if(crc & 0x01) {
-                    crc >>= 1;
-                    crc  ^= 0xA001;
-                } else {
-                    crc >>= 1;
-                }
-            }
-        }
-        return crc;
-    }
-};
-
-class UidReader : public DataReader<I2C_ADDR_AM2321, PARAM_AM2321_READ, REG_AM2321_DEVICE_ID_BIT_24_31, 4>
-{
-public:
-    unsigned int uid;
-public:
-    bool read() {
-        if(!readRaw())
-            return false;
-        uid  = buf[2] << 24;
-        uid += buf[3] << 16;
-        uid += buf[4] << 8;
-        uid += buf[5];
-        return true;
-    }
-};
-
-class AirConditionReader : public DataReader<I2C_ADDR_AM2321, PARAM_AM2321_READ, REG_AM2321_HUMIDITY_MSB, 4>
-{
-public:
-    unsigned int humidity;
-    int temperature;
-public:
-    bool read() {
-        if(!readRaw())
-            return false;
-        humidity     = buf[2] << 8;
-        humidity    += buf[3];
-        temperature  = (buf[4]&0x7F) << 8;
-        temperature += buf[5];
-        if((buf[4]&0x80) == 0x80)
-            temperature = -temperature;
-        return true;
-    }
-};
-
-
-AM2321::AM2321()
-{
-    //Wire.begin();
-    temperature = 0;
-    humidity    = 0;
-}
-
-unsigned long AM2321::uid()
-{
-    UidReader reader;
-    if (reader.read())
-        return reader.uid;
-    return -1;
-}
-
-
-bool AM2321::available()
-{
-    return !(temperature == 0 && humidity == 0);
-}
-
-bool AM2321::read()
-{
-    AirConditionReader reader;
-    if (reader.read()) {
-        temperature = reader.temperature;
-        humidity = reader.humidity;
-        return true;
-    }
-    return false;
-}
-//
-// END OF FILE
-//