不韋 呂 / UIT_ADT7410

I2C 接続の温度センサ ADT7410 用のライブラリ． Library for temperature sensor ADT7410 connected using I2C interface.

Dependents:   Mbed2_ConnectTestAll Demo_ADT7410

ADT7410.cpp@7:990e3c54ac51, 2020-04-16 (annotated)

Committer:
MikamiUitOpen
Date:
Thu Apr 16 04:28:59 2020 +0000
Revision:
7:990e3c54ac51
Parent:
6:438204ab1793 
8

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:b6dc7c54b451 1 //--------------------------------------------------------------
MikamiUitOpen 7:990e3c54ac51 2 // ADT7410 クラスのメンバ関数の定義
MikamiUitOpen 5:bbcd91ba7c6b 3 //
MikamiUitOpen 7:990e3c54ac51 4 // 2020/04/16, Copyright (c) 2020 MIKAMI, Naoki
MikamiUitOpen 0:b6dc7c54b451 5 //--------------------------------------------------------------
MikamiUitOpen 0:b6dc7c54b451 6
MikamiUitOpen 0:b6dc7c54b451 7 #include "ADT7410.hpp"
MikamiUitOpen 0:b6dc7c54b451 8
MikamiUitOpen 0:b6dc7c54b451 9 namespace Mikami
MikamiUitOpen 0:b6dc7c54b451 10 {
MikamiUitOpen 7:990e3c54ac51 11 // コンストラクタ
MikamiUitOpen 0:b6dc7c54b451 12 ADT7410::ADT7410(PinName sda, PinName scl, uint8_t addr)
MikamiUitOpen 7:990e3c54ac51 13 : ADDR_(addr), i2cPtr_(new I2C(sda, scl)), i2c_(*i2cPtr_)
MikamiUitOpen 7:990e3c54ac51 14 { Reset(); }
MikamiUitOpen 7:990e3c54ac51 15
MikamiUitOpen 7:990e3c54ac51 16 // 外部の I2C オブジェクトを与えるコンストラクタ
MikamiUitOpen 7:990e3c54ac51 17 ADT7410::ADT7410(I2C &i2c, uint8_t addr)
MikamiUitOpen 7:990e3c54ac51 18 : ADDR_(addr), i2cPtr_(NULL), i2c_(i2c)
MikamiUitOpen 5:bbcd91ba7c6b 19 { Reset(); }
MikamiUitOpen 0:b6dc7c54b451 20
MikamiUitOpen 7:990e3c54ac51 21 // コンフィギュレーション･レジスタの設定
MikamiUitOpen 7:990e3c54ac51 22 // ADT7410 のデータシートの Figure 15 参照
MikamiUitOpen 7:990e3c54ac51 23 void ADT7410::SetConfig(char val) const
MikamiUitOpen 0:b6dc7c54b451 24 {
MikamiUitOpen 7:990e3c54ac51 25 TxRegAddr(CONFIG_, true);
MikamiUitOpen 7:990e3c54ac51 26 i2c_.write(val);
MikamiUitOpen 7:990e3c54ac51 27 i2c_.stop();
MikamiUitOpen 0:b6dc7c54b451 28 }
MikamiUitOpen 5:bbcd91ba7c6b 29
MikamiUitOpen 7:990e3c54ac51 30 // 温度の読み込み
MikamiUitOpen 7:990e3c54ac51 31 // ADT7410 のデータシートの Figure 18 参照
MikamiUitOpen 7:990e3c54ac51 32 float ADT7410::Read() const
MikamiUitOpen 0:b6dc7c54b451 33 {
MikamiUitOpen 7:990e3c54ac51 34 TxRegAddr(TEMPER_, true);
MikamiUitOpen 7:990e3c54ac51 35 i2c_.start();
MikamiUitOpen 7:990e3c54ac51 36 i2c_.write(ADDR_ | 0x01);
MikamiUitOpen 7:990e3c54ac51 37 uint8_t valH = i2c_.read(1);
MikamiUitOpen 7:990e3c54ac51 38 int16_t value = (valH << 8) | i2c_.read(0);
MikamiUitOpen 7:990e3c54ac51 39 i2c_.stop();
MikamiUitOpen 5:bbcd91ba7c6b 40
MikamiUitOpen 2:c134a43c7875 41 if ( (GetConfig() & 0x80) == 0x00 )
MikamiUitOpen 7:990e3c54ac51 42 value &= 0xfff8; // 分解能: 13 ビットの場合
MikamiUitOpen 0:b6dc7c54b451 43 return value/128.0f;
MikamiUitOpen 0:b6dc7c54b451 44 }
MikamiUitOpen 0:b6dc7c54b451 45
MikamiUitOpen 7:990e3c54ac51 46 // リセット
MikamiUitOpen 7:990e3c54ac51 47 // ADT7410 のデータシート Rev.A の p.19 参照
MikamiUitOpen 7:990e3c54ac51 48 void ADT7410::Reset() const
MikamiUitOpen 0:b6dc7c54b451 49 {
MikamiUitOpen 7:990e3c54ac51 50 TxRegAddr(RESET_);
MikamiUitOpen 0:b6dc7c54b451 51 wait_ms(250);
MikamiUitOpen 7:990e3c54ac51 52 // 分解能: 13 ビット，continuous 変換モード に設定
MikamiUitOpen 2:c134a43c7875 53 SetConfig(0x00);
MikamiUitOpen 0:b6dc7c54b451 54 }
MikamiUitOpen 7:990e3c54ac51 55
MikamiUitOpen 7:990e3c54ac51 56 // ADT7410 内部レジスタのアドレスの送信
MikamiUitOpen 7:990e3c54ac51 57 void ADT7410::TxRegAddr(uint8_t reg, bool repeated) const
MikamiUitOpen 7:990e3c54ac51 58 {
MikamiUitOpen 7:990e3c54ac51 59 i2c_.start();
MikamiUitOpen 7:990e3c54ac51 60 i2c_.write(ADDR_);
MikamiUitOpen 7:990e3c54ac51 61 i2c_.write(reg);
MikamiUitOpen 7:990e3c54ac51 62 if (!repeated) i2c_.stop();
MikamiUitOpen 7:990e3c54ac51 63 }
MikamiUitOpen 7:990e3c54ac51 64
MikamiUitOpen 7:990e3c54ac51 65 // ADT7410 の内部レジスタの 1 バイトの読み込み
MikamiUitOpen 7:990e3c54ac51 66 uint8_t ADT7410::GetReg(Reg addr) const
MikamiUitOpen 7:990e3c54ac51 67 {
MikamiUitOpen 7:990e3c54ac51 68 TxRegAddr(addr, true);
MikamiUitOpen 7:990e3c54ac51 69 i2c_.start();
MikamiUitOpen 7:990e3c54ac51 70 i2c_.write(ADDR_ | 0x01);
MikamiUitOpen 7:990e3c54ac51 71 uint8_t val = i2c_.read(0);
MikamiUitOpen 7:990e3c54ac51 72 i2c_.stop();
MikamiUitOpen 7:990e3c54ac51 73 return val;
MikamiUitOpen 7:990e3c54ac51 74 }
MikamiUitOpen 6:438204ab1793 75 }