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Dependencies:   SX1276Lib AdaFruit_RGBLCD MCP23017 mbed

Fork of AdaFruit_RGBLCD by Justin Howard

Modules/TempModule.cpp@21:c44cfd3259c0, 2014-09-02 (annotated)

Committer:
vtraveller
Date:
Tue Sep 02 07:12:23 2014 +0000
Revision:
21:c44cfd3259c0
Parent:
20:93c70a1869ee 
Changed to using a shared I2C object

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vtraveller 10:3fcab08717fc 1 #include "mbed.h"
vtraveller 10:3fcab08717fc 2 #include "TempModule.h"
vtraveller 10:3fcab08717fc 3
vtraveller 10:3fcab08717fc 4 #include "extra_chars.h"
vtraveller 10:3fcab08717fc 5
vtraveller 21:c44cfd3259c0 6 #define MCP9808_I2CADDR_DEFAULT (0x18 << 1)
vtraveller 20:93c70a1869ee 7 #define MCP9808_REG_CONFIG 0x01
vtraveller 20:93c70a1869ee 8
vtraveller 20:93c70a1869ee 9 #define MCP9808_REG_CONFIG_SHUTDOWN 0x0100
vtraveller 20:93c70a1869ee 10 #define MCP9808_REG_CONFIG_CRITLOCKED 0x0080
vtraveller 20:93c70a1869ee 11 #define MCP9808_REG_CONFIG_WINLOCKED 0x0040
vtraveller 20:93c70a1869ee 12 #define MCP9808_REG_CONFIG_INTCLR 0x0020
vtraveller 20:93c70a1869ee 13 #define MCP9808_REG_CONFIG_ALERTSTAT 0x0010
vtraveller 20:93c70a1869ee 14 #define MCP9808_REG_CONFIG_ALERTCTRL 0x0008
vtraveller 20:93c70a1869ee 15 #define MCP9808_REG_CONFIG_ALERTSEL 0x0002
vtraveller 20:93c70a1869ee 16 #define MCP9808_REG_CONFIG_ALERTPOL 0x0002
vtraveller 20:93c70a1869ee 17 #define MCP9808_REG_CONFIG_ALERTMODE 0x0001
vtraveller 20:93c70a1869ee 18
vtraveller 20:93c70a1869ee 19 #define MCP9808_REG_UPPER_TEMP 0x02
vtraveller 20:93c70a1869ee 20 #define MCP9808_REG_LOWER_TEMP 0x03
vtraveller 20:93c70a1869ee 21 #define MCP9808_REG_CRIT_TEMP 0x04
vtraveller 20:93c70a1869ee 22 #define MCP9808_REG_AMBIENT_TEMP 0x05
vtraveller 20:93c70a1869ee 23 #define MCP9808_REG_MANUF_ID 0x06
vtraveller 20:93c70a1869ee 24 #define MCP9808_REG_DEVICE_ID 0x07
vtraveller 20:93c70a1869ee 25
vtraveller 21:c44cfd3259c0 26 TempModule::TempModule(Serial & in_cDisplay,I2C & in_nI2C,uint8_t in_nAddress)
vtraveller 13:9641bc42db92 27 : Module(in_cDisplay)
vtraveller 21:c44cfd3259c0 28 , m_cI2C(in_nI2C)
vtraveller 21:c44cfd3259c0 29 , m_nAddress(in_nAddress)
vtraveller 21:c44cfd3259c0 30 , m_bValid(false)
vtraveller 10:3fcab08717fc 31 {
vtraveller 20:93c70a1869ee 32 uint16_t nManufacturer = read16(MCP9808_REG_MANUF_ID);// != 0x0054) return false;
vtraveller 20:93c70a1869ee 33 uint16_t nDeviceId = read16(MCP9808_REG_DEVICE_ID);//
vtraveller 20:93c70a1869ee 34
vtraveller 20:93c70a1869ee 35 // Check to see if we need to autoscan for our device
vtraveller 21:c44cfd3259c0 36 m_bValid = (0x0054 == nManufacturer || 0x0400 == nDeviceId);
vtraveller 21:c44cfd3259c0 37
vtraveller 21:c44cfd3259c0 38 // bool bAutoScan = true;
vtraveller 21:c44cfd3259c0 39 // m_nAddress = 0;
vtraveller 21:c44cfd3259c0 40 //
vtraveller 21:c44cfd3259c0 41 // while (bAutoScan && m_nAddress < 0x80)
vtraveller 21:c44cfd3259c0 42 // {
vtraveller 21:c44cfd3259c0 43 // nManufacturer = read16(MCP9808_REG_MANUF_ID);// != 0x0054) return false;
vtraveller 21:c44cfd3259c0 44 // nDeviceId = read16(MCP9808_REG_DEVICE_ID);//
vtraveller 21:c44cfd3259c0 45 //
vtraveller 21:c44cfd3259c0 46 // bAutoScan = (0x0054 != nManufacturer || 0x0400 != nDeviceId);
vtraveller 21:c44cfd3259c0 47 // m_nAddress++;
vtraveller 21:c44cfd3259c0 48 // }
vtraveller 10:3fcab08717fc 49 }
vtraveller 10:3fcab08717fc 50
vtraveller 10:3fcab08717fc 51 TempModule::~TempModule()
vtraveller 10:3fcab08717fc 52 {
vtraveller 10:3fcab08717fc 53 }
vtraveller 11:96146db429de 54
vtraveller 20:93c70a1869ee 55 float TempModule::readTempC()
vtraveller 11:96146db429de 56 {
vtraveller 20:93c70a1869ee 57 uint16_t t = read16(MCP9808_REG_AMBIENT_TEMP);
vtraveller 20:93c70a1869ee 58
vtraveller 20:93c70a1869ee 59 float temp = t & 0x0FFF;
vtraveller 20:93c70a1869ee 60 temp /= 16.0f;
vtraveller 20:93c70a1869ee 61
vtraveller 20:93c70a1869ee 62 // check to see if signed bit set
vtraveller 20:93c70a1869ee 63 if (t & 0x1000) temp -= 0xff;
vtraveller 10:3fcab08717fc 64
vtraveller 20:93c70a1869ee 65 return temp;
vtraveller 20:93c70a1869ee 66 }
vtraveller 20:93c70a1869ee 67
vtraveller 20:93c70a1869ee 68 void TempModule::write16(uint8_t in_nRegister, uint16_t in_nValue)
vtraveller 20:93c70a1869ee 69 {
vtraveller 20:93c70a1869ee 70 char aBuffer[3] = { in_nRegister, in_nValue >> 8, in_nValue & 0xFF };
vtraveller 20:93c70a1869ee 71 m_cI2C.write(MCP9808_I2CADDR_DEFAULT, aBuffer, sizeof(aBuffer));
vtraveller 11:96146db429de 72 }
vtraveller 11:96146db429de 73
vtraveller 20:93c70a1869ee 74 uint16_t TempModule::read16(uint8_t in_nRegister)
vtraveller 10:3fcab08717fc 75 {
vtraveller 20:93c70a1869ee 76 m_cI2C.write(m_nAddress, (const char *)&in_nRegister, sizeof(in_nRegister));
vtraveller 10:3fcab08717fc 77
vtraveller 20:93c70a1869ee 78 char aReadBuffer[2];
vtraveller 20:93c70a1869ee 79 m_cI2C.read(m_nAddress, aReadBuffer, sizeof(aReadBuffer));
vtraveller 20:93c70a1869ee 80
vtraveller 20:93c70a1869ee 81 return (aReadBuffer[0] << 8) | aReadBuffer[1];
vtraveller 10:3fcab08717fc 82 }
vtraveller 10:3fcab08717fc 83
vtraveller 20:93c70a1869ee 84 void TempModule::show(bool in_bRefresh)
vtraveller 10:3fcab08717fc 85 {
vtraveller 20:93c70a1869ee 86 static time_t nTime = time(NULL) + 1;
vtraveller 20:93c70a1869ee 87 if (in_bRefresh || nTime < time(NULL))
vtraveller 20:93c70a1869ee 88 {
vtraveller 20:93c70a1869ee 89 m_cDisplay.printf("Room: %0.1f%cC ",readTempC(),eDegree);
vtraveller 20:93c70a1869ee 90
vtraveller 20:93c70a1869ee 91 // uint8_t nValue = read16(MCP9808_REG_MANUF_ID);
vtraveller 20:93c70a1869ee 92 // m_cDisplay.printf("%x - %x - %x ", m_nAddress, nValue,read16(MCP9808_REG_DEVICE_ID));
vtraveller 20:93c70a1869ee 93
vtraveller 20:93c70a1869ee 94 nTime = time(NULL) + 1;
vtraveller 20:93c70a1869ee 95 }
vtraveller 10:3fcab08717fc 96 }