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Author: Robert Underwood
Last Updated: 2011-08-21
Package Version: 1.0.0.0
Category: Measurement
Downloaded: 1004 times
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License: MIT license
Demonstration project developed for the Dallas Maxim DS1621 Digital Thermometer and Thermostat. Project defines and explains as much as to help you along with your developement with this device.
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| DOWNLOAD LINK | RELATED COMPILER | CONTAINS |
|---|---|---|
| 1313933034_ds1621_temp_sens_mikropascal_avr.zip [7.66KB] | mikroPascal PRO for AVR |
|
DALLAS MAXIM DS1621 Demo using an ATMEGA88 AVR
Demonstration project developed for the Dallas Maxim DS1621 Digital Thermometer and Thermostat. Project defines and explains as much as to help you along with your developement with this device.
Example of the Source Code showing COMMENTS
------------ CLIP ----------
ExcuteCmd(WAddress,CStatReg,POL1Shot,NilByte);
// 0x90 = Address Default address when A0,A1,A2 pins are grounded = 1001000x = x=ReadCmd(1)/WriteCmd(0)
// 0xAC=Write to the Configuration/Status Register
// 0x00= bRRRRXXab - R=Readonly bits, XX=Reserved bits, ab=Programmable
// a=POL=0=Low(output pin is normally HIGH goes LOW on ALERT,
// b=1Shot=0 force Contnuous Temp Conversion
// 0xFF Buffer Byte = NUL, Not excuted
ExcuteCmd(WAddress,THCmd,THMSB,THLSB);
ByteToStr(THMSB,CTHAStr);
LTrim(CTHAStr);
CTHAStr:='H'+CTHAStr+chr(0xDF);
// 0x90 = Address Default address when A0,A1,A2 pins are grounded = 1001000x = x=ReadCmd(1)/WriteCmd(0)
// THCmd = 0xA1=HiTemp Access(TH) CMD
// THMSB = Stores 45° C HighTemp Value = 113°F MSB (Whole Value)
// THLSB = Stores 0° C HighTemp Value = 0°F LSB (Decimal Value)
ExcuteCmd(WAddress,TLCmd,TLMSB,TLLSB);
ByteToStr(TLMSB,CTLAStr);
LTrim(CTLAStr);
CTLAStr:='L'+CTLAStr+Chr(0xDF);
// 0xA2=LoTemp Access(TL) CMD
// Stores 28° C HighTemp Value = 82°F MSB (Whole Value)
// Stores 0° C HighTemp Value = 0°F LSB (Decimal Value)
ExcuteCmd(WAddress,SConvCmd,NilByte,NilByte);
// Address Default address when A0,A1,A2 pins are grounded = 1001000x = x=ReadCmd(1)/WriteCmd(0)
// 0xEE=Initiates Temp Conversion process internally to the chip begin reading Temperatures.
Lcd_Init(); // Initialize LCD
Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off
Lcd_Cmd(_LCD_CLEAR); // Clear display
---------------------------- CLIP -------------------
