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DS18X20 One Wire Library

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Author: Richard Lowe

Last Updated: 2013-09-19

Package Version: 1.0.0.3

Category: Measurement

Downloaded: 3479 times

Followed by: 1 user

License: MIT license

Easily add DS18x20 sensor functions to your project.

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Download All [13.30KB]

[older versions]

DOWNLOAD LINK	RELATED COMPILER	CONTAINS
1379611841_ds18x20_one_wire_mikroc_avr.mpkg [25.15KB]	mikroC PRO for AVR	lib src exa hlp hex sch pcb doc
1379611862_ds18x20_one_wire_mikroc_arm.mpkg [35.09KB]	mikroC PRO for ARM	lib src exa hlp hex sch pcb doc

Library Blog

This is the first version. This library assumes that it is the only sensor on the bus. Sensor addressing is not yet supported.

Requirements: stdbool ( boolean definition file ) found on libstock

To use this library, you will need to edit the header file and define your port and pin.

Example:
//#define DS18X20_BASE_ADDRESS &PORTA
//#define DS18X20_PIN 3
#define DS18X20_BASE_ADDRESS &GPIOA_BASE
#define DS18X20_PIN 3

The example file included shows 2 different methods the library supports, polled and immediate.

Temp sensors are SLOW. On a 8Mhz AVR with resolution set at 10 you will achieve 5-6 readings per second. If the reading is not critical, then using the polled method works best.

There is also a formatted string function: ds18x20_get_str_temp( DS18X20_MODE_C ); that produces a formatted string based on MODE_C or MODE_F.

UPDATE:

Forgot about compiling into a library and macros....

This new version has a different initialization:

Example:

#include "ds18x20.h"

#define msg( txt ) UART1_Write_Text( txt )

void main()

{

ds18x20_config_t sensor;

char txt_buffer[50];

sensor.port = &PORTA;

sensor.pin = 7;

sensor.resolution = RES12;

sensor.alarm_high = 0x22;

sensor.alarm_low = 0x01;

UART1_Init( 38400 );

Delay_ms( 100 );

ds18x20_init( &sensor );

while(1)

{

sprintf( txt_buffer, "Temp is: %f\r\n", ds18x20_get_temp() );

msg( txt_buffer );

Delay_ms( 1000 );

}

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