mirror of
https://github.com/thelsing/knx.git
synced 2024-12-18 19:08:18 +01:00
37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
|
/*
|
||
|
|
* datapoint_types.h - Conversion functions for datapoint types.
|
||
|
|
*
|
||
|
|
* Copyright (c) 2014 Stefan Taferner <stefan.taferner@gmx.at>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 3 as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* An invalid 2 uint8_t float (DPT9/EIS5).
|
||
|
|
* To be used for dptToFloat() and dptFromFloat().
|
||
|
|
*/
|
||
|
|
#define INVALID_DPT_FLOAT 2147483647U
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Convert a value from uint32_t to 2 uint8_t float (DPT9/EIS5). The possible range
|
||
|
|
* of the values is -67108864 to 67076096.
|
||
|
|
*
|
||
|
|
* @param value - the value to convert.
|
||
|
|
* Use INVALID_DPT_FLOAT for the DPT9 "invalid data" value.
|
||
|
|
* @return The 2 uint8_t float (DPT9/EIS5).
|
||
|
|
*/
|
||
|
|
uint16_t dptToFloat(int32_t value);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Convert a value from 2 uint8_t float (DPT9/EIS5) to integer.
|
||
|
|
*
|
||
|
|
* @param dptValue - the 2 uint8_t float (DPT9/EIS5) to convert
|
||
|
|
* @return The value as integer, or INVALID_DPT_FLOAT for the
|
||
|
|
* DPT9 "invalid data" value.
|
||
|
|
*/
|
||
|
|
int32_t dptFromFloat(uint16_t dptValue);
|