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Add ds18b20 udp broadcaster example.

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Add license and readme details.
Rid of compile-time switches.
Rid of lazy initialization of sensor.
Minor code fixing.
This commit is contained in:
Grzegorz Hetman 2016-02-18 13:51:16 +01:00
parent 1da8626e6e
commit 72f30ad950
13 changed files with 278 additions and 102 deletions
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22
extras/ds18b20/LICENSE Normal file
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@ -0,0 +1,22 @@
The MIT License (MIT)
Copyright (c) 2016 Grzegorz Hetman : ghetman@gmail.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

20
extras/ds18b20/ds18b20.c
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@ -13,14 +13,8 @@
#define DS1820_ALARMSEARCH 0xEC
#define DS1820_CONVERT_T 0x44
uint8_t readDS18B20(uint8_t pin, DSENSOR *result){
static uint8_t one_time = 1;
uint8_t readDS18B20(uint8_t pin, ds_sensor_t *result){
if (one_time){
onewire_init(pin);
one_time = 0;
}
uint8_t addr[8];
uint8_t sensor_id = 0;
onewire_reset_search(pin);
@ -34,11 +28,11 @@ uint8_t readDS18B20(uint8_t pin, DSENSOR *result){
onewire_reset(pin);
onewire_select(pin, addr);
onewire_write(pin, DS1820_CONVERT_T, owDefaultPower);
onewire_write(pin, DS1820_CONVERT_T, ONEWIRE_DEFAULT_POWER);
sdk_os_delay_us(750);
onewire_reset(pin);
onewire_select(pin, addr);
onewire_write(pin, DS1820_READ_SCRATCHPAD, owDefaultPower);
onewire_write(pin, DS1820_READ_SCRATCHPAD, ONEWIRE_DEFAULT_POWER);
uint8_t get[10];
@ -75,14 +69,14 @@ float read_single_DS18B20(uint8_t pin){
onewire_init(pin);
onewire_reset(pin);
onewire_write(pin, DS1820_SKIP_ROM, owDefaultPower);
onewire_write(pin, DS1820_CONVERT_T, owDefaultPower);
onewire_write(pin, DS1820_SKIP_ROM, ONEWIRE_DEFAULT_POWER);
onewire_write(pin, DS1820_CONVERT_T, ONEWIRE_DEFAULT_POWER);
sdk_os_delay_us(750);
onewire_reset(pin);
onewire_write(pin, DS1820_SKIP_ROM, owDefaultPower);
onewire_write(pin, DS1820_READ_SCRATCHPAD, owDefaultPower);
onewire_write(pin, DS1820_SKIP_ROM, ONEWIRE_DEFAULT_POWER);
onewire_write(pin, DS1820_READ_SCRATCHPAD, ONEWIRE_DEFAULT_POWER);
uint8_t get[10];

8
extras/ds18b20/ds18b20.h
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@ -1,17 +1,17 @@
#ifndef DRIVER_DS18B20_H_
#define DRIVER_DS18B20_H_
typedef struct DSENSOR {
typedef struct {
uint8_t id;
uint8_t major;
uint8_t minor;
} DSENSOR;
} ds_sensor_t;
// Scan all ds18b20 sensors on bus and return its amount.
// Result are saved in array of DSENSOR structure.
// Result are saved in array of ds_sensor_t structure.
// Cause printf in esp sdk don`t support float,
// I split result as two number (major, minor).
uint8_t readDS18B20(uint8_t pin, DSENSOR *result);
uint8_t readDS18B20(uint8_t pin, ds_sensor_t *result);
// This method is just to demonstrate how to read
// temperature from single dallas chip.