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drivers/ds18: Add Maxim Integrated ds18 driver #6512

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drivers/ds18: Add Maxim Integrated ds18 driver #6512

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phectori
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This patch adds the driver for the Maxim Integrated ds1822 and ds18b20 temperature sensors. These sensors use one-wire as communication protocol and can be powered using the data-line.

Currently I have only tested the ds1822, but according to the datasheet they should be software compatible.

The driver is SAUL compatible.

@aabadie aabadie self-assigned this Jan 28, 2017
@aabadie aabadie added the Area: drivers Area: Device drivers label Jan 28, 2017
@aabadie aabadie added this to the Release 2017.04 milestone Jan 28, 2017
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aabadie requested changes Feb 3, 2017
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Changes looks good in general. I just have a few minor comments.
Will test on the sensor I have.

Thanks for proposing this PR btw :)

drivers/ds18/ds18.c Outdated

#include "log.h"
#include "periph/gpio.h"
#include "timex.h"
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include not needed

drivers/include/ds18.h Outdated
/**
* @brief export SAUL endpoint
*/
extern const saul_driver_t ds18_temperature_saul_driver;
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This is not needed

drivers/include/ds18.h Outdated
#define DS18_TEMP_H

#include "periph/gpio.h"
#include "saul.h"
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include not required

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aabadie commented Feb 3, 2017

Just noticed that an application for this is missing in the tests. tests/driver_ds18x will be fine.

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aabadie commented Feb 3, 2017

Tested ds18b20 an on arduino-zero with pin 12 (PA, 19) but the sensor returns incorrect values (163.77°C, this is not good, trust me ;) ).

On which board did you try ?

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aabadie commented Mar 1, 2017

ping @phectori, any chance for an update ?

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phectori commented Mar 1, 2017 •
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@aabadie Yes. I have tested the driver on an Arduino and got the same result as you. Haven't had the time to figure out why yet. I tested the driver on a nucleo board before.

Regarding the test; Is a SAUL test (using something like: USEMODULE=ds18x BOARD=<your board> make) not enough? A dedicated test wouldn't be more than that in the current state of the driver.

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phectori commented Mar 1, 2017

Removed the unnecessary includes/code you pointed out before and rebased.

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aabadie commented Mar 23, 2017

ping @phectori, any progress on your side ?

@aabadie aabadie added the Type: new feature The issue requests / The PR implemements a new feature for RIOT label Mar 23, 2017
@kaspar030 kaspar030 modified the milestone: Release 2017.04 Apr 21, 2017
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aabadie commented Jun 7, 2017

@phectori still no progress on your side ?

@jnohlgard jnohlgard added the Area: SAUL Area: Sensor/Actuator Uber Layer label Feb 19, 2018
@kaspar030 kaspar030 removed this from the Release 2018.04 milestone Apr 11, 2018
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Closed due to inactivity of author,

@tcschmidt tcschmidt closed this May 26, 2018
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Tested ds18b20 an on arduino-zero with pin 12 (PA, 19) but the sensor returns incorrect values (163.77°C, this is not good, trust me ;) ).

@aabadie I think I found the problem. Apparently the time measurement on the ds18_read_bit was not ok (could this be due to a problem with xtimer?). So by reducing the DS18_SAMPLE_TIME now I get correct measurements. I am testing this on the lobaro-lorabox board.

If it's ok I will take over this PR and write the missing test application.

@leandrolanzieri leandrolanzieri mentioned this pull request Sep 21, 2018
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Tested ds18b20 an on arduino-zero with pin 12 (PA, 19) but the sensor returns incorrect values (163.77°C, this is not good, trust me ;) ).

@aabadie I think I found the problem. Apparently the time measurement on the ds18_read_bit was not ok (could this be due to a problem with xtimer?). So by reducing the DS18_SAMPLE_TIME now I get correct measurements. I am testing this on the lobaro-lorabox board.

If it's ok I will take over this PR and write the missing test application.

Yes please! Good luck with writing the test application.

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@phectori @aabadie @tcschmidt @leandrolanzieri @jnohlgard @kaspar030 @smlng