Commit 399c5385 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

Add DS2482-100 Single-Channel 1-Wire Master driver

parent 9fd36d9c

include/driver/ds2482.h

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 *

 * DS2482-100 Single-Channel 1-Wire Master

 */

#pragma once



class DS2482 {

	private:

		DS2482(const DS2482 &copy);

		unsigned char const address;

		unsigned char txbuf[2];

		unsigned char rxbuf[1];



	public:

		DS2482(unsigned char const addr) : address(addr) {}



		void setup();

		void busReset();

		unsigned char status();

		void readROM(unsigned char *data, unsigned char len);

};



extern DS2482 ds2482;

src/app/datalogger/main.cc

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@@ -33,6 +33,9 @@ 
#ifdef CONFIG_driver_ccs811

#include "driver/ccs811.h"

#endif

#ifdef CONFIG_driver_ds2482

#include "driver/ds2482.h"

#endif

#ifdef CONFIG_driver_max44009

#include "driver/max44009.h"

#endif
@@ -103,6 +106,20 @@ void loop(void) 
	kout << "CCS811 tVOC / eCO₂ : " << ccs811.tvoc << " ppb / " << ccs811.eco2 << " ppm" << endl;

#endif



#ifdef CONFIG_driver_ds2482

	unsigned char addr[8];

	ds2482.readROM(addr, 8);

	kout << hex << "DS2482 ROM address: ";

	for (unsigned char i = 0; i < 8; i++) {

		kout << (unsigned int)addr[i];

	}

	kout << " / ";

	for (signed char i = 7; i >= 0; i--) {

		kout << (unsigned int)addr[i];

	}

	kout << endl;

#endif



#ifdef CONFIG_driver_hdc1080

	/*

	hdc1080.heater(1);
@@ -223,6 +240,10 @@ int main(void) 
	arch.delay_ms(50);

#endif



#ifdef CONFIG_driver_ds2482

	ds2482.setup();

#endif



#ifdef CONFIG_driver_hdc1080

	hdc1080.init();

	if (hdc1080.getManufacturerID() != 0x5449) {

src/driver/Kconfig

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@@ -37,6 +37,10 @@ depends on meta_driver_i2c && !driver_bme280 && (arch_arduino_nano || arch_msp43 


# ccs811 is broken and incomplete



config driver_ds2482

bool "DS2482-100 Single-Channel 1-Wire Master"

depends on meta_driver_i2c



# dummy is AEMR-specific and not included in Kconfig



config driver_eeprom24lc64

src/driver/ds2482.cc

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/*

 * Copyright 2021 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 *

 * DS2482-100 Single-Channel 1-Wire Master

 */

#include "driver/ds2482.h"

#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(CONFIG_driver_softi2c)

#include "driver/i2c.h"

#else

#include "driver/soft_i2c.h"

#endif

#include "arch.h"



void DS2482::setup()

{

	txbuf[0] = 0xf0;

	i2c.xmit(address, 1, txbuf, 0, rxbuf);

	txbuf[0] = 0xd2;

	txbuf[1] = 0xf0; // default setting: passive pull-up, standard speed

	i2c.xmit(address, 2, txbuf, 0, rxbuf);

}



void DS2482::busReset()

{

	txbuf[0] = 0xb4;

	i2c.xmit(address, 1, txbuf, 0, rxbuf);

}



unsigned char DS2482::status()

{

	txbuf[0] = 0xe1;

	txbuf[0] = 0xf0;

	i2c.xmit(address, 2, txbuf, 1, rxbuf);

	return rxbuf[0];

}



void DS2482::readROM(unsigned char *data, unsigned char len)

{

	busReset();

	arch.delay_ms(2); // reset low time (630us) + reset high time (614us)

	txbuf[0] = 0xa5;

	txbuf[1] = 0x33;

	i2c.xmit(address, 2, txbuf, 0, rxbuf);

	arch.delay_us(800);

	for (unsigned char i = 0; i < len; i++) {

		txbuf[0] = 0x96;

		i2c.xmit(address, 1, txbuf, 0, rxbuf);

		arch.delay_us(800);

		txbuf[0] = 0xe1;

		txbuf[1] = 0xe1;

		i2c.xmit(address, 2, txbuf, 1, rxbuf);

		data[i] = rxbuf[0];

	}

}



DS2482 ds2482(0x18);