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/*
* Copyright 2021 Birte Kristina Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*
* DS2482-100 Single-Channel 1-Wire Master
*/
#include "driver/ds2482.h"
#if defined(CONFIG_meta_driver_hardware_i2c)
#include "driver/i2c.h"
#elif defined (CONFIG_driver_softi2c)
#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);
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