464 lines
15 KiB
C
464 lines
15 KiB
C
|
/*
|
||
|
|
Created by Chris Morgan based on the nodemcu project driver.
|
||
|
|
Copyright 2017 Chris Morgan <chmorgan@gmail.com>
|
||
|
|
|
||
|
|
Ported to ESP32 RMT peripheral for low-level signal generation by Arnim Laeuger.
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
Much of the code was inspired by Derek Yerger's code, though I don't
|
||
|
|
think much of that remains. In any event that was..
|
||
|
|
(copyleft) 2006 by Derek Yerger - Free to distribute freely.
|
||
|
|
|
||
|
|
The CRC code was excerpted and inspired by the Dallas Semiconductor
|
||
|
|
sample code bearing this copyright.
|
||
|
|
//---------------------------------------------------------------------------
|
||
|
|
// Copyright (C) 2000 Dallas Semiconductor Corporation, All Rights Reserved.
|
||
|
|
//
|
||
|
|
// 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 DALLAS SEMICONDUCTOR 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.
|
||
|
|
//
|
||
|
|
// Except as contained in this notice, the name of Dallas Semiconductor
|
||
|
|
// shall not be used except as stated in the Dallas Semiconductor
|
||
|
|
// Branding Policy.
|
||
|
|
//--------------------------------------------------------------------------
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "owb.h"
|
||
|
|
|
||
|
|
#include "driver/rmt.h"
|
||
|
|
#include "driver/gpio.h"
|
||
|
|
#include "esp_log.h"
|
||
|
|
|
||
|
|
#undef OW_DEBUG
|
||
|
|
|
||
|
|
|
||
|
|
// bus reset: duration of low phase [us]
|
||
|
|
#define OW_DURATION_RESET 480
|
||
|
|
// overall slot duration
|
||
|
|
#define OW_DURATION_SLOT 75
|
||
|
|
// write 1 slot and read slot durations [us]
|
||
|
|
#define OW_DURATION_1_LOW 2
|
||
|
|
#define OW_DURATION_1_HIGH (OW_DURATION_SLOT - OW_DURATION_1_LOW)
|
||
|
|
// write 0 slot durations [us]
|
||
|
|
#define OW_DURATION_0_LOW 65
|
||
|
|
#define OW_DURATION_0_HIGH (OW_DURATION_SLOT - OW_DURATION_0_LOW)
|
||
|
|
// sample time for read slot
|
||
|
|
#define OW_DURATION_SAMPLE (15-2)
|
||
|
|
// RX idle threshold
|
||
|
|
// needs to be larger than any duration occurring during write slots
|
||
|
|
#define OW_DURATION_RX_IDLE (OW_DURATION_SLOT + 2)
|
||
|
|
|
||
|
|
|
||
|
|
static const char * TAG = "owb_rmt";
|
||
|
|
|
||
|
|
#define info_of_driver(owb) container_of(owb, owb_rmt_driver_info, bus)
|
||
|
|
|
||
|
|
// flush any pending/spurious traces from the RX channel
|
||
|
|
static void onewire_flush_rmt_rx_buf(const OneWireBus * bus)
|
||
|
|
{
|
||
|
|
void *p;
|
||
|
|
size_t s;
|
||
|
|
|
||
|
|
owb_rmt_driver_info *i = info_of_driver(bus);
|
||
|
|
|
||
|
|
while ((p = xRingbufferReceive(i->rb, &s, 0)))
|
||
|
|
{
|
||
|
|
ESP_LOGD(TAG, "flushing entry");
|
||
|
|
vRingbufferReturnItem(i->rb, p);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static owb_status _reset(const OneWireBus *bus, bool *is_present)
|
||
|
|
{
|
||
|
|
rmt_item32_t tx_items[1];
|
||
|
|
bool _is_present = false;
|
||
|
|
int res = OWB_STATUS_OK;
|
||
|
|
|
||
|
|
owb_rmt_driver_info *i = info_of_driver(bus);
|
||
|
|
|
||
|
|
tx_items[0].duration0 = OW_DURATION_RESET;
|
||
|
|
tx_items[0].level0 = 0;
|
||
|
|
tx_items[0].duration1 = 0;
|
||
|
|
tx_items[0].level1 = 1;
|
||
|
|
|
||
|
|
uint16_t old_rx_thresh;
|
||
|
|
rmt_get_rx_idle_thresh(i->rx_channel, &old_rx_thresh);
|
||
|
|
rmt_set_rx_idle_thresh(i->rx_channel, OW_DURATION_RESET+60);
|
||
|
|
|
||
|
|
onewire_flush_rmt_rx_buf(bus);
|
||
|
|
rmt_rx_start(i->rx_channel, true);
|
||
|
|
if (rmt_write_items(i->tx_channel, tx_items, 1, true) == ESP_OK)
|
||
|
|
{
|
||
|
|
size_t rx_size;
|
||
|
|
rmt_item32_t* rx_items = (rmt_item32_t *)xRingbufferReceive(i->rb, &rx_size, 100 / portTICK_PERIOD_MS);
|
||
|
|
|
||
|
|
if (rx_items)
|
||
|
|
{
|
||
|
|
if (rx_size >= (1 * sizeof(rmt_item32_t)))
|
||
|
|
{
|
||
|
|
#ifdef OW_DEBUG
|
||
|
|
ESP_LOGI(TAG, "rx_size: %d", rx_size);
|
||
|
|
|
||
|
|
for (int i = 0; i < (rx_size / sizeof(rmt_item32_t)); i++)
|
||
|
|
{
|
||
|
|
ESP_LOGI(TAG, "i: %d, level0: %d, duration %d", i, rx_items[i].level0, rx_items[i].duration0);
|
||
|
|
ESP_LOGI(TAG, "i: %d, level1: %d, duration %d", i, rx_items[i].level1, rx_items[i].duration1);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// parse signal and search for presence pulse
|
||
|
|
if ((rx_items[0].level0 == 0) && (rx_items[0].duration0 >= OW_DURATION_RESET - 2))
|
||
|
|
{
|
||
|
|
if ((rx_items[0].level1 == 1) && (rx_items[0].duration1 > 0))
|
||
|
|
{
|
||
|
|
if (rx_items[1].level0 == 0)
|
||
|
|
{
|
||
|
|
_is_present = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
vRingbufferReturnItem(i->rb, (void *)rx_items);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// time out occurred, this indicates an unconnected / misconfigured bus
|
||
|
|
ESP_LOGE(TAG, "rx_items == 0");
|
||
|
|
res = OWB_STATUS_HW_ERROR;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// error in tx channel
|
||
|
|
ESP_LOGE(TAG, "Error tx");
|
||
|
|
res = OWB_STATUS_HW_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
rmt_rx_stop(i->rx_channel);
|
||
|
|
rmt_set_rx_idle_thresh(i->rx_channel, old_rx_thresh);
|
||
|
|
|
||
|
|
*is_present = _is_present;
|
||
|
|
|
||
|
|
ESP_LOGD(TAG, "_is_present %d", _is_present);
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
static rmt_item32_t _encode_write_slot(uint8_t val)
|
||
|
|
{
|
||
|
|
rmt_item32_t item;
|
||
|
|
|
||
|
|
item.level0 = 0;
|
||
|
|
item.level1 = 1;
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
// write "1" slot
|
||
|
|
item.duration0 = OW_DURATION_1_LOW;
|
||
|
|
item.duration1 = OW_DURATION_1_HIGH;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// write "0" slot
|
||
|
|
item.duration0 = OW_DURATION_0_LOW;
|
||
|
|
item.duration1 = OW_DURATION_0_HIGH;
|
||
|
|
}
|
||
|
|
|
||
|
|
return item;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** NOTE: The data is shifted out of the low bits, eg. it is written in the order of lsb to msb */
|
||
|
|
static owb_status _write_bits(const OneWireBus * bus, uint8_t out, int number_of_bits_to_write)
|
||
|
|
{
|
||
|
|
rmt_item32_t tx_items[number_of_bits_to_write + 1];
|
||
|
|
owb_rmt_driver_info *info = info_of_driver(bus);
|
||
|
|
|
||
|
|
if (number_of_bits_to_write > 8)
|
||
|
|
{
|
||
|
|
return OWB_STATUS_TOO_MANY_BITS;
|
||
|
|
}
|
||
|
|
|
||
|
|
// write requested bits as pattern to TX buffer
|
||
|
|
for (int i = 0; i < number_of_bits_to_write; i++)
|
||
|
|
{
|
||
|
|
tx_items[i] = _encode_write_slot(out & 0x01);
|
||
|
|
out >>= 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
// end marker
|
||
|
|
tx_items[number_of_bits_to_write].level0 = 1;
|
||
|
|
tx_items[number_of_bits_to_write].duration0 = 0;
|
||
|
|
|
||
|
|
owb_status status;
|
||
|
|
|
||
|
|
if (rmt_write_items(info->tx_channel, tx_items, number_of_bits_to_write+1, true) == ESP_OK)
|
||
|
|
{
|
||
|
|
status = OWB_STATUS_OK;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
status = OWB_STATUS_HW_ERROR;
|
||
|
|
ESP_LOGE(TAG, "rmt_write_items() failed");
|
||
|
|
}
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
static rmt_item32_t _encode_read_slot(void)
|
||
|
|
{
|
||
|
|
rmt_item32_t item;
|
||
|
|
|
||
|
|
// construct pattern for a single read time slot
|
||
|
|
item.level0 = 0;
|
||
|
|
item.duration0 = OW_DURATION_1_LOW; // shortly force 0
|
||
|
|
item.level1 = 1;
|
||
|
|
item.duration1 = OW_DURATION_1_HIGH; // release high and finish slot
|
||
|
|
return item;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** NOTE: Data is read into the high bits, eg. each bit read is shifted down before the next bit is read */
|
||
|
|
static owb_status _read_bits(const OneWireBus * bus, uint8_t *in, int number_of_bits_to_read)
|
||
|
|
{
|
||
|
|
rmt_item32_t tx_items[number_of_bits_to_read + 1];
|
||
|
|
uint8_t read_data = 0;
|
||
|
|
int res = OWB_STATUS_OK;
|
||
|
|
|
||
|
|
owb_rmt_driver_info *info = info_of_driver(bus);
|
||
|
|
|
||
|
|
if (number_of_bits_to_read > 8)
|
||
|
|
{
|
||
|
|
ESP_LOGE(TAG, "_read_bits() OWB_STATUS_TOO_MANY_BITS");
|
||
|
|
return OWB_STATUS_TOO_MANY_BITS;
|
||
|
|
}
|
||
|
|
|
||
|
|
// generate requested read slots
|
||
|
|
for (int i = 0; i < number_of_bits_to_read; i++)
|
||
|
|
{
|
||
|
|
tx_items[i] = _encode_read_slot();
|
||
|
|
}
|
||
|
|
|
||
|
|
// end marker
|
||
|
|
tx_items[number_of_bits_to_read].level0 = 1;
|
||
|
|
tx_items[number_of_bits_to_read].duration0 = 0;
|
||
|
|
|
||
|
|
onewire_flush_rmt_rx_buf(bus);
|
||
|
|
rmt_rx_start(info->rx_channel, true);
|
||
|
|
if (rmt_write_items(info->tx_channel, tx_items, number_of_bits_to_read+1, true) == ESP_OK)
|
||
|
|
{
|
||
|
|
size_t rx_size;
|
||
|
|
rmt_item32_t* rx_items = (rmt_item32_t *)xRingbufferReceive(info->rb, &rx_size, portMAX_DELAY);
|
||
|
|
|
||
|
|
if (rx_items)
|
||
|
|
{
|
||
|
|
#ifdef OW_DEBUG
|
||
|
|
for (int i = 0; i < rx_size / 4; i++)
|
||
|
|
{
|
||
|
|
ESP_LOGI(TAG, "level: %d, duration %d", rx_items[i].level0, rx_items[i].duration0);
|
||
|
|
ESP_LOGI(TAG, "level: %d, duration %d", rx_items[i].level1, rx_items[i].duration1);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (rx_size >= number_of_bits_to_read * sizeof(rmt_item32_t))
|
||
|
|
{
|
||
|
|
for (int i = 0; i < number_of_bits_to_read; i++)
|
||
|
|
{
|
||
|
|
read_data >>= 1;
|
||
|
|
// parse signal and identify logical bit
|
||
|
|
if (rx_items[i].level1 == 1)
|
||
|
|
{
|
||
|
|
if ((rx_items[i].level0 == 0) && (rx_items[i].duration0 < OW_DURATION_SAMPLE))
|
||
|
|
{
|
||
|
|
// rising edge occured before 15us -> bit 1
|
||
|
|
read_data |= 0x80;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
read_data >>= 8 - number_of_bits_to_read;
|
||
|
|
}
|
||
|
|
|
||
|
|
vRingbufferReturnItem(info->rb, (void *)rx_items);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// time out occurred, this indicates an unconnected / misconfigured bus
|
||
|
|
ESP_LOGE(TAG, "rx_items == 0");
|
||
|
|
res = OWB_STATUS_HW_ERROR;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// error in tx channel
|
||
|
|
ESP_LOGE(TAG, "Error tx");
|
||
|
|
res = OWB_STATUS_HW_ERROR;
|
||
|
|
}
|
||
|
|
|
||
|
|
rmt_rx_stop(info->rx_channel);
|
||
|
|
|
||
|
|
*in = read_data;
|
||
|
|
return res;
|
||
|
|
}
|
||
|
|
|
||
|
|
static owb_status _uninitialize(const OneWireBus *bus)
|
||
|
|
{
|
||
|
|
owb_rmt_driver_info * info = info_of_driver(bus);
|
||
|
|
|
||
|
|
rmt_driver_uninstall(info->tx_channel);
|
||
|
|
rmt_driver_uninstall(info->rx_channel);
|
||
|
|
|
||
|
|
return OWB_STATUS_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct owb_driver rmt_function_table =
|
||
|
|
{
|
||
|
|
.name = "owb_rmt",
|
||
|
|
.uninitialize = _uninitialize,
|
||
|
|
.reset = _reset,
|
||
|
|
.write_bits = _write_bits,
|
||
|
|
.read_bits = _read_bits
|
||
|
|
};
|
||
|
|
|
||
|
|
static owb_status _init(owb_rmt_driver_info *info, uint8_t gpio_num,
|
||
|
|
rmt_channel_t tx_channel, rmt_channel_t rx_channel)
|
||
|
|
{
|
||
|
|
owb_status status = OWB_STATUS_HW_ERROR;
|
||
|
|
|
||
|
|
// Ensure the RMT peripheral is not already running
|
||
|
|
// Note: if using RMT elsewhere, don't call this here, call it at the start of your prgoram instead.
|
||
|
|
//periph_module_disable(PERIPH_RMT_MODULE);
|
||
|
|
//periph_module_enable(PERIPH_RMT_MODULE);
|
||
|
|
|
||
|
|
info->bus.driver = &rmt_function_table;
|
||
|
|
info->tx_channel = tx_channel;
|
||
|
|
info->rx_channel = rx_channel;
|
||
|
|
info->gpio = gpio_num;
|
||
|
|
|
||
|
|
#ifdef OW_DEBUG
|
||
|
|
ESP_LOGI(TAG, "RMT TX channel: %d", info->tx_channel);
|
||
|
|
ESP_LOGI(TAG, "RMT RX channel: %d", info->rx_channel);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
rmt_config_t rmt_tx;
|
||
|
|
rmt_tx.channel = info->tx_channel;
|
||
|
|
rmt_tx.gpio_num = gpio_num;
|
||
|
|
rmt_tx.mem_block_num = 1;
|
||
|
|
rmt_tx.clk_div = 80;
|
||
|
|
rmt_tx.tx_config.loop_en = false;
|
||
|
|
rmt_tx.tx_config.carrier_en = false;
|
||
|
|
rmt_tx.tx_config.idle_level = 1;
|
||
|
|
rmt_tx.tx_config.idle_output_en = true;
|
||
|
|
rmt_tx.rmt_mode = RMT_MODE_TX;
|
||
|
|
if (rmt_config(&rmt_tx) == ESP_OK)
|
||
|
|
{
|
||
|
|
if (rmt_driver_install(rmt_tx.channel, 0, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_SHARED) == ESP_OK)
|
||
|
|
{
|
||
|
|
rmt_config_t rmt_rx;
|
||
|
|
rmt_rx.channel = info->rx_channel;
|
||
|
|
rmt_rx.gpio_num = gpio_num;
|
||
|
|
rmt_rx.clk_div = 80;
|
||
|
|
rmt_rx.mem_block_num = 1;
|
||
|
|
rmt_rx.rmt_mode = RMT_MODE_RX;
|
||
|
|
rmt_rx.rx_config.filter_en = true;
|
||
|
|
rmt_rx.rx_config.filter_ticks_thresh = 30;
|
||
|
|
rmt_rx.rx_config.idle_threshold = OW_DURATION_RX_IDLE;
|
||
|
|
if (rmt_config(&rmt_rx) == ESP_OK)
|
||
|
|
{
|
||
|
|
if (rmt_driver_install(rmt_rx.channel, 512, ESP_INTR_FLAG_LOWMED | ESP_INTR_FLAG_IRAM | ESP_INTR_FLAG_SHARED) == ESP_OK)
|
||
|
|
{
|
||
|
|
rmt_get_ringbuf_handle(info->rx_channel, &info->rb);
|
||
|
|
status = OWB_STATUS_OK;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ESP_LOGE(TAG, "failed to install rx driver");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
status = OWB_STATUS_HW_ERROR;
|
||
|
|
ESP_LOGE(TAG, "failed to configure rx, uninstalling rmt driver on tx channel");
|
||
|
|
rmt_driver_uninstall(rmt_tx.channel);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ESP_LOGE(TAG, "failed to install tx driver");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ESP_LOGE(TAG, "failed to configure tx");
|
||
|
|
}
|
||
|
|
|
||
|
|
// attach GPIO to previous pin
|
||
|
|
if (gpio_num < 32)
|
||
|
|
{
|
||
|
|
GPIO.enable_w1ts = (0x1 << gpio_num);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
GPIO.enable1_w1ts.data = (0x1 << (gpio_num - 32));
|
||
|
|
}
|
||
|
|
|
||
|
|
// attach RMT channels to new gpio pin
|
||
|
|
// ATTENTION: set pin for rx first since gpio_output_disable() will
|
||
|
|
// remove rmt output signal in matrix!
|
||
|
|
rmt_set_pin(info->rx_channel, RMT_MODE_RX, gpio_num);
|
||
|
|
rmt_set_pin(info->tx_channel, RMT_MODE_TX, gpio_num);
|
||
|
|
|
||
|
|
// force pin direction to input to enable path to RX channel
|
||
|
|
PIN_INPUT_ENABLE(GPIO_PIN_MUX_REG[gpio_num]);
|
||
|
|
|
||
|
|
// enable open drain
|
||
|
|
GPIO.pin[gpio_num].pad_driver = 1;
|
||
|
|
|
||
|
|
return status;
|
||
|
|
}
|
||
|
|
|
||
|
|
OneWireBus * owb_rmt_initialize(owb_rmt_driver_info *info, uint8_t gpio_num,
|
||
|
|
rmt_channel_t tx_channel, rmt_channel_t rx_channel)
|
||
|
|
{
|
||
|
|
ESP_LOGD(TAG, "%s: gpio_num: %d, tx_channel: %d, rx_channel: %d",
|
||
|
|
__func__, gpio_num, tx_channel, rx_channel);
|
||
|
|
|
||
|
|
owb_status status = _init(info, gpio_num, tx_channel, rx_channel);
|
||
|
|
if(status != OWB_STATUS_OK)
|
||
|
|
{
|
||
|
|
ESP_LOGE(TAG, "_init() failed with status %d", status);
|
||
|
|
}
|
||
|
|
|
||
|
|
return &(info->bus);
|
||
|
|
}
|