83 lines
3 KiB
C
83 lines
3 KiB
C
|
/*
|
||
|
|
* Driver for Bosch Sensortec BME680 digital temperature, humidity, pressure
|
||
|
|
* and gas sensor connected to I2C or SPI
|
||
|
|
*
|
||
|
|
* This driver is for the usage with the ESP8266 and FreeRTOS (esp-open-rtos)
|
||
|
|
* [https://github.com/SuperHouse/esp-open-rtos]. It is also working with ESP32
|
||
|
|
* and ESP-IDF [https://github.com/espressif/esp-idf.git] as well as Linux
|
||
|
|
* based systems using a wrapper library for ESP8266 functions.
|
||
|
|
*
|
||
|
|
* ---------------------------------------------------------------------------
|
||
|
|
*
|
||
|
|
* The BSD License (3-clause license)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2017 Gunar Schorcht (https://github.com/gschorcht)
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions are met:
|
||
|
|
*
|
||
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
||
|
|
* this list of conditions and the following disclaimer.
|
||
|
|
*
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived from this
|
||
|
|
* software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Platform file: platform specific definitions, includes and functions
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "bme680_platform.h"
|
||
|
|
|
||
|
|
// platform specific SPI functions
|
||
|
|
|
||
|
|
static const spi_settings_t bus_settings = {
|
||
|
|
.mode = SPI_MODE0,
|
||
|
|
.freq_divider = SPI_FREQ_DIV_1M,
|
||
|
|
.msb = true,
|
||
|
|
.minimal_pins = false,
|
||
|
|
.endianness = SPI_LITTLE_ENDIAN
|
||
|
|
};
|
||
|
|
|
||
|
|
bool spi_device_init (uint8_t bus, uint8_t cs)
|
||
|
|
{
|
||
|
|
gpio_enable(cs, GPIO_OUTPUT);
|
||
|
|
gpio_write (cs, true);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t spi_transfer_pf(uint8_t bus, uint8_t cs, const uint8_t *mosi, uint8_t *miso, uint16_t len)
|
||
|
|
{
|
||
|
|
spi_settings_t old_settings;
|
||
|
|
|
||
|
|
spi_get_settings(bus, &old_settings);
|
||
|
|
spi_set_settings(bus, &bus_settings);
|
||
|
|
gpio_write(cs, false);
|
||
|
|
|
||
|
|
size_t transfered = spi_transfer (bus, (const void*)mosi, (void*)miso, len, SPI_8BIT);
|
||
|
|
|
||
|
|
gpio_write(cs, true);
|
||
|
|
spi_set_settings(bus, &old_settings);
|
||
|
|
|
||
|
|
return transfered;
|
||
|
|
}
|
||
|
|
|