a4f422a801
As ESP32 has 2 I2C interfaces and BMP180 is a I2C sensor, the criterias to use BMP180 in I2C0 or I2C1 are: 1- First, bring-up routines search for BMP180 in I2C0. If BMP180 is found in I2C0, then /dev/press0 is created. 2- If BMP180 cannot be registered in I2C0, bring-up routines search for it in I2C1. If BMP180 is found in I2C1, then /dev/press0 is created. It means only one BMP180 could be suported in Nuttx. In my tests I've observed that BMP180 example application doesn't seem to work with /dev/press1 BMP180 device, therefore even BMP180 is found in I2C1, it'll be registered as /dev/press0 device.
85 lines
3.1 KiB
C
85 lines
3.1 KiB
C
/****************************************************************************
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* boards/xtensa/esp32/common/src/esp32_bmp180.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_BOARD_BMP180_H
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#define __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_BOARD_BMP180_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Type Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: board_bmp180_initialize
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*
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* Description:
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* Initialize and register the BMP180 Pressure Sensor driver.
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*
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* Input Parameters:
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* devno - The device number, used to build the device path as /dev/pressN
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* busno - The I2C bus number
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*
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* Returned Value:
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* Zero (OK) on success; a negated errno value on failure.
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*
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****************************************************************************/
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int board_bmp180_initialize(int devno, int busno);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __BOARDS_XTENSA_ESP32_COMMON_INCLUDE_BOARD_BMP180_H */
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