This commit enables BMP180 suport for ESP32.
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.
This commit is contained in:
Pedro Bertoleti
Alan Carvalho de Assis
parent
3850df7a78
commit
a4f422a801
84
boards/xtensa/esp32/common/include/esp32_bmp180.h
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84
boards/xtensa/esp32/common/include/esp32_bmp180.h
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@ -0,0 +1,84 @@
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/****************************************************************************
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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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@ -30,6 +30,10 @@ ifeq ($(CONFIG_I2C_DRIVER),y)
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CSRCS += esp32_board_i2c.c
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endif
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ifeq ($(CONFIG_SENSORS_BMP180),y)
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CSRCS += esp32_bmp180.c
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endif
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DEPPATH += --dep-path src
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VPATH += :src
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CFLAGS += $(shell $(INCDIR) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)src)
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110
boards/xtensa/esp32/common/src/esp32_bmp180.c
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110
boards/xtensa/esp32/common/src/esp32_bmp180.c
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@ -0,0 +1,110 @@
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/****************************************************************************
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* boards/xtensa/esp32/common/src/esp32_bmp180.c
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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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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <nuttx/arch.h>
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#include <nuttx/sensors/bmp180.h>
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#include <nuttx/i2c/i2c_master.h>
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#include "esp32_board_i2c.h"
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#include "esp32_i2c.h"
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#include "esp32_bmp180.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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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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{
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struct i2c_master_s *i2c;
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char devpath[12];
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int ret;
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sninfo("Initializing BMP180!\n");
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/* Initialize BMP180 */
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i2c = esp32_i2cbus_initialize(busno);
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if (i2c)
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{
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/* Then try to register the barometer sensor in I2C0 */
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snprintf(devpath, 12, "/dev/press%d", devno);
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ret = bmp180_register(devpath, i2c);
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if (ret < 0)
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{
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snerr("ERROR: Error registering BMP180 in I2C%d\n", busno);
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}
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}
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else
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{
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ret = -ENODEV;
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}
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return ret;
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}
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@ -92,3 +92,11 @@ A new image "esp32_qemu_image.bin" will be created. It can be run as:
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-machine esp32 \
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-drive file=esp32_qemu_image.bin,if=mtd,format=raw
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External devices:
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=================
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BMP180
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------
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When using BMP180 (enabling CONFIG_SENSORS_BMP180), it's expected this device is wired to I2C0 bus.
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The current bring-up routines doesn't allow BMP180 device to be used in I2C1 bus.
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@ -60,6 +60,10 @@
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# include "esp32_board_i2c.h"
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#endif
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#ifdef CONFIG_SENSORS_BMP180
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# include "esp32_bmp180.h"
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#endif
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#include "esp32-wrover-kit.h"
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/****************************************************************************
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@ -259,6 +263,19 @@ int esp32_bringup(void)
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}
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#endif
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#ifdef CONFIG_SENSORS_BMP180
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/* Try to register BMP180 device in I2C0 */
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ret = board_bmp180_initialize(0, 0);
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if (ret < 0)
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{
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syslog(LOG_ERR, "Failed to initialize BMP180"
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"Driver for I2C0: %d\n", ret);
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return ret;
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}
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#endif
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#endif
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/* If we got here then perhaps not all initialization was successful, but
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@ -269,3 +286,4 @@ int esp32_bringup(void)
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UNUSED(ret);
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return OK;
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}
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