From de005f1b0cc0fa3bd41ad2e1cf06b9ff623fda87 Mon Sep 17 00:00:00 2001 From: Nathael Pajani Date: Thu, 15 Sep 2016 05:17:40 +0200 Subject: [PATCH] Example app for BME280 sensor driver --- i2c_bme280/Makefile | 12 ++++ i2c_bme280/README | 28 ++++++++ i2c_bme280/main.c | 163 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 203 insertions(+) create mode 100644 i2c_bme280/Makefile create mode 100644 i2c_bme280/README create mode 100644 i2c_bme280/main.c diff --git a/i2c_bme280/Makefile b/i2c_bme280/Makefile new file mode 100644 index 0000000..097ff94 --- /dev/null +++ b/i2c_bme280/Makefile @@ -0,0 +1,12 @@ +# Makefile for example apps + +MODULE = $(shell basename $(shell cd .. && pwd && cd -)) +NAME = $(shell basename $(CURDIR)) + +.PHONY: $(NAME).bin +$(NAME).bin: + @make -C ../../.. --no-print-directory NAME=$(NAME) MODULE=$(MODULE) apps/$(MODULE)/$(NAME)/$@ + +clean mrproper: + @make -C ../../.. --no-print-directory $@ + diff --git a/i2c_bme280/README b/i2c_bme280/README new file mode 100644 index 0000000..668eb65 --- /dev/null +++ b/i2c_bme280/README @@ -0,0 +1,28 @@ +BME280 I2C Barometric, humidity and temperature sensor example + +Copyright 2016 Nathael Pajani + + +/* **************************************************************************** + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + +This example shows the support of the BME280 I2C sensor. + +Periodic conversions (compensated values) are sent on UART0 using the +following frame format : +P: 986 hPa, T: 29,6 degC, H: 44,2 rH + + diff --git a/i2c_bme280/main.c b/i2c_bme280/main.c new file mode 100644 index 0000000..1b59faf --- /dev/null +++ b/i2c_bme280/main.c @@ -0,0 +1,163 @@ +/**************************************************************************** + * i2c_bme280/main.c + * + * BME280 I2C Barometric, humidity and temperature sensor example + * + * Copyright 2016 Nathael Pajani + * + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + *************************************************************************** */ + + +#include "lib/stdint.h" +#include "core/system.h" +#include "core/systick.h" +#include "core/watchdog.h" +#include "core/pio.h" +#include "lib/stdio.h" +#include "lib/errno.h" +#include "drivers/i2c.h" +#include "drivers/serial.h" +#include "drivers/gpio.h" + +#include "extdrv/bme280_humidity_sensor.h" + + +#define MODULE_VERSION 0x01 +#define MODULE_NAME "E-Xanh Gardener" + + +#define SELECTED_FREQ FREQ_SEL_36MHz + + + + +/***************************************************************************** */ +/* Pins configuration */ +/* Pins blocks are passed to set_pins() for pins configuration. + * Unused pin blocks can be removed safely with the corresponding set_pins() call + * All pins blocks may be safelly merged in a single block for single set_pins() call.. + */ +const struct pio_config common_pins[] = { + /* UART 0 */ + { LPC_GPIO_0_0, LPC_UART0_RX, 0 }, + { LPC_GPIO_0_4, LPC_UART0_TX, 0 }, + /* I2C 0 */ + { LPC_I2C0_SCL_PIO_0_10, LPC_FIXED, 0 }, + { LPC_I2C0_SDA_PIO_0_11, LPC_FIXED, 0 }, + ARRAY_LAST_PIO, +}; + + + + +/***************************************************************************** */ +/* Sensor */ + +/* Note : 8bits address */ +#define BME280_ADDR 0xEC +struct bme280_sensor_config bme280_sensor = { + .bus_num = I2C0, + .addr = BME280_ADDR, + .humidity_oversampling = BME280_OS_x16, + .temp_oversampling = BME280_OS_x16, + .pressure_oversampling = BME280_OS_x16, + .mode = BME280_NORMAL, + .standby_len = BME280_SB_62ms, + .filter_coeff = BME280_FILT_OFF, +}; + +void sensor_config(int uart_num) +{ + int ret = 0; + + ret = bme280_configure(&bme280_sensor); + if (ret != 0) { + uprintf(uart_num, "Sensor config error: %d\n", ret); + } +} + +void sensor_display(int uart_num) +{ + uint32_t pressure = 0, temp = 0; + uint16_t humidity = 0; + int ret = 0; + + ret = bme280_sensor_read(&bme280_sensor, &pressure, &temp, &humidity); + if (ret != 0) { + uprintf(uart_num, "Sensor read error: %d\n", ret); + } else { + int comp_temp = 0; + uint32_t comp_pressure = 0; + uint32_t comp_humidity = 0; + + comp_temp = bme280_compensate_temperature(&bme280_sensor, temp) / 10; + comp_pressure = bme280_compensate_pressure(&bme280_sensor, pressure) / 100; + comp_humidity = bme280_compensate_humidity(&bme280_sensor, humidity) / 10; + uprintf(uart_num, "P: %d hPa, T: %d,%02d degC, H: %d,%d rH\n", + comp_pressure, + comp_temp / 10, (comp_temp > 0) ? (comp_temp % 10) : ((-comp_temp) % 10), + comp_humidity / 10, comp_humidity % 10); + } +} + + +/***************************************************************************** */ +void system_init() +{ + system_set_default_power_state(); + clock_config(SELECTED_FREQ); + set_pins(common_pins); + gpio_on(); + /* System tick timer MUST be configured and running in order to use the sleeping + * functions */ + systick_timer_on(1); /* 1ms */ + systick_start(); +} + +/* Define our fault handler. This one is not mandatory, the dummy fault handler + * will be used when it's not overridden here. + * Note : The default one does a simple infinite loop. If the watchdog is deactivated + * the system will hang. + */ +void fault_info(const char* name, uint32_t len) +{ + uprintf(UART0, name); + while (1); +} + + + +/***************************************************************************** */ +int main(void) +{ + system_init(); + uart_on(UART0, 115200, NULL); + + + i2c_on(I2C0, I2C_CLK_100KHz, I2C_MASTER); + + /* Configure uv sensor */ + sensor_config(UART0); + + while (1) { + /* BME280 uv sensor */ + msleep(200); + sensor_display(UART0); + } + return 0; +} + -- 2.43.0