Example program using the sensors on the MAXWSNENV board.
Dependencies: BMP180 Si7020 mbed
Fork of MAXWSNENV_sensors by
main.cpp@0:aa46c0e0e4a0, 2015-04-20 (annotated)
- Committer:
- kgills
- Date:
- Mon Apr 20 17:57:50 2015 +0000
- Revision:
- 0:aa46c0e0e4a0
- Child:
- 4:67b2c47ef52d
Initial commit.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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kgills | 0:aa46c0e0e4a0 | 1 | /* mbed Microcontroller Library |
kgills | 0:aa46c0e0e4a0 | 2 | * Copyright (c) 2006-2013 ARM Limited |
kgills | 0:aa46c0e0e4a0 | 3 | * |
kgills | 0:aa46c0e0e4a0 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
kgills | 0:aa46c0e0e4a0 | 5 | * you may not use this file except in compliance with the License. |
kgills | 0:aa46c0e0e4a0 | 6 | * You may obtain a copy of the License at |
kgills | 0:aa46c0e0e4a0 | 7 | * |
kgills | 0:aa46c0e0e4a0 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
kgills | 0:aa46c0e0e4a0 | 9 | * |
kgills | 0:aa46c0e0e4a0 | 10 | * Unless required by applicable law or agreed to in writing, software |
kgills | 0:aa46c0e0e4a0 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
kgills | 0:aa46c0e0e4a0 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
kgills | 0:aa46c0e0e4a0 | 13 | * See the License for the specific language governing permissions and |
kgills | 0:aa46c0e0e4a0 | 14 | * limitations under the License. |
kgills | 0:aa46c0e0e4a0 | 15 | */ |
kgills | 0:aa46c0e0e4a0 | 16 | |
kgills | 0:aa46c0e0e4a0 | 17 | #include <string.h> |
kgills | 0:aa46c0e0e4a0 | 18 | #include "mbed.h" |
kgills | 0:aa46c0e0e4a0 | 19 | #include "BMP180.h" |
kgills | 0:aa46c0e0e4a0 | 20 | #include "Si7020.h" |
kgills | 0:aa46c0e0e4a0 | 21 | |
kgills | 0:aa46c0e0e4a0 | 22 | // User I/O objects |
kgills | 0:aa46c0e0e4a0 | 23 | DigitalOut red(LED_RED, LED_OFF); |
kgills | 0:aa46c0e0e4a0 | 24 | |
kgills | 0:aa46c0e0e4a0 | 25 | // Sensor objects |
kgills | 0:aa46c0e0e4a0 | 26 | I2C i2c(I2C_SDA, I2C_SCL); |
kgills | 0:aa46c0e0e4a0 | 27 | AnalogIn light_ain(AIN_0D); |
kgills | 0:aa46c0e0e4a0 | 28 | DigitalOut light_en(P0_2, 1); |
kgills | 0:aa46c0e0e4a0 | 29 | |
kgills | 0:aa46c0e0e4a0 | 30 | BMP180 bmp180(&i2c); |
kgills | 0:aa46c0e0e4a0 | 31 | Si7020 si7020(&i2c); |
kgills | 0:aa46c0e0e4a0 | 32 | |
kgills | 0:aa46c0e0e4a0 | 33 | int currentPressure; |
kgills | 0:aa46c0e0e4a0 | 34 | float currentHumidity; |
kgills | 0:aa46c0e0e4a0 | 35 | float currentTemperature; |
kgills | 0:aa46c0e0e4a0 | 36 | float currentLight; |
kgills | 0:aa46c0e0e4a0 | 37 | |
kgills | 0:aa46c0e0e4a0 | 38 | // ***************************************************************************** |
kgills | 0:aa46c0e0e4a0 | 39 | int main(void) |
kgills | 0:aa46c0e0e4a0 | 40 | { |
kgills | 0:aa46c0e0e4a0 | 41 | printf("\n\nEnvironmental sensor demo\n"); |
kgills | 0:aa46c0e0e4a0 | 42 | |
kgills | 0:aa46c0e0e4a0 | 43 | /* Setup BMP180 */ |
kgills | 0:aa46c0e0e4a0 | 44 | while(bmp180.init() != 0) { |
kgills | 0:aa46c0e0e4a0 | 45 | printf("Failed to initialize barometer\n"); |
kgills | 0:aa46c0e0e4a0 | 46 | wait(1); |
kgills | 0:aa46c0e0e4a0 | 47 | } |
kgills | 0:aa46c0e0e4a0 | 48 | |
kgills | 0:aa46c0e0e4a0 | 49 | while (true) { |
kgills | 0:aa46c0e0e4a0 | 50 | |
kgills | 0:aa46c0e0e4a0 | 51 | // Start non-blocking readings |
kgills | 0:aa46c0e0e4a0 | 52 | bmp180.startPressure(BMP180::STANDARD); |
kgills | 0:aa46c0e0e4a0 | 53 | si7020.startHumidity(); |
kgills | 0:aa46c0e0e4a0 | 54 | |
kgills | 0:aa46c0e0e4a0 | 55 | // Toggle LED and wait between readings |
kgills | 0:aa46c0e0e4a0 | 56 | red = 1; |
kgills | 0:aa46c0e0e4a0 | 57 | wait(1); |
kgills | 0:aa46c0e0e4a0 | 58 | red = 0; |
kgills | 0:aa46c0e0e4a0 | 59 | |
kgills | 0:aa46c0e0e4a0 | 60 | // Enable light sensor to charge capacitor |
kgills | 0:aa46c0e0e4a0 | 61 | light_en = 0; |
kgills | 0:aa46c0e0e4a0 | 62 | |
kgills | 0:aa46c0e0e4a0 | 63 | // Get Pressure |
kgills | 0:aa46c0e0e4a0 | 64 | if(bmp180.getPressure(¤tPressure) != 0) { |
kgills | 0:aa46c0e0e4a0 | 65 | printf("Error getting pressure\n"); |
kgills | 0:aa46c0e0e4a0 | 66 | } else { |
kgills | 0:aa46c0e0e4a0 | 67 | printf("Press = %0.1f kPa\n", (float)(currentPressure/1000.0)); |
kgills | 0:aa46c0e0e4a0 | 68 | } |
kgills | 0:aa46c0e0e4a0 | 69 | |
kgills | 0:aa46c0e0e4a0 | 70 | // Get Humidity |
kgills | 0:aa46c0e0e4a0 | 71 | if(si7020.checkHumidity(¤tHumidity) != 0) { |
kgills | 0:aa46c0e0e4a0 | 72 | printf("Error getting humidity\n"); |
kgills | 0:aa46c0e0e4a0 | 73 | } else { |
kgills | 0:aa46c0e0e4a0 | 74 | printf("Humid = %0.1f %%\n", currentHumidity); |
kgills | 0:aa46c0e0e4a0 | 75 | } |
kgills | 0:aa46c0e0e4a0 | 76 | |
kgills | 0:aa46c0e0e4a0 | 77 | // Get temperature |
kgills | 0:aa46c0e0e4a0 | 78 | if(si7020.getPrevTemperature(¤tTemperature) != 0) { |
kgills | 0:aa46c0e0e4a0 | 79 | printf("Error getting temperature\n"); |
kgills | 0:aa46c0e0e4a0 | 80 | } else { |
kgills | 0:aa46c0e0e4a0 | 81 | printf("Temp = %0.1f C\n", currentTemperature); |
kgills | 0:aa46c0e0e4a0 | 82 | } |
kgills | 0:aa46c0e0e4a0 | 83 | |
kgills | 0:aa46c0e0e4a0 | 84 | // Get light |
kgills | 0:aa46c0e0e4a0 | 85 | currentLight = light_ain.read(); |
kgills | 0:aa46c0e0e4a0 | 86 | printf("Light = %0.1f %% \n", currentLight*100.0f); |
kgills | 0:aa46c0e0e4a0 | 87 | |
kgills | 0:aa46c0e0e4a0 | 88 | // Disable light sensor |
kgills | 0:aa46c0e0e4a0 | 89 | light_en = 1; |
kgills | 0:aa46c0e0e4a0 | 90 | |
kgills | 0:aa46c0e0e4a0 | 91 | printf("\n"); |
kgills | 0:aa46c0e0e4a0 | 92 | } |
kgills | 0:aa46c0e0e4a0 | 93 | } |