Manuel Caballero
Library for the BH1750 Digital 16-bit Serial Output Type Ambient Light Sensor IC.
Revision 1:8115dc8275eb, committed 2017-08-10
- Comitter:
- mcm
- Date:
- Thu Aug 10 16:28:23 2017 +0000
- Parent:
- 0:bea4477679ee
- Commit message:
- The BH1750 library has been completed and tested, it works as expected.
Changed in this revision
| BH1750.cpp | Show annotated file Show diff for this revision Revisions of this file |
| BH1750.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/BH1750.cpp Thu Aug 10 12:47:55 2017 +0000
+++ b/BH1750.cpp Thu Aug 10 16:28:23 2017 +0000
@@ -1,5 +1,5 @@
/**
- * @brief BH1750.h
+ * @brief BH1750.cpp
* @details Digital 16-bit Serial Output Type Ambient Light Sensor IC.
* Functions file.
*
@@ -18,11 +18,11 @@
-BH1750::BH1750 ( PinName sda, PinName scl, uint32_t addr, uint32_t hz )
+BH1750::BH1750 ( PinName sda, PinName scl, uint32_t addr, uint32_t freq )
: i2c ( sda, scl )
, BH1750_Addr ( addr )
{
- i2c.frequency(hz);
+ i2c.frequency( freq );
}
@@ -134,7 +134,7 @@
* @brief uint32_t BH1750_TriggerMeasurement ( uint32_t )
* @details Trigger a new temperature measurement.
*
- * @param[in] MODE: ONE-SHOT or CONTINUOUSLY measurement ( Normal Mode or Mode2 ).
+ * @param[in] mode: ONE-SHOT or CONTINUOUSLY measurement ( Normal Mode or Mode2 ).
*
* @param[out] Status of BH1750_TriggerMeasurement.
*
@@ -148,12 +148,12 @@
* @warning The measuring time depends on the chosen resolution ( MODE ). The user
* must take this into account.
*/
-uint32_t BH1750::BH1750_TriggerMeasurement ( uint32_t MODE )
+uint32_t BH1750::BH1750_TriggerMeasurement ( BH1750_COMMANDS mode )
{
- char cmd[] = { MODE };
+ char cmd[] = { mode };
uint32_t aux = 0;
- BH1750_Mode = MODE;
+ BH1750_Mode = mode;
aux = i2c.write ( BH1750_Addr, &cmd[0], 1 );
--- a/BH1750.h Thu Aug 10 12:47:55 2017 +0000
+++ b/BH1750.h Thu Aug 10 16:28:23 2017 +0000
@@ -1,81 +1,151 @@
+/**
+ * @brief BH1750.h
+ * @details Digital 16-bit Serial Output Type Ambient Light Sensor IC.
+ * Header file.
+ *
+ *
+ * @return NA
+ *
+ * @author Manuel Caballero
+ * @date 10/August/2017
+ * @version 10/August/2017 The ORIGIN
+ * @pre NaN
+ * @warning NaN
+ * @pre This code belongs to AqueronteBlog ( http://unbarquero.blogspot.com ).
+ */
#ifndef BH1750_H
#define BH1750_H
-
+
#include "mbed.h"
-
-//!Library for the BH1750 Digital 16-bit Serial Output Type Ambient Light Sensor IC.
-
-/**
- * @brief DEFAULT ADDRESS
- */
-#define BH1750_ADDR_L 0x23
-#define BH1750_ADDR_H 0x5C
-
-/**
- * @brief COMMAND REGISTERS
- */
-#define BH1750_POWER_DOWN 0x00 /*!< No active state */
-#define BH1750_POWER_ON 0x01 /*!< Waiting for measurement command */
-#define BH1750_RESET 0x07 /*!< Reset Data register value. Reset command is not acceptable in Power Down mode */
-#define BH1750_CONTINUOUSLY_H_RESOLUTION_MODE 0x10 /*!< Start measurement at 1lx resolution. Measurement Time is typically 120ms */
-#define BH1750_CONTINUOUSLY_H_RESOLUTION_MODE2 0x11 /*!< Start measurement at 0.5lx resolution. Measurement Time is typically 120ms */
-#define BH1750_CONTINUOUSLY_L_RESOLUTION_MODE 0x13 /*!< Start measurement at 4lx resolution. Measurement Time is typically 16ms */
-#define BH1750_ONE_TIME_H_RESOLUTION_MODE 0x20 /*!< Start measurement at 1lx resolution. Measurement Time is typically 120ms. It is automatically set to Power Down mode after measurement */
-#define BH1750_ONE_TIME_H_RESOLUTION_MODE2 0x21 /*!< Start measurement at 0.5lx resolution. Measurement Time is typically 120ms. It is automatically set to Power Down mode after measurement */
-#define BH1750_ONE_TIME_L_RESOLUTION_MODE 0x23 /*!< Start measurement at 4lx resolution. Measurement Time is typically 16ms. It is automatically set to Power Down mode after measurement */
/**
- * @brief SENSITIVITY
- */
-#define BH1750_SENSITIVITY_DEFAULT 0x45 /*!< Measurement Time Register by default. This is for registration of measurement time */
+ Example:
+
+ #include "mbed.h"
+ #include "BH1750.h"
+
+ BH1750 myLightSensor ( I2C_SDA, I2C_SCL, BH1750::BH1750_ADDR_L, 400000 ); //[todo]
+ Serial pc ( USBTX, USBRX ); // tx, rx
+
+ Ticker serial;
+
+ DigitalOut myled(LED1);
-/**
- * @brief INTERNAL CONSTANTS
- */
-#define BH1750_SUCCESS 0x00
-#define BH1750_FAILURE 0x01
-#define I2C_SUCCESS 0x00
+ void sendDATA ( void )
+ {
+ float myLux = 0;
+
+ myled = 0;
+
+ myLightSensor.BH1750_TriggerMeasurement ( BH1750::BH1750_ONE_TIME_H_RESOLUTION_MODE );
+ wait ( 1 );
+ myLightSensor.BH1750_ReadLux ( &myLux );
+
+ pc.printf( "Lux: %0.1f\r\n", myLux );
+
+ myled = 1;
+
+ }
+ int main() {
+ pc.baud ( 115200 );
+ serial.attach( &sendDATA, 3 ); // the address of the function to be attached ( sendDATA ) and the interval ( 3s )
+
+ // Let the callbacks take care of everything
+ while(1) sleep();
+ }
+*/
/*!
-[todo]
+ Library for the BH1750 Digital 16-bit Serial Output Type Ambient Light Sensor IC.
*/
class BH1750
{
public:
- //!Creates an instance of the class.
- /*!
- [todo]
- */
- BH1750 ( PinName sda, PinName scl, uint32_t addr, uint32_t hz );
-
- /*!
- Destroys instance.
- */
- ~BH1750();
-
- //![todo]
- /*!
- [todo]
- */
+ /** Represents the different I2C address possibilities for the BH1750
+ */
+ enum BH1750_ADDRESS {
+ BH1750_ADDR_L = ( 0x23 << 1 ), /**< Addr pin = GND */
+ BH1750_ADDR_H = ( 0x5C << 1 ) /**< Addr pin = VDD */
+ };
+
+ enum BH1750_COMMANDS {
+ BH1750_POWER_DOWN = 0x00, /*!< No active state */
+ BH1750_POWER_ON = 0x01, /*!< Waiting for measurement command */
+ BH1750_RESET = 0x07, /*!< Reset Data register value. Reset command is not acceptable in Power Down mode */
+ BH1750_CONTINUOUSLY_H_RESOLUTION_MODE = 0x10, /*!< Start measurement at 1lx resolution. Measurement Time is typically 120ms */
+ BH1750_CONTINUOUSLY_H_RESOLUTION_MODE2 = 0x11, /*!< Start measurement at 0.5lx resolution. Measurement Time is typically 120ms */
+ BH1750_CONTINUOUSLY_L_RESOLUTION_MODE = 0x13, /*!< Start measurement at 4lx resolution. Measurement Time is typically 16ms */
+ BH1750_ONE_TIME_H_RESOLUTION_MODE = 0x20, /*!< Start measurement at 1lx resolution. Measurement Time is typically 120ms. It is automatically set to Power Down mode after measurement */
+ BH1750_ONE_TIME_H_RESOLUTION_MODE2 = 0x21, /*!< Start measurement at 0.5lx resolution. Measurement Time is typically 120ms. It is automatically set to Power Down mode after measurement */
+ BH1750_ONE_TIME_L_RESOLUTION_MODE = 0x23 /*!< Start measurement at 4lx resolution. Measurement Time is typically 16ms. It is automatically set to Power Down mode after measurement */
+ };
+
+ enum BH1750_SENSITIVITY {
+ BH1750_SENSITIVITY_DEFAULT = 0x45 /*!< Measurement Time Register by default. This is for registration of measurement time */
+ };
+
+
+ enum BH1750_CONSTANT {
+ BH1750_SUCCESS = 0x00, /*!< The communication was fine */
+ BH1750_FAILURE = 0x01, /*!< Something went wrong */
+ I2C_SUCCESS = 0x00 /*!< I2C communication was fine */
+ };
+
+
+ /** Create an BH1750 object connected to the specified I2C pins.
+ *
+ * @param sda I2C data pin
+ * @param scl I2C clock pin
+ * @param addr I2C slave address
+ * @param freq I2C frequency in Hz.
+ */
+ BH1750 ( PinName sda, PinName scl, uint32_t addr, uint32_t freq );
-
- uint32_t BH1750_PowerDown ();
- uint32_t BH1750_PowerOn ();
- uint32_t BH1750_ResetDataRegister ();
- uint32_t BH1750_TriggerMeasurement ( uint32_t MODE );
- uint32_t BH1750_NewSensitivity ( uint8_t newSensitivity );
- uint32_t BH1750_ReadRawData ( char* myRawData );
- uint32_t BH1750_ReadLux ( float* myLux );
-
-
+ /** Delete BH1750 object.
+ */
+ ~BH1750();
+
+
+ /** It put the BH1750 sensor in the lowest power mode.
+ */
+ uint32_t BH1750_PowerDown ( void );
+
+ /** It turns on the BH1750 sensor.
+ */
+ uint32_t BH1750_PowerOn ( void );
+
+ /** It clears the Data register.
+ */
+ uint32_t BH1750_ResetDataRegister ( void );
+
+ /** Create an BH1750 object connected to the specified I2C pins.
+ * @param mode One-shot/Continuous mode in High, High2 or Low resolution.
+ */
+ uint32_t BH1750_TriggerMeasurement ( BH1750_COMMANDS mode );
+
+ /** It configures a new sensitivity.
+ */
+ uint32_t BH1750_NewSensitivity ( uint8_t newSensitivity );
+
+ /** It reads the raw data from the BH1750 sensor.
+ * @param myRawData 2-Byte array.
+ */
+ uint32_t BH1750_ReadRawData ( char* myRawData );
+
+ /** It reads a converted data from the BH1750 sensor.
+ * @param myLux Light value.
+ */
+ uint32_t BH1750_ReadLux ( float* myLux );
+
+
private:
- I2C i2c;
- uint32_t BH1750_Addr;
- uint32_t BH1750_Mode;
+ I2C i2c;
+ uint32_t BH1750_Addr;
+ uint32_t BH1750_Mode;
};
-
+
#endif