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sshahryiar
Joined: 05 May 2010
Posts: 94
Location: Dhaka, Bangladesh
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| BH1750 Digital Light Sensor / Lux Meter Chip Driver |
 Posted: Tue Apr 30, 2013 9:02 pm |
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BH1750.h
| Code: | #use I2C (Master, SDA = PIN_A0, SCL = PIN_A1)
#define BH1750_address_w 0x46
#define BH1750_address_r 0x47
#define power_down 0x00
#define power_up 0x01
#define reset 0x07
#define cont_H_res_mode1 0x10
#define cont_H_res_mode2 0x11
#define cont_L_res_mode 0x13
#define one_time_H_res_mode1 0x20
#define one_time_H_res_mode2 0x21
#define one_time_L_res_mode 0x23
void BH1750_init();
void BH1750_write(unsigned char cmd);
unsigned long BH1750_read_word();
unsigned long get_lux_value(unsigned char mode, unsigned long delay_time); |
BH1750.c
| Code: | #include "BH1750.h"
void BH1750_init()
{
delay_ms(100);
BH1750_write(power_down);
}
void BH1750_write(unsigned char cmd)
{
I2C_start();
I2C_write(BH1750_address_w);
I2C_write(cmd);
I2C_stop();
}
unsigned long BH1750_read_word()
{
register unsigned long value = 0;
unsigned char lb = 0;
unsigned char hb = 0;
I2C_start();
I2C_write(BH1750_address_r);
hb = I2C_read(1);
lb = I2C_read(0);
I2C_stop();
value = make16(hb, lb);
return value;
}
unsigned long get_lux_value(unsigned char mode, unsigned long delay_time)
{
register unsigned long lux_value = 0;
BH1750_write(power_up);
BH1750_write(mode);
lux_value = BH1750_read_word();
delay_ms(delay_time);
BH1750_write(power_down);
return lux_value;
} |
_________________
https://www.facebook.com/MicroArena
SShahryiar |
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mstbzr
Joined: 02 Jan 2015
Posts: 1
Location: türkiye
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| Posted: Fri Jan 02, 2015 3:05 am |
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Rica etsem örnek bir kod yazmanız mümkün mü?
Is it possible to write a sample code please? |
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scanan
Joined: 13 Aug 2004
Posts: 58
Location: Turkey
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| Posted: Tue May 26, 2015 8:00 am |
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| mstbzr wrote: | Rica etsem örnek bir kod yazmanız mümkün mü?
Is it possible to write a sample code please? |
Here is an application that I did with PIC18F6310 and works quite well
luxmeter.h
| Code: |
#include <18F6310.h>
#device *=16
#FUSES NOWDT //No Watch Dog Timer
#FUSES INTRC_IO //High speed osc with HW enabled 4X PLL
#FUSES NOBROWNOUT
#FUSES PUT //No Power Up Timer
#FUSES NOSTVREN //Stack full/underflow will cause reset
#FUSES NODEBUG //No Debug mode for ICD
#FUSES NOFCMEN //Fail-safe clock monitor enabled
#FUSES NOXINST //Extended set extension and Indexed Addressing mode disabled (Legacy mode)
#FUSES NOPROTECT //Code not protected from reading
#FUSES NOLPT1OSC
#FUSES NOMCLR
#use delay(clock=16000000)
#use rs232(baud=57600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,FORCE_SW)
#use I2C (Master, SDA = PIN_F3, SCL = PIN_F2,FORCE_SW)
struct IOpins {
BOOLEAN unused00; //A0
BOOLEAN unused01; //A1
BOOLEAN unused02; //A2
BOOLEAN Aled2; //A3
BOOLEAN Aled1; //A4
BOOLEAN unused03; //A5
BOOLEAN unused04; //A6
BOOLEAN unused05; //A7
BOOLEAN unused06; //B0
BOOLEAN unused07; //B1
BOOLEAN unused08; //B2
BOOLEAN unused09; //B3
BOOLEAN unused10; //B4
BOOLEAN unused11; //B5
BOOLEAN comLED; //B6
BOOLEAN unused12; //B7
BOOLEAN cpuLED; //C0
BOOLEAN unused13; //C1
BOOLEAN unused14; //C2
BOOLEAN unused15; //C3
BOOLEAN unused16; //C4
BOOLEAN unused17; //C5
BOOLEAN rs232Tx; //C6
BOOLEAN rs232Rx; //C7
BOOLEAN unused18; //D0
BOOLEAN unused19; //D1
BOOLEAN unused20; //D2
BOOLEAN unused21; //D3
BOOLEAN unused22; //D4
BOOLEAN unused23; //D5
BOOLEAN unused24; //D6
BOOLEAN unused25; //D7
BOOLEAN unused26; //E0
BOOLEAN unused27; //E1
BOOLEAN unused28; //E2
BOOLEAN unused29; //E3
BOOLEAN unused30; //E4
BOOLEAN errorLED; //E5
BOOLEAN unused31; //E6
BOOLEAN unused32; //E7
BOOLEAN addr; //F0
BOOLEAN unused33; //F1
BOOLEAN SCL; //F2
BOOLEAN SDA; //F3
BOOLEAN unused34; //F4
BOOLEAN unused35; //F5
BOOLEAN unused36; //F6
BOOLEAN unused37; //F7
BOOLEAN emergencyLED; //G0
BOOLEAN unused38; //G1
BOOLEAN unused39; //G2
BOOLEAN unused40; //G3
BOOLEAN unused41; //G4
//BOOLEAN unused42; //G5
//BOOLEAN unused43; //G6
//BOOLEAN unused44; //G7
} IOpin;
#byte IOpin=0xF80
#define BH1750_address_w 0x46
#define BH1750_address_r 0x47
#define power_down 0x00
#define power_up 0x01
#define reset 0x07
#define cont_H_res_mode1 0x10
#define cont_H_res_mode2 0x11
#define cont_L_res_mode 0x13
#define one_time_H_res_mode1 0x20
#define one_time_H_res_mode2 0x21
#define one_time_L_res_mode 0x23
unsigned int16 lightintensity=0;
void BH1750_init();
void BH1750_write(unsigned char cmd);
unsigned long BH1750_read_word();
unsigned long get_lux_value(unsigned char mode, unsigned long delay_time);
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luxmeter.c
| Code: |
#include "luxmeter.h"
void BH1750_init()
{
delay_ms(100);
BH1750_write(power_down);
}
void BH1750_write(unsigned char cmd)
{
I2C_start();
I2C_write(BH1750_address_w);
I2C_write(cmd);
I2C_stop();
}
unsigned long BH1750_read_word()
{
register unsigned long value = 0;
unsigned char lb = 0;
unsigned char hb = 0;
I2C_start();
I2C_write(BH1750_address_r);
hb = I2C_read(1);
lb = I2C_read(0);
I2C_stop();
value = make16(hb, lb);
return value;
}
unsigned long get_lux_value(unsigned char mode, unsigned long delay_time)
{
register unsigned long lux_value = 0;
BH1750_write(power_up);
BH1750_write(mode);
lux_value = BH1750_read_word();
delay_ms(delay_time);
BH1750_write(power_down);
return lux_value;
}
void main()
{
set_tris_a(0x00);
set_tris_b(0x24);
set_tris_c(0x80);
set_tris_d(0x00);
set_tris_e(0x15);
set_tris_f(0x58);
set_tris_g(0x10);
setup_wdt(WDT_OFF);
setup_adc(ADC_OFF);
setup_adc_ports(NO_ANALOGS);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_4);
setup_timer_1(T1_INTERNAL|T1_DIV_BY_1);
setup_timer_2(T2_DISABLED, 0xFF, 0x10);
setup_timer_3(T3_DISABLED);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);
setup_oscillator(OSC_16MHZ);
clear_interrupt(int_ext1);
clear_interrupt(int_ext2);
IOpin.cpuLED=0;
IOpin.errorLED=0;
IOpin.comLED=0;
IOpin.emergencyLED=0;
// set BH1750 address to 0x23 when low
// set BH1750 address to 0x5C when high
IOpin.addr=0;
EXT_INT_EDGE(1,L_TO_H);
enable_interrupts(INT_EXT1);
enable_interrupts(INT_EXT2);
disable_interrupts(INT_LOWVOLT);
disable_interrupts(INT_TIMER0);
disable_interrupts(INT_TIMER1);
disable_interrupts(GLOBAL);
BH1750_init();
IOpin.addr=0;
for(;;)
{
lightintensity=get_lux_value(cont_H_res_mode1,1000);
printf("lux value:%f \n\r",(float)lightintensity/1.2);
IOpin.cpuLED=1;
delay_ms(10);
IOpin.cpuLED=0;
}
}
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_________________
Dr Suleyman CANAN
R&D Electronic Engineer
https://suleymancanan.wordpress.com
Do whatever you do with amateur spirit -
But always feel professional. |
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sshahryiar
Joined: 05 May 2010
Posts: 94
Location: Dhaka, Bangladesh
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| Posted: Fri Jul 07, 2017 8:37 pm |
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Example Code
| Code: |
#include <16F87.h>
#device *= 16
#fuses INTRC_IO, PROTECT, NOWDT, BROWNOUT, NOWRT
#fuses NODEBUG, NOIESO, PUT, NOMCLR, FCMEN, CPD
#use delay (internal = 4MHz)
#include <lcd420.c>
#include "BH1750.c"
void setup();
void main()
{
unsigned long lux = 0;
setup();
while(TRUE)
{
lux = get_lux_value(cont_H_res_mode1, 180);
lcd_gotoxy(6, 2);
printf(lcd_putc, "%05lu ", lux);
delay_ms(100);
};
}
void setup()
{
disable_interrupts(global);
setup_oscillator(OSC_4MHz);
setup_WDT(WDT_OFF);
setup_comparator(NC_NC_NC_NC);
setup_SPI(SPI_disabled | SPI_SS_disabled);
setup_timer_0(0 | 0 | 0);
setup_timer_1(T1_disabled);
setup_timer_2(T2_disabled, 255, 1);
setup_CCP1(CCP_off);
set_timer0(0);
set_timer1(0);
set_timer2(0);
BH1750_init();
lcd_init();
lcd_putc("\f");
lcd_gotoxy(1, 1);
lcd_putc("Ambient Light/lx");
}
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_________________
https://www.facebook.com/MicroArena
SShahryiar |
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