74 lines
1.5 KiB
C++
74 lines
1.5 KiB
C++
#include "Kernel\Sys.h"
|
||
|
||
#include "Device\I2C.h"
|
||
|
||
#include "BH1750.h"
|
||
|
||
#define CMD_PWN_OFF 0x00
|
||
#define CMD_PWN_ON 0x01
|
||
#define CMD_RESET 0x07
|
||
|
||
// 连续分辨率。数值连续变化
|
||
#define CMD_HRES 0x10 // 高解析度 1 测量时间120ms
|
||
#define CMD_HRES2 0x11 // 高解析度 0.5 测量时间120ms
|
||
//#define CMD_MRES 0x13
|
||
#define CMD_LRES 0x13 // 高解析度 4 测量时间16ms
|
||
|
||
// 一次分辨率。只能读取一次，数值不会变化
|
||
#define CMD_ORES 0x20 // 高解析度 1 测量时间120ms
|
||
|
||
BH1750::BH1750()
|
||
{
|
||
IIC = nullptr;
|
||
|
||
// 7位地址，到了I2C那里，需要左移1位
|
||
Address = 0x5C;
|
||
//Address = 0x23;
|
||
}
|
||
|
||
BH1750::~BH1750()
|
||
{
|
||
delete IIC;
|
||
IIC = nullptr;
|
||
}
|
||
|
||
void BH1750::Init()
|
||
{
|
||
debug_printf("\r\nBH1750::Init Addr=0x%02X \r\n", Address);
|
||
|
||
IIC->Address = Address << 1;
|
||
|
||
Write(CMD_PWN_ON); // 打开电源
|
||
Write(CMD_RESET); // 软重启
|
||
//Write(0x42);
|
||
//Write(0x65); // 设置透光率为100%
|
||
Write(CMD_HRES); // 设置为高精度模式
|
||
//Write(CMD_ORES); // 设置为高精度模式
|
||
}
|
||
|
||
ushort BH1750::Read()
|
||
{
|
||
if(!IIC) return 0;
|
||
|
||
ByteArray bs(2);
|
||
if(IIC->Read(0, bs) == 0) return 0;
|
||
|
||
ushort n = (bs[0] << 8) | bs[1];
|
||
|
||
return n;
|
||
}
|
||
|
||
void BH1750::Write(byte cmd)
|
||
{
|
||
if(!IIC) return;
|
||
|
||
if(!IIC->Write(0, cmd)) debug_printf("BH1750::Write 0x%02X 失败\r\n", cmd);
|
||
//Sys.Sleep(5);
|
||
}
|
||
|
||
void BH1750::ChangePower(int level)
|
||
{
|
||
// 进入低功耗时，直接关闭
|
||
if(level) Write(CMD_PWN_OFF);
|
||
}
|