AS7000.cpp

00001 #include "AS7000.h"
00002 #include "mbed.h"
00003 
00004 DigitalOut AS7000_GPIO8(p5); //NNN50-P5 map to GPIO-8 for AS7000 on/off
00005 DigitalInOut AS7000_INT(p4); //NNN50-P4 GPIO-5 for AS7000 INT
00006 
00007 
00008 AS7000::AS7000(PinName SDA, PinName SCL) : _i2c(SDA,SCL){
00009     //Set I2C fast and bring reset line high
00010     _i2c.frequency(400000);
00011     address = AS7000Address;
00012     
00013     AS7000_INT.mode(PullNone);
00014     
00015     AS7000_INT.output();
00016      
00017     AS7000_GPIO8.write(1); // Power OFF AS7000
00018     AS7000_INT.write(1); // AS7000 GPIO OUTPUT LOW
00019     AS7000_INT.input();
00020     wait_ms(100);
00021 }
00022     
00023 void AS7000::enable(void){
00024         char cmd[2];
00025         
00026         AS7000_GPIO8.write(0); //Power ON AS7000
00027         wait_ms(280);    //Wait for > 250ms for booting
00028           
00029         cmd[0] = AS7000_STARTUP; //0x04;       
00030         cmd[1] = 0x02;
00031         _i2c.write(address, cmd, 2);
00032          wait_ms(35);  
00033     
00034 }
00035 
00036 void AS7000::update(void){
00037     hrm.transaction_id = rawdata[0];
00038     hrm.status         = rawdata[1];
00039     hrm.hreat_rate     = rawdata[2];
00040     hrm.signal_QA      = rawdata[3];
00041     hrm.LED_current    = ((rawdata[4]<<8)+rawdata[5]);
00042     hrm.SYNC           = rawdata[6];    
00043 }
00044 
00045 void AS7000::hr_only(void){
00046     char cmd[2];
00047      cmd[0] = HR_ONLY;
00048      if(AS7000_INT == 0) {
00049         _i2c.write(address, cmd, 1);
00050         _i2c.read(address, rawdata, 7, false);
00051         wait_ms(10);
00052         update();
00053     }      
00054 }