main.cpp

00001 #include "mbed.h"
00002 #include "BQ25896.h"
00003 
00004 Serial pc(p29, p30, "debug", 115200);
00005 
00006 BQ25896 bq25896(p28, p2);
00007 
00008 uint8_t chargeState = 0;
00009 
00010 void initBQ25896(void){
00011     pc.printf("init BQ25896\n\r");
00012     bq25896.reset();
00013     bq25896.disableWATCHDOG(); // disable Watchdog
00014     bq25896.disableILIMPin();
00015     bq25896.setIINLIM(3250); // mA
00016     bq25896.setBOOSTV(4900);//5000);//
00017     bq25896.setICHG(1280);   // Fast Charge Current Limit 1280
00018     bq25896.setBOOST_LIM(6); // BOOST_LIM 2.15A
00019     wait(1);
00020     bq25896.oneShotADC();
00021     if(bq25896.getVBUSV() < 4.00){
00022         bq25896.enableOTG();
00023     }
00024 }
00025 
00026 void checkChargingState(void){
00027     
00028     bq25896.oneShotADC();
00029     float voltage = bq25896.getVBUSV();
00030     if(chargeState == 0){
00031         if (voltage >= 4.95){
00032             pc.printf("charger detected  %2.3f\n\r", voltage);
00033             chargeState = 1;
00034             bq25896.disableOTG();
00035         }
00036     } else if (chargeState == 1){
00037         if (voltage < 4.00){
00038             pc.printf("charger removed %2.3f\n\r", voltage);
00039             chargeState = 0;
00040             bq25896.enableOTG();
00041         }
00042     }
00043 }
00044 
00045 int main()
00046 {
00047     initBQ25896();
00048     while(true){
00049         wait(1);
00050         checkChargingState();
00051     }
00052 }