Revision 3:193555f31269, committed 2019-06-19

Comitter:

vraktion

Date:

Wed Jun 19 14:23:44 2019 +0200

Parent:

2:874ba79e51f1

Commit message:

added charge detection feature with OTG switch

Changed in this revision

Binary file .DS_Store has changed

--- a/main.cpp	Wed Jun 19 12:15:55 2019 +0200
+++ b/main.cpp	Wed Jun 19 14:23:44 2019 +0200
@@ -1,25 +1,52 @@
 #include "mbed.h"
 #include "BQ25896.h"
 
-Serial pc(p13, p12, "debug", 115200);
+Serial pc(p29, p30, "debug", 115200);
+
+BQ25896 bq25896(p28, p2);
+
+uint8_t chargeState = 0;
 
-BQ25896 bq25896(p26, p27);
+void initBQ25896(void){
+    pc.printf("init BQ25896\n\r");
+    bq25896.reset();
+    bq25896.disableWATCHDOG(); // disable Watchdog
+    bq25896.disableILIMPin();
+    bq25896.setIINLIM(3250); // mA
+    bq25896.setBOOSTV(4900);//5000);//
+    bq25896.setICHG(1280);   // Fast Charge Current Limit 1280
+    bq25896.setBOOST_LIM(6); // BOOST_LIM 2.15A
+    wait(1);
+    bq25896.oneShotADC();
+    if(bq25896.getVBUSV() < 4.00){
+        bq25896.enableOTG();
+    }
+}
+
+void checkChargingState(void){
+    
+    bq25896.oneShotADC();
+    float voltage = bq25896.getVBUSV();
+    if(chargeState == 0){
+        if (voltage >= 4.95){
+            pc.printf("charger detected  %2.3f\n\r", voltage);
+            chargeState = 1;
+            bq25896.disableOTG();
+        }
+    } else if (chargeState == 1){
+        if (voltage < 4.00){
+            pc.printf("charger removed %2.3f\n\r", voltage);
+            chargeState = 0;
+            bq25896.enableOTG();
+        }
+    }
+}
 
 int main()
 {
-  pc.printf("init BQ25896\n\r");
-  bq25896.reset();
-  bq25896.disableWATCHDOG(); // disable Watchdog
-  bq25896.disableILIMPin();
-  bq25896.setIINLIM(3250); // mA
-  bq25896.enableOTG();
-  bq25896.setBOOSTV(5000); //
-  bq25896.setICHG(1280);   // Fast Charge Current Limit 1280
-  bq25896.setBOOST_LIM(6); // BOOST_LIM 2.15A
-  // bq25896.enableFORCE_VINDPM();//absolute VINDPM
-  // bq25896.setVINDPM(4000);
-  // pc->printf("VINDPM: %d\n\r", bq25896.getVINDPM());
+    initBQ25896();
     while(true){
         wait(1);
+        checkChargingState();
     }
 }
\ No newline at end of file