Diff: main.cpp

Revision:

8:a1538e8a3fd9

Parent:

7:6075af57668e

Child:

9:affd4e6372a0

diff -r 6075af57668e -r a1538e8a3fd9 main.cpp
--- a/main.cpp	Tue Sep 05 14:11:26 2017 +0000
+++ b/main.cpp	Tue Sep 26 16:45:15 2017 +0000
@@ -39,6 +39,7 @@
 MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
 
 bool op_sensor_config(MAX30101 &op_sensor);
+void pmic_config(I2C & i2c_bus, DigitalOut & pmic_en);
 
 /* Op Sensor FIFO nearly full callback */
 volatile bool op_sensorIntFlag = 0;                  
@@ -61,6 +62,9 @@
     
     I2C i2cBus(I2C1_SDA, I2C1_SCL);         // I2C bus, P3_4 = SDA, P3_5 = SCL 
 
+    DigitalOut VLED_EN(P3_3,0);                //Enable for VLEDs
+    pmic_config(i2cBus, VLED_EN);
+    
     MAX30101 op_sensor(i2cBus);             // Create new MAX30101 on i2cBus
     int rc = op_sensor_config(op_sensor);   // Config sensor, return 0 on success
     
@@ -176,3 +180,24 @@
     
     return rc;
 }
+
+void pmic_config(I2C & i2c_bus, DigitalOut & pmic_en)
+{
+    
+    const uint8_t PMIC_ADRS = 0x54;
+    const uint8_t BBB_EXTRA_ADRS = 0x1C;
+    const uint8_t BOOST_VOLTAGE = 0x05;
+    
+    char data_buff[] = {BBB_EXTRA_ADRS, 0x40};    //BBBExtra register address 
+                                                  //and data to enable passive 
+                                                  //pull down. 
+    i2c_bus.write(PMIC_ADRS, data_buff,2);        //write to BBBExtra register
+    
+    data_buff[0] = BOOST_VOLTAGE;
+    data_buff[1] = 0x14;                          //Boost voltage configuration 
+                                                  //register followed by data 
+                                                  //to set voltage to 4.5V 
+    pmic_en = 0;                                  //disables VLED 
+    i2c_bus.write(PMIC_ADRS, data_buff,2);        //write to BBBExtra register
+    pmic_en = 1;                                  //enables VLED                                               
+}
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