Diff: ak7451ctrl.cpp

Revision:

25:76c11ab5060e

Parent:

16:d85be9bafb80

Child:

34:1ea3357c8d9a

--- a/ak7451ctrl.cpp	Thu Apr 13 22:50:02 2017 +0000
+++ b/ak7451ctrl.cpp	Fri Apr 14 20:13:38 2017 +0000
@@ -24,25 +24,31 @@
     subId = subid;
     
     if(subId == SUB_ID_AK7451){
-        SPI* mSpi;
-        DigitalOut* mCs;
+        SPI* mSpi;          // SPI connection
+        DigitalOut* mCs;    // Chip select pin
+        
+        // Initialize SPI connection
         AK7451::Status status = AK7451::ERROR;        
         mSpi = new SPI(SPI_MOSI, SPI_MISO, SPI_SCK);
         mSpi->format(8,1);    // 8bit, Mode=1
         mSpi->frequency(1000000);
+        
+        // Initialize chip select pin
         mCs = new DigitalOut(SPI_CS);
         ak7451 = new AK7451();
         ak7451->begin(mSpi, mCs);
         sensorName = "AK7451";
 
+        // Set to User Mode
         status = ak7451->setOperationMode(AK7451::AK7451_USER_MODE);
         if( status != AK7451::SUCCESS ){
             MSG("#AK7451 user mode failed.\r\n"); 
             return AkmSensor::ERROR;
         }
         MSG("#AK7451 user mode succeed.\r\n"); 
-                
-        char data[2] = {0x02,0x00};                 // set clockwise rotation
+
+        // Set clockwise rotation                
+        char data[2] = {0x02,0x00};                 
         status = ak7451->writeEEPROM(0x07,data);    // set clockwise
         if( status != AK7451::SUCCESS ){
             MSG("#AK7451 write EEPROM failed.\r\n"); 
@@ -50,6 +56,7 @@
         }
         MSG("#AK7451 write EEPROM succeed.\r\n"); 
         
+        // Set to Normal Mode
         status = ak7451->setOperationMode(AK7451::AK7451_NORMAL_MODE);
         if( status != AK7451::SUCCESS ){
             MSG("#AK7451 normal mode failed.\r\n");