Diff: ad7172.cpp

Revision:

8:8466106f2e1b

Parent:

7:ba79fe65707d

Child:

9:e71f2bdd2f83

--- a/ad7172.cpp	Fri Jun 19 14:04:13 2020 +0000
+++ b/ad7172.cpp	Tue Jun 30 19:17:29 2020 +0000
@@ -64,12 +64,12 @@
 //@AD7172 class constructor.
 //@param spi - The handler of the instance of the driver.
 //@param slave_select - The Slave Chip Select Id to be passed to the SPI calls.
-AD7172::AD7172(SPI& p_spi,PinName slave_select,DigitalIn& p_rdy) 
+AD7172::AD7172(SPI& p_spi,PinName slave_select,DigitalIn& p_rdy)
 	: _spi(p_spi), _rdy(p_rdy)
 {
 	_spi.format(8,3); //8 bits ; POL=1 ; PHASE=1
 	_spi.frequency(10000000); //10 MHz SPI clock rate
-	continuous_on = 0;
+	continuous_on = 0; //Continuous read mode flag
 	cs = new DigitalOut(slave_select); //Define cs as digital out variable referred to slave_select pin
 
 	Reset(); //Calling the AD7172-2 restart function
@@ -123,9 +123,9 @@
 void AD7172::ReadID()
 {
 	*cs=0;
-	_spi.write(0x40|AD7172_ID_REG);
-	id.bytes[1] = _spi.write(0x00);
-	id.bytes[0] = _spi.write(0x00);
+	_spi.write(0x40|AD7172_ID_REG); //Configures the communication register to read the ID address
+	id.bytes[1] = _spi.write(0x00); //Read the two most significant bytes 
+	id.bytes[0] = _spi.write(0x00); //Read the two lesat significant bytes 
 	*cs=1;
 }