Can a ADC read more than one channel?
The only thing to keep in mind when programming the ADC to read multiple channels is that only one channel can be used in the conversion at a time. If we had two sensors, and we are using channel (pin) 3 and 4 to read each sensor, we would first need to set the channel for 3 and then start a conversion.
How is ADC initialized in a microcontroller?
The ADC is initialized as we did with the accelerometer readings and in this case, we are connecting the X axis of the accelerometer to channel 0 and the Y axis to channel 1. There is not preinitialization of the ADC channel before we enable the ADC because we are starting with channel 0 which is the default channel.
How are ADC results displayed on the LCD?
These processes of getting the ADC results for each channel can be done in a loop and displayed on the LCD. The ADC is initialized as we did with the accelerometer readings and in this case, we are connecting the X axis of the accelerometer to channel 0 and the Y axis to channel 1.
Can a microcontroller read more than one analog voltage source?
If you have more than one analog voltage source, more than one sensor, for instance, you can read all of them as long as the number of sources is fewer than the number of ADC pins you have on your microcontroller. With the Atmega32, there are 8 ADC pins.
What is the purpose of a differential ADC?
A differential ADC measures the voltage difference between two inputs. This can be essential in certain applications as some measurement concepts require two output signals instead of one to quantify the physical property of interest.
Is there preinitialization of the ADC channel?
There is not preinitialization of the ADC channel before we enable the ADC because we are starting with channel 0 which is the default channel. In the interrupt service routine (the routine starting with ISR), you will see a few new statements, such as switch and case.