How do you program ADC in PIC16F877A?
How do you program ADC in PIC16F877A?
STEPS TO PERFORM ADC CONVERSION IN PIC16F877A Start the conversion by setting ADON/GO bit. Wait for A/D conversion to complete. As long as the GO_DONE bit HIGH, the conversion is not complete. GO=1; // Start ADC conversion while(GO_DONE==1); return((ADRESH<<8) + ADRESL);
What are the 7 steps to be followed when setting up the PIC16F877A ADC?
To read an ADC value the following steps has to be followed.
- Initialize the ADC Module.
- Select the analog channel.
- Start ADC by making Go/Done bit high.
- Wait for the Go/DONE bit to get low.
- Get the ADC result from ADRESH and ADRESL register.
How does ADC work in PIC microcontroller?
ADC of PIC Microcontrollers have 5 inputs for 28 pin devices and 8 inputs for 40/44 pin devices. It is a 10-bit ADC, ie the conversion of analog signal results in corresponding 10-bit digital number.
What are the pins supported for ADC in PIC16F877A?
The port pins can be configured as analog inputs (RA3 can also be the voltage reference) or as digital I/O. 1 = Right justified….PIC16F877A ADC Pins.
| ADC Channel | Pin |
|---|---|
| Channel 0 | RA0/AN0 (Port A) |
| Channel 1 | RA1/AN1 (Port A) |
| Channel 2 | RA2/AN2/VRef- (Port A) |
| Channel 3 | RA3/AN3/VRef+ (Port A) |
Does 16f877a has a built in ADC?
PIC16F877A ADC pins PIC16F877A has an inbuilt 10 bit Successive Approximation ADC which is multiplexed among 8 input pins. The below table shows the ADC input pins multiplexed with other GPIO pins. The ADC pin can be enabled by configuring the corresponding ACON1 register.
How do you program ADC?
Steps for Configuring ADC
- Configure the GPIO pin for ADC function using PINSEL register.
- Enable the CLock to ADC module.
- Deselect all the channels and Power on the internal ADC module by setting ADCR.
- Select the Particular channel for A/D conversion by setting the corresponding bits in ADCR.SEL.
- Set the ADCR.
Which ports are used for configuring ADC of PIC?
GPIO Registers
| PORT | Direction Register | Alternative Function |
|---|---|---|
| PORTA | TRISA | ADC |
| PORTB | TRISB | Interrupts |
| PORTC | TRISC | UART,I2C,PWM |
| PORTD | TRISD | Parallel Slave Port |
How do you set up ADC?
To get the ADC to work, we need to do the following tasks:
- Configure I/O pins as analog input(s) and configure ADC reference.
- Configure ADC registers to choose an analog pin.
- Configure ADC registers to enable the ADC.
- Configure ADC registers to set the acquisition time.
How many ADCs are there in PIC microcontroller?
The issue with the PIC16 and PIC18 devices is that they are 8-bit devices, which means that all of their registers are 8-bits wide. Therefore, the ADC has two ADC result registers, with the first register holding the first 2 bits of the result and the second register holding the last 8 bits of the result.
Which type of ADC is used in microcontroller?
An analog-to-digital converter (ADC) is used to convert an analog signal such as voltage to a digital form so that it can be read and processed by a microcontroller. Most microcontrollers nowadays have built-in ADC converters. It is also possible to connect an external ADC converter to any type of microcontroller.
What pin is used for ADC operational?
LPC2148 has an inbuilt 10-bit Successive Approximation ADC which is multiplexed among 6/8 input pins of ADC0/ADC1. The ADC reference voltage is measured across GND to VREF, meaning it can do the conversion within this range.
