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#MPLAB XC8 EXAMPLE CODE DRIVER#
#MPLAB XC8 EXAMPLE CODE FULL#
#MPLAB XC8 EXAMPLE CODE SOFTWARE#

Configure pin as analog (Refer to the ANSEL register).

#MPLAB XC8 EXAMPLE CODE DRIVER#

Disable pin output driver (Refer to the TRIS register).

ACD Control Register ADC CONVERSION PROCEDUREįollow the procedure for using the ADC to perform an Analog-to-Digital conversion: The 1/2 LSb error is the maximum error allowed for the ADC to meet its specified resolution. This equation assumes that 1/2 LSb error is used (1,024 steps for the ADC). To calculate the minimum acquisition time, Equation 16-1 may be used. After the analog input channel is selected (or changed), an ADC acquisition must be done before the conversion can be started. As the source impedance is decreased, the acquisition time may be decreased. The maximum recommended impedance for analog sources is 10 kohm. The sampling switch (RSS) impedance varies over the device voltage (VDD). The source impedance (RS) and the internal sampling switch (RSS) impedance directly affect the time required to charge the capacitor CHOLD. The sampling switch (RSS) impedance varies over the device voltage (VDD),For the ADC to meet its specified accuracy, the charge holding capacitor (CHOLD) must be allowed to fully charge to the input channel voltage level. The ADFM bit of the ADCON1 register controls the output format. The 10-bit ADC conversion result can be supplied in two formats, left justified or right justified. The ADIF bit must be cleared in software. The ADC Interrupt Enable is the ADIE bit in the PIE1 register. The ADC Interrupt Flag is the ADIF bit in the PIR1 register.

The ADC module allows for the ability to generate an interrupt upon completion of an Analog-to-Digital conversion.

#MPLAB XC8 EXAMPLE CODE FULL#

One full 10-bit conversion requires 11.5 TAD periods. The time to complete one bit conversion is defined as TAD. FRC (dedicated internal FRC oscillator).

#MPLAB XC8 EXAMPLE CODE SOFTWARE#

The source of the conversion clock is software selectable via the ADCS bits of the ADCON1 register. The ADPREF bits of the ADCON1 register provides control of the positive voltage reference. When changing channels, a delay is required before starting the next conversion. The CHS bits of the ADCON0 register determine which channel is connected to the sample and hold circuit. There are up to 30 channel selections available: When converting analog signals, the I/O pin should be configured for analog by setting the associated TRIS and ANSEL bits. The ADC can be used to convert both analog and digital signals. When configuring and using the ADC the following This interrupt can be used to wake up the device from Sleep. The ADC can generate an interrupt upon completion of a conversion. In PIC Controller PIC16F1517 the ADC voltage reference is software selectable to be either internally generated or externally supplied. The converter generates a 10-bit binary result via successive approximation and stores the conversion result into the ADC Result Registers. The output of the sample and hold is connected to the input of the converter. This device uses analog inputs, which are multiplexed into a single sample and hold circuit. The Analog-to-Digital Converter (ADC) allows conversion of an analog input signal to a 10-bit binary representation of that signal. ADC module comes to help as we need to process this data under CPU in digital format. To read this type of Analog data from real world we need to convert into digital format. There are many source of physical data values like temperature, pressure, current, voltage, distance sensor which produce an Analog signal in 0-20ma or 0-5V or 0-10V. In order to read the physical data from real world and process under CPU in the digital form we need Analog to Digital converter. This is an in build component available almost in all PIC Microcontroller. The ADC Module in PIC microcontroller stand for Analog to Digital converter Module.