Using MPLAB $-$ ADC$\_$LED$\_$Port$\_10$Bit

Project Name: $\_$ADC$\_$LED$\_10$Bit

Description:$-$ This program reads the Analog voltage from the potentiometer on input $"$AN$0($RA$0)"$ and turns ON the $10$ LEDs connected to ports $\backslash (\backslash$mathrm$\{$RA$\}<mn>2</mn>$: $1>\backslash )$ and $\backslash (\backslash$mathrm$\{$RB$\}<mn>7</mn>$: $0>\backslash ).$ The number of LEDs illimunated on $\backslash (\backslash$mathrm$\{$RA$\}<mn>2</mn>$: $1>\backslash )$ and $\backslash (\backslash$mathrm$\{$RB$\}<mn>7</mn>$: $0>\backslash )$ is a $10-$bit binary representation of the ADC value.

Instructions:$-$

$1.$ Setup AN$0/$RA$0$ pin as an Analog input.

Note:$-$ Ensure to set ANS$2$ and ANS$1$ bits high as there is unexplained operation for this exercise if ANS$2$ and ANS$1$ bits are low.

ANSEL $=0$b$11111111$; $//$ Ensure to set ANS$2$ and ANS$1$ bits high

$2.$ Setup PORTA pins RA$<mn>2</mn>$:$1>$ as Digital Outputs

$3.$ Setup PORTB pins $\backslash (\backslash$mathrm$\{$RB$\}<mn>7</mn>$: $0>\backslash )$ as Digital Outputs.

$4.$ Setup the ADC as follows $($see ADCON$0\backslash$& ADCON$1$ registers on pages $114/115$ of the PIC$16$F$188$ Datasheet$)$:$-$

ADCON$0$

$-$ Setup "ADCS$<mn>1</mn>$:$0>"$ bits to select the internal RC oscillator

$-$ Setup $"$CHS$<mn>2</mn>$:$0>"$ to select Channel $0($i$.$e$.$ RA$0/$AN$0)$

$-$ Setup "ADON" bit to turn on A$/$D module

ADCON$1$

$-$ Setup "ADFM" bit to select Right Justified result

$-$ Setup "ADCS$2"$ bit as disabled

$-$ Setup $"$VCFG $\backslash (<mn>1</mn>$: $0>\backslash )"$ bits to use AVDD and AVss

$5.$ Inside a continuous loop, start an ADC conversion by writing to the $"$GO$\_$DONE" bit.

$6.$ Wait until the ADC conversion has completed.

$7.$ Use ADRESH and ADRESL to drive pins RA$<mn>2</mn>$:$1>$ and RB $<mn>7</mn>$:$0>($i$.$e$.$ PORTB$)$ respectively. There is no need to create a variable here since ADRESL and ADRESH values can be used to drive the PORT pins directly.

Tip: For PORTA pins RA$<mn>2</mn>$:$1>$ use bit masking:$-$

$($e$.$g$.$ PORTA $\backslash (=\backslash )$ PORTA $\backslash (/(($A D S R E S H $\backslash$& $0$ b

$8.$ Add comments to your code $($marks lost for no comments$).$

$9.$ Ensure all code is properly indented $($i$.$e$.$ marks lost for no indentation$).$

Inputs:$-1($i$.$e$.$ AN$0($RA$0))$

Outputs:$-10($i$.$e RA$<mn>2</mn>$:$1>,$ RB$<mn>7</mn>$:$0>)$