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Arm Notes

on May 17, 2012

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peripherals.pdf

Arm notes

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C program to find the frequency of occurrence of digit in the given number

#include <stdio.h> #include <stdlib.h> int main() { long num; int digit,rem,count=0; printf("Enter the Number: "); scanf("%ld",&num); printf("Enter the digit to be counted:"); scanf("%d",&digit); while(num!=0) { rem=num%10; if(rem==digit) count++; num=num/10; } printf("The digit %d present %d times ",digit,count); }

Verilog code for serial Adder

Block Diagram : `resetall `timescale 1ns/1ns //shift register to store the two inputs a and b to be added module shift(y,d,clk); input [3:0] d; input clk; output [3:0] y; reg [3:0] y; initial begin assign y=d; end always @(posedge clk) begin assign y=y>>1; end endmodule //serial in parallel out register to store the 4 bit sum module sipo(y,s,clk); input s; input clk; output [3:0] y; reg [3:0] y; always @(posedge clk) begin assign y={s,y[3:1]}; end endmodule //1 bit full adder module fa(s,cout,a,b,cin); input a,b,cin; output s,cout; assign {cout,s}=a+b+cin; endmodule //d flipflop to store the cout of each stage module dff(q,d,clk); input d,clk; output q; reg q; initial begin q=1'b0; end always @(posedge clk) begin q=d; end endmodule //main module serial adder// module serial(sum,cout,a,b,clk); input [3:0] a,b; input clk; wire [3:0] x,z; output [3:0] sum; output cout; wire s,cin; //input cin; //initial begin

8051 assembly code to generate triangular wave

ORG 0 CLR A UP:INC A MOV P2,A CJNE A,#0FFH,UP LCALL DELAY DOWN: DEC A MOV P2,A CJNE A,#00,DOWN LCALL DELAY SJMP UP END

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Arm Notes

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