How can I edit this C code to make sure that the letter P and L would show up separately one at a time on an interval of one second on a raspberry pi?
1 #include <stdio.h>
2 #include <unistd.h>
3 #include "sense.h"
4
5 #define WHITE 0xFFFF
6
7 int main(void) {
8 // getFrameBuffer should only get called
once/program
9 pi_framebuffer_t
*fb=getFrameBuffer();
10 sense_fb_bitmap_t
*bm=fb->bitmap;
11
12 bm->pixel[0][0]=WHITE;
13 bm->pixel[0][1]=WHITE;
14 bm->pixel[0][2]=WHITE;
15 bm->pixel[0][3]=WHITE;
16 bm->pixel[0][4]=WHITE;
17 bm->pixel[0][5]=WHITE;
18 bm->pixel[1][5]=WHITE;
19 bm->pixel[2][5]=WHITE;
20 bm->pixel[3][5]=WHITE;
21 bm->pixel[3][4]=WHITE;
22 bm->pixel[3][3]=WHITE;
23 bm->pixel[2][3]=WHITE;
24 bm->pixel[1][3]=WHITE;
25
26
27 sleep(1);
28
29
30 bm->pixel[0][0]=WHITE;
31 bm->pixel[0][1]=WHITE;
32 bm->pixel[0][2]=WHITE;
33 bm->pixel[0][3]=WHITE;
34 bm->pixel[0][4]=WHITE;
35 bm->pixel[0][5]=WHITE;
36 bm->pixel[1][0]=WHITE;
37 bm->pixel[2][0]=WHITE;
38 bm->pixel[3][0]=WHITE;
39
40
41 /*
42 void drawCFB(void);
43 drawCFB();
44 */
45
46 sleep(1);
47 freeFrameBuffer(fb);
48 return 0;
49 }
50
In: Computer Science
Find the (a) amplitude, (b) period, (c) phase shift (if any), (d) vertical translation(if any), and (e) range of each function. then graph the function over at least one period.
1) y=-1/4 sin(3/4x+180degrees/8)
2)y=-3+3sin1/2x
3)y=2/3cos(x=180degrees/2)
In: Advanced Math
Write a Java program to
1. read in the size of a square boolean matrix A
2. read in the 0-1 matrix elements
3. read in a positive integer n
4. display A^n
In: Computer Science
Solve the following IVPs and determine the interval of validity of the solution.
(i)y′ = √1+x2 , y(0)=1
(ii)y′ =e−y(x−2), y(4)=0
In: Advanced Math
Use the substitution method to prove the solutions for the following recurrences:
|
Recurrence |
Solution |
|
|
1 |
T(n) = T(n-1) + n |
O(n2) |
|
2 |
T(n) = T(n/2) + 1 |
O(lgn) |
|
3 |
T(n) = T(n/2) + n |
ϴ(nlgn) |
|
4 |
T(n) = 3T(n/2) + n |
O(nlg(3)). |
|
5 |
T(n) = 2T(n/2) + n2 |
O(n2) |
|
6 |
T(n) = 4T(n/2 + 2) + n |
O(n2) |
|
7 |
T(n) = 2T(n – 1) + 1 |
O(2n) |
|
8 |
T(n) = T(n – 1) + T(n/2) + n |
O(2n) |
|
9 |
T(n) = 4T(n/2) + cn. |
ϴ(n2) |
In: Computer Science
Show manual calculations to illustrate how the following operations would be performed in MATLAB.
Determine the result and the size of the following expression.
Note that the later
arrays may depend on the definition of earlier arrays
(a) a = 6:-3:-4
(b) b = [ a’ a’ a’]
(c) c = b(1:2:3, 1:2:3)
(d) d = b(3:-2:1,: )
(e) w = [zeros(1,3) , ones(3,1)’ , 3:5’]
In: Computer Science
4. Prove that if there are two operators A, ˆ Bˆ, such that
their commutator [A, ˆ Bˆ] = λ where
λ is a constant. Show that (6 points)
exp[μ(Aˆ + Bˆ)] = exp(μAˆ) exp(μBˆ) exp(−μ
2λ/2)
where given an operator Xˆ; exp(tXˆ) = 1 + tXˆ +
1
2
t
2Xˆ 2 + ... +
1
n!
t
nXˆ n + ... (the usual
exponential series implemented for operators).
In: Physics
Problem 6: R simulation.
Use different color lines and appropriate legend to
(1) plot the density functions of χ 2 k for k = 1, 2, 3, 4, 6, 9 in one figure;
(2) plot the density functions of tk for k = 3, 5, 10, 30 and N(0, 1) distribution in one figure. Describe respectively what you observe when the degree of freedom increases.
In: Math
In: Nursing
Given the integral 1/x dx upper bound 2 lower bound 1
(a) use simpson's rule to approximate the answer with n=4
Formula:f(x)=1/3[f(x0)+4f(x1)+2f(x2)+...+f(xn)]Δx(keep answer to 6 decimals)
b)how large is n in order for the error of Simpsons rule for the given integral is no more than 0.000001
Formula: |Es|=(k)(b-a)^5/(180 n^4), where |f^4(x)≤k|
please show all work and steps
In: Advanced Math