DT 8025 2016 Practical 1 - Revision history

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← Older revision		Revision as of 19:07, 18 September 2016
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−	===[[DT 8025 2016 \|Back]]===	+	===[[DT 8025 2016 \|Back to Course Page]]===

← Older revision		Revision as of 19:05, 18 September 2016
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	'''Part 3.2.''' Observe that the LED blinks more slowly than it is supposed to as the exponential value of the number grows;		'''Part 3.2.''' Observe that the LED blinks more slowly than it is supposed to as the exponential value of the number grows;
	devise a fair interleaving of the tasks such that the blinking speed remains constant.		devise a fair interleaving of the tasks such that the blinking speed remains constant.
		+
		+
		+	===[[DT 8025 2016 \|Back]]===

@@ Line 54: / Line 54: @@
 : 5.00,
 : 13.00,
-: 34.32,
+: 34.34,
+  .
+  .

@@ Line 29: / Line 29: @@
 This function is supposed to calculate the value of '''e^n''' (n = the input parameter) with two degrees of precision and
 return it in a struct comprising its integer part, its fractional part (two digit after the ".", the decimal separator).
-We suggest that you use the [https://en.wikipedia.org/wiki/Taylor_series Taylor series] of the exponential function (at point a=0) and consider the first (n+1) terms in calculation of e^n.
+We suggest that you use the [https://en.wikipedia.org/wiki/Taylor_series Taylor series] of the exponential function (at point a=0) and consider the first (n+1) terms to calculate e^n.
 '''Part 1.2.''' Implement its test suite using a unit testing framework such as CUnit.
@@ Line 76: / Line 76: @@
 After you finish implementing the above-mentioned functions, insert the SD-card into a computer using the USB reader, empty the SD card, and copy the kernel.img into it.
-You should now be able to see the outcome of the exponential funtion on the screen.
+You should now be able to see the outcome of the exponential function on the screen.
 === Part 3: Manual Interleaving ===

@@ Line 59: / Line 59: @@
+  .
-Download the [[media:lab1_2016.zip|lab1_2016.zip]] and complete the implementation for the functions specified in piface.c, i.e.,
+Download the [[media:lab1_2016.zip|lab1_2016.zip]] and complete the implementation of the following functions specified in the file piface.c, i.e.,
   void piface_putc(char c);
@@ Line 74: / Line 74: @@
 Respective commands for clearing the display and moving the cursor can be found inside the LCD's [https://www.sparkfun.com/datasheets/LCD/HD44780.pdf specification].
 After you finish implementing the above-mentioned functions, insert the SD-card into a computer using the USB reader, empty the SD card, and copy the kernel.img into it.

@@ Line 27: / Line 27: @@
    ExpStruct * iexp ( int );
-This function is supposed to calculate the value of '''e^n''' (n = the input parameter) with one degree of precision and
+This function is supposed to calculate the value of '''e^n''' (n = the input parameter) with two degrees of precision and
-return it in a struct comprising its integer part, its fractional part (one digit after the ".", the decimal separator).
+return it in a struct comprising its integer part, its fractional part (two digit after the ".", the decimal separator).
 We suggest that you use the [https://en.wikipedia.org/wiki/Taylor_series Taylor series] of the exponential function (at point a=0) and consider the first (n+1) terms in calculation of e^n.
@@ Line 51: / Line 51: @@
 The output of the program should look like the following:
-: 2.0,
+: 2.00,
-: 5.0,
+: 5.00,
-: 13.0,
+: 13.00,
-: 34.2,
+: 34.32,
+  .
+  .

@@ Line 75: / Line 75: @@
 Respective commands for clearing the display and moving the cursor can be found inside the LCD's [https://www.sparkfun.com/datasheets/LCD/HD44780.pdf specification].
-Note: showExpValue() function does not have to stop printing. When you get to the second line of the screen, go to the first line and replace it with the exponential value of the next integer.
+Note: showExpValue() function does not have to stop printing. When you get to the second line of the screen, go to the first line and replace it with the value of e^(the next integer).
 After you finish implementing the above-mentioned functions, insert the SD-card into a computer using the USB reader, empty the SD card, and copy the kernel.img into it.

@@ Line 41: / Line 41: @@
 Review the [http://cunit.sourceforge.net/example.html examples provided at the CUnit repository] or [http://people.cs.aau.dk/~bnielsen/TOV07/lektioner/cunit-intro-07.pdf the tutorial by Nielsen and Skou].
-Implement a test suite for exponential function, based on the description provided in part 1.1.
+Implement a test suite for the exponential function, based on the description provided in part 1.1.
 In the implementation, you may use your own helper functions, but for each function, you need to provide evidence of test-driven development.
 '''Part 1.3''' Implement iexp(int) and run all your tests.
-=== Part 2: Square Root on Raspberry Pi ===
+=== Part 2: Exponential Function on Raspberry Pi ===
-Write a program that shows the exponential value of natural numbers, starting from 1 and moving upwards, on the PiFace's display connected to the GPIO pins of your Raspberry Pi.
+Write a program that shows the values of the exponential function for natural numbers, starting from 1 and moving upwards, on the PiFace's display connected to the GPIO pins of your Raspberry Pi.
 The output of the program should look like the following:
@@ Line 75: / Line 75: @@
 Respective commands for clearing the display and moving the cursor can be found inside the LCD's [https://www.sparkfun.com/datasheets/LCD/HD44780.pdf specification].
-Note: showSquareRoot() function does not have to stop printing. When you get to the second line of the screen, go to the first line and replace it with the prime factorization of the next integer.
+Note: showExpValue() function does not have to stop printing. When you get to the second line of the screen, go to the first line and replace it with the exponential value of the next integer.
 After you finish implementing the above-mentioned functions, insert the SD-card into a computer using the USB reader, empty the SD card, and copy the kernel.img into it.
-You should now be able to see the outcome of prime factorisation on the screen.
+You should now be able to see the outcome of the exponential funtion on the screen.
 === Part 3: Manual Interleaving ===