From 1ec4500b945384f34e21855f580cfc0de3311284 Mon Sep 17 00:00:00 2001
From: LailaTheElf <mail@lailatheelf.nl>
Date: Fri, 26 Sep 2025 17:18:54 +0200
Subject: [PATCH] spellcheck

---
 assets/assignment_4.2.zip | Bin 332533 -> 333139 bytes
 report-2/week_1.3.md      |  16 ++++++++--------
 report-2/week_1.4.md      |  22 +++++++++++++---------
 3 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/assets/assignment_4.2.zip b/assets/assignment_4.2.zip
index 74c8e5b845b279e8f81be7ac37dc0158693fdd6c..f474ba3457e5d882803645bdc7ce69ed7a0d48fa 100644
GIT binary patch
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diff --git a/report-2/week_1.3.md b/report-2/week_1.3.md
index dbff569..af3fc9b 100644
--- a/report-2/week_1.3.md
+++ b/report-2/week_1.3.md
@@ -56,7 +56,7 @@ int main(void)
 }
 ```
 
-I measured the resulting frequency with an logic analyser ([[#logic-analiser-view-of-LEDs-for-assignment-31]]; channels are collerd to the led color). It measuerd a period time of $499.568ms$, I call this error could be my cheap logic analyser or en error in the internal oscilator.
+I measured the resulting frequency with an logic analyser ([[#logic-analiser-view-of-LEDs-for-assignment-31]]; channels are coloured to the led colour). It measured a period time of $499.568ms$, I call this error could be my cheap logic analyser or en error in the internal oscillator.
 
 ![Logic analiser view of LEDs for assignment 3.1](https://live.kladjes.nl/uploads/84591270-95b0-4601-aea2-ca44b51adbf9.png)
 
@@ -152,7 +152,7 @@ int main(void)
 
 > C) Why must the flag variable be defined as volatile?
 
-becouse the compiler doesn't know when `flag` changes. Without `volatile` optimisations can think it does not change at all.
+because the compiler doesn't know when `flag` changes. Without `volatile` optimisations can think it does not change at all.
 
 ## assignment 3.4
 
@@ -290,13 +290,13 @@ int main(void)
 }
 ```
 
-Again I validated the timesing with the logicanalyser.
+Again I validated the timings with the logic-analyser.
 
 ![](https://live.kladjes.nl/uploads/16fe6424-cff1-4ce4-b506-7f8d87ec4dc4.png)
 
 ## assignment 3.6
 
-> - reate a copy of the previous project and rename it to opdr_3_6.
+> - create a copy of the previous project and rename it to opdr_3_6.
 > - Using the description of this assignment, define a struct for a “task” and create a global array of 8 empty tasks.
 > - Create a function `addTask(...)` to help create a task from a function pointer and other parameters, and add it to the task list (the array) at an appropriate index.
 > - Create 4 functions to toggle each led separately, these are the functions that will correspond to 4 tasks.
@@ -428,9 +428,9 @@ int main(void)
 
 ## Assignment 3.7
 
-> Now add initial delays5 (in systicks) to your tasks. Use an initial delay of 100, 200, 300, and 400 for green, orange, red, and blue respectively. Make use of a logic analyzer to verify the timing.
+> Now add initial delays (in systicks) to your tasks. Use an initial delay of 100, 200, 300, and 400 for green, orange, red, and blue respectively. Make use of a logic analyser to verify the timing.
 
-When A task is created, in the version of [[#Assignment 3.7]], the folloing function is used: 
+When A task is created, in the version of [[#Assignment 3.7]], the following function is used: 
 
 ```c
 bool addTask(void  (*fn)(void), uint32_t counter)
@@ -446,9 +446,9 @@ bool addTask(void  (*fn)(void), uint32_t counter)
 }
 ```
 
-Here the `counter` and `counter_rst` menbers are set to the same value. `counter` is the counter that is decremented eacht SysClock. `counter_rst` is the value `counter` is reset to if it reachts 0 after the task is run.
+Here the `counter` and `counter_rst` members are set to the same value. `counter` is the counter that is decremented each SysClock. `counter_rst` is the value `counter` is reset to if it reacts 0 after the task is run.
 
-Setting `counter` to the initail delay already solves this assignment. The foloing code implements this change.
+Setting `counter` to the initial delay already solves this assignment. The following code implements this change.
 
 ```c {.numberLines}
 #include <stdint.h>
diff --git a/report-2/week_1.4.md b/report-2/week_1.4.md
index 25a8386..b9a25ab 100644
--- a/report-2/week_1.4.md
+++ b/report-2/week_1.4.md
@@ -11,15 +11,15 @@
 
 ![](https://live.kladjes.nl/uploads/1cdce708-a2e7-4a3d-b727-d5423b892687.png)
 
-In the Code it the values for blocking delay are 100, 200, 400, 800 for green, orange, red, blue. The `blocking_delay` function wait for this number of SysTicks, witch is set to $1ms$. I measure delays of $0.4s$, $0.8s$, $1.6s$ and $3.2s$. This is indeed 4x slower of what I would expect on first flance. This delay is becouse this is a preemtive scheduler, the other tasks run in between. There are 4 task all with the same priority, so each task takes 4 time longer.
+In the Code it the values for blocking delay are 100, 200, 400, 800 for green, orange, red, blue. The `blocking_delay` function wait for this number of SysTicks, witch is set to $1ms$. I measure delays of $0.4s$, $0.8s$, $1.6s$ and $3.2s$. This is indeed 4x slower of what I would expect on first glance. This delay is because this is a preemptive scheduler, the other tasks run in between. There are 4 task all with the same priority, so each task takes 4 time longer.
 
 ## Assignment 4.2
 
-> A) mplement a non-blocking delay so that a task can request the OS to be kept out of the scheduling loop for a certain number of system ticks. The scheduler should remain preemptive and perform round-robin on all the available(not delayed) tasks. Once the requested number of system ticks have passed, the scheduler should include the task in the selection process. You may use the `taskYield()` function to let the OS know a task is ready to be switched out.
+> A) implement a non-blocking delay so that a task can request the OS to be kept out of the scheduling loop for a certain number of system ticks. The scheduler should remain preemptive and perform round-robin on all the available(not delayed) tasks. Once the requested number of system ticks have passed, the scheduler should include the task in the selection process. You may use the `taskYield()` function to let the OS know a task is ready to be switched out.
 
-To allow for a non blocking delay the OS sould keep track of the time the to wake it up on the corect time. I did this by adding the new task state `SLEEPING_DELAY` to the enum. 
+To allow for a non blocking delay the OS should keep track of the time the to wake it up on the correct time. I did this by adding the new task state `SLEEPING_DELAY` to the `enum`. 
 
-There already is an counter in the task struct. but no function that decrements this counter. So I added the folloing function the the OS.
+There already is an counter in the task struct. but no function that decrements this counter. So I added the following function the the OS.
 
 ```c
 void decrement_sleeping_delay()
@@ -41,9 +41,9 @@ void decrement_sleeping_delay()
 }
 ```
 
-This function is added to the `SysTick_Handeler` before the cudeule is run. So that if the counter is 0 the `decrement_sleeping_delay` makes the task ready again, and waits one more SysTick.
+This function is added to the `SysTick_Handeler` before the scheduler is run. So that if the counter is 0 the `decrement_sleeping_delay` makes the task ready again, and is directly available for to be scheduled. This makes a delay of 0, wait for the next SysTick.
 
-The `SysTick_Handeler` now look like the folloing
+The `SysTick_Handeler` now look like the following
 
 ```c
 void SysTick_Handler(void)
@@ -58,7 +58,7 @@ void SysTick_Handler(void)
 }
 ```
 
-Before stating to write the delay function for the tasks, in the `schedule` funciton the line that sets the current task to ready sould be removed (line 163 in `VersdOS.c`). If the state is chanced during execution of the task, this line reset is at the next try to reschedule ths state back to `READY` so the state will never actualy be changed.
+Before stating to write the delay function for the tasks, in the `schedule` funciton the line that sets the current task to ready sould be removed (line 163 in `VersdOS.c`). If the state is chanced during execution of the task, this line reset is at the next try to reschedule this state back to `READY` so the state will never actually be changed.
 
 As last the delay function itself.
 
@@ -75,6 +75,10 @@ Now all the line `extern void delay(uint32_t ticks);` can be added to the begin
 
 ### Result
 
-![](https://live.kladjes.nl/uploads/c65810e2-a5fc-48f3-be6b-2f30acc5747a.png)
+![logic-analyser measurement of the preemptive scheduler](https://live.kladjes.nl/uploads/c65810e2-a5fc-48f3-be6b-2f30acc5747a.png)
+
+This implementation works, only the delays are a bit off. To make it a nice counter again all delays should be decremented by one (figure [[#logic-analyser measurement of the preemptive scheduler]] shows the output with the original timings, not the decremented ones).
+
+## Assignment 4.3
+
 
-This implementation works, only the delays are a bit off. To make it a nice counter again all delays should be decremented by one.