6 files changed, 158 insertions, 3 deletions
diff --git a/sem4/embedded/eksamnen/M65f1.png b/sem4/embedded/eksamnen/M65f1.png
new file mode 100644
index 0000000..2fb34c8
--- /dev/null
+++ b/sem4/embedded/eksamnen/M65f1.png
@@ -0,0 +1,14 @@
+The name is too long, 260 chars total.
+Trying to shorten...
+New name is JO_DQiCm48JlUeebTx-2IKWkImyn29rA3wgzJWNwCLg9uhUljIL6nvtvPaQwSh6vrE3LdCAM8iK2duOf0yP2URKpVO5bCDW36DS4NBzvvq910DGzCEKq4xEBhuQ5j5J_tpDffTox6Jvet-pI2G_7cxTxhzpktNNHb9trWCzBQzFuxCpReqVlar7A80oUrZAyfvgGtUkd3ECvXXg6kXs2GV6Nz1kFgpsrMQFCJFeCjhyU.
+--2020-06-08 09:21:52--  http://www.plantuml.com/plantuml/png/JO_DQiCm48JlUeebTx-2IKWkImyn29rA3wgzJWNwCLg9uhUljIL6nvtvPaQwSh6vrE3LdCAM8iK2duOf0yP2URKpVO5bCDW36DS4NBzvvq910DGzCEKq4xEBhuQ5j5J_tpDffTox6Jvet-pI2G_7cxTxhzpktNNHb9trWCzBQzFuxCpReqVlar7A80oUrZAyfvgGtUkd3ECvXXg6kXs2GV6Nz1kFgpsrMQFCJFeCjhyUMn8Ih7aIaj7p6kNnLufB3VuF
+Resolving www.plantuml.com (www.plantuml.com)... 104.31.70.56, 104.31.71.56, 172.67.211.21, ...
+Connecting to www.plantuml.com (www.plantuml.com)|104.31.70.56|:80... connected.
+HTTP request sent, awaiting response... 200 OK
+Length: unspecified [image/png]
+Saving to: ‘JO_DQiCm48JlUeebTx-2IKWkImyn29rA3wgzJWNwCLg9uhUljIL6nvtvPaQwSh6vrE3LdCAM8iK2duOf0yP2URKpVO5bCDW36DS4NBzvvq910DGzCEKq4xEBhuQ5j5J_tpDffTox6Jvet-pI2G_7cxTxhzpktNNHb9trWCzBQzFuxCpReqVlar7A80oUrZAyfvgGtUkd3ECvXXg6kXs2GV6Nz1kFgpsrMQFCJFeCjhyU’
+
+     0K .......... ....                                        1.27M=0.01s
+
+2020-06-08 09:21:53 (1.27 MB/s) - ‘JO_DQiCm48JlUeebTx-2IKWkImyn29rA3wgzJWNwCLg9uhUljIL6nvtvPaQwSh6vrE3LdCAM8iK2duOf0yP2URKpVO5bCDW36DS4NBzvvq910DGzCEKq4xEBhuQ5j5J_tpDffTox6Jvet-pI2G_7cxTxhzpktNNHb9trWCzBQzFuxCpReqVlar7A80oUrZAyfvgGtUkd3ECvXXg6kXs2GV6Nz1kFgpsrMQFCJFeCjhyU’ saved [15293]
+
diff --git a/sem4/embedded/eksamnen/M7opg.adoc b/sem4/embedded/eksamnen/M7opg.adoc
index 4be491a..f974c6b 100644
--- a/sem4/embedded/eksamnen/M7opg.adoc
+++ b/sem4/embedded/eksamnen/M7opg.adoc
@@ -47,3 +47,13 @@ Eftersom de begge har en complete tid på 20 vil de altid ende på t=40.
 Dette er helt fint i begge tilfælde da ingen af dem har deadline inden 40.
 
 
+=== Opgave 5
+
+
+Implement the example of ex. 4 in JDN's kernel (krnl) on Arduino.
+Measure computation time of task1 with an oscilloscope/logic analyser.
+Measure the time between ready and scheduling instant with oscilloscope/logic analyser.
+Measure the time between ready and completion instant with oscilloscope/logic analyser.
+
+
+=== Løsning
diff --git a/sem4/embedded/eksamnen/M8opg.adoc b/sem4/embedded/eksamnen/M8opg.adoc
index 59f8031..c716a41 100644
--- a/sem4/embedded/eksamnen/M8opg.adoc
+++ b/sem4/embedded/eksamnen/M8opg.adoc
@@ -1,4 +1,5 @@
 = Opgaver til gang 8
+:stem:
 
 == Opgave 1
 
diff --git a/sem4/embedded/eksamnen/m7cap.sr b/sem4/embedded/eksamnen/m7cap.sr
new file mode 100644
index 0000000..7b22690
--- /dev/null
+++ b/sem4/embedded/eksamnen/m7cap.sr
diff --git a/sem4/embedded/eksamnen/notes.adoc b/sem4/embedded/eksamnen/notes.adoc
index 736c275..a1e682a 100644
--- a/sem4/embedded/eksamnen/notes.adoc
+++ b/sem4/embedded/eksamnen/notes.adoc
@@ -7,7 +7,8 @@ Show code and explain for 1,4,5,6 (design and impl ISR, time based
 debouncing, tick routing, limitations)
 ____
 
-TODO med arduino. Og debouncer.
+Se ../m1/int/int.ino.
+Se ../m1/router/router.ino.
 
 == Opgave løsning
 
@@ -303,6 +304,86 @@ ____
 Exercise 1 in part3 on page295 (Pdf is on moodle)
 ____
 
+=== Løsning
+
+____
+_Evaluate the timing requirements of the system_
+____
+
+Det er vigtigt at beskederne mellem sensor og DAC kommer ordenligt igennem.
+Derfor er de dele realtime, mens keypad, display og serial er firm-realtime.
+Det er ikke soft da det stadig er vigtigt for piloten at det han får at vide er rigtigt
+og at hans kommandoer sker hurtigt, men ikke så vigtigt som DAC.
+
+____
+_Define the major software functions to be carried out by the system as a set of
+software subsystems._
+____
+
+User interface::
+    Handles display and keyboard, and gets information from info subsystem.
+    This handles IO with the display and takes input from the user via keypad.
+Info subsystem::
+    Collect information sent from CPU and sends this on serial IO and User interface.
+    It therefore handles the serial IO terminator.
+Processing submodule::
+    Receives updates from sensor and adc, processes the data and sends it to DAC and Info system.
+    Updates to the info system are done non-blocking and because it's only firm
+    updates are okay to not be sent.
+    Updates to DAC are blocking and must be done before the deadline.
+
+____
+_Show all information flow, both between subsystems and to/from IO devices._
+____
+
+Har lavet er på plantuml.
+
+image::M65f1.png[]
+
+----
+@startuml
+component [User Interface] as UI
+component [Info subsystem] as IS
+component [Processing submodule] as PS
+
+interface Keypad
+interface Display
+interface DAC
+interface "Serial IO" as SIO
+interface ADC
+interface CPU
+
+UI -left- Keypad
+UI -right-> Display
+IS -up-> UI
+UI -down-> PS
+
+IS -> SIO
+PS -right-> IS
+ADC -up-> PS
+PS -down- CPU
+PS -down-> DAC
+@enduml
+----
+
+____
+_How would you design the software if all the code had to be contained within a
+single sequential program._
+____
+
+Her ville jeg lave en slags tick router og sørre for at alle task kører super hurtigt.
+For eksempel skulle user interface måske have mere swithing inde i sig selv.
+
+____
+_Redesign the software assuming that interrupt-driven activities are allowed._
+____
+
+Interrupt giver mulighed for at køre OS og preimetive multitasking.
+Jeg vil have hvert subsystem i en task, som så kører med forskellig hastighed.
+
+Hvis sensor kommer apriodisk ville det nok være smart at have en interrupt dertil,
+samt en til keypad.
+
 == H3 module 7
 
 ____
@@ -311,8 +392,6 @@ ____
 
 Se ./M7opg.adoc
 
-TODO lav arduino opgaver. TODO lav måske lidt flere af opgaverne.
-
 === Noter
 
 *Scheduling* er når flere opgaver eller jobs skal time shares på en CPU.
diff --git a/sem4/embedded/m7/m7.ino b/sem4/embedded/m7/m7.ino
new file mode 100644
index 0000000..27b1ea2
--- /dev/null
+++ b/sem4/embedded/m7/m7.ino
@@ -0,0 +1,51 @@
+#include <krnl.h>
+#define STACK 200
+
+char stk1[STACK];
+char stk2[STACK];
+struct k_t *tsk1, *tsk2, *sem1, *sem2;
+
+#define DELAY 100000
+void f1() {
+    k_set_sem_timer(sem1, 50);
+	for(;;) {
+        k_wait(sem1, 0);
+        PORTD &= ~(1 << 5);
+        PORTD |= (1 << 4);
+        k_eat_msec_time(20);
+        PORTD &= ~(1 << 4);
+	}
+}
+
+void f2() {
+    k_set_sem_timer(sem2, 80);
+	for(;;) {
+        k_wait(sem2, 0);
+        PORTD &= ~(1 << 5);
+        PORTD |= (1 << 3);
+        k_eat_msec_time(20);
+        PORTD &= ~(1 << 3);
+	}
+}
+
+void setup() {
+    pinMode(13, OUTPUT);
+    pinMode(3, OUTPUT);
+    pinMode(4, OUTPUT);
+    Serial.begin(115200);
+    Serial.println("Starting");
+
+    k_init(2, 2, 0);
+
+    sem1 = k_crt_sem(0, 1);
+    sem2 = k_crt_sem(0, 1);
+
+    tsk1 = k_crt_task(f1, 10, stk1, STACK);
+    tsk2 = k_crt_task(f2, 10, stk2, STACK);
+
+    k_start(1); 
+}
+
+void loop() {
+
+}