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--- haas:fall2021:common:projects:led0 [2020/09/18 13:28] – external edit 127.0.0.1
+++ haas:fall2021:common:projects:led0 [2021/08/27 21:00] (current) – wedge
@@ Line 20: / Line 20: @@
 =====Background=====
 For this project, you will be writing a C program using the wiringPi library on the Raspberry Pi, wiring up a red LED to your breadboard and witnessing your ability to control it via software.
+=====Grabbing project resources (on lab46)=====
+I have prepared a **grabit** for resources related to this project. To obtain:
+<cli>
+lab46:~/src/SEMESTER/desig$ grabit desig led0
+make: Entering directory '/var/public/SEMESTER/desig/lob0'
+'/var/public/SEMESTER/desig/led0/Makefile' -> '/home/user/src/SEMESTER/desig/led0/Makefile'
+'/var/public/SEMESTER/desig/led0/led0.c' -> '/home/user/src/SEMESTER/desig/led0/led0.c'
+make: Leaving directory '/var/public/SEMESTER/desig/led0'
+lab46:~/src/SEMESTER/desig$
+</cli>
+At which point you can change into the newly created and populated **led0** directory.
+=====Getting project resources from lab46 to your pi=====
+Okay, you've snagged the project files on lab46. Now, how to get them to your pi?
+The same way you've been juggling project files already, by using your mercurial repository!
+Using the **hg** tool, be sure to **add**, **commit**, and **push** successfully on lab46.
+Then, over on your pi, use **hg** to **pull** and **update** the new changes into place. Then you can proceed.
+=====On your pi=====
+Study and run this program on your pi in conjunction with testing and verifying operation of your properly hooked up electronics circuit. When done, submit it on lab46.
+To utilize the needed functionality for this project, you will need to ensure you have the following packages installed:
+  * **build-essential** (hopefully you took care of this in ntr0)
+  * **wiringpi**
+====Installing wiringpi====
+An exception to the usual package installation process, especially for those with a Raspberry Pi model 4B: when you install **wiringpi** the usual way, we may end up with errors when proceeding further, such as the following:
+<cli>
+yourpi:~/src/SEMESTER/desig/led0$ gpio readall
+Oops - unable to determine board type... model: 17
+</cli>
+What you will need to do is manually install an updated (and out of database) version of the **wiringpi** package, as follows (looking out for errors along the way):
+<cli>
+yourpi:~/src/SEMESTER/desig/led0$ wget https://project-downloads.drogon.net/wiringpi-latest.deb
+...
+yourpi:~/src/SEMESTER/desig/led0$ sudo dpkg -i wiringpi-latest.deb
+...
+yourpi:~/src/SEMESTER/desig/led0$ rm -f wiringpi-latest.deb
+</cli>
 =====Input and Output via the GPIO pins on the pi=====
@@ Line 33: / Line 82: @@
 <cli>
-yourpi:~/src/desig/led0$ gpio readall
+yourpi:~/src/SEMESTER/desig/led0$ gpio readall
  +-----+-----+---------+------+---+---Pi 4B--+---+------+---------+-----+-----+
  | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |
@@ Line 60: / Line 109: @@
  | BCM | wPi |   Name  | Mode | V | Physical | V | Mode | Name    | wPi | BCM |
  +-----+-----+---------+------+---+---Pi 4B--+---+------+---------+-----+-----+
-yourpi:~/src/desig/led0$
+yourpi:~/src/SEMESTER/desig/led0$
 </cli>
@@ Line 118: / Line 167: @@
 <WRAP info>The plastic rectangle should have a notch cut out from it, and notice that the ribbon cable connector has a notch included in it. That is a key to indicate how you need to connect the ribbon cable into the T-cobbler</WRAP>
 ====(1) red LED====
 You have a few LEDs included in your kit, some of notably different colours. Go for one of the distinctly red looking ones, resembling the following:
@@ Line 168: / Line 218: @@
 <cli>
-yourpi:~/src/desig/led0$ gpio mode 0 OUT
+yourpi:~/src/SEMESTER/desig/led0$ gpio mode 0 OUT
 </cli>
@@ Line 184: / Line 234: @@
 <cli>
-yourpi:~/src/desig/led0$ gpio write 0 1      ## activate voltage on wiringpi pin 0 (turn on)
+yourpi:~/src/SEMESTER/desig/led0$ gpio write 0 1      ## activate voltage on wiringpi pin 0 (turn on)
-yourpi:~/src/desig/led0$ gpio write 0 0      ## deactivate voltage on wiringpi pin 0 (turn off)
+yourpi:~/src/SEMESTER/desig/led0$ gpio write 0 0      ## deactivate voltage on wiringpi pin 0 (turn off)
 </cli>
@@ Line 198: / Line 248: @@
 In future projects you will start implementing more logic to attain further functionality.
-====Grabbing project resources (on lab46)====
-I have prepared a **grabit** for resources related to this project. To obtain:
-<cli>
-lab46:~/src/desig$ grabit desig led0
-make: Entering directory '/var/public/SEMESTER/desig/lob0'
-'/var/public/SEMESTER/desig/led0/Makefile' -> '/home/user/src/desig/led0/Makefile'
-'/var/public/SEMESTER/desig/led0/led0.c' -> '/home/user/src/desig/led0/led0.c'
-make: Leaving directory '/var/public/SEMESTER/desig/led0'
-lab46:~/src/desig$
-</cli>
-At which point you can change into the newly created and populated **led0** directory.
-====Getting project resources from lab46 to your pi====
-Okay, you've snagged the project files on lab46. Now, how to get them to your pi?
-The same way you've been juggling project files already, by using your mercurial repository!
-Using the **hg** tool, be sure to **add**, **commit**, and **push** successfully on lab46.
-Then, over on your pi, use **hg** to **pull** and **update** the new changes into place. Then you can proceed.
-====On your pi====
-Study and run this program on your pi in conjunction with testing and verifying operation of your properly hooked up electronics circuit. When done, submit it on lab46.
-To utilize the needed functionality for this project, you will need to ensure you have the following packages installed:
-  * **build-essential** (hopefully you took care of this in ntr0)
-  * **wiringpi**
-===Installing wiringpi===
-An exception to the usual package installation process, especially for those with a Raspberry Pi model 4B: when you install **wiringpi** the usual way, we may end up with errors when proceeding further, such as the following:
-<cli>
-yourpi:~/src/desig/led0$ gpio readall
-Oops - unable to determine board type... model: 17
-</cli>
-What you will need to do is manually install an updated (and out of database) version of the **wiringpi** package, as follows (looking out for errors along the way):
-<cli>
-yourpi:~/src/desig/led0$ wget https://project-downloads.drogon.net/wiringpi-latest.deb
-...
-yourpi:~/src/desig/led0$ sudo dpkg -i wiringpi-latest.deb
-...
-yourpi:~/src/desig/led0$ rm -f wiringpi-latest.deb
-</cli>
 =====Compiling=====
@@ Line 275: / Line 276: @@
 <cli>
-lab46:~/src/desig/led0$ submit desig led0 led0.c
+lab46:~/src/SEMESTER/desig/led0$ make submit
-Submitting desig project "led0":
-    -> led0.c(OK)
-SUCCESSFULLY SUBMITTED
 </cli>

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