I carried on with the task of designing the modules in Verilog. I had chosen to work on the Infrared Transmitter and Infrared Receiver. This was quite exciting as it was my first time to work on two modules that work together. I already started designing the code for the modules but it could not be synthesized so I checked the designs again. First, I checked the transmitter design, it only required output so the design was quite straight forward Read more
After a few weeks looking and searching for the right way how to do the query at last I found the answer. I have to follow the tutorial which is Multiple relation to the same model. This thing usually being used if there are cases where a Model has more than one relation with another Model which is same like my situation as I have 2 relations from the same model. This tutorial can be found in CakePHP 2.X Cookbook. Read more
My progress is still slow this week. At first, I struggled with generating an elf binary file from a source code. Dr Shawn reminded me to use the RISCV compiler to generate the elf file. Hence, I read some RISCV documentations and options for linking to get a better understanding of compiling using RISCV compiler. After generating an elf file, I used that to test the simulator. I tried simulating a couple of elf file but I keep getting the Read more
This week was spent drafting and planning the REST API. But before delving into that, there is something that could be useful when developing future applications with Witty. As mentioned in a previous post, we were encountering stability issues with the application. In particular, there was a possibility of encountering an error during simultaneous reading and writing to the database which would then crash the application as an exception is thrown. Fatal Error: Database is locked Since database access is Read more
We had a file server in the office set up to grab data from our remote server daily – for off-site backup purposes. This essentially uses RSYNC over SSH with certificate authentication. The entire process is run as a cron-job daily. However, recently the backups started to fail mysteriously. It had all been working fine before this. Looking at the SSH server logs, it seems that the client seems to be disconnecting at the pre-auth stage. Looking at the client Read more
This week, I made a documentation about naming convention. I learned the importance of documentation and communication because it ensures a smooth workflow of project and it helps someone in the future to understand the concept quickly and continue working on it. Other than that, I study wishbone and learn about the signal between Master and Slave. I find out that signals named ‘stb’, and ‘cyc’ control the timing to latch data. I can manipulate these signals to activate different Read more
At the beginning of this week, I realized I had only another month of internship to go which made me feel bad over the fact that I was not done with at least half of the sensors. I was determined to be as fast as I can in finishing them. I referred to Dr. Shawn regarding the widths of the debouncer design and showed how I had to change few lines of codes that is dependent on the widths of Read more
After doing some reading I managed to find the right SQL. I tested it on PostgreSQL first because that’s how Dr Shawn taught me. He told me before I start working on something I need to know what I want then it will be easy for me to follow the right path. Otherwise all the things that I do will be useless. Next, I have to work with Query Builder in CakePHP. I have to find the right query and Read more
This week did not start off well. Despite spending the weekend trying to get the application to work on the Pi, it still kept on crashing in most parts of the application. This was getting frustrating as it was working on both my computer and the work computers but failed at the actual deployment environment in which we were going to run the application on. When I showed the application to Dr. Shawn on Monday, he noticed that it was Read more
I spent this week measuring the TCP performance of the CORS program. We wanted to know how fast can the board actually perform from a network perspective. I collected data on multiple parameters that I’ve determined to have a considerable impact on speed. I was appalled to find out that the PIC32 was reading data from the network at around 560 Kbit/sec, and after testing, I managed to improve it to 30 Mbit/sec. For my trials I used iperf and Read more