A tryst with UDS Pt. 2

-
In Pt 1 we took a look at what is UDS. Lets see what it took me to integrate UDS with existing firmware.
We got hold of readymade UDS library which contained partial implementation of UDS. So I had to import the C sources into existing firmware code. Then debug them. And integrate UDS transport layer with eCAN module.
At the same time since we did not have any kind of tester available I ended up writing a small tester application in C++. This application would enable me to verify that the integration of UDS library is correct.
One clever hack I did was get the integrated firmware running somewhat on desktop and then replaced eCAN code with VCAN code (Linux Virtual CAN - socketCAN ). This way I got rid of hardware dependency, or otherwise it would have taken me months to test everything. As it is with this desktop version I was able to speed up the integration and finished it up in about a fortnight.
After I verified that the UDS transport layer is working fine and is indeed complete, I went through the application layer. In application layer I found out that most of the services are left as empty stubs and so another herculean task started. This is implementing all the services as per firmware characteristics. And it goes on till date as of now one month since with about six services implemented.

Comments

Post a Comment

Popular posts from this blog

Morning Quotes

-
Image
Source: www.brainyquote.com   I may be drunk, Miss, but in the morning I will be sober and you will still be ugly. Winston Churchill   Prayer is the key of the morning and the bolt of the evening. Mohandas Gandhi   I look upon death to be as necessary to our constitution as sleep. We shall rise refreshed in the morning. Benjamin Franklin  
Read more

QCalendarWidget CSS Stylesheeting

-
Recently I had to implement a calendar for a TouchScreen application. I resorted to css to modify the calendar widget's appearance so that it would be more accessible. Following is the code that enabled me to get a proper calendar. calendar->setStyleSheet("QMenu { font-size:20px; width: 300px; left: 20px; }"     "QToolButton {icon-size: 48px, 48px; font: 20px; height: 70px; width: 100px; }"     "QAbstractItemView {selection-background-color: rgb(255, 174, 0);}"     "QToolButton::menu-indicator{ width: 50px;}"     "QToolButton::menu-indicator:pressed,"     "QToolButton::menu-indicator:open{ top:10px; left: 10px;}"     "QTableView { font: 30px; }"     "QSpinBox { width: 100px; font: 20px;}"     "QSpinBox::up-button { width:40px;}"     "QSpinBox::down-button { width:40px;}");
Read more

Selecting new phone plan

-
I use a Reliance Jio SIM as my one and only cellphone number. I used to have another, but I found little use for that. So I discontinued that other SIM card. It was a Vodafone SIM and I had bought it thinking I would be using it when I visit my hometown. Turns out it's not usable there. So adios. Coming back to Jio, it was working so far so good for a while. And it was quite cheap. Then they increased the fares about 4-5 months ago. And it was costing ~Rs 7 per day. This was for unlimited Jio-Jio calling, ~300minutes free to other telcos, and 1.5GB daily cellular data. Now I got home internet, so I thought to cut costs on this. The current plan goes for INR555 for 84 days. This includes 1.4GB 4G cellular data per day, 300 min calling to other telcos, and jio-jio free. That's Rs 6.6 per day. Now I'm not even using 30minutes calling per day. And due to home internet my cellular usage has gone down. So I decided to go for some other cheaper plan. This one is INR1299 for 336 da...
Read more