Aczid's blog

Our device showing off.

For a school project I have teamed up with a friend to create a small embedded system. He had this old serial cash register display lying around which can display semi-alphanumeric strings (actually just 0-9 and the letters H, E, L and P). We’ve programmed a PIC16F636 in C to encode data with RS232 timing and send it through our own circuit which connects to a serial port. Since this PIC chip doesn’t have a hardware UART, we’ve coded a software UART using inline assembly. We’ve created a report about this, which I will only release in Dutch. I believe it should be obvious what’s going on from a technical standpoint.
Here’s the PDF.