Building on my previous post regarding inclusion of assembly language files in MPLABX projects that use SDCC for PIC18, I thought I would present a real-world example covering Manchester encoding of data to achieve neutral DC bias for RF applications. This seemed like the perfect example to use as the encoding of serial data is, […]
One of the features that I’d like to see added to the SDCC toolchain for MPLABX is the ability to include .asm files in projects and have the tool chain understand them. The current version of the tool chain doesn’t understand how to build and object file from an .asm source file and include this […]
I’m happy enough with my initial test results to zip this up and offer it to anyone who would like to use and/or improve the software. I’ve mentioned this module in a couple of posts during it’s initial development and after having integrated the software into my own project. Feedback is, of course, welcome. The […]
I’ve been integrating the first SDCC implementation of an I2C Master module with my current EE project and the results are positive. While this is but a small piece of a much larger puzzle, I’m pleased that I’ve been able to hit the ground running with this compiler. The C implementation is much shorter that […]
I’ve taken a break from assembly language programming to play with SDCC for PIC microcontrollers. As my first project, I decided to port an I2C Master implementation to C and evaluate the results. So far, I’ve come up with a working echo client and server and I feel as though I’m ready to share the […]
Sometimes, it’s nice to see an example of an implementation that is, otherwise, strewn throughout pages of a datasheet. I decided to pull some serial code out of a debugging file and provide it as an example to anyone who is having trouble getting their Microchip EUSART to perform correctly. The example is thoroughly documented […]
Not long ago, I wrote a post regarding hardware and software interfacing a Maxim DS1620 Digital Thermometer/Thermostat. In my copious free time, I decided to follow through with a working example that displays temperature data on any LCD display that uses the ubiquitous Hitachi 44780 chipset. Below you’ll find a schematic as well as a […]
This is an update to a post that I made a week or so ago. I’ve reverted to using hardware and had good results this week. It took a lot of trial and error, but here we go: When the master implementation is finished, I plan to make the source public. It needs some hardening […]
Updated: For a working example, please read this post next. It provides schematic and software that will display the output of the Maxim DS1620 on any Hitachi 44780-compatible LCD. I was in the shop the other day, putting some FETs away and labeling drawers when I came across a drawer full of DS1620s. I have […]
One of the first things that do in software when beginning a new implementation that utilizes the internal oscillator of a PIC micro device is check the accuracy of the oscillator. Once I’m satisfied that the oscillator frequency is as close to spec as possible, I’ll usually write this to EEPROM data to be read […]