One key component of any Parser is the Expression Parser. This one is used to parse mathematical or logical expressions into a list of micro-statements. Plain have a separate instruction to execute math, but the parser need to build the list correct. Example : 4 + 5 * 3 If we add 4+5 we get…
One of the challenges I have with Worldpress is to be able to show source code in here, so I apologize for the bad quality on the examples above. The examples show one of my Plain test examples in 2 different syntax styles. the one to left is the currently chosen one and the one…
The Assembler itself will read Plain source code and generate a RTL file that is downloaded to the device. RTL (Real Time Linker) is located on the target device and will convert RTL format to executable Plain VM instructions. Most modern Assemblers are very similar to Compilers. The main difference is that the Assembler have…
I started this blog with a Train Control System that basically failed big time on the positioning system. The solution I attempted was possible, but to large and expensive for small model trains. I later upgraded the control system to ESP32 which definitely is the path forward, but it is time to make another attempt…
I have done a mistake by leaving EN_BUCK floating. The doc is a little vage around this area and I have copied that from other references that probably was not using the Buck Converter. The buck converter works, but it seems to give very little out. 168Mhz uses more than 84Mhz and power starts misbehaving.…
The yellow line is 5V and the blue line is 3.3V. I connected my scope to see if I saw something and the good news that it is not an interference problem at all. I basically have a horrioble ripple situation out from DRV8213. This indicate that my capacitors are not doing its job at…
Testing Thunderstick I started to notice strange behavior as I increased MCU frequency – in fact I am unable to tick the MCU above 84Mhz powered from the DRV8301 Buck Converter. This indicate that I have interference between the Buck Converter and the MCU on higher frequencies. To prove my case I powered the board…
This MCU was hard to re-solder. You can see why by looking at the picture. I had a heck of a challenge with removing short-cuts and making sure every pin was soldered, but finally the Led blink normally and current usage is back to 10mA. Another modification I need on some of the motor controllers…
What I have done here is to draw the circuit for DC-Rail and copied 2 resistor values without changing them – doh. I also assembled according to this and testet 30V, meaning I have injected 15V on a 3.3V ADC port – hmmm – wonder if that still works 🙁 To make things even worse…
I have a strong preference for making some doc I call “Annotated Schematics” as I start coding and making a project. This doc break up and explain the schematics, programming info etc and everything I basically need as a SW developer to get going. The annotation above is the 3D model annotated to show content…