A programmable, switched PSU can also be used as a function generator. The diagram above illustrate how we can change duty cycle of the input PWM to create a DC waveform out. This is actually one of the techniques we use to run 3-phase motors, but it also have the potential to become an awesome…
I need to address one more electronic designs – I need a 15A PSU for my robot. I did a vero board design earlier using 4 x DC/DC converters due to their low cost. This delivers 12A in peak which is what I need with 12 x servo’s to allow them all to operate simultaneously.…
Just realised that I have produced 15 different electronic designs of which 14 contain a MCU the last 6-8 months. I have several other designs in the planned pipeline, but I am holding back a little because I am getting a huge backlog of designs I need to finish coding for. The challenge is that…
Developers of C/C++ will probably be a little confused over the lack of pointers. I use syntax like: Func MyFunc(MyObject ob) What is “ob”? Am I sending the full object, a reference or a pointer? Func MyFunc(MyObject ob, uint32 i) ob.myParameter = 1 i=2 End MyObject foo uint32 var Call MyFunc(foo, var) In…
I need to evolve my Event trigger mechanism. Lets assume we want to control a robot with 2 electric motors – one left and one right. We are currently running forward with 1000 RPM and want to reverse with 10RPM. Assign leftMotor.direction = reverse Assign rightMotor.direction = reverse Assign leftMotor.speed = 10 Assign rightMotor.speed=10 The…
One of the key objectives with Plain is to support distributed systems. The mechanism to do so is at the core of the VM and this is one of the areas where the VM really makes sence. We have already described objects – data structures that map into C code with Events. We have briefly…
The VM is designed to control logic so everything is mapped into a 32 bit virtual register for simplicity. The assembly language support a large range of data types, but the VM will by default treat everything as a 32 bit register to keep it simple and fast. The assembly language do however support a…
I just realized that I probably can optimize the assembly a little by introducing “End” as a single entry instruction. The reason is because we now use goto that are 2 entries. I can avoid the 2. entry by using the stack. for x=1 to 10 nop end As “for” is an instruction it…
I will need to look more into the examples and high- and low-level syntax later, but I basically want the assembler to be almost a 3. generation language. What I will do next is to revisit the instruction set to see if we can improve this a bit. Looking at the previous examples I get…
I used a bit of space on If, so I will just quickly draft the rest of the instructions in High Level Assembly syntax and Low Level Assembly syntax assuing I need both – we can discuss the draft and possible changes later. For loop for A=1 to 10 step 1 nop end Low Level Assembly:…