STC microcontrollers sometimes comes with built-in ADC. It can be a little bit tricky to use as the relevant pins have to be switched between analog and digital mode.
Remember back in part 3 I wrote the timing code? That code only works with a 24MHz clock. And I didn’t have the watchdog running yet. So I am gonna fix it.
The bug I encountered on STC15W4K61S4 is resolved: this chip, being much more complicated than the traditional 8051 my textbooks was written for, have a bit of quirks that can break code compatibility between them.
I am digging deeper into the STC 8051 ecosystem by attempting to write my first bits of actual code on this platform. This experiment took me a few days to execute as I need to wrestle a few bugs along the way, and ended up getting me ordering a few samples from STC directly.
STC proudly claims that their MCU are fast. And from what I see in their core clock timing table they have a new core design that accelerated the instructions a lot. So how fast is it? Continue reading Exploring STC MCU Part 2 – So how fast is it?
It seem to me that there are some interest in ultra cheap microcontrollers. The Chinese brand STC makes a few 8051-compatible MCU which sells at ridiculously cheap prices.
I have an old Dell Latitude D620 with Intel Core Duo T2300E processor, 4GB of RAM (aftermarket upgrade kit,) and nVidia Quadro NVS 110M graphics. The machine was sitting in storage for quite a while, but I suddenly I find myself in the need of a Windows-running PC with a real serial port for some maintenance work on my KVM adapter and my managed switch. So I decided to take it out of mothballs and give it somewhat a new life.
Soon after I delivered his order, Josh wrote a post on his blog about my USB to UART adapter line and the SHONEv1 LSOF project. I am so stoked!
Thank you Josh for praising my product and service, and I am going to roll a few SHONEv2 boards (and some testing gear DIY too) very, very soon. Sit tight and wait for it 🙂
Recently a (quite wasteful) tax metering system upgrade generated loads of e-waste and a good source of dumpster diving. I scored a set of such tax metering hardware for PCs. I got the disused boards and peripherals, but not the computer itself.
I decided to check how much of the disused system I can repurpose and reuse in my own designs.
I am pretty surprised to find out this is happening when I was debugging my L2TP/IPSec tunnel: someone is trying very hard to guess my root password over SSH. A quick check proved to me that my private cloud is under attack too.