Arduino for STM32

Most of LED panels are like multiple 74HC595 in series. Even signal names are similar (clock, strobe and output enable). Output of one color can be connected to an input of next color. If there is A,B,C,D or similar letters on a input/output connector, it means they are multiplexed. Most probably P-...

I tested it on bluepill ( STM32F103C8 with 128KB of flash). I don't know about STM32F103RC )

See if there is some item in device manager with yellow exclamation mark.
Try different USB port.
Try different USB cable.

now, how do I know available timers and pins related to them? One way of figuring out which pin is related to which timer/channel is from Arduino core: https://github.com/stm32duino/Arduino_Core_STM32/blob/main/variants/STM32F1xx/F103C8T_F103CB(T-U)/PeripheralPins.c#L86-L132 I'm a little confused a...

Check in device manager (right click "ThisPC->manage") is there a device named "Maple"

Just an a idea for experiment: Attach interrupt on RW falling, and if DS is low grab data? It would trigger on every write, but writes on 6502 is not so often. As long as ISR is shorter than 4µS, it should be working for latency up to 800, maybe 900nS. Something like: attachInterrupt(digitalPinToInt...

That code was for Apple 2. I am not familiar with its hardware , but code should be same: code1.jpg I can't say much about execution time of code generated with compilers, but i know that it's never one instruction per one CPU cycle. Anyway, by looking at datasheet you posted in first post, i still ...

So appears to be working? My mistake, i missed value <<= 1; Unfortunately, until you measure bluepill's interrupt latency i can't say in what point in time you are reading data bus. But don't forget that you have info on BUS01, DS and RW also, so you can guess when the reading is done. I don't thin...

This is little confusing for me: uint32_t displaymask = 1 << 31; if (value & displaymask) } Did you mean if (value & c) 1. not sure why you needed the while loop in the DS_ISR() -> it wouldn't be triggered unless you are on a falling edge. It's because 6502 timing. Adrress and RW is stable 3...

As i recall from 6502 timings, your goal is to read data bus at rising edge of BUS0. . Maybe you are reading data bus too late. Try to attach interrupt at falling edge of DS , and while BUS0 is low, keep reading data bus... attachInterrupt(digitalPinToInterrupt(DS), DS_ISR, FALLING); volatile uint32...

Hello After having some experiments with encoder on breadboard with STM32F411CE (WeAct board), i am made simple example to use it with timer working in hardware encoder mode. Tested with all combinations of pins that can be used for encoder input. I didn't use any debounce hardware, encoder module h...