MicroPython Forum (Archive)

The normal way to do this is in two stages. Use a hardware timer to trigger a reading interrupt handler. Read the value in the interrupt handler and save it to a circular buffer, doing the least amount of of work. This can now be read outside of the interrupt. If your interrupt priority is set up co...

Totally agree. Nuff said.

If you only have a native queues managed by a mutex (like I did in my mp port), you can get a long way there. (AmigaOS was basically co-operative threads with messages passed between threads in queues with all the data shared in a single address space. The scheduler simply distributed between thread...

It would be an interesting outcome if entity level locking was added to the micropython data structures. Micropython could well become a choice over cpython, even under Linux, for situations where real threading is needed. Now that normal CPUs have more and more cores and removing the GIL has proven...

LZO would be an interesting choice. The decompresser is very small. It would be fun to make a plugin. I'll give it a go next week.

Just something to keep in mind is you can't allocate python objects when in an interrupt handler. (I pre-allocated them, but just using a simple C circular queue is probably more sensible).

Each to their own. For my ESP code, I use the system main loop as an execution thread and then do everything else in interrupts. For example, for the buttons, I attach an interrupt handler on both edges and, in the handler I send a message down a queue. (For my queue I wrote one in C but used pre-al...

NodeMCU from aliexpress: 405 tests performed (13213 individual testcases) 405 tests passed WEMOS D1: 405 tests performed (13213 individual testcases) 405 tests passed Itead studio 'sonoff' ESP with a PSU and relay on board. 405 tests performed (13213 individual testcases) 405 tests passed An origina...

I have a Ds3231 and have used my own ESP8266 fork with multi byte read i2c.write([self.DS3231_ADDR_TIME], self.DS3231_DEVICE_ADDR) return self.format_da(list(map(self.bcdToDec, i2c.read(7, self.DS3231_DEVICE_ADDR)))) So, it's not a problem with the bit banging I2C and ESP8266 (ie. it is totally fixa...

Sure you can write the core in C (I have not used c++). There are quite a few examples on the forum and some good ones in the source tree. I have done about 5 C device drivers, it's pretty easy if you can find examples of how to manipulate the python data, so for example the 1wire python binding:htt...