MicroPython Forum (Archive)

ok, sorry - I stumbled across this:
https://github.com/LimiFrog/LimiFrog-SW ... mifrog.pdf

I'll give it a try then!

Thanks for the update. Regarding firmware update on the limifrog: I was wondering if you managed to download the firmware via USB DFU (instead of taking the ST-link debugger)? I haven't seen it mentioned in the docs. Since BOOT0 is wired to switch3 I think it should be possible, but I didn't succeed...

badi wrote:I wrote some very simple drivers for the sensors on limifrog board which are available here:
https://github.com/tobbad/limifrog
I maybe convert them to a more micropythonic style.

@badi: this link appears to be broken - is there an alternative one?

yeah you are right. I thought the OPs question was targeting on how to hookup a 5V I2C device to a 3V MCU. sorry about the confusion I may have created.

My sole concern is clarity. Users of the forum should know which topics get official support. And potential buyers of products offering MicroPython should be aware whether the code is open source. This second point is vitally important in my view. Fully agree on this one. Somewhen this forum must d...

If you look in the stmhal/build-Xxxx directory, you'll see that we generate a pins_af.py file that provides the alternate functions for all of the pins included in pins.csv. Yes I'm aware of that. My point was that the existing pin_af.csv / pin.csv combination only resolves the way a pin can be map...

The TTL high logic level is 2V for 5V, which is smaller than 3.3V, and thus it will work. Looking at the datasheet of the MPU-6050, it's actually 0.7*Vdd = 5*0.7 = 3.5V. So your Logic High must be higher than 3.5V - I presume that this will be out of spec if you applied a 3.3V logic high (or well -...

It also depends to which voltage you have connected the pullup resistors. I2C allows a small deviation between supplies, but not too much. 1) If the resistors are connected to 5V, the 3V device may cause trouble because internal protetcion diodes start to conduct as soon as the voltage applied to th...

1. no LED, SERVO, ACCEL, BUTTON, etc 2. no INVERT for pins. This is not a built in function of the MCU GPIO hardware ... my view as well. Pins have no inverted characteristics, but module have (LED's etc). I personally don't care which way "high" or "low" is written (be it set_value, high, low..). ...

I fully agree with @deshipu. There is some serious pycom bashing going on this forum. Fact is that pycom has: - sponsored Damien to develop the thread module and released that for the general community - initiated and supported the machine API (that is now the base of the running API discussion) - c...