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NooM's ContentThere have been 301 items by NooM (Search limited from 05-June 23) #46370 Pushing the project out of the board
if you can get the boards and solder qfp64 (thats the smallest stm32f4, they are up to 176pins) its relativly easy. just the crystal has to be the same than netduino so it can run netduino firmware. when you do it yourself you can also use way more pins of the cip.
ive never done one myself.
the schematics are open source also, so you can look there what is used and connected to wich pin. #49557 i2C Question (retrieving value)
(0->~4000) doesent fit in a byte, so you have to send/read 2, and shift it right before/after.
like
byte[] ReadBuffer = new byte[2]; this._Device.ReadRegister(addr, ReadBuffer); int value = shift the byte correct here; return value; #46688 How do I get this servo running?
PWM pwm = new PWM(PWMChannels.yourpin, 100, .5, false); pwm.Start(); #45814 Active FTP Connection
idk where i got that, thx 4 info. #45812 Active FTP Connection
i read somewhere the netduino doesent accept multiple connections (only one at a time) - does it allready work for you ? (the ftp stuff with 2 connections) #46922 Is it possible to connect multiple mainboards together in a star network topo...
yes this is possible.
you can do this over ethernet or use wireless nodes (but they have to be in a tree like arrangement to work well) with nrf24l01+
if you just need output ports, you can use 74hc595 - they are very good for that, you can chain them up to quite a lot of outputs. its also way way cheaper than multiple netduinos. #45302 I do not get the Interrupt port stable
resistor.. did you use a pulldown?
Port.InterruptMode.InterruptEdgeHigh wants an external pulldown resistor.
Port.InterruptMode.InterruptEdgeLow wants an external or the internal pullup resistor.
edit: that doesent count for all devices, but most work that way #46095 How do you convert potentiometer values to voltage?
if you use the ms analog class just read - returns a single from 0-1 .. where 0 = 0% and 1 = 100% multiply it with 3.3 and you have the voltage.
like its value is 0.5 = 50% = 1.65v #46097 How do you convert potentiometer values to voltage?
btw: if you really _have to_ use the sl class (or used readRaw on ms class) the correct formula is: Single voltage= sensorValue * (3.3f / 1024f); #47399 Powering the Mini from a Netduino
yes its possible, but keep in mind the netduino cant supply unlimited power. read the datasheet for more information (i think its around 500-800ma, depends on the voltage you put in)
also, if you power it from usb, usb (2.0) can only supply 500ma max #45203 can N+2's firmware runs on a 144 pins STM32F405 chip without any code cha...
i think so, yes. the crystal has to be the same frequenzy. #50391 Thread Pooling
#47457 Faster Alternative
attiny85 or stm8's - but that needs some c coding. if you dont know that, i wouldnt bother. #47377 Faster Alternative
no there isnt. but you dont wanna faster processor for this, you just have todo this native, not managed.
id hook up a cheap attiny or mega to read the signals and than send the results to netduino per spi or something like that. theres also stm8 that will do well. #48640 Help with open collector transistor
no sry i dont know, it should be in the uC's datasheet
i guess its around 50kohm #48619 Help with open collector transistor
hm, for my pirs is just use netduinos on-ic pullups.
@hanzibal what? on your diagram is a pullup, wich is ok, but you dont want "and have the Netduino input pin configured in pulldown mode." that doesent even make sense. (it may waste energy and maybe burn something!) - btw: normal netduino doesent have pulldown mode, only pullup only gen2 hgave pulldown's.
another hint: when using internal pullups dont make a external want. and vice versa. #49435 NP2 - Using SPI1 as general SPI (not Ethernet)
i cant answer your question, but iam sure soldering wires will make way more noise/interference than just using 2 devices on one spi port. i mean thats what it is made for. also, there isnt any interferance, each spi device has a chipselect pin, wich activates it. when not activate it does nothing.
edit: also, when you think you can use 2 at the same time, thats not possible, you can read/write on one port, than the other, not at the same time. that would require dma, wich iam fairly sure is not in netmf. netmf's threading is also no real threds, never run 2 at the same time. #52194 Is broken my netduino 2?
if it was set to input, no. if the pin was set to output and low - maybe. #48894 The thread '<No Name>' (0x2) has exited with code
there is no problem, its normal. dont worry #46818 Trouble powering Mini using battery
http://wiki.netduino...mini_pinout.pdf
pin 21 is _only_ for 5v regulated. id not connect 4x1.6v batteries to it
the 9v bat should work fine on pin24 and gndpin
my mini runs with one 3.3volt battery (lifepo4) - i stepped it up to 5v and used pin21. #46843 Netduino Plus 2 + second SD Card
well, its doable.
you have to write your own drivers for it. #49075 Compatible SD Shield?
for 18 doubles an eeprom would be my choice. they are cheap and easy to use.
for the sd shield: i dont see a reason for it not to work. you have to call storagedevice.mount() and than you can use it. (ofc mount with the right parameters)
"but it does not appear to work" is no good description to really help you. post your code and what excat error you got
edit: also wich netduino you have, and wich sd card? netduino is limited to <= 2gb cards #49088 Compatible SD Shield?
the display is spi too ? so it uses the same for mosi, miso and sck - but needs a different chipselect. #49085 Compatible SD Shield?
sorry i dont know any tutorials, but netmf toolbox has a eeprom driver
i think the not working issue is becouse some of the display pins might collide with the sd shield one.
if you have the v3 its 3.3v compatible, the version 4 needs 5volt. maybe you try the sd shield alone, to figure out if it works, and than add the display
D10 – Used for CS of SPI #50426 I might be crazy. Is it possible serial events triggered by interrupt behave...
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