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I've recently bought 2 of these power supplies, for my R Pi3s.. https://www.sparkfun.com/products/13831 It seems like the output voltage is too low for the Rpi, as it does not boot. The red power LED comes on, the green LED blinks, the yellow ethernet link LED comes on too, but nothing on the monito...

Re: Ardunio IDE does not see ESP32 Thing board

 by cappy ¦  Mon Feb 12, 2018 2:27 pm ¦  Forum: Arduino ¦  Topic: Ardunio IDE does not see ESP32 Thing board ¦  Replies: 5 ¦  Views: 779

renamed the directory to ' esp32' (full path is now C:\Users\paulvha\Documents\Arduino \hardware\expressif\esp32) I didn't need to rename the directory, it was already that way. However, under esp32 there is a directory called arduino-esp32 which is the git repo where all of the files are. I've mov...

Re: Ardunio IDE does not see ESP32 Thing board

 by cappy ¦  Sat Feb 10, 2018 7:15 am ¦  Forum: Arduino ¦  Topic: Ardunio IDE does not see ESP32 Thing board ¦  Replies: 5 ¦  Views: 779

Thanks,

but these are the same steps that I’ve already done.
https://github.com/espressif/arduino-es ... windows.md

Ardunio IDE does not see ESP32 Thing board

 by cappy ¦  Fri Feb 09, 2018 5:58 pm ¦  Forum: Arduino ¦  Topic: Ardunio IDE does not see ESP32 Thing board ¦  Replies: 5 ¦  Views: 779

Hello, I've just bought an ESP32 Thing from Sparkfun, installed Arduino IDE 1.8.5 on Windows 7 Pro, 64-bit. I've followed the steps at this link- without any problems. https://learn.sparkfun.com/tutorials/esp32-thing-hookup-guide#arduino-example-blink However, when I get to the "Select the Board and...

Re: Arduino Pro Mini 3.3v and FTDI 3.3v upload errors

 by cappy ¦  Thu Oct 06, 2011 10:21 am ¦  Forum: Arduino ¦  Topic: Arduino Pro Mini 3.3v and FTDI 3.3v upload errors ¦  Replies: 31 ¦  Views: 39814

Can I also use a Duemilanove (328) as an ISP programmer I'm almost positive you can. Follow the link to the ISP tutorial and be mindful of the different pins. I've looked at the schematic for the Duemilanove board as well as the Diecemilia board. The ISP connector pinout is the same for both. I've ...

Re: Arduino Pro Mini 3.3v and FTDI 3.3v upload errors

 by cappy ¦  Wed Oct 05, 2011 10:23 am ¦  Forum: Arduino ¦  Topic: Arduino Pro Mini 3.3v and FTDI 3.3v upload errors ¦  Replies: 31 ¦  Views: 39814

You can use the Arduino Uno as an ISP programmer using the ISP sketch and wiring it up correctly to the Arduino that needs the new bootloader. Can I also use a Duemilanove (328) as an ISP programmer, as long as it is connected correctly to the target board? In my case, I need to re-bootload a few t...

Re: Reading multiple digital pins with one instruction

 by cappy ¦  Fri Sep 30, 2011 10:14 am ¦  Forum: Arduino ¦  Topic: Reading multiple digital pins with one instruction ¦  Replies: 8 ¦  Views: 3177

It is way faster. I had to bit bang a serial interface to an LCD. Using the digitalwrite methods, you could watch the screen redraw. With the direct port manipulation the whole screen appeared to chage at the same time. Yeah, it's way faster. But would you care to comment why the symmetry is so dif...

Speeding up Arduino compile time

 by cappy ¦  Thu Sep 29, 2011 10:48 pm ¦  Forum: Arduino ¦  Topic: Speeding up Arduino compile time ¦  Replies: 0 ¦  Views: 430

Re: Reading multiple digital pins with one instruction

 by cappy ¦  Thu Sep 29, 2011 1:33 pm ¦  Forum: Arduino ¦  Topic: Reading multiple digital pins with one instruction ¦  Replies: 8 ¦  Views: 3177

The LCD I used was this one: http://www.sparkfun.com/products/8600 It is an SPI interface, but it wants 9 clocks! So I bit banged the data over. There are other serial LCD devices as well. Some are just text; others are graphic in nature. Some are I2C or SPI. Some are RS-232 or CMOS level RS-232. L...

Re: Reading multiple digital pins with one instruction

 by cappy ¦  Thu Sep 29, 2011 1:05 pm ¦  Forum: Arduino ¦  Topic: Reading multiple digital pins with one instruction ¦  Replies: 8 ¦  Views: 3177

It is way faster. I had to bit bang a serial interface to an LCD. Using the digitalwrite methods, you could watch the screen redraw. With the direct port manipulation the whole screen appeared to chage at the same time. I haven't been able to find any examples of serial interfaces to LCDs, for Ardu...

Re: Reading multiple digital pins with one instruction

 by cappy ¦  Thu Sep 29, 2011 12:19 pm ¦  Forum: Arduino ¦  Topic: Reading multiple digital pins with one instruction ¦  Replies: 8 ¦  Views: 3177

Yes it can be done. Try goggling "Arduino direct port manipulation". I've measured the time it takes to change a single bit, using direct port vs digitalWrite() using the code below. digitalWrite() -> 4uS direct port -> 139nS That's a lot more difference than I expected. Also, note the difference i...

Reading multiple digital pins with one instruction

 by cappy ¦  Tue Sep 27, 2011 11:10 pm ¦  Forum: Arduino ¦  Topic: Reading multiple digital pins with one instruction ¦  Replies: 8 ¦  Views: 3177

Is there a way to read multiple digital pins with one function call? I think digitalRead/digitalWrite are actually reading the entire 8 bits of one parallel port, and just masking off all bits except for the one passed as an argument to digitalRead/digitalWrite call. The reason I need to do this is ...

Re: Arduino Pro Mini 3.3v and FTDI 3.3v upload errors

 by cappy ¦  Sat Sep 24, 2011 4:31 pm ¦  Forum: Arduino ¦  Topic: Arduino Pro Mini 3.3v and FTDI 3.3v upload errors ¦  Replies: 31 ¦  Views: 39814

**SOLVED** (skip down to the solution toward the bottom if you are in a hurry) I originally asked for help in this post: http://forum.sparkfun.com/viewtopic.php?f=32&t=27105 but thought I should post my own solution since I was having a slightly different problem and what worked for those individua...

Need to run ATMEGA @ 8MHZ, instead of 16MHZ

 by cappy ¦  Thu Sep 22, 2011 2:20 pm ¦  Forum: Arduino ¦  Topic: Need to run ATMEGA @ 8MHZ, instead of 16MHZ ¦  Replies: 1 ¦  Views: 1744

I've bought some of these ATMEGA328 prototype boards http://www.makershed.com/ProductDetails.asp?ProductCode=MKSKL4. Due to the fact that I need to interface this to 3.3V logic, I need to change the regulator on this board to a 3.3V regulator. The data sheet for the ATMEGA328 shows that I need to lo...