Search found 47 matches

by kbaud1
Thu Mar 08, 2018 12:08 am
Forum: General Discussion
Topic: Looking for ESP32 Developer
Replies: 9
Views: 2283

Looking for ESP32 Developer

Not sure I posted this in the right forum. We are looking for another ESP32 developer to work on our team. This is for a wireless motor control project.
by kbaud1
Wed Mar 07, 2018 11:55 pm
Forum: General Discussion
Topic: using the SPI flash pins for other things
Replies: 7
Views: 2553

Re: using the SPI flash pins for other things

How do can I configure ESP32 to only use SPI dual (not quad) mode for all flash interface during normal program operation and also configure GPIO 9 & 10 for other use? Is this possible to do on ESP-VROOM-32?
by kbaud1
Wed Mar 07, 2018 11:54 pm
Forum: General Discussion
Topic: using the SPI flash pins for other things
Replies: 7
Views: 2553

Re: using the SPI flash pins for other things

Sure, we have used up all the GPIO and we need these pins for PWM output for motor control.
by kbaud1
Tue Mar 06, 2018 5:57 pm
Forum: General Discussion
Topic: using the SPI flash pins for other things
Replies: 7
Views: 2553

using the SPI flash pins for other things

I understand the SPI flash pins can be used as general GPIO. But if there is no flash chip connected, the part will not run an application or even possibly boot. So the flash has to be connected. I assume this means that after the part boots and the program is loaded, then the flash pins can be re p...
by kbaud1
Mon Mar 05, 2018 10:50 pm
Forum: General Discussion
Topic: ULP GPIO problems
Replies: 5
Views: 1482

Re: ULP GPIO problems

I used a 3.3K resistor to pull it down and measured the voltage. The 2.2K was only a rough visual estimate, I did not make a precise measurement or calculation.
by kbaud1
Mon Mar 05, 2018 10:06 pm
Forum: General Discussion
Topic: disable external flash on WROOM
Replies: 1
Views: 511

disable external flash on WROOM

Is it possible to send a chip deselect signal to the external flash memory on the WROOM so that some of the GPIO normally used to communicate with the flash chip are available for other purposes?
by kbaud1
Mon Mar 05, 2018 12:55 am
Forum: General Discussion
Topic: ULP access timer peripherals?
Replies: 6
Views: 1534

Re: ULP access timer peripherals?

Or how about the FRC1? Can the ULP access this?
http://esp-idf.readthedocs.io/en/latest ... _get_timev
by kbaud1
Mon Mar 05, 2018 12:48 am
Forum: General Discussion
Topic: ULP access timer peripherals?
Replies: 6
Views: 1534

Re: ULP access timer peripherals?

We are not trying to save power. we just need a clean read of the pins without fear of being preempted by another process. The ULP can do this but without a timer, it is inconsistent. Would it be possible to have a hardware timer output to a pin that the ULP can see? It would then use that as a refe...
by kbaud1
Mon Mar 05, 2018 12:35 am
Forum: General Discussion
Topic: ULP GPIO problems
Replies: 5
Views: 1482

Re: ULP GPIO problems

It is the rev 1 version of the DevkitC.
by kbaud1
Thu Mar 01, 2018 4:29 pm
Forum: General Discussion
Topic: ULP GPIO problems
Replies: 5
Views: 1482

ULP GPIO problems

Here is what I found from trial & error: - RTC bits 0-9 require the following initialization to be used as inputs from the ULP: rtc_gpio_init (IO#) - I don't see why this is required because the function description says "This function must be called when initializing a pad for an analog function." ...