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by WiFive
Tue May 23, 2017 6:40 pm
Forum: General Discussion
Topic: Clarification re. GPIO matrix and IO Mux
Replies: 5
Views: 49

Re: Clarification re. GPIO matrix and IO Mux

It depends on what you are using the pin for. Some case a pulldown resistor is fine, other case may need a switch.
by WiFive
Tue May 23, 2017 12:44 am
Forum: General Discussion
Topic: D0WD D2WD WROOM-32 WROVER deep sleep SPI Flash pSRAM
Replies: 7
Views: 121

Re: D0WD D2WD WROOM-32 WROVER deep sleep SPI Flash pSRAM

IMO the reason d2wd uses 16&17 for flash is because it was easier to wire bond between the two dies. So should be able to use 9&10 for psram with d2wd. But could be wrong.
by WiFive
Tue May 23, 2017 12:26 am
Forum: General Discussion
Topic: D0WD D2WD WROOM-32 WROVER deep sleep SPI Flash pSRAM
Replies: 7
Views: 121

Re: D0WD D2WD WROOM-32 WROVER deep sleep SPI Flash pSRAM

No, gpio 16&17 are in vdd_sdio domain that is why they were chosen for psram.

But yes it seems important to know about bootstrap requirements for wrover and d2wd.
by WiFive
Mon May 22, 2017 8:05 pm
Forum: General Discussion
Topic: Clarification re. GPIO matrix and IO Mux
Replies: 5
Views: 49

Re: Clarification re. GPIO matrix and IO Mux

Yes. Any function listed in gpio matrix signals list. Some signals only listed in MUX list restricted to those pins.
by WiFive
Mon May 22, 2017 7:25 pm
Forum: General Discussion
Topic: question about the oscillators
Replies: 5
Views: 58

Re: question about the oscillators

I'm not sure how you would remove an internal oscillator ;)
by WiFive
Mon May 22, 2017 1:44 pm
Forum: ESP32 SDK
Topic: BLE and WIFI simultaneously
Replies: 3
Views: 73

Re: BLE and WIFI simultaneously

Yes, there are some beacon scanner project on github that send scan result over wifi
by WiFive
Mon May 22, 2017 1:26 pm
Forum: ESP32 SDK
Topic: Why does get_rtc_time_us() truncate the result to uint32_t?
Replies: 20
Views: 244

Re: Why does get_rtc_time_us() truncate the result to uint32_t?

Sorry was calling system_get_time which has uint32_t return type along with the other system_ functions at the bottom of time.c. Also my local IDF was borked somehow and wasn't really building latest master even though it seemed so in git. For example had a components/soc folder in IDF directory but...
by WiFive
Mon May 22, 2017 3:28 am
Forum: ESP32 SDK
Topic: Why does get_rtc_time_us() truncate the result to uint32_t?
Replies: 20
Views: 244

Re: Why does get_rtc_time_us() truncate the result to uint32_t?

Also s_microseconds rolls over at 32-bit.

Code: Select all

RTC Time: 4330469173
FRC1 Time: 4260909211
RTC Time: 4391418173
FRC1 Time: 25941852
by WiFive
Sun May 21, 2017 11:59 pm
Forum: General Discussion
Topic: button common ground on ESP32 shuts MCU off
Replies: 2
Views: 31

Re: button common ground on ESP32 shuts MCU off

Connect the ground first, connect one button wire at a time. When does it reset and what gpio pin?
by WiFive
Sun May 21, 2017 11:07 pm
Forum: ESP32 SDK
Topic: Why does get_rtc_time_us() truncate the result to uint32_t?
Replies: 20
Views: 244

Re: Why does get_rtc_time_us() truncate the result to uint32_t?

RTC seems to gain 0.8-1.1sec/min on FRC1 in normal runtime mode.

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