Search found 15 matches

by bienvenu
Fri Jul 30, 2021 9:14 am
Forum: ESP-IDF
Topic: Using Multiple interrupts in esp32
Replies: 12
Views: 12599

Re: Using Multiple interrupts in esp32

FWIW, I was using a normal RMII PHY (LAN7820A) and didn't hit these interrupt issues (that I know of?).

How/why did you guys select the ENC28J60?
by bienvenu
Thu Jul 09, 2020 9:11 am
Forum: ESP-IDF
Topic: Fast SPI communication with external ADC
Replies: 8
Views: 11230

Re: Fast SPI communication with external ADC

Small update on my previous post: Whilst ADC data flow "works fine" at 100kSPS, the THD+N of the captured waveform shows there is significant sampling jitter (or data misalignment). 50kSPS seems to work better. I think that it's a timing issue on the SPI handler - it may not get to run in between ea...
by bienvenu
Mon Jul 06, 2020 11:08 am
Forum: ESP-IDF
Topic: Fast SPI communication with external ADC
Replies: 8
Views: 11230

Re: Fast SPI communication with external ADC

Hi opcode_x64, Two days of head bashing, and I got that working. The esp-idf High Level Interrupt documentation needs to be updated, as we now need to add something to CMakeLists.txt to get it to link in the assembly (replace the last word with whatever you put at the bottom of the .S file: target_l...
by bienvenu
Sun Jul 05, 2020 12:18 pm
Forum: ESP-IDF
Topic: Fast SPI communication with external ADC
Replies: 8
Views: 11230

Re: Fast SPI communication with external ADC

I'm doing something similar, and have hit similar issues. If you really want to use the RMT to output signals, the only thing I could think of would be feeding the SCLK you output back into the ESP32 on another pin, and using a SPI peripheral in slave mode to read in the data. (I don't think you can...
by bienvenu
Mon Dec 05, 2016 1:50 am
Forum: General Discussion
Topic: FCC ID 2AC7Z-ESP32
Replies: 3
Views: 12959

Re: FCC ID 2AC7Z-ESP32

Figure 2-1 of 'ESP32_Certification_and_Test_Guide__EN.pdf' shows no antenna connection as the correct test setup for certification - that seems unlikely!
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by bienvenu
Fri Dec 02, 2016 7:46 am
Forum: General Discussion
Topic: Usable flash size / maximum partition size
Replies: 0
Views: 3750

Usable flash size / maximum partition size

Hi, I'm wondering whether we need a 32mbit flash, or if a 16mbit flash will suffice. For my application, I shouldn't need to store large chunks of data, just two OTA partitions. I see I need to set aside the first 64KB for the bootloader/partition table etc, and that app partitions need to be 64KB a...
by bienvenu
Tue Dec 29, 2015 2:57 pm
Forum: Report Bugs
Topic: Sporadic boot failure, >400mA draw
Replies: 2
Views: 8423

Re: Sporadic boot failure, >400mA draw

I wasn't able to reproduce this issue today (without your patch), so I can't confirm the fix. Not sure what's changed.

I'll make sure to try the fix out when it crops up again.
by bienvenu
Wed Dec 23, 2015 2:41 pm
Forum: Report Bugs
Topic: Sporadic boot failure, >400mA draw
Replies: 2
Views: 8423

Sporadic boot failure, >400mA draw

Occasionally (maybe one in 10~20 boots) I see the ESP31 fail to boot and draw a very high amount of current - I've seen between 450mA and 550mA (different for different occurrences). Repro: power cycle the module and look at the input current. I guess it's getting stuck in the PA calibration process...
by bienvenu
Sat Dec 19, 2015 12:46 am
Forum: General Discussion
Topic: Station mode instability - bcn_timout,ap_probe_send_start
Replies: 9
Views: 17684

Re: Station mode instability - bcn_timout,ap_probe_send_start

I'm using an external AP - an Apple Airport Express. Laptop isn't sleeping.
by bienvenu
Sat Dec 19, 2015 12:46 am
Forum: General Discussion
Topic: Flash Tool
Replies: 25
Views: 54533

Re: Flash Tool

rudi ;-) wrote:btw, read in, test yours and let me know.
http://esp32.com/viewtopic.php?f=14&t=62

but i think yours is running now?
best wishes
rudi ;-)
After you mentioned hot air, I gave the ESP31 IC a quick reflow and it has worked since. Thanks for the tip :)