Search found 15 matches

by caseymdk
Mon Jul 16, 2018 5:11 am
Forum: General Discussion
Topic: Understanding low-level SPI flash / SPI RAM usage and configuration
Replies: 0
Views: 476

Understanding low-level SPI flash / SPI RAM usage and configuration

Hi all! I've been trying to dive deep into the ESP32 internals, but can't quite find all the information I'm looking for. I'm trying to understand the process that configures the SPI flash for usage. Here are the couple points that I'm stuck on. I know that the ESP32 uses external flash for storing ...
by caseymdk
Fri Jun 29, 2018 5:39 pm
Forum: Report Bugs
Topic: LwIP Socket Memory Leak
Replies: 4
Views: 1601

Re: LwIP Socket Memory Leak

Hi Casey, Thanks for the detailed bug report. I was able to reproduce and have committed a fix for review internally. (You were on the right track: there is a static function is_created_by_socket() in api_lib.c which checks if a netconn has a controlling socket. If it does, netconn_free() is deferr...
by caseymdk
Thu Jun 21, 2018 6:00 am
Forum: Report Bugs
Topic: LwIP Socket Memory Leak
Replies: 4
Views: 1601

Re: LwIP Socket Memory Leak

Fantastic, thanks Angus! Happy to help. :)
by caseymdk
Wed Jun 20, 2018 7:35 pm
Forum: Report Bugs
Topic: LwIP Socket Memory Leak
Replies: 4
Views: 1601

LwIP Socket Memory Leak

Hello! So, I've been doing some work on TCP sockets with the ESP32, and it appears I have run into a memory leak that only appears if the socket failed to open. I have attached code for a sample program that reproduces the bug. In menuconfig, set the correct WiFi credentials for your network under "...
by caseymdk
Wed Jun 20, 2018 7:11 pm
Forum: ESP32 IDF
Topic: SPI RAM - Support for other chips
Replies: 9
Views: 3305

Re: SPI RAM - Support for other chips

I have not, I'm not at a point where I can buy large volumes, which I assume I'd need to in order to get it direct.
by caseymdk
Mon Jun 04, 2018 7:58 pm
Forum: ESP32 IDF
Topic: SPI RAM - Support for other chips
Replies: 9
Views: 3305

Re: SPI RAM - Support for other chips

And max size 128 KB + max clock 20 MHz, quite unusable as ESP32 external RAM. Yes, but even more unusable is the lack of the ESP-PSRAM chip from distributors...I would much rather use a different, 128KB chip than nothing. Is the 20MHz a deal-breaker? Looks like the ESP32 runs external RAM at 40MHz ...
by caseymdk
Mon Jun 04, 2018 6:09 am
Forum: ESP32 IDF
Topic: SPI RAM - Support for other chips
Replies: 9
Views: 3305

SPI RAM - Support for other chips

Hi all, I love the fact that the ESP32 supports SPI RAM. I understand that there are limitations to putting a lot of RAM on-die, so I appreciate the option of being able to implement external RAM. However, I was surprised to see that the only chip that's supported is the PSRAM chip manufactured by E...
by caseymdk
Mon May 21, 2018 9:24 pm
Forum: ESP32 IDF
Topic: ESP32 memmem?
Replies: 2
Views: 513

ESP32 memmem?

Hi there, I am trying to use the memmem function from newlib, but I'm getting "error: implicit declaration of function 'memmem'", despite including "string.h". I can see code for memmem in the newlib code for the esp32...is it for some reason not included in the IDF? I imagine there is some silly re...
by caseymdk
Sat Feb 10, 2018 6:10 am
Forum: General Discussion
Topic: Heap corruption diagnostics causing heap corruption?.
Replies: 32
Views: 8670

Re: Heap corruption diagnostics causing heap corruption?.

ESP_Angus wrote: I'm not really aware of a non serious type of memory corruption bug...
Goood point. Cheers Angus.
by caseymdk
Fri Feb 09, 2018 8:33 pm
Forum: General Discussion
Topic: Heap corruption diagnostics causing heap corruption?.
Replies: 32
Views: 8670

Re: Heap corruption diagnostics causing heap corruption?.

I just updated to the latest IDF incl. submodules and am now running with comprehensive mode. No longer crashed on startup so that's a good sign. Will leave it overnight and report back. - memcpy(new_p, ptr, old_size); + memcpy(new_p, ptr, MIN(size, old_size)); Whew...that seems like a major buffer...

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