Search found 155 matches

by eriksl
Fri Sep 07, 2018 3:56 pm
Forum: ESP8266 SDK
Topic: SDK v3
Replies: 1
Views: 515

SDK v3

I noted when switching to the current v3 SDK: - user_rf_pre_init is NO LONGER called (contrary what is said above). You can set a variable in your function and check it later to see. - user_rf_cal_sector_set is NO LONGER called (contrary what is said above). You can set a variable in your function a...
by eriksl
Wed Jan 17, 2018 5:20 pm
Forum: ESP8266 SDK
Topic: Stack pointer area?
Replies: 7
Views: 973

Re: Stack pointer area?

Or even better: just, public (!) confirmation from Espressif (or adjustments of course).
by eriksl
Fri Jan 12, 2018 5:53 pm
Forum: ESP8266 SDK
Topic: Stack pointer area?
Replies: 7
Views: 973

Re: Stack pointer area?

I am sharing my experiences about this here. I really hope some of the Espressif employees will step in and comment. Otherwise it may serve as starting point for others that have the same question. BTW this is all non-OS SDK. To start with, during the very early boot process, some functions in user ...
by eriksl
Mon Jan 08, 2018 1:59 am
Forum: ESP8266 SDK
Topic: Stack pointer area?
Replies: 7
Views: 973

Re: Stack pointer area?

Totally understood ;) I already guessed that would be the way to go if nobody could give me this information (either because unknown or because classified (for some stupid reason)). I'd simply allocate some growing array on the stack though, rather than having a function recurse on itself. Issue is ...
by eriksl
Fri Jan 05, 2018 4:24 pm
Forum: ESP8266 SDK
Topic: NONOS 2.0.0 to 2.1.0
Replies: 4
Views: 891

Re: NONOS 2.0.0 to 2.1.0

If you make any delay long enough, wifi will break anyway. I don't think you should use them, use timers instead.
by eriksl
Fri Jan 05, 2018 4:18 pm
Forum: ESP8266 SDK
Topic: Stack pointer area?
Replies: 7
Views: 973

Re: Stack pointer area?

Hi Pratik, Good to see you're still around here ;) You say this: The DRAM is actually 96kB. With nonOS SDK, the remaining 16kB gets used for ROM code. In RTOS SDK, you have the entire 96kB for data, bss, rodata and heap. Because heap is the flexible one here, it depends on the size of (data+bss+roda...
by eriksl
Wed Jan 03, 2018 3:50 am
Forum: ESP8266 SDK
Topic: Stack pointer area?
Replies: 7
Views: 973

Stack pointer area?

Hello All, This has been puzzling me more and more lately and I don't seem to find out anything about it (googled it...) According to https://github.com/esp8266/esp8266-wiki/wiki/Memory-Map: 3FFFC000h 4000h RAM ETS system data RAM. 3FFE8000h 14000h RAM RW User data RAM. Available to applications. In...
by eriksl
Sat Sep 16, 2017 7:08 pm
Forum: ESP8266 SDK
Topic: ESP8622 programmer using ESP8266
Replies: 4
Views: 1217

Re: ESP8622 programmer using ESP8266

The link doesn't give much information. Is this an USB-serial converter (like CP2102) and some connectors added?

What ESP's can fit out of the box? I need ESP01 and ESP201.
by eriksl
Wed Sep 13, 2017 8:23 pm
Forum: ESP8266 SDK
Topic: ESP8622 programmer using ESP8266
Replies: 4
Views: 1217

ESP8622 programmer using ESP8266

Has anyone already tried to make an ESP8266 serial programmer using an ESP8266? Something like ESP8266_1 connects to ESP8266_2 using serial, ESP8266_1 pulls up and down the GPIO_0, GPIO_2 and RST lines of ESP8266 and starts sending the new firmware. Most of this is not rocket science, but I am too l...
by eriksl
Wed Sep 06, 2017 10:31 pm
Forum: ESP8266 SDK
Topic: I2C Communication Fails with DS3231 RTC Module
Replies: 15
Views: 4033

Re: I2C Communication Fails with DS3231 RTC Module

As said I don't really have a purpose for very fast tcp or udp connections. Even if I'd want to, I have very little iram left, because the Espressif libs take up most of it. I've only about 4k left, from which I use 2k for interrupt handlers and timing critical code. I2C benefits greatly from code i...

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