Search found 12 matches

by jakehuang
Tue Oct 31, 2017 4:12 pm
Forum: General Discussion
Topic: trying to get ethernet to serve as DHCP server
Replies: 3
Views: 7725

trying to get ethernet to serve as DHCP server

Hi guys, Many attempts trying to get ethernet to work as DHCP server (along with wifi as DHCP server AP as well). I think it's kinda odd but it's our requirement. Doesn't seem to work. Ethernet always get assigned an IP. I used tcpip_adapter DHCP calls in event handlers to set it up. Code is as foll...
by jakehuang
Sun Oct 15, 2017 2:56 pm
Forum: General Discussion
Topic: CPU architecture reference manual
Replies: 1
Views: 6401

CPU architecture reference manual

Hi guys, I wonder if we can access to the CPU architecture reference manual to esp32 dual core CPU similar to this http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html for ARM As you know Xtensa is not popular like ARM where resources are abundant. If ...
by jakehuang
Sun Oct 15, 2017 1:48 pm
Forum: General Discussion
Topic: single core freertos and tasks
Replies: 7
Views: 13824

Re: single core freertos and tasks

Thanks for the fast reply. I checked the source code for start_cpu0 and start_cpu1, while it seems it's viable to just roll my own start_cpu1 but the fact that esp32's version of freertos has been heavily modded and the OS behaves differently depending on whether or not both cores are enabled , make...
by jakehuang
Sun Oct 15, 2017 8:59 am
Forum: General Discussion
Topic: single core freertos and tasks
Replies: 7
Views: 13824

Re: single core freertos and tasks

BTW, I found that example apps have both cores enabled by default.
https://github.com/espressif/esp-idf-template only uses one core by default.
by jakehuang
Sun Oct 15, 2017 8:53 am
Forum: General Discussion
Topic: single core freertos and tasks
Replies: 7
Views: 13824

Re: single core freertos and tasks

Thanks ESP_igrr. I found that in the default template app. "make menuconfig" will show up with unicore freertos already selected. So by default freertos will only run in single core mode. In my application, I have a timer ISR which will run at 30kHz. This means the core is interrupted 30,000 times p...
by jakehuang
Sat Oct 14, 2017 12:18 pm
Forum: General Discussion
Topic: single core freertos and tasks
Replies: 7
Views: 13824

Re: single core freertos and tasks

Nobody have answers for these questions or the answers are already scattered in the forum...?
by jakehuang
Thu Oct 12, 2017 9:37 pm
Forum: General Discussion
Topic: single core freertos and tasks
Replies: 7
Views: 13824

single core freertos and tasks

Hi guys, I am in the middle of a project that does real time network communicate and at the same time the project also runs a timer interrupt at 30kHz. As you can see it is a very noisy ISR environment and latency is very important to me. I am trying to understand the behavior of all the tasks and f...
by jakehuang
Fri Jun 23, 2017 10:31 am
Forum: General Discussion
Topic: WROOM32 v1.0 vs v1.1 different trace antenna layout
Replies: 5
Views: 8784

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Thanks everyone for your timely help. That clears things up for us. I will get our engineers to modify our baords to use v1.0.

Again, thanks Expressif for prompt support!
by jakehuang
Thu Jun 22, 2017 5:02 am
Forum: General Discussion
Topic: WROOM32 v1.0 vs v1.1 different trace antenna layout
Replies: 5
Views: 8784

Re: WROOM32 v1.0 vs v1.1 different trace antenna layout

Yea, I just can't seem to get hold of the v1.1 anywhere. Someone at Expressif please help!
by jakehuang
Wed Jun 21, 2017 7:39 pm
Forum: General Discussion
Topic: WROOM32 v1.0 vs v1.1 different trace antenna layout
Replies: 5
Views: 8784

WROOM32 v1.0 vs v1.1 different trace antenna layout

Hi guys, While designing our next gen product, we found out that WROOM32 actually have two different trace antenna layout. This really creates problems for our PCB design. We will be using an extern antenna with our product and really need to make sure want have the test points at the right place. W...