Search found 90 matches

by markwj
Mon Jan 29, 2018 5:28 am
Forum: Hardware
Topic: ESP WROVER Flash Size
Replies: 6
Views: 9154

ESP WROVER Flash Size

Similar to the topic for WROOM-32, but for WROVER. We can add an external 1.8v flash, external 1.8v regulator (as VDD_SDIO is not exposed), but the issue is the CS line for external flash. Given that GPIO16 and GPIO17 (the last two remaining GPIOs in VDD_SDIO domain) are used for PSRAM inside the mo...
by markwj
Sat Jan 20, 2018 6:05 am
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 426
Views: 783375

Re: What would you like to see in The Next Chip?

Short list of top 5: More GPIO (in both 3.3v and VDD_SDIO domains). More internal RAM, or a way to move more to external PSRAM. A chip with 520KB RAM, bluetooth, and wifi is great; but how much of that RAM is available once Wifi and Bluetooth plus a reasonable set of functions are enabled? 20%? Modu...
by markwj
Sat Jan 20, 2018 5:35 am
Forum: Hardware
Topic: Need help to connect external 16 MB SPI Flash Memory on ESP32-WROVER Kit
Replies: 34
Views: 64909

Re: Need help to connect external 16 MB SPI Flash Memory on ESP32-WROVER Kit

We had finalized to use 1.8 v supported external memory and also finalized to change default memory as external memory instead of internal memory. So, with that we can use external memory as well as 4 MB PSRAM for more memory allocation purpose. Let me know if need any help regarding this as e had ...
by markwj
Sat Jan 20, 2018 5:22 am
Forum: ESP-IDF
Topic: Hash verification fails when I use ota feature, I need the bin file format。
Replies: 5
Views: 7674

Re: Hash verification fails when I use ota feature, I need the bin file format。

zhoupeng wrote:thank you,I have solved this problem
It would be helpful if you could explain the issue, and solution, to help others in the same situation.
by markwj
Wed Jan 17, 2018 5:49 am
Forum: General Discussion
Topic: OTA -- How to Compute SHA256 of the running firmware?
Replies: 4
Views: 6631

Re: OTA -- How to Compute SHA256 of the running firmware?

ESP_Angus wrote:I've added a feature request to add a function to read this SHA-256, as this will allow easy identification of the running image.
That would be very useful. Is there any timeline for this? Or reference to the feature request (GitHub issue?)
by markwj
Fri Jan 12, 2018 1:03 am
Forum: ESP-IDF
Topic: Using SPI RAM from C++ programs
Replies: 3
Views: 5456

Using SPI RAM from C++ programs

Any suggestions for the best way to use SPI RAM from C++ programs? I tried setting the "SPI RAM access method" to "Make RAM allocatable using malloc() as well", and reducing "Maximum malloc() size, in bytes, to always put in internal memory" to 32 bytes, but get this crash on startup: #0 0x4008dfbc ...
by markwj
Wed Jan 10, 2018 11:50 pm
Forum: Hardware
Topic: WROOM-32
Replies: 6
Views: 8701

Re: WROOM-32

AnalogLamb also sells the ALB-WROOM – ESP32 , without psRAM with 4/8/16 MB Flash ($3.49–$4.69). Unfortunately uncertified and open top design, so not really suited to larger scale projects. The WROOM-32 module with PSRAM is interesting, but long lead time and just under US$10/module makes it too ex...
by markwj
Tue Jan 09, 2018 5:24 am
Forum: Hardware
Topic: WROOM-32
Replies: 6
Views: 8701

Re: WROOM-32

The lack of VDD_SDIO exposed on the WROVER modules, along with limited GPIOs, makes adding external flash troublesome. I really hope that Espressif can release WROOM-32 and WROVER modules with 16MB flash as a standard product. Given the difference in flash price (<$1), and OTA arrangements (factory ...
by markwj
Tue Jan 09, 2018 5:21 am
Forum: ESP-IDF
Topic: More SDCARD issues
Replies: 7
Views: 10097

Re: More SDCARD issues

Resolved for me in ESP IDF 3.0b1 (or later). The issue seems to have been fixed by Espressif within the last month or two.
by markwj
Tue Jan 09, 2018 5:20 am
Forum: Hardware
Topic: ESP-WROOM-32 Flash Size
Replies: 15
Views: 43539

Re: ESP-WROOM-32 Flash Size

From what I can tell, this arrangement breaks SD CARD support. I ca't get any reply from Espressif on my other issues raised regarding this, but SDCARD works fine with default WROOM-32 module, but breaks when this external flash arrangement is used. Issue is actually caused by ANY flash size >4MB (...