ESP8266 Developer Zone

Re: SPI support for AT commands?

2017-06-21T16:42:33+08:00

Dear all,

Some time ago, I asked if it would be possible to share the demo code of the STM32 SDIO interface example.

Are there any news of it? Did anybody succeed in connecting the ESP8266 over SDIO to a host MCU and could share his experience?

Many thanks in advance.

macload1

Statistics: Posted by macload1 — Wed Jun 21, 2017 4:42 pm

Re: SPI support for AT commands?

2017-04-24T18:20:11+08:00

Dear Pratik,

You mentioned you would check for the STM32 + ESP8266 SDIO example and get back to us.

Are there any news on this?

I'm also interested to get some high throughput applications embedded on a STM32 MCU. The ESP8266 seems able for this, because I already managed to have video streaming running over SDIO using a Raspberry Pi Zero (see https://hackaday.io/project/8678-rpi-wifi).

I would really appreciate you to share this STM32 demo. Many thanks in advance.

Best regards,
macload1

Statistics: Posted by macload1 — Mon Apr 24, 2017 6:20 pm

SPI support for AT commands

2017-04-18T20:01:00+08:00

I need to implement the master side of a 32-bit master/slave SPI interface on the TS4200/TS-8100.

I understand from the documentation that SPI is handled differently i.e. in the CPU on the TS-4200 board than the other TS-SOCKET boards.

Are there any sample programs available for doing this on the TS-4200?

Regards,

jw

.

Statistics: Posted by ShirleyPoima — Tue Apr 18, 2017 8:01 pm

Re: SPI support for AT commands?

2017-02-12T13:51:35+08:00

I think there is an STM32 + SDIO demo for WROOM-S2. I don't really recall if that was internal to Espressif team or public.
I will get back to one of your posts when I find out, please allow some time.

Statistics: Posted by Guest — Sun Feb 12, 2017 1:51 pm

Re: SPI support for AT commands?

2017-02-02T06:06:48+08:00

Hi,

Someone have developed integration of esp-wroom-s2 with mcu?

What is needed?

Thanks

Statistics: Posted by lloureiro — Thu Feb 02, 2017 6:06 am

Re: SPI support for AT commands?

2016-12-27T22:47:56+08:00

Hi! Not really. There's no popular demand for this right now. There may be firmware for this officially from Espressif at some point of time...but please don't take my word for it.
You may post on the Free Market section of the forum regarding this and someone will surely help you out! Using SDKs is better than porting the AT firmware itself. Freelancers are the way to go for this.

Statistics: Posted by Guest — Tue Dec 27, 2016 10:47 pm

Re: SPI support for AT commands?

2016-12-27T14:30:21+08:00

Hello Pratik,

I am working on a similar requirement.
Have you made any update on the SPI based AT+command set implementation?

Statistics: Posted by nirajmahapatro — Tue Dec 27, 2016 2:30 pm

Re: SPI support for AT commands?

2016-11-03T12:49:01+08:00

Yes, I fully agree with that there should be an interrupt mechanism... which is not there in any usual serial protocols! But there are devices like I/O expanders that include a separate interrupt line.
By the way, I might create SPI based AT firmware as a personal project if it seems to be worth the effort (will take a week's worth of work).
By the way, SDIO specs include an interrupt mechanism.

Statistics: Posted by Guest — Thu Nov 03, 2016 12:49 pm

Re: SPI support for AT commands?

2016-11-02T13:51:20+08:00

Having interrupt is something which is important and required capability.

When working with SDIO, I'm sure you need that capability of interrupt too, because host MCU is your master.
Anyway, if you will publish SPI based AT command communication (or not AT, maybe something else) with official software, that would be great.

Statistics: Posted by tilz0R — Wed Nov 02, 2016 1:51 pm

Re: SPI support for AT commands?

2016-11-02T13:04:15+08:00

AT+UART command can enable flow control for UART... you should try that out if you have a host MCU with very low RAM. Then you can have control over when data is sent out. The only reason you should opt for SPI is when you need high data transfer speed.

Officially, there is the SDIO firmware available with the latest nonOS SDK. An SDIO host controller would typically support that directly. You may see the documentation soon though.

As for SPI based communication, you need to implement a mechanism to interrupt the host if ESP8266 is used as SPI slave. Or you may read the status frequently using slave commands. There is no official release for this at this time, probably because that kind of setup is not very practical. I mean... if your host MCU has 512 bytes RAM, having SPI or UART makes no practical difference in most cases. So right now that is a possibility left out for developers who have such highly specific needs.
As with custom AT firmware, you may even combine SPI and UART and use SPI only for block transfers. Endless possibilities! But then it is all application specific.

Statistics: Posted by Guest — Wed Nov 02, 2016 1:04 pm

Re: SPI support for AT commands?

2016-10-30T03:24:26+08:00

Where is the actual datasheet regarding SPI/SDIO communication for AT commands?

UART is async between TX and RX, where SPI is not and master always makes transmission.
How does ESP notify user about new data to read via SPI?

How do we know how many bytes is ready to be read from ESP?
These are important facts no-where explained.

Saying "SPI is possible too" is not enough because SPI works totally other way than UART.

I hope I get my answers.

Statistics: Posted by tilz0R — Sun Oct 30, 2016 3:24 am

Re: SPI support for AT commands?

2016-08-23T16:04:25+08:00

Hello,

This can be done with the current AT firmware as well, with any module such as ESP-WROOM-02, ESP-12 etc. You just need to write code for accepting the command via HSPI port and not serial port.

Statistics: Posted by Guest — Tue Aug 23, 2016 4:04 pm

SPI support for AT commands?

2016-08-19T18:26:48+08:00

With the release of the ESP-WROOM-S2, which looks to add a free SPI interface for Host MCU Master -> WROOM module slave options, will there be a version of the AT application firmware that will response to the SPI interface instead of the UART interface?

Statistics: Posted by edpeckham — Fri Aug 19, 2016 6:26 pm