Search found 22 matches

by wwwenrico
Thu Oct 04, 2018 9:46 am
Forum: Hardware
Topic: Antenna matching network question
Replies: 2
Views: 1611

Re: Antenna matching network question

Hi,

thank you for the answer.


DECOUPLING CAPACITOR
------------------------------
Are you aware that the antenna and the LNA input pin are not galvanic isolated?


thank you,
Enrico Migliore
by wwwenrico
Mon Oct 01, 2018 1:00 pm
Forum: Hardware
Topic: Antenna matching network question
Replies: 2
Views: 1611

Antenna matching network question

Hi, I'm designing a board with the ESP32. I noticed that in the latest hardware guideline, I mean the version V 2.4, the matching network changed. At chapter "2.1.5 RF" the document says: "A PI-type matching network is essential for antenna matching in the circuit design. C-L-C structure is recommen...
by wwwenrico
Fri Aug 31, 2018 4:38 am
Forum: Hardware
Topic: QUESTION - ESP32-D2WD + External ESP-PSRAM64
Replies: 6
Views: 2870

Re: QUESTION - ESP32-D2WD + External ESP-PSRAM64

Dear WiFive,

thank you for your reply.

I'll wait for the IDF to support the ESP-PSRAM64.

Thanks,
Enrico Migliore
by wwwenrico
Wed Aug 29, 2018 1:25 pm
Forum: Hardware
Topic: QUESTION - ESP32-D2WD + External ESP-PSRAM64
Replies: 6
Views: 2870

QUESTION - ESP32-D2WD + External ESP-PSRAM64

Hi, I purchased and received 3k ESP32-D2WD and 3k ESP-PSRAM64 chips. I'm designing a board with the ESP32-D2WD and with the ESP-PSRAM64. At page 9 of the 2.5 version of the datasheet I'm reading this: "ESP32-D2WD’s pins GPIO16, GPIO17, SD_CMD, SD_CLK, SD_DATA_0 and SD_DATA_1 are used for connecting ...
by wwwenrico
Tue May 29, 2018 10:27 am
Forum: ESP32 IDF
Topic: ESP32 - 8-bit parallel port capture using I2S + DMA
Replies: 4
Views: 2798

Re: ESP32 - 8-bit parallel port capture using I2S + DMA

Hi,

I forgot to say in my very previous post that:

1. The I2S is assisted by the DMA. That means that there's no CPU intervention.

2. The I2S will generate a CPU interrupt only at the end of the data burst capture

Ciao,
Enrico Migliore
by wwwenrico
Tue May 29, 2018 10:24 am
Forum: ESP32 IDF
Topic: ESP32 - 8-bit parallel port capture using I2S + DMA
Replies: 4
Views: 2798

Re: ESP32 - 8-bit parallel port capture using I2S + DMA

Dear Kolban, we too started out from: 1. The CAM-DEMO examples 2. The source file i2s_stream.c which is gittable at https://gist.github.com/cnlohr/2b9f8a26e891aa1a118f634cff9d04fe We've got something working right now. We are not ready yet for sharing the code though because the code is still dirty....
by wwwenrico
Mon May 28, 2018 1:17 pm
Forum: ESP32 IDF
Topic: ESP32 - 8-bit parallel port capture using I2S + DMA
Replies: 4
Views: 2798

ESP32 - 8-bit parallel port capture using I2S + DMA

Hi, I need to read a 4-bit parallel port device. The external device provides also the clock to the ESP32. The bit rate is 1 Mbit/s and each data burst is made of 8192 bits In idle, the clock signal is low. When transmitting, the clock signal goes high and low at 1 Mbit/s. Is there any reliable I2S ...
by wwwenrico
Thu May 24, 2018 4:10 pm
Forum: ESP32 IDF
Topic: ESP32 - I want to decode a Manchester bitstream using I2S
Replies: 2
Views: 1370

Re: ESP32 - I want to decode a Manchester bitstream using I2S

Dear Archibald, >> I do not understand why you are thinking of using I²S. I don't want the CPU busy in reading an decoding a bit at a time. I want the hardware (I2S + DMA) to sample the pin and put the value into RAM. Afterwards I will need the CPU intervention only for decoding the bit stream which...
by wwwenrico
Thu May 24, 2018 3:58 pm
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 367
Views: 145015

Re: What I would like to see in the next IoT chip

Hi, I'll also would like to see: 9. Wettable flanks QFN package like Texas Instruments and NXP for easy automatice AOI inspection: https://e2e.ti.com/blogs_/b/behind_the_wheel/archive/2016/02/03/the-value-of-wettable-flank-plated-qfn-packaging-for-automotive-applications https://e2e.ti.com/blogs_/b/...
by wwwenrico
Wed May 23, 2018 9:48 pm
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 367
Views: 145015

What I would like to see in the next IoT chip

Hi, I would like to give my little contribution to the "What I would like to see in the next IoT chip" discussion. This is my backgorund: I've been designing boards with GSM/GPRS/3G modules and software drivers for 22 years. I started to work in 1998 on the old Siemens M20 and I'm now working on the...

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