Search found 387 matches

by loboris
Tue Jun 19, 2018 7:43 pm
Forum: Showcase
Topic: ESP32 TFT display library
Replies: 56
Views: 21500

Re: ESP32 TFT display library

@rolobr Thank you. Any help on making SD Card using SPI and this library work together ? I am stuck now since this an important requirement for me :( I have SDCard in SPI mode and display working together in my MicroPython project. It requires some changes to esp-idf sources ( sdmmc_cmd.c , spi_mas...
by loboris
Fri Jun 08, 2018 3:24 pm
Forum: Hardware
Topic: initial setup to view firmware logs
Replies: 2
Views: 93

Re: initial setup to view firmware logs

Do not use flow control.
by loboris
Mon Jun 04, 2018 12:56 pm
Forum: ESP32 IDF
Topic: SPI RAM - Support for other chips
Replies: 5
Views: 198

Re: SPI RAM - Support for other chips

WiFive wrote:https://www.digikey.com/en/product-highlight/m/microchip-technology/spi-serial-sram-nvsram-devices?

But $2/mbit vs $0.10/mbit

And max size 128 KB + max clock 20 MHz, quite unusable as ESP32 external RAM.
by loboris
Mon Jun 04, 2018 12:47 pm
Forum: General Discussion
Topic: Reading values of Onboard Temperature sensor
Replies: 3
Views: 248

Re: Reading values of Onboard Temperature sensor

The exaple code in test_tsens.c can also used for reading the internal temperature sensor.
It looks like temprature_sens_read() function from librtc.a always returns 128 with the latest master esp-idf.
by loboris
Mon Jun 04, 2018 6:42 am
Forum: ESP32 IDF
Topic: SPI RAM - Support for other chips
Replies: 5
Views: 198

Re: SPI RAM - Support for other chips

Hi all, I love the fact that the ESP32 supports SPI RAM. I understand that there are limitations to putting a lot of RAM on-die, so I appreciate the option of being able to implement external RAM. However, I was surprised to see that the only chip that's supported is the PSRAM chip manufactured by ...
by loboris
Fri Jun 01, 2018 7:08 pm
Forum: General Discussion
Topic: writing to NVS
Replies: 21
Views: 452

Re: writing to NVS

The links to two examples on the Non-volatile storage library documentation works fine:
storage/nvs_rw_value
storage/nvs_rw_blob
by loboris
Fri Jun 01, 2018 3:34 pm
Forum: General Discussion
Topic: Disabling boot log (MTDO pin) on ESP-WROOM-32
Replies: 6
Views: 185

Re: Disabling boot log (MTDO pin) on ESP-WROOM-32

boot ROM log is also sent out in case of esp_restart() is perfomed I don't get any boot ROM log after executing esp_restart() if the GPIO15 was pulled low on power on and then released. SDCard was used before reset. Hard reset (pulling EN low) has the same effect as power on, GPIO15 must be low for...
by loboris
Fri Jun 01, 2018 8:20 am
Forum: General Discussion
Topic: Disabling boot log (MTDO pin) on ESP-WROOM-32
Replies: 6
Views: 185

Re: Disabling boot log (MTDO pin) on ESP-WROOM-32

To disable the ROM log, GPIO15 has to be pulled low only during the very short period when the power is applied to the ESP32 (Power on reset). After that it can be used normaly for SD card interface. On all other kinds of resets GPIO15 can remain high and no ROM log will be emited. A simple circuit ...
by loboris
Wed May 30, 2018 7:35 pm
Forum: Hardware
Topic: need recommendation for WiFi antenna
Replies: 8
Views: 461

Re: need recommendation for WiFi antenna

Why selecting an external wifi antenna for WROVER-I would be any different then selecting the antenna for any other wifi device ?

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