Search found 8 matches

by Salakhov
Tue Feb 25, 2020 2:57 pm
Forum: ESP32 Arduino
Topic: SD_MMC writing and reading
Replies: 4
Views: 1097

Re: SD_MMC writing and reading

Hi. The code: /* * Connect the SD card to the following pins: * * SD Card | ESP32 * D2 12 * D3 13 * CMD 15 * VSS GND * VDD 3.3V * CLK 14 * VSS GND * D0 2 (add 1K pull up after flashing) * D1 4 */ #include "FS.h" #include "SD_MMC.h" void listDir(fs::FS &fs, const char * dirname, uint8_t levels){ Seri...
by Salakhov
Sat Feb 22, 2020 8:30 am
Forum: ESP32 Arduino
Topic: SD_MMC writing and reading
Replies: 4
Views: 1097

SD_MMC writing and reading

Using ESP32 WROVER KIT and library SD_MMC I have increased buffer size from 512 to 5120 bytes. Results are: Lexar 1800x 32GB HCII 11:57:17.800 -> 10485760 bytes read for 8773 ms 11:57:22.137 -> 10485760 bytes written for 4333 ms SanDisk Ultra 32GB HCI 12:05:13.484 -> 10485760 bytes read for 6835 ms ...
by Salakhov
Fri Feb 14, 2020 3:52 pm
Forum: ESP32 Arduino
Topic: ESP32 WROVER DOWNLOAD TOOL ERROR
Replies: 0
Views: 583

ESP32 WROVER DOWNLOAD TOOL ERROR

I am trying to burn firmware to new wrover module. Starting it is showing AP: 30AEA4C56741 STA: 30AEA4C56740 BT: 30AEA4C56742 ETHERNET: 30AEA4C56743 But after downloading is stopping (no green line) and ERROR. test offset : 4096 0x1000 case ok test offset : 32768 0x8000 case ok test offset : 65536 0...
by Salakhov
Sun Oct 06, 2019 2:37 pm
Forum: ESP32 Arduino
Topic: SDMMC again
Replies: 0
Views: 269

SDMMC again

Hi, I am trying to receive highest reading speed with ESP-WROVER-KIT. I use micro sd Sundisk ultra, 32GB, cl.10, 533x, 80MB/s both reading and writing. Result: 11:40:06.425 -> 1048576 bytes read for 693 ms 11:40:08.431 -> 1048576 bytes written for 1989 ms It looks too slow. How to increase speed und...
by Salakhov
Sun Sep 08, 2019 7:53 am
Forum: ESP32 Arduino
Topic: SDMMC ESP-WROVER-KIT
Replies: 0
Views: 334

SDMMC ESP-WROVER-KIT

Hi, I am trying to receive highest reading speed with ESP-WROVER-KIT. I use micro sd Sundisk ultra, 32GB, cl.10, 533x, 80MB/s both reading and writing. Result: 11:40:06.425 -> 1048576 bytes read for 693 ms 11:40:08.431 -> 1048576 bytes written for 1989 ms It looks too slow. How to increase speed und...
by Salakhov
Sat Aug 31, 2019 8:18 am
Forum: ESP32 Arduino
Topic: PSRAM
Replies: 1
Views: 434

PSRAM

Hi, For my POV project is necessary big memory for leds data arrays. RAM is not enough. If to move from WROOM TO WROVER B, is it possible to use PSRAM for this purpose at Arduino IDE? If YES, how to connect PSRAM and how slower it will be work? Thanks! P.S. May I use pins for SDMMC and vspi? SDMMC E...
by Salakhov
Mon Aug 26, 2019 8:34 am
Forum: ESP32 Arduino
Topic: VSPI, HSPI and SDMMC together.
Replies: 3
Views: 609

Re: VSPI, HSPI and SDMMC together.

Thank you very much for the reply.

What about speed of SDMMC and vspi if I shall not use hspi?
SDMMC
D2 12
D3 13
CMD 15
CLK 14
D0 2
D1 4.

vspi
SCLK = 18, MISO = 19, MOSI = 23, SS = 5.

P.S. Where to find description of SDMMC library? I have found only examples.

Thanks!
by Salakhov
Sat Aug 24, 2019 2:49 pm
Forum: ESP32 Arduino
Topic: VSPI, HSPI and SDMMC together.
Replies: 3
Views: 609

VSPI, HSPI and SDMMC together.

I make some POV project. Both VSPI and HSPI are used for 2 led strips control. SPI speed is maximal of possible one. It is 80MHz. Folowing default pins used: vspi SCLK = 18, MISO = 19, MOSI = 23, SS = 5 hspi SCLK = 14, MISO = 12, MOSI = 13, SS = 15 SD card is connected to pins: 27, 21, 4, 22. There ...

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